/* ===== DARK NEON GREEN THEME ===== */
:root {
    --neon: #226f41;
    --neon-dim: #1B5A35;
    --neon-glow: rgba(34, 111, 65, 0.45);
    --neon-subtle: rgba(34, 111, 65, 0.12);
    --primary: #226f41;
    --primary-dark: #1B5A35;
    --primary-light: #2E9B5A;
    --bg: #0A0A0F;
    --bg-card: #12121A;
    --bg-elevated: #1A1A25;
    --card-bg: #12121A;
    --text: #FFFFFF;
    --text-light: #E0E0E8;
    --text-muted: #A8A8BE;
    --text-secondary: #C0C0D0;
    --success: #226f41;
    --warning: #FACC15;
    --danger: #FF3B5C;
    --border: rgba(34, 111, 65, 0.15);
    --border-subtle: rgba(255, 255, 255, 0.1);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.6);
    --shadow-neon: 0 0 20px rgba(34, 111, 65, 0.2);
    --radius: 14px;
    --radius-sm: 10px;
    --gradient: linear-gradient(135deg, #226f41, #2E9B5A);
    --gradient-warm: linear-gradient(135deg, #1B5A35, #226f41, #2E9B5A);
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.12);
}

/* ===== LIGHT THEME ===== */
[data-theme="light"] {
    --neon: #1a7a3a;
    --neon-dim: #15602e;
    --neon-glow: rgba(26, 122, 58, 0.25);
    --neon-subtle: rgba(26, 122, 58, 0.08);
    --primary: #1a7a3a;
    --primary-dark: #15602e;
    --primary-light: #22a84e;
    --bg: #f5f6f8;
    --bg-card: #ffffff;
    --bg-elevated: #f0f1f4;
    --card-bg: #ffffff;
    --text: #1a1a2e;
    --text-light: #4a4a6a;
    --text-muted: #8888a0;
    --success: #1a7a3a;
    --warning: #d4a017;
    --danger: #dc2f4a;
    --border: rgba(26, 122, 58, 0.15);
    --border-subtle: rgba(0, 0, 0, 0.08);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-neon: 0 0 20px rgba(26, 122, 58, 0.1);
    --gradient: linear-gradient(135deg, #1a7a3a, #22a84e);
    --gradient-warm: linear-gradient(135deg, #15602e, #1a7a3a, #22a84e);
    --glass: rgba(0, 0, 0, 0.02);
    --glass-border: rgba(0, 0, 0, 0.06);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

body > .container {
    animation: fadeIn 0.5s ease-out;
}

a {
    color: var(--neon);
    text-decoration: none;
    transition: all 0.25s;
}

a:hover {
    color: var(--neon);
    text-shadow: 0 0 8px var(--neon-glow);
}

svg {
    vertical-align: middle;
    flex-shrink: 0;
}

::selection {
    background: rgba(34, 111, 65, 0.2);
    color: #fff;
}

:focus-visible {
    outline: 2px solid var(--neon);
    outline-offset: 2px;
}

/* ===== NAVBAR ===== */
.navbar {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 0 2rem;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.navbar-brand {
    color: #fff;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.navbar-brand span {
    color: var(--neon);
    text-shadow: 0 0 10px var(--neon-glow);
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-links a,
.navbar-links button {
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: all 0.25s;
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

.navbar-links a:hover,
.navbar-links button:hover {
    background: var(--neon-subtle);
    color: var(--neon);
    text-shadow: 0 0 8px var(--neon-glow);
}

.navbar-links a.active {
    background: var(--neon-subtle);
    color: var(--neon);
    position: relative;
}

.navbar-links a.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 20%;
    right: 20%;
    height: 2px;
    background: var(--neon);
    border-radius: 1px;
    box-shadow: 0 0 8px var(--neon-glow);
}

.navbar-links .btn-nav-outline {
    border: 1.5px solid rgba(34, 111, 65, 0.3);
    background: rgba(34, 111, 65, 0.05);
}

/* ===== CONTAINER ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

/* ===== HERO ===== */
.hero {
    text-align: center;
    padding: 3rem 1rem;
    margin-bottom: 1rem;
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.5rem;
    animation: fadeInDown 0.6s ease-out;
}

.hero h1 span {
    color: var(--neon);
    text-shadow: 0 0 20px var(--neon-glow), 0 0 40px rgba(34, 111, 65, 0.15);
}

.hero p {
    color: var(--text);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
    animation: fadeInUp 0.6s ease-out 0.15s both;
}

/* ===== FILTER DROPDOWN ===== */
.filter-dropdown {
    position: relative;
    z-index: 100;
}

.filter-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1.1rem;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    border-radius: 50px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: inherit;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.filter-toggle:hover,
.filter-toggle.open {
    border-color: var(--neon);
    color: var(--neon);
    box-shadow: 0 0 15px rgba(34, 111, 65, 0.1);
}

.filter-chevron {
    transition: transform 0.3s;
}

.filter-toggle.open .filter-chevron {
    transform: rotate(180deg);
}

.filter-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    min-width: 200px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.4rem;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(34, 111, 65, 0.05);
    backdrop-filter: blur(20px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 100;
}

.filter-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.filter-option {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: 100%;
    padding: 0.55rem 0.85rem;
    border: none;
    background: transparent;
    color: var(--text);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    font-family: inherit;
    transition: all 0.2s;
}

.filter-option:hover {
    background: var(--neon-subtle);
    color: var(--neon);
}

.filter-option.active {
    background: rgba(34, 111, 65, 0.12);
    color: var(--neon);
    font-weight: 700;
}

.filter-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.filter-dot-all {
    background: conic-gradient(#34D399 0deg 120deg, #226f41 120deg 240deg, #1B5A35 240deg 360deg);
    box-shadow: 0 0 6px rgba(34, 111, 65, 0.4);
}

.filter-dot-beginner {
    background: #34D399;
    box-shadow: 0 0 6px rgba(110, 231, 183, 0.5);
}

.filter-dot-intermediate {
    background: #226f41;
    box-shadow: 0 0 6px rgba(34, 111, 65, 0.5);
}

.filter-dot-advanced {
    background: #1B5A35;
    box-shadow: 0 0 6px rgba(5, 150, 105, 0.5);
}

/* ===== CARDS GRID ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
}

/* ===== PROBLEM CARD ===== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--border-subtle);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    animation: floatUp 0.6s ease-out both;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px var(--neon-glow);
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(34, 111, 65, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(34, 111, 65, 0.08);
}

.cards-grid .card:nth-child(1) { animation-delay: 0s; }
.cards-grid .card:nth-child(2) { animation-delay: 0.08s; }
.cards-grid .card:nth-child(3) { animation-delay: 0.16s; }
.cards-grid .card:nth-child(4) { animation-delay: 0.24s; }
.cards-grid .card:nth-child(5) { animation-delay: 0.32s; }
.cards-grid .card:nth-child(6) { animation-delay: 0.4s; }

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    line-height: 1.4;
    flex: 1;
    margin-right: 0.5rem;
}

.card-desc {
    color: var(--text);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.tag {
    background: rgba(34, 111, 65, 0.15);
    color: #2E9B5A;
    padding: 0.25rem 0.7rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid rgba(34, 111, 65, 0.25);
    transition: all 0.25s;
}

.tag:hover {
    background: rgba(34, 111, 65, 0.25);
    color: #34D399;
    border-color: rgba(34, 111, 65, 0.4);
    box-shadow: 0 0 12px rgba(34, 111, 65, 0.15);
    transform: scale(1.05);
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-light);
    font-size: 0.8rem;
    flex: 1;
    min-width: 0;
    flex-wrap: wrap;
}

.card-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    white-space: nowrap;
}

/* ===== BADGES ===== */
.badge {
    padding: 0.3rem 0.85rem;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
    -webkit-appearance: none;
    appearance: none;
    display: inline-block;
    line-height: 1.4;
}

.badge-beginner {
    background: transparent;
    color: #34D399;
    border: 1.5px solid #34D399 !important;
    text-shadow: 0 0 8px rgba(110, 231, 183, 0.3);
}

.badge-intermediate {
    background: transparent;
    color: #226f41;
    border: 1.5px solid #226f41 !important;
    text-shadow: 0 0 8px rgba(34, 111, 65, 0.3);
}

.badge-advanced {
    background: transparent;
    color: #1B5A35;
    border: 1.5px solid #1B5A35 !important;
    text-shadow: 0 0 8px rgba(5, 150, 105, 0.3);
}

/* ===== ADMIN ACTIONS ===== */
.admin-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
    margin-left: auto;
}

.btn-icon {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    transition: all 0.25s;
    background: var(--neon-subtle);
    color: var(--text-light);
}

.btn-icon:hover {
    background: var(--neon);
    color: #000;
    box-shadow: 0 0 15px var(--neon-glow);
}

.btn-icon.delete:hover {
    background: var(--danger);
    color: #fff;
    box-shadow: 0 0 15px rgba(255, 59, 92, 0.4);
}

/* ===== BOOKMARK / SAVE BUTTON ===== */
.btn-bookmark {
    background: rgba(34, 111, 65, 0.08);
    border: 1px solid var(--neon);
    border-radius: 8px;
    padding: 0.35rem;
    cursor: pointer;
    color: var(--neon);
    transition: all 0.25s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.btn-bookmark:hover {
    color: var(--neon);
    border-color: var(--neon);
    background: rgba(34, 111, 65, 0.12);
    transform: scale(1.15);
}

.btn-bookmark.saved {
    color: var(--neon);
    background: rgba(34, 111, 65, 0.18);
    border-color: var(--neon);
}

.btn-bookmark.saved:hover {
    color: #ff6b6b;
    border-color: #ff6b6b;
    background: rgba(255, 107, 107, 0.12);
}

/* Save button on problem detail page */
.btn-save-problem {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--neon);
    background: rgba(34, 111, 65, 0.08);
    color: var(--neon);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.25s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-save-problem:hover {
    border-color: var(--neon);
    color: var(--neon);
    background: rgba(34, 111, 65, 0.08);
}

.btn-save-problem.saved {
    border-color: var(--neon);
    color: var(--neon);
    background: rgba(34, 111, 65, 0.15);
    box-shadow: 0 0 12px rgba(34, 111, 65, 0.2);
}

.btn-save-problem.saved svg {
    fill: var(--neon);
}

.btn-save-problem.saved:hover {
    border-color: #ff6b6b;
    color: #ff6b6b;
    background: rgba(255, 107, 107, 0.08);
    box-shadow: none;
}

/* Saved page header */
.saved-page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.saved-page-title {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-light);
}

.saved-page-title svg {
    color: var(--neon);
}

.saved-page-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-top: 0.25rem;
}

.saved-count {
    color: var(--text-muted);
    font-size: 0.9rem;
    background: var(--bg-card);
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-subtle);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
}

.btn-primary {
    background: var(--gradient);
    color: #000;
    box-shadow: 0 4px 20px rgba(34, 111, 65, 0.25);
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.btn-primary:hover {
    box-shadow: 0 6px 30px rgba(34, 111, 65, 0.4);
    transform: translateY(-2px);
}

.btn-primary:hover::after {
    opacity: 1;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-danger:hover {
    box-shadow: 0 4px 20px rgba(255, 59, 92, 0.4);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--neon);
    color: var(--neon);
}

.btn-outline:hover {
    background: var(--neon);
    color: #000;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(34, 111, 65, 0.3);
}

.btn-sm {
    padding: 0.4rem 1rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 0.85rem 2rem;
    font-size: 1rem;
}

.btn-ghost {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    font-family: inherit;
    transition: all 0.25s;
}

.btn-ghost:hover {
    background: rgba(255, 59, 92, 0.1);
    color: var(--danger);
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: var(--text);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text);
    transition: all 0.3s;
    background: var(--bg-elevated);
}

.form-control:focus {
    outline: none;
    border-color: var(--neon);
    box-shadow: 0 0 0 3px rgba(34, 111, 65, 0.1), 0 0 15px rgba(34, 111, 65, 0.05);
}

.form-control::placeholder {
    color: var(--text-light);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

select.form-control {
    cursor: pointer;
}

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-elevated);
    border-radius: var(--radius);
    padding: 2rem;
    width: 90%;
    max-width: 550px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5), 0 0 30px rgba(34, 111, 65, 0.05);
    transform: translateY(20px);
    transition: transform 0.3s;
    border: 1px solid var(--border);
}

.modal-overlay.active .modal {
    transform: translateY(0);
    animation: modalSlideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    padding: 0.25rem;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--neon);
}

/* ===== SOLUTION CARD ===== */
.solution-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-subtle);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    animation: floatUp 0.5s ease-out both;
}

.solution-card:hover {
    transform: translateY(-4px);
    border-color: rgba(34, 111, 65, 0.15);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3), 0 0 20px rgba(34, 111, 65, 0.05);
}

.solution-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.solution-author {
    font-weight: 600;
    color: #fff;
}

.solution-date {
    color: var(--text-light);
    font-size: 0.8rem;
}

.solution-desc {
    color: var(--text);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.solution-repo {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--neon-subtle);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--neon);
    margin-bottom: 1rem;
    word-break: break-all;
    border: 1px solid rgba(34, 111, 65, 0.1);
    transition: all 0.25s;
}

.solution-repo:hover {
    background: rgba(34, 111, 65, 0.12);
    box-shadow: 0 0 15px rgba(34, 111, 65, 0.1);
}

.solution-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-subtle);
}

.like-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-sm);
    transition: all 0.25s;
    font-family: inherit;
}

.like-btn:hover {
    background: rgba(255, 59, 92, 0.1);
    color: #FF3B5C;
}

.like-btn.liked {
    color: #FF3B5C;
    animation: heartPop 0.4s ease-out;
}

.comment-toggle {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-sm);
    transition: all 0.25s;
    font-family: inherit;
}

.comment-toggle:hover {
    background: var(--neon-subtle);
    color: var(--neon);
}

/* ===== COMMENTS SECTION ===== */
.comments-section {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
    display: none;
}

.comments-section.open {
    display: block;
}

.comment-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-subtle);
    animation: fadeIn 0.3s ease-out;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.4rem;
}

.comment-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.comment-avatar-initial {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gradient);
    color: #000;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    flex-shrink: 0;
}

.comment-item:last-of-type {
    border-bottom: none;
}

.comment-author {
    font-weight: 600;
    font-size: 0.85rem;
    color: #fff;
}

.comment-time {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-left: 0.5rem;
}

.comment-text {
    color: var(--text);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-top: 0.25rem;
}

.comment-form {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.comment-form input {
    flex: 1;
    padding: 0.6rem 1rem;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-family: inherit;
    background: var(--bg-elevated);
    color: var(--text);
    transition: border-color 0.3s;
}

.comment-form input:focus {
    outline: none;
    border-color: var(--neon);
    box-shadow: 0 0 10px rgba(34, 111, 65, 0.08);
}

.comment-form button {
    padding: 0.6rem 1.25rem;
    background: var(--gradient);
    color: #000;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    font-size: 0.85rem;
    font-family: inherit;
    transition: all 0.3s;
}

.comment-form button:hover {
    box-shadow: 0 4px 15px rgba(34, 111, 65, 0.3);
    transform: translateY(-1px);
}

/* ===== PROBLEM DETAIL ===== */
.problem-detail {
    max-width: 900px;
    margin: 0 auto;
}

.problem-detail-header {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-subtle);
    position: relative;
    overflow: hidden;
}

.problem-detail-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    box-shadow: 0 0 15px var(--neon-glow);
}

.problem-detail-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: #fff;
}

.problem-detail-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.problem-detail-desc {
    color: var(--text);
    font-size: 1rem;
    line-height: 1.8;
    white-space: pre-wrap;
}

.solutions-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.solutions-header h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
}

/* ===== PROFILE ===== */
.profile-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    margin-bottom: 2rem;
    border: 1px solid var(--border-subtle);
    position: relative;
    overflow: hidden;
    transition: all 0.35s;
}

.profile-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    box-shadow: 0 0 15px var(--neon-glow);
}

.profile-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3), 0 0 20px rgba(34, 111, 65, 0.05);
}

.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient);
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    margin: 0 auto 1rem;
    box-shadow: 0 0 25px var(--neon-glow);
    animation: scaleIn 0.5s ease-out;
}

.profile-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
}

.profile-username {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.profile-bio {
    color: var(--text);
    font-size: 0.95rem;
}

/* ===== TOAST ===== */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    color: #000;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s;
    max-width: 350px;
}

.toast-success {
    background: var(--neon);
    box-shadow: 0 4px 20px rgba(34, 111, 65, 0.3);
}

.toast-error {
    background: var(--danger);
    color: #fff;
    box-shadow: 0 4px 20px rgba(255, 59, 92, 0.3);
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-light);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.empty-state h3 {
    font-size: 1.2rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}

/* ===== LOADING ===== */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--neon);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 1rem;
    box-shadow: 0 0 10px rgba(34, 111, 65, 0.1);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== MY SUBMISSIONS ===== */
.submissions-hero {
    text-align: center;
    padding: 2rem 1rem 1rem;
    margin-bottom: 1.5rem;
}

.submissions-hero h1 {
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.25rem;
    animation: fadeInDown 0.6s ease-out;
}

.submissions-hero p {
    color: var(--text-light);
    font-size: 1rem;
}

.submissions-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-align: center;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    animation: floatUp 0.5s ease-out both;
}

.stat-card:nth-child(1) { animation-delay: 0s; }
.stat-card:nth-child(2) { animation-delay: 0.1s; }
.stat-card:nth-child(3) { animation-delay: 0.2s; }

.stat-card:hover {
    transform: translateY(-5px);
    border-color: rgba(34, 111, 65, 0.2);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(34, 111, 65, 0.06);
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--neon);
    text-shadow: 0 0 15px var(--neon-glow);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 0.25rem;
}

.submissions-toolbar {
    margin-bottom: 1.5rem;
}

.sort-pills {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.sort-pill {
    padding: 0.45rem 1.15rem;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    border-radius: 50px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: inherit;
    transition: all 0.3s;
}

.sort-pill:hover {
    border-color: var(--neon);
    color: var(--neon);
}

.sort-pill.active {
    background: var(--gradient);
    border-color: transparent;
    color: #000;
    box-shadow: 0 4px 20px rgba(34, 111, 65, 0.25);
}

.submission-item {
    cursor: pointer;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    animation: floatUp 0.4s ease-out both;
    position: relative;
    overflow: hidden;
}

.submission-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s;
    box-shadow: 0 0 10px var(--neon-glow);
}

.submission-item:hover::before {
    transform: scaleX(1);
}

.submission-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(34, 111, 65, 0.06);
    border-color: rgba(34, 111, 65, 0.2);
}

.submission-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-subtle);
}

/* ===== SOLUTION AVATAR ===== */
.solution-avatar-initial {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient);
    color: #000;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    flex-shrink: 0;
}

/* ===== DETAIL LAYOUT (Two-Column) ===== */
.detail-layout {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.detail-main {
    flex: 1;
    min-width: 0;
}

.top-solutions-panel {
    width: 360px;
    flex-shrink: 0;
    animation: fadeInLeft 0.4s ease-out;
}

.top-solutions-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 80px;
    max-height: calc(100vh - 96px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.top-solutions-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 2px solid rgba(34, 111, 65, 0.15);
    flex-shrink: 0;
}

.top-solutions-header h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--neon);
    text-shadow: 0 0 10px var(--neon-glow);
}

.top-solutions-list {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 1.25rem;
}

/* Side panel solution card */
.sp-solution {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
    position: relative;
    overflow: hidden;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    animation: floatUp 0.4s ease-out both;
}

.sp-solution::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s;
    box-shadow: 0 0 8px var(--neon-glow);
}

.sp-solution:hover::before {
    transform: scaleX(1);
}

.sp-solution:hover {
    transform: translateY(-3px);
    border-color: rgba(34, 111, 65, 0.15);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3), 0 0 15px rgba(34, 111, 65, 0.05);
}

.sp-solution-header {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.6rem;
}

.sp-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.sp-avatar-initial {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient);
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    flex-shrink: 0;
}

.sp-author {
    font-weight: 600;
    font-size: 0.9rem;
    color: #fff;
}

.sp-desc {
    color: var(--text);
    font-size: 0.88rem;
    margin-bottom: 0.6rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sp-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.sp-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0.6rem;
    border-top: 1px solid var(--border-subtle);
}

.sp-stats {
    display: flex;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
}

.sp-stats span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.sp-view-link {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--neon);
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: all 0.25s;
}

.sp-view-link:hover {
    gap: 0.5rem;
    text-shadow: 0 0 8px var(--neon-glow);
}

/* ===== SCROLL REVEAL ===== */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

.cards-grid .reveal-on-scroll:nth-child(1) { transition-delay: 0s; }
.cards-grid .reveal-on-scroll:nth-child(2) { transition-delay: 0.08s; }
.cards-grid .reveal-on-scroll:nth-child(3) { transition-delay: 0.16s; }
.cards-grid .reveal-on-scroll:nth-child(4) { transition-delay: 0.24s; }
.cards-grid .reveal-on-scroll:nth-child(5) { transition-delay: 0.32s; }
.cards-grid .reveal-on-scroll:nth-child(6) { transition-delay: 0.4s; }
.cards-grid .reveal-on-scroll:nth-child(n+7) { transition-delay: 0.48s; }

/* ===== GRADIENT SHIMMER ON HERO TEXT ===== */
.hero h1 span {
    background: linear-gradient(90deg, #226f41 0%, #2E9B5A 25%, #34D399 50%, #2E9B5A 75%, #226f41 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShimmer 3s linear infinite;
}

@keyframes gradientShimmer {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

/* ===== NAVBAR BRAND GLOW ===== */
.navbar-brand span {
    background: linear-gradient(90deg, #226f41 0%, #2E9B5A 40%, #226f41 80%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShimmer 4s linear infinite;
}

/* ===== FLOATING BADGE PULSE ===== */
.badge-beginner, .badge-intermediate, .badge-advanced {
    animation: neonPulse 2.5s ease-in-out infinite;
}

@keyframes neonPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(34, 111, 65, 0.15) !important; }
    50% { box-shadow: 0 0 10px 3px rgba(34, 111, 65, 0.08) !important; }
}

/* ===== CARD GLOW ON HOVER ===== */
.card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius);
    background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(34, 111, 65, 0.04), transparent 40%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s;
}

.card:hover::after {
    opacity: 1;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes floatUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes shimmer {
    0% { background-position: -200% center; }
    100% { background-position: 200% center; }
}

@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes authEntrance {
    from { opacity: 0; transform: translateY(40px) scale(0.95) rotateX(5deg); }
    to { opacity: 1; transform: translateY(0) scale(1) rotateX(0deg); }
}

@keyframes modalSlideUp {
    from { opacity: 0; transform: translateY(30px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes heartPop {
    0% { transform: scale(1); }
    25% { transform: scale(1.3); }
    50% { transform: scale(0.9); }
    75% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes rippleExpand {
    to { transform: scale(1); opacity: 0; }
}

@keyframes borderGlow {
    0%, 100% { border-color: rgba(34, 111, 65, 0.15); }
    50% { border-color: rgba(34, 111, 65, 0.35); }
}

@keyframes subtleFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

@keyframes statPulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(46, 155, 90, 0.3); }
    50% { transform: scale(1.03); box-shadow: 0 0 16px 4px rgba(46, 155, 90, 0.15); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(46, 155, 90, 0); }
}

/* ===== WORD REVEAL ===== */
.word-reveal {
    display: inline-block;
    opacity: 0;
    transform: translateY(15px);
    animation: wordPop 0.5s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes wordPop {
    from { opacity: 0; transform: translateY(15px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== ENHANCED CARD HOVER GLOW ===== */
.solution-card::after,
.offer-card::after,
.sp-solution::after,
.stat-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius);
    background: radial-gradient(500px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(34, 111, 65, 0.06), transparent 40%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s;
}

.solution-card:hover::after,
.offer-card:hover::after,
.sp-solution:hover::after,
.stat-card:hover::after {
    opacity: 1;
}

.solution-card,
.offer-card,
.sp-solution,
.stat-card {
    position: relative;
    overflow: hidden;
}

/* ===== ANIMATED GRADIENT BORDER ON FOCUS INPUTS ===== */
.form-control {
    position: relative;
}

.form-control:focus {
    border-image: linear-gradient(135deg, var(--neon), #2E9B5A, var(--neon)) 1;
    border-image-slice: 1;
    animation: borderGlow 2s ease-in-out infinite;
}

/* ===== SMOOTH SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: rgba(34, 111, 65, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(34, 111, 65, 0.5);
}

/* ===== FLOATING ANIMATION ON EMPTY STATE ICON ===== */
.empty-state-icon {
    animation: subtleFloat 3s ease-in-out infinite;
}

/* ===== STAGGER ANIMATION FOR CARD TAGS ===== */
.card-tags .tag {
    opacity: 0;
    animation: fadeInUp 0.3s ease-out both;
}
.card-tags .tag:nth-child(1) { animation-delay: 0.05s; }
.card-tags .tag:nth-child(2) { animation-delay: 0.1s; }
.card-tags .tag:nth-child(3) { animation-delay: 0.15s; }
.card-tags .tag:nth-child(4) { animation-delay: 0.2s; }
.card-tags .tag:nth-child(5) { animation-delay: 0.25s; }

/* ===== LOADING SPINNER GLOW ===== */
.spinner {
    box-shadow: 0 0 15px rgba(34, 111, 65, 0.2);
}

/* ===== HOVER STATE FOR NAVBAR LINKS ===== */
.navbar-links a,
.navbar-links button {
    position: relative;
    overflow: hidden;
}

.navbar-links a::before,
.navbar-links button::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(-50%);
    box-shadow: 0 0 8px rgba(34, 111, 65, 0.3);
}

.navbar-links a:hover::before,
.navbar-links button:hover::before {
    width: 60%;
}

/* ===== SMOOTH CATEGORY PILL TRANSITIONS ===== */
.category-btn {
    position: relative;
    overflow: hidden;
}

.category-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient);
    opacity: 0;
    transition: opacity 0.3s;
    z-index: -1;
}

.category-btn.active::after {
    opacity: 1;
}

/* ===== TOAST SLIDE + GLOW ===== */
.toast {
    backdrop-filter: blur(8px);
}

.toast-success {
    border: 1px solid rgba(34, 111, 65, 0.3);
}

/* ===== PODIUM FLOATING ===== */
.lb-podium-item {
    animation: floatUp 0.6s ease-out both, subtleFloat 4s ease-in-out 1s infinite;
}

.lb-podium-1 {
    animation: floatUp 0.6s ease-out both, subtleFloat 3.5s ease-in-out 1s infinite;
}

/* ===== HOVER LINE EXPAND ON SOLUTION REPO ===== */
.solution-repo {
    position: relative;
    overflow: hidden;
}

.solution-repo::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gradient);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.solution-repo:hover::after {
    width: 100%;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .navbar { padding: 0 1rem; }
    .hero h1 { font-size: 1.8rem; }
    .cards-grid { grid-template-columns: 1fr; }
    .container { padding: 1rem; }
    .problem-detail-title { font-size: 1.4rem; }
    .detail-layout { flex-direction: column; }
    .top-solutions-panel { width: 100%; }
    .top-solutions-card { position: static; max-height: 50vh; }
}

@media (max-width: 480px) {
    .navbar-links a, .navbar-links button {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }
    .filter-toggle { padding: 0.4rem 0.9rem; font-size: 0.8rem; }
    .search-bar { margin-bottom: 1rem; }
    .category-filters { gap: 0.4rem; }
    .category-btn { padding: 0.35rem 0.8rem; font-size: 0.75rem; }
    .lb-podium { flex-direction: column; align-items: center; gap: 1rem; }
    .lb-podium-item { width: 100% !important; order: unset !important; }
    .lb-podium-1 { order: -1 !important; }
    .lb-table-header, .lb-table-row {
        grid-template-columns: 50px 1fr 80px 100px;
        padding: 0.7rem 1rem;
        font-size: 0.82rem;
    }
}

/* ===== SEARCH BAR ===== */
.search-bar {
    position: relative;
    margin-bottom: 1.5rem;
    background: var(--bg-card);
    border-radius: 50px;
    overflow: hidden;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 0.85rem 1rem 0.85rem 2.75rem;
    border: 1px solid var(--border-subtle);
    border-radius: 50px;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text);
    background: var(--bg-card);
    transition: all 0.35s;
}

.search-input:focus {
    outline: none;
    border-color: var(--neon);
    box-shadow: 0 0 0 3px rgba(34, 111, 65, 0.08), 0 0 20px rgba(34, 111, 65, 0.06);
}

.search-input::placeholder {
    color: var(--text-light);
}

/* ===== CATEGORY FILTERS ===== */
.category-filters {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    padding-bottom: 0.5rem;
    overflow-x: auto;
}

.category-btn {
    padding: 0.45rem 1rem;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    border-radius: 50px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.3s;
    font-family: inherit;
    white-space: nowrap;
}

.category-btn:hover {
    border-color: var(--neon);
    color: var(--neon);
    transform: translateY(-1px);
}

.category-btn.active {
    background: var(--neon);
    border-color: var(--neon);
    color: #000;
    box-shadow: 0 4px 15px rgba(34, 111, 65, 0.25);
    transform: scale(1.05);
}

/* ===== CATEGORY BADGE ON CARDS ===== */
.category-badge {
    display: inline-block;
    background: var(--bg-elevated);
    color: var(--text-light);
    padding: 0.2rem 0.7rem;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid var(--border-subtle);
}

.category-badge:hover {
    background: var(--neon);
    color: #000;
    box-shadow: 0 0 15px rgba(34, 111, 65, 0.2);
    transform: scale(1.08);
}

/* ===== CREDITS BADGE ===== */
.credits-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--warning);
    font-weight: 600;
    font-size: 0.8rem;
}

.credits-badge svg {
    color: var(--warning);
}

/* ===== LEADERBOARD TAB TOGGLE ===== */
.lb-tab-wrapper {
    display: flex;
    justify-content: center;
    padding: 2.5rem 0 2rem;
}

.lb-tab-toggle {
    display: flex;
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 4px;
}

.lb-tab {
    padding: 0.55rem 2rem;
    border: none;
    background: transparent;
    color: var(--text-muted);
    border-radius: 50px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    position: relative;
    z-index: 2;
    transition: color 0.3s;
}

.lb-tab.active {
    color: #000;
}

.lb-tab:not(.active):hover {
    color: var(--text-light);
}

.lb-tab-slider {
    position: absolute;
    top: 4px;
    height: calc(100% - 8px);
    background: var(--gradient);
    border-radius: 50px;
    transition: left 0.35s cubic-bezier(0.4, 0, 0.2, 1), width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1;
    box-shadow: 0 4px 20px rgba(34, 111, 65, 0.3);
}

/* ===== PODIUM ===== */
.lb-podium {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 1rem;
    padding: 1rem 0 2.5rem;
}

.lb-podium-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 1.5rem 1.2rem 1.2rem;
    width: 220px;
    position: relative;
    transition: all 0.4s;
    animation: floatUp 0.6s ease-out both;
}

.lb-podium-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 25px rgba(34, 111, 65, 0.05);
}

.lb-podium-empty {
    opacity: 0.2;
    pointer-events: none;
}

.lb-podium-1 {
    order: 2;
    padding-top: 2rem;
    padding-bottom: 1.5rem;
    border-color: rgba(255, 215, 0, 0.25);
    z-index: 2;
    /* Spotlight cone from above */
    background:
        radial-gradient(ellipse 120% 80% at 50% -20%, rgba(255, 215, 0, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 80% 50% at 50% -10%, rgba(255, 215, 0, 0.06) 0%, transparent 50%),
        var(--bg-card);
    box-shadow:
        0 8px 30px rgba(255, 215, 0, 0.08),
        0 0 60px rgba(255, 215, 0, 0.06),
        inset 0 1px 0 rgba(255, 215, 0, 0.1);
    animation: floatUp 0.6s ease-out both, spotlightPulse 3s ease-in-out infinite;
}

.lb-podium-1::before {
    content: '';
    position: absolute;
    top: -60px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 60px;
    background: linear-gradient(to bottom, transparent, rgba(255, 215, 0, 0.3));
    pointer-events: none;
}

.lb-podium-1::after {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 140%;
    height: 120%;
    background: radial-gradient(ellipse at 50% 0%, rgba(255, 215, 0, 0.07) 0%, transparent 55%);
    pointer-events: none;
    z-index: -1;
}

@keyframes spotlightPulse {
    0%, 100% {
        box-shadow:
            0 8px 30px rgba(255, 215, 0, 0.08),
            0 0 60px rgba(255, 215, 0, 0.04),
            inset 0 1px 0 rgba(255, 215, 0, 0.08);
    }
    50% {
        box-shadow:
            0 8px 40px rgba(255, 215, 0, 0.14),
            0 0 80px rgba(255, 215, 0, 0.08),
            inset 0 1px 0 rgba(255, 215, 0, 0.15);
    }
}

.lb-podium-1 .lb-podium-avatar,
.lb-podium-1 .lb-podium-avatar-initial {
    width: 88px;
    height: 88px;
    font-size: 2rem;
    border: 3px solid #FFD700;
    box-shadow: 0 0 25px rgba(255, 215, 0, 0.2);
}

.lb-podium-2 { order: 1; border-color: rgba(192, 192, 192, 0.15); }
.lb-podium-3 { order: 3; border-color: rgba(205, 127, 50, 0.15); }

.lb-podium-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 0.6rem;
    border: 3px solid var(--border-subtle);
}

.lb-podium-avatar-initial {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--gradient);
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    border: 3px solid var(--border-subtle);
}

.lb-podium-2 .lb-podium-avatar,
.lb-podium-2 .lb-podium-avatar-initial {
    border-color: #C0C0C0;
    box-shadow: 0 0 15px rgba(192, 192, 192, 0.1);
}

.lb-podium-3 .lb-podium-avatar,
.lb-podium-3 .lb-podium-avatar-initial {
    border-color: #CD7F32;
    box-shadow: 0 0 15px rgba(205, 127, 50, 0.1);
}

.lb-podium-name {
    font-weight: 700;
    font-size: 1rem;
    color: #fff;
    margin-bottom: 0.6rem;
}

.lb-podium-1 .lb-podium-name { font-size: 1.15rem; }

.trophy-icon { width: 36px; height: 36px; margin-bottom: 0.3rem; }
.lb-podium-1 .trophy-icon {
    width: 44px;
    height: 44px;
    filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.4));
}

.lb-podium-stats {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
}

.lb-podium-credits {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--neon);
    text-shadow: 0 0 10px var(--neon-glow);
}

.lb-podium-1 .lb-podium-credits { font-size: 1.6rem; }

.lb-podium-credits-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-top: 0.15rem;
}

/* ===== LEADERBOARD TABLE ===== */
.lb-table {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 2rem;
}

.lb-table-header {
    display: grid;
    grid-template-columns: 70px 1fr 120px 120px;
    padding: 0.85rem 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lb-table-row {
    display: grid;
    grid-template-columns: 70px 1fr 120px 120px;
    padding: 0.85rem 1.5rem;
    align-items: center;
    border-bottom: 1px solid var(--border-subtle);
    transition: all 0.25s;
    animation: floatUp 0.4s ease-out both;
}

.lb-table-row:last-child { border-bottom: none; }
.lb-table-row:hover { background: rgba(34, 111, 65, 0.03); }

.lb-col-rank { font-weight: 700; color: var(--text-light); font-size: 0.95rem; }
.lb-col-user { display: flex; align-items: center; gap: 0.75rem; }

.lb-table-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.lb-table-avatar-initial {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient);
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    flex-shrink: 0;
}

.lb-table-name { font-weight: 600; color: #fff; font-size: 0.92rem; }
.lb-col-solutions { text-align: center; color: var(--text); font-weight: 600; }

.lb-col-credits {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.95rem;
    color: var(--neon);
}

.lb-col-credits strong { font-weight: 800; }

/* ===== OFFERS ===== */
.offers-hero {
    text-align: center;
    padding: 3rem 1rem 1.5rem;
}

.offers-hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #fff;
    animation: fadeInDown 0.6s ease-out;
}

.offers-hero h1 span {
    color: var(--neon);
    text-shadow: 0 0 15px var(--neon-glow);
}

.offers-hero p {
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.6s ease-out 0.15s both;
}

.user-credits-display {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(34, 111, 65, 0.1);
    color: var(--neon);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    animation: scaleIn 0.5s ease-out 0.3s both;
    border: 1px solid rgba(34, 111, 65, 0.2);
    box-shadow: 0 0 20px rgba(34, 111, 65, 0.1);
}

.credits-icon {
    color: var(--neon);
    display: flex;
}

.offers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.offer-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: all 0.4s;
    animation: floatUp 0.5s ease-out both;
}

.offer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--border-subtle);
}

.offer-redeemable::before {
    background: var(--gradient);
    box-shadow: 0 0 10px var(--neon-glow);
}

.offer-redeemable {
    border-color: rgba(34, 111, 65, 0.15);
}

.offer-redeemable:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 25px rgba(34, 111, 65, 0.08);
    border-color: rgba(34, 111, 65, 0.25);
}

.offer-locked { opacity: 0.5; }
.offer-locked:hover { opacity: 0.7; transform: translateY(-3px); }

.offer-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
    gap: 0.5rem;
}

.offer-title { font-size: 1.05rem; font-weight: 700; color: #fff; flex: 1; }

.offer-credits-req {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--warning);
    font-weight: 700;
    font-size: 0.85rem;
    white-space: nowrap;
}

.offer-desc {
    color: var(--text);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.offer-footer { display: flex; align-items: center; }

.offer-locked-text {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
}

.offer-admin-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--warning);
    font-size: 0.85rem;
    font-weight: 600;
}

.offer-glow {
    position: absolute;
    inset: 0;
    border-radius: var(--radius);
    background: radial-gradient(circle at 50% 0%, rgba(34, 111, 65, 0.04), transparent 70%);
    pointer-events: none;
}

/* ===== SOLUTION SCREENSHOTS ===== */
.solution-screenshots {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    padding: 0.5rem 0;
}

.solution-screenshot {
    width: 120px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    cursor: pointer;
    transition: all 0.3s;
}

.solution-screenshot:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4), 0 0 10px rgba(34, 111, 65, 0.1);
    border-color: var(--neon);
}

.screenshot-upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-align: center;
    transition: all 0.3s;
    background: var(--bg-elevated);
}

.screenshot-upload-area:hover {
    border-color: var(--neon);
    box-shadow: 0 0 15px rgba(34, 111, 65, 0.05);
}

.screenshot-previews {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1rem;
    justify-content: center;
}

.screenshot-preview {
    position: relative;
    display: inline-block;
}

.screenshot-preview img {
    width: 100px;
    height: 70px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
}

.screenshot-remove {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--danger);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    box-shadow: 0 0 10px rgba(255, 59, 92, 0.3);
    transition: all 0.2s;
}

.screenshot-remove:hover {
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(255, 59, 92, 0.5);
}

.screenshot-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 500;
    animation: fadeIn 0.3s ease;
    cursor: pointer;
    backdrop-filter: blur(10px);
}

.screenshot-lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    cursor: default;
}

.screenshot-lightbox-content img {
    max-width: 90vw;
    max-height: 85vh;
    border-radius: var(--radius);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.6), 0 0 15px rgba(34, 111, 65, 0.1);
}

.screenshot-lightbox-close {
    position: absolute;
    top: -12px;
    right: -12px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-elevated);
    color: var(--neon);
    border: 1px solid var(--border);
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
    transition: all 0.25s;
}

.screenshot-lightbox-close:hover {
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(34, 111, 65, 0.2);
}

/* ===== THEME TOGGLE SWITCH — SCENIC ===== */
.theme-toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 0.2rem;
    border-radius: 50px;
    user-select: none;
    flex-shrink: 0;
}

.theme-toggle-track {
    width: 56px;
    height: 28px;
    border-radius: 14px;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: inset 0 1px 4px rgba(0,0,0,0.35);
    transition: box-shadow 0.4s;
}

.theme-toggle:hover .theme-toggle-track {
    box-shadow: inset 0 1px 4px rgba(0,0,0,0.35), 0 0 10px rgba(34,111,65,0.25);
}

/* ---- Dark scene (night mountains) ---- */
.theme-toggle-scene {
    position: absolute;
    inset: 0;
    transition: opacity 0.5s ease;
}

.theme-toggle-scene--dark {
    background: linear-gradient(180deg, #0b1026 0%, #162044 40%, #1a3060 70%, #1e3a6e 100%);
    opacity: 1;
}

.scene-mountains {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 16px;
    background:
        linear-gradient(135deg, transparent 30%, #1a2a50 30%, #1a2a50 50%, transparent 50%) -5px bottom / 18px 14px no-repeat,
        linear-gradient(225deg, transparent 30%, #15234a 30%, #15234a 50%, transparent 50%) 6px bottom / 20px 16px no-repeat,
        linear-gradient(135deg, transparent 30%, #1e3060 30%, #1e3060 50%, transparent 50%) 18px bottom / 16px 11px no-repeat,
        linear-gradient(225deg, transparent 30%, #1a2a55 30%, #1a2a55 50%, transparent 50%) 28px bottom / 22px 14px no-repeat,
        linear-gradient(135deg, transparent 30%, #162850 30%, #162850 50%, transparent 50%) 40px bottom / 14px 10px no-repeat;
}

.scene-stars span {
    position: absolute;
    width: 1.5px;
    height: 1.5px;
    background: #fff;
    border-radius: 50%;
    animation: starTwinkle 2s ease-in-out infinite alternate;
}

.scene-stars span:nth-child(2) { animation-delay: 0.4s; }
.scene-stars span:nth-child(3) { animation-delay: 0.8s; }
.scene-stars span:nth-child(4) { animation-delay: 1.2s; }
.scene-stars span:nth-child(5) { animation-delay: 0.2s; }

@keyframes starTwinkle {
    0% { opacity: 0.3; }
    100% { opacity: 1; }
}

/* ---- Light scene (sunset landscape) ---- */
.theme-toggle-scene--light {
    background: linear-gradient(180deg, #87CEEB 0%, #f6d365 50%, #fda085 80%, #e8834a 100%);
    opacity: 0;
}

.scene-sun-sky {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,230,100,0.6) 0%, transparent 70%);
    top: 2px;
    right: 12px;
}

.scene-hills {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 14px;
    background:
        radial-gradient(ellipse 24px 12px at 8px 14px, #3a7d44 0%, transparent 100%),
        radial-gradient(ellipse 30px 14px at 28px 14px, #2d6a30 0%, transparent 100%),
        radial-gradient(ellipse 20px 10px at 46px 14px, #3a7d44 0%, transparent 100%);
}

.scene-trees {
    position: absolute;
    bottom: 4px;
    left: 4px;
    width: 20px;
    height: 12px;
    background:
        linear-gradient(to top, transparent 0%, #1a5c28 100%) 0px 2px / 2px 8px no-repeat,
        conic-gradient(from 210deg at 1px 2px, #1a5c28 60deg, transparent 60deg) -1px 0px / 4px 5px no-repeat,
        linear-gradient(to top, transparent 0%, #1a5c28 100%) 6px 4px / 1.5px 6px no-repeat,
        conic-gradient(from 210deg at 1px 2px, #1a5c28 60deg, transparent 60deg) 5px 2px / 3px 4px no-repeat;
}

/* ---- Theme switch: flip scenes ---- */
[data-theme="light"] .theme-toggle-scene--dark {
    opacity: 0;
}

[data-theme="light"] .theme-toggle-scene--light {
    opacity: 1;
}

/* ---- Thumb (sun/moon ball) ---- */
.theme-toggle-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    position: absolute;
    top: 3px;
    left: 3px;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1), background 0.4s, box-shadow 0.4s;
    background: linear-gradient(145deg, #c0cfe0, #8ba4c8);
    box-shadow: 0 1px 6px rgba(0,0,0,0.3), inset 0 -1px 2px rgba(0,0,0,0.15);
    color: #e8eef7;
}

.thumb-icon {
    transition: opacity 0.3s, transform 0.3s;
    position: absolute;
}

.thumb-icon--moon {
    opacity: 1;
    transform: rotate(0deg);
}

.thumb-icon--sun {
    opacity: 0;
    transform: rotate(-90deg);
}

/* ---- Light theme: slide thumb right, become sun ---- */
[data-theme="light"] .theme-toggle-thumb {
    transform: translateX(28px);
    background: linear-gradient(145deg, #ffdd57, #f7b733);
    box-shadow: 0 1px 8px rgba(247,183,51,0.5), 0 0 16px rgba(255,221,87,0.3), inset 0 -1px 2px rgba(200,140,0,0.2);
    color: #f5a623;
}

[data-theme="light"] .thumb-icon--moon {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="light"] .thumb-icon--sun {
    opacity: 1;
    transform: rotate(0deg);
    color: #fff;
}

/* ===== LIGHT THEME OVERRIDES ===== */
[data-theme="light"] body {
    background: var(--bg);
    color: var(--text);
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.9);
    border-bottom-color: var(--border-subtle);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .navbar-brand {
    color: #1a1a2e;
}

[data-theme="light"] .hero h1 {
    color: #1a1a2e;
}

[data-theme="light"] .card {
    background: var(--bg-card);
    border-color: var(--border-subtle);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .card:hover {
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1), 0 0 20px rgba(26, 122, 58, 0.06);
    border-color: rgba(26, 122, 58, 0.2);
}

[data-theme="light"] .solution-card {
    background: var(--bg-card);
    border-color: var(--border-subtle);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .modal {
    background: var(--bg-card);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .modal-overlay {
    background: rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .form-control {
    background: var(--bg-elevated);
    border-color: var(--border-subtle);
    color: var(--text);
}

[data-theme="light"] .form-control:focus {
    border-color: var(--neon);
    box-shadow: 0 0 0 3px rgba(26, 122, 58, 0.1);
}

[data-theme="light"] .btn-primary {
    box-shadow: 0 4px 15px rgba(26, 122, 58, 0.2);
}

[data-theme="light"] .filter-toggle {
    background: var(--bg-card);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .filter-menu {
    background: var(--bg-card);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    border-color: var(--border-subtle);
}

[data-theme="light"] .category-btn {
    background: var(--bg-card);
    border-color: var(--border-subtle);
    color: var(--text-light);
}

[data-theme="light"] .search-bar {
    background: var(--bg-card);
    border-color: var(--border-subtle);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .top-solutions-card {
    background: var(--bg-card);
    border-color: var(--border-subtle);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .sp-solution {
    background: var(--bg-elevated);
    border-color: var(--border-subtle);
}

[data-theme="light"] .toast-success {
    background: #1a7a3a;
    color: #fff;
}

[data-theme="light"] .toast-error {
    background: #dc2f4a;
    color: #fff;
}

[data-theme="light"] .btn-bookmark {
    background: rgba(34, 111, 65, 0.06);
    border-color: var(--neon);
    color: var(--neon);
}

[data-theme="light"] .btn-bookmark:hover {
    background: rgba(26, 122, 58, 0.08);
}

[data-theme="light"] .btn-save-problem {
    background: var(--bg-card);
    border-color: var(--border-subtle);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .comments-section {
    background: var(--bg-elevated);
}

[data-theme="light"] .comment-item {
    border-color: var(--border-subtle);
}

[data-theme="light"] ::selection {
    background: rgba(26, 122, 58, 0.15);
    color: #1a1a2e;
}

[data-theme="light"] .navbar-links .btn-nav-outline {
    border-color: rgba(26, 122, 58, 0.3);
    background: rgba(26, 122, 58, 0.05);
}

[data-theme="light"] .profile-section-header h2,
[data-theme="light"] .profile-info h2 {
    color: #1a1a2e;
}

[data-theme="light"] .screenshot-lightbox {
    background: rgba(0, 0, 0, 0.6);
}

/* --- Fix all hardcoded #fff text for light backgrounds --- */
[data-theme="light"] .navbar-brand {
    color: #1a1a2e;
}

[data-theme="light"] .hero h1,
[data-theme="light"] .submissions-hero h1,
[data-theme="light"] .offers-hero h1 {
    color: #1a1a2e;
}

[data-theme="light"] .card-title {
    color: #1a1a2e;
}

[data-theme="light"] .modal-header h2 {
    color: #1a1a2e;
}

[data-theme="light"] .solution-author,
[data-theme="light"] .sp-author,
[data-theme="light"] .comment-author {
    color: #1a1a2e;
}

[data-theme="light"] .problem-detail-title,
[data-theme="light"] .solutions-header h2 {
    color: #1a1a2e;
}

[data-theme="light"] .profile-name {
    color: #1a1a2e;
}

[data-theme="light"] .lb-podium-name,
[data-theme="light"] .lb-table-name {
    color: #1a1a2e;
}

[data-theme="light"] .offer-title {
    color: #1a1a2e;
}

[data-theme="light"] .saved-page-title {
    color: #1a1a2e;
}

[data-theme="light"] .lb-podium-item {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .lb-podium-item:hover {
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .lb-table {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .offer-redeemable:hover {
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1), 0 0 15px rgba(26, 122, 58, 0.06);
}

[data-theme="light"] .offer-card {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .lb-tab-toggle {
    background: var(--bg-card);
    border-color: var(--border-subtle);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .comment-avatar-initial,
[data-theme="light"] .solution-avatar-initial,
[data-theme="light"] .sp-avatar-initial,
[data-theme="light"] .lb-podium-avatar-initial,
[data-theme="light"] .lb-table-avatar-initial {
    color: #fff;
}