/* ---- Skip-to-content (accessibility) ---- */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary, #4361ee);
    color: #fff;
    padding: 8px 16px;
    z-index: 100000;
    font-size: 14px;
    text-decoration: none;
    border-radius: 0 0 4px 0;
    transition: top 0.2s;
}
.skip-to-content:focus {
    top: 0;
}

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

/* ---- Loading Screen ---- */
#loading-screen {
    position: fixed; inset: 0; z-index: 99999;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg);
    overflow: hidden;
    opacity: 0; animation: loaderScreenIn 0.6s ease forwards;
}
@keyframes loaderScreenIn { to { opacity: 1; } }
#loading-screen.fade-out { opacity: 0; visibility: hidden; pointer-events: none; transition: opacity 0.6s ease, visibility 0.6s ease; }
body.dark-mode #loading-screen { background: #1a1a2e; }

.loader-bg {
    position: absolute; inset: 0;
    background-size: cover; background-position: center;
    filter: blur(24px) brightness(0.85);
    transform: scale(1.1); /* prevent blur white edges */
    transition: filter 1.2s ease-out, transform 1.2s ease-out;
}
#loading-screen.unblur .loader-bg {
    filter: blur(0px) brightness(1);
    transform: scale(1);
}
body.dark-mode .loader-bg { filter: blur(24px) brightness(0.5); }
body.dark-mode #loading-screen.unblur .loader-bg { filter: blur(0px) brightness(0.7); }

.loader-content {
    text-align: center; position: relative; z-index: 1;
    background: rgba(255,255,255,0.75); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border-radius: 24px; padding: 40px 48px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}
body.dark-mode .loader-content {
    background: rgba(22,33,62,0.8);
}

.loader-icon { margin-bottom: 20px; }
.loader-book { width: 64px; height: 64px; color: var(--primary); }
.book-group { animation: loaderPulse 1.8s ease-in-out infinite; transform-origin: center; }
.book-lines-left { animation: loaderWrite 1.4s ease-in-out infinite; }
.book-lines-right { animation: loaderWrite 1.4s ease-in-out 0.3s infinite; }

@keyframes loaderPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.06); }
}
@keyframes loaderWrite {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.loader-title {
    font-size: 2.2rem; font-weight: 800; letter-spacing: -0.02em;
    color: var(--primary); margin-bottom: 24px;
    display: flex; gap: 10px; justify-content: center;
}
.loader-word {
    display: inline-block;
    opacity: 0; transform: translateY(16px);
    animation: loaderWordIn 0.5s ease forwards;
    animation-delay: calc(var(--i) * 0.15s + 0.2s);
}
@keyframes loaderWordIn {
    to { opacity: 1; transform: translateY(0); }
}

.loader-bar-track {
    width: 200px; height: 4px; margin: 0 auto 16px;
    background: rgba(67, 97, 238, 0.15); border-radius: 4px;
    overflow: hidden;
}
.loader-bar-fill {
    width: 0%; height: 100%; border-radius: 4px;
    background: linear-gradient(90deg, var(--primary), #a855f7);
    animation: loaderProgress 1.6s ease-in-out forwards;
}
@keyframes loaderProgress {
    0% { width: 0%; }
    40% { width: 60%; }
    80% { width: 85%; }
    100% { width: 100%; }
}

.loader-tip {
    font-size: 0.85rem; color: var(--text-light);
    max-width: 320px; margin: 0 auto; line-height: 1.5;
    opacity: 0; animation: loaderFadeIn 0.4s ease 0.6s forwards;
}
@keyframes loaderFadeIn { to { opacity: 1; } }

/* ---- Hide signed-in-only elements until auth resolves ---- */
.signed-in-only { display: none; }

/* ---- Staggered page entrance ---- */
.hub-topbar, .hub-hero, .exam-banner, .resume-section, .hub-stats-grid, .hub-footer, .exam-countdown, .countdown-show-btn {
    opacity: 0; transform: translateY(20px);
}
.entrance-visible {
    opacity: 1 !important; transform: translateY(0) !important;
    transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---- Hero section (signed-out visitors) ---- */
.hub-hero {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 32px;
    padding: 40px 24px 32px;
}
.hub-hero-title {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 12px;
    line-height: 1.2;
}
.hub-hero-subtitle {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 24px;
}
.hub-hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}
.hub-hero-btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 28px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
}
.hub-hero-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}
.hub-hero-btn.primary {
    background: var(--primary);
    color: #fff;
}
.hub-hero-btn.secondary {
    background: var(--card);
    color: var(--text);
    box-shadow: var(--shadow);
}
body.dark-mode .hub-hero-btn.secondary {
    background: rgba(255,255,255,0.08);
    color: #e0e0e0;
}

:root {
    --primary: #4361ee;
    --primary-light: #eef0ff;
    --bg: #f0f2f5;
    --card: #ffffff;
    --text: #2b2d42;
    --text-light: #6c757d;
    --radius: 16px;
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
    --success: #06d6a0;
    --success-light: #e6faf4;
    --error: #ef476f;
    --error-light: #fde8ed;
    --warning: #f39c12;
    --warning-light: #fef5e7;
    --border: #e0e0e0;
    --border-light: #f0f0f0;
    --bg-subtle: #f8f9fa;
    --color-brand: #534AB7;
    --color-brand-light: #EEEDFE;
    --color-science: #1D9E75;
    --color-humanities: #D85A30;
    --color-arts: #BA7517;
    --color-correct: #1D9E75;
    --color-incorrect: #E24B4A;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    padding: 20px;
}

#app { max-width: 720px; margin: 0 auto; }

/* ---- Legacy Header (hidden, kept for JS compat) ---- */
.hub-header {
    display: none;
}

/* ---- Top Bar ---- */
.hub-topbar {
    position: sticky; top: 0; z-index: 1000;
    display: flex; align-items: center; justify-content: space-between;
    height: 52px; padding: 0 16px;
    background: var(--card); border-bottom: 0.5px solid var(--border);
    margin: -20px -20px 20px;
}
body.has-bg .hub-topbar { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.dark-mode .hub-topbar { background: var(--card); border-bottom-color: rgba(255,255,255,0.06); }
body.dark-mode.has-bg .hub-topbar { background: rgba(22,33,62,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }

.topbar-brand {
    font-size: 15px; font-weight: 700; color: var(--text);
    text-decoration: none; letter-spacing: -0.01em;
}
.topbar-56 { color: var(--color-brand); }

.topbar-right {
    display: flex; align-items: center; gap: 12px;
}

.topbar-streak {
    display: flex; align-items: center; gap: 3px;
    font-size: 13px; font-weight: 600; color: var(--text);
    cursor: default;
}
.topbar-streak-flame { font-size: 16px; line-height: 1; }
.topbar-streak-count { min-width: 14px; }

.topbar-avatar-wrap { position: relative; }
.topbar-avatar {
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--color-brand); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 600; cursor: pointer;
    transition: box-shadow 0.15s;
    overflow: hidden;
}
.topbar-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.topbar-avatar:hover { box-shadow: 0 0 0 2px var(--color-brand); }

.topbar-dropdown {
    display: none; position: absolute; right: 0; top: calc(100% + 8px);
    background: var(--card); border-radius: 12px; box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    min-width: 200px; padding: 6px 0; z-index: 1001;
    border: 0.5px solid var(--border);
}
.topbar-dropdown.show { display: block; }
body.dark-mode .topbar-dropdown { background: var(--card); border-color: rgba(255,255,255,0.08); }
body.has-bg .topbar-dropdown { background: rgba(255,255,255,0.95); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.dark-mode.has-bg .topbar-dropdown { background: rgba(22,33,62,0.95); }

.topbar-dd-item {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 16px; font-size: 13px; font-weight: 500;
    color: var(--text); text-decoration: none; cursor: pointer;
    transition: background 0.12s; border: none; background: none;
    width: 100%; text-align: left; font-family: inherit;
}
.topbar-dd-item:hover { background: rgba(0,0,0,0.04); }
body.dark-mode .topbar-dd-item:hover { background: rgba(255,255,255,0.05); }
.topbar-dd-item svg { opacity: 0.6; flex-shrink: 0; }

.topbar-dd-sep { height: 1px; background: var(--border); margin: 4px 12px; }
body.dark-mode .topbar-dd-sep { background: rgba(255,255,255,0.08); }

.topbar-dd-signout { color: var(--error); }
.topbar-dd-signout:hover { background: rgba(239,71,111,0.06); }

/* ---- Exam Banner ---- */
.exam-banner {
    display: flex; align-items: center; justify-content: space-between;
    background: var(--color-brand-light); border: 0.5px solid #AFA9EC;
    border-radius: 12px; padding: 14px 16px; margin-bottom: 16px;
    gap: 12px;
}
.exam-banner-left { display: flex; align-items: center; gap: 10px; }
.exam-banner-icon {
    width: 28px; height: 28px; border-radius: 8px; background: #AFA9EC;
    display: flex; align-items: center; justify-content: center;
    font-size: 14px; flex-shrink: 0;
}
.exam-banner-text { display: flex; flex-direction: column; gap: 1px; }
.exam-banner-title { font-size: 13px; font-weight: 500; color: #3C3489; }
.exam-banner-sub { font-size: 11px; color: var(--color-brand); }
.exam-banner-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.exam-banner-days { font-size: 22px; font-weight: 500; color: #3C3489; line-height: 1; }
.exam-banner-days-label { font-size: 11px; color: var(--color-brand); }
.exam-banner-edit {
    background: none; border: none; cursor: pointer; font-size: 14px;
    color: var(--color-brand); padding: 4px; opacity: 0.6;
    transition: opacity 0.15s;
}
.exam-banner-edit:hover { opacity: 1; }
body.dark-mode .exam-banner { background: rgba(83,74,183,0.12); border-color: rgba(175,169,236,0.3); }
body.dark-mode .exam-banner-title { color: #c4bff0; }
body.dark-mode .exam-banner-sub { color: #a09be0; }
body.dark-mode .exam-banner-days { color: #d4d0f4; }
body.dark-mode .exam-banner-days-label { color: #a09be0; }
body.dark-mode .exam-banner-icon { background: rgba(175,169,236,0.3); }
body.has-bg .exam-banner { background: rgba(238,237,254,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }

/* ---- Section Labels ---- */
.section-label {
    font-size: 11px; font-weight: 500; text-transform: uppercase;
    color: #888780; letter-spacing: 0.04em; margin-bottom: 8px;
}

/* ---- Resume Card ---- */
.resume-section { margin-bottom: 16px; }
.resume-card {
    display: flex; align-items: center; justify-content: space-between;
    background: var(--card); border: 0.5px solid var(--border);
    border-radius: 12px; padding: 16px; gap: 12px;
}
body.dark-mode .resume-card { background: var(--card); border-color: rgba(255,255,255,0.06); }
body.has-bg .resume-card { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.dark-mode.has-bg .resume-card { background: rgba(22,33,62,0.92); }

.resume-card-left { display: flex; align-items: center; gap: 10px; min-width: 0; }
.resume-card-icon { font-size: 18px; flex-shrink: 0; }
.resume-card-info { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.resume-card-title {
    font-size: 13px; font-weight: 500; color: var(--text);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.resume-card-sub { font-size: 11px; color: var(--text-light); }

.resume-card-right { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.resume-progress-wrap { display: flex; align-items: center; gap: 6px; }
.resume-progress-bar {
    width: 100px; height: 4px; background: var(--border);
    border-radius: 2px; overflow: hidden;
}
.resume-progress-fill {
    height: 100%; background: var(--color-brand); border-radius: 2px;
    transition: width 0.3s ease;
}
.resume-progress-text { font-size: 11px; color: var(--text-light); white-space: nowrap; }
.resume-continue {
    font-size: 13px; font-weight: 500; color: var(--color-brand);
    text-decoration: none; white-space: nowrap;
}
.resume-continue:hover { text-decoration: underline; }

/* ---- Tools Row ---- */
.tools-row {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
}
.tool-card-compact {
    display: flex; align-items: center; gap: 8px;
    background: var(--card); border: 0.5px solid var(--border);
    border-radius: 12px; padding: 14px 16px;
    text-decoration: none; color: var(--text);
    transition: border-color 0.15s, transform 0.15s;
    min-height: 44px;
}
.tool-card-compact:hover { border-color: var(--color-brand); transform: translateY(-1px); }
body.dark-mode .tool-card-compact { background: var(--card); border-color: rgba(255,255,255,0.06); }
body.has-bg .tool-card-compact { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.dark-mode.has-bg .tool-card-compact { background: rgba(22,33,62,0.92); }
.tool-card-icon { font-size: 16px; }
.tool-card-label { font-size: 13px; font-weight: 500; }

.tools-show-all {
    font-size: 13px; font-weight: 500; color: var(--text-light);
    text-decoration: none; transition: color 0.15s;
}
.tools-show-all:hover { color: var(--color-brand); }

/* ---- Auth bar ---- */
.auth-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 16px;
}
.auth-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    vertical-align: middle;
}
.auth-name {
    font-size: 0.85rem;
    color: var(--text);
    font-weight: 600;
    vertical-align: middle;
    margin-left: 4px;
}
.auth-btn {
    font-size: 0.82rem;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 8px;
    border: 1.5px solid var(--primary);
    background: var(--primary-light);
    color: var(--primary);
    cursor: pointer;
    transition: all 0.2s;
}
.auth-btn:hover {
    background: var(--primary);
    color: #fff;
}
.gem-pill {
    background: rgba(168,85,247,0.12) !important;
    border-color: rgba(168,85,247,0.3) !important;
    color: #a855f7 !important;
    display: inline-flex !important;
    align-items: center;
    gap: 5px;
    font-weight: 700;
}
.gem-pill:hover {
    background: rgba(168,85,247,0.22) !important;
    color: #a855f7 !important;
}

/* ---- Settings Dropdown ---- */

/* ---- Lesson History Dropdown ---- */
.lesson-history-dropdown {
    display: none; position: absolute; right: 0; top: calc(100% + 8px);
    background: var(--card); border-radius: var(--radius); box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    padding: 0; min-width: 320px; max-width: 380px; z-index: 500; text-align: left;
    max-height: 420px; overflow-y: auto;
}
.lesson-history-dropdown.show { display: block; }
.lh-heading {
    font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px;
    padding: 12px 16px 8px; margin: 0; border-bottom: 1px solid rgba(0,0,0,0.08);
    color: var(--text-light);
}
.lh-item {
    display: flex; align-items: center; gap: 10px; padding: 10px 16px;
    text-decoration: none; color: var(--text); transition: background 0.15s;
}
.lh-item:hover { background: rgba(0,0,0,0.04); }
.lh-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.lh-info { flex: 1; min-width: 0; }
.lh-title {
    display: block; font-size: 0.88rem; font-weight: 600; white-space: nowrap;
    overflow: hidden; text-overflow: ellipsis;
}
.lh-meta { display: block; font-size: 0.72rem; color: var(--text-light); margin-top: 2px; }
.lh-empty { padding: 20px 16px; font-size: 0.85rem; color: var(--text-light); text-align: center; margin: 0; }
body.dark-mode .lesson-history-dropdown { background: var(--card); }
body.dark-mode .lh-heading { border-bottom-color: rgba(255,255,255,0.08); }
body.dark-mode .lh-item:hover { background: rgba(255,255,255,0.05); }
body.has-bg .lesson-history-dropdown { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.dark-mode.has-bg .lesson-history-dropdown { background: rgba(22,33,62,0.92); }

/* ---- Teacher / Classroom Settings ---- */
.settings-section-title {
    font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px;
    color: var(--primary); margin: 8px 0 4px; padding-top: 8px;
    border-top: 1px solid rgba(0,0,0,0.08);
}
body.dark-mode .settings-section-title { border-top-color: rgba(255,255,255,0.08); }
.settings-text-input {
    font-size: 0.85rem; padding: 6px 10px; border-radius: 8px;
    border: 1.5px solid var(--border); background: var(--bg-subtle); color: var(--text);
    font-family: inherit;
}
body.dark-mode .settings-text-input { background: #0f1a30; border-color: #2a2a4a; color: var(--text); }

/* ---- Classroom Modals ---- */
.classroom-modal-overlay {
    position: fixed; inset: 0; z-index: 10001;
    background: rgba(0,0,0,0.5); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
    display: flex; align-items: center; justify-content: center; padding: 20px;
}
.classroom-modal {
    background: var(--card, #fff); border-radius: 16px; padding: 24px;
    max-width: 480px; width: 100%; max-height: 90vh; overflow-y: auto;
    box-shadow: 0 16px 48px rgba(0,0,0,0.2);
    animation: classroomModalIn 0.25s ease;
}
.classroom-modal-lg { max-width: 680px; }
@keyframes classroomModalIn {
    from { opacity: 0; transform: translateY(16px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
body.dark-mode .classroom-modal { background: var(--card); }
body.dark-mode .classroom-modal textarea,
body.dark-mode .classroom-modal input {
    background: #0f1a30; border-color: #2a2a4a; color: var(--text);
}

/* ---- Students Table ---- */
.students-table {
    width: 100%; border-collapse: collapse; font-size: 0.85rem;
}
.students-table th {
    background: var(--primary); color: #fff; padding: 8px 10px;
    text-align: left; font-weight: 600; font-size: 0.8rem;
}
.students-table th:first-child { border-radius: 8px 0 0 0; }
.students-table th:last-child { border-radius: 0 8px 0 0; }
.students-table td {
    padding: 8px 10px; border-bottom: 1px solid rgba(0,0,0,0.06);
}
body.dark-mode .students-table td { border-bottom-color: rgba(255,255,255,0.06); }

/* ---- Font Classes ---- */
body.font-inter { font-family: 'Inter', sans-serif; }
body.font-poppins { font-family: 'Poppins', sans-serif; }
body.font-dyslexic { font-family: 'OpenDyslexic', sans-serif; }
body.font-mono { font-family: 'JetBrains Mono', monospace; }

/* ---- Exam Countdown ---- */
.exam-countdown {
    background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
    padding: 20px 24px; margin-bottom: 20px; text-align: center;
}
.countdown-inner { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.countdown-label {
    display: flex; align-items: center; gap: 8px;
    font-size: 0.85rem; font-weight: 600; color: var(--text-light);
}
.countdown-icon { font-size: 1.1rem; }
.countdown-edit-btn {
    background: none; border: none; color: var(--text-light); cursor: pointer;
    font-size: 0.9rem; padding: 2px 6px; border-radius: 6px; transition: all 0.2s;
}
.countdown-edit-btn:hover { color: var(--primary); background: var(--primary-light, rgba(67,97,238,0.08)); }
.countdown-timer { display: flex; align-items: center; gap: 4px; }
.countdown-unit { display: flex; flex-direction: column; align-items: center; min-width: 52px; }
.countdown-unit span {
    font-size: 1.8rem; font-weight: 700; color: var(--primary);
    font-variant-numeric: tabular-nums;
}
.countdown-unit small { font-size: 0.65rem; color: var(--text-light); text-transform: uppercase; letter-spacing: 0.5px; }
.countdown-sep { font-size: 1.4rem; font-weight: 700; color: var(--text-light); opacity: 0.4; padding-bottom: 14px; }
.countdown-date { font-size: 0.75rem; color: var(--text-light); opacity: 0.7; }
.countdown-edit-panel {
    margin-top: 12px; padding-top: 12px; border-top: 1px solid rgba(0,0,0,0.06);
    display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.countdown-edit-panel label { font-size: 0.85rem; color: var(--text); display: flex; align-items: center; gap: 8px; }
.countdown-edit-panel input[type="date"] {
    padding: 6px 10px; border: 2px solid rgba(0,0,0,0.1); border-radius: 8px;
    font-family: inherit; font-size: 0.85rem; background: var(--bg); color: var(--text);
}
.countdown-edit-actions { display: flex; gap: 8px; align-items: center; }
body.dark-mode .countdown-edit-panel { border-top-color: rgba(255,255,255,0.06); }
body.dark-mode .countdown-edit-panel input[type="date"] { background: #0f1a30; border-color: #2a2a4a; color: var(--text); }
body.has-bg .exam-countdown { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.dark-mode.has-bg .exam-countdown { background: rgba(22,33,62,0.92); }

/* Remote Config banners */
.rc-announcement {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding: 10px 16px; margin-bottom: 16px; background: var(--primary);
    border-radius: var(--radius); color: #fff; font-size: 0.85rem; font-weight: 500;
}
.rc-announcement a { color: #fff; text-decoration: underline; }
.rc-announcement-close {
    background: none; border: none; color: #fff; font-size: 1.2rem;
    cursor: pointer; padding: 0 4px; opacity: 0.7; transition: opacity 0.2s;
}
.rc-announcement-close:hover { opacity: 1; }
.rc-maintenance {
    padding: 10px 16px; margin-bottom: 16px; background: var(--warning);
    border-radius: var(--radius); color: #fff; font-size: 0.85rem; text-align: center;
}

.countdown-show-btn {
    display: block; width: 100%; padding: 10px; margin-bottom: 20px; text-align: center;
    background: var(--card); border: 2px dashed rgba(0,0,0,0.08); border-radius: var(--radius);
    color: var(--text-light); font-size: 0.8rem; font-weight: 600; font-family: inherit;
    cursor: pointer; transition: all 0.2s;
}
.countdown-show-btn:hover { border-color: var(--primary); color: var(--primary); }
body.dark-mode .countdown-show-btn { background: #16213e; border-color: rgba(255,255,255,0.06); }
body.has-bg .countdown-show-btn { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.dark-mode.has-bg .countdown-show-btn { background: rgba(22,33,62,0.92); }

/* ---- Subject Grid ---- */
.subject-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.subject-card {
    background: var(--card);
    border-radius: 12px;
    border: 0.5px solid var(--border);
    padding: 16px;
    transition: all 0.2s ease;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    opacity: 0; transform: translateY(24px) scale(0.97);
    min-height: 44px;
}
.subject-card.card-visible, .project-card.card-visible {
    opacity: 1; transform: translateY(0) scale(1);
    transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.25s ease, box-shadow 0.25s ease;
}
.subject-card:not(.coming-soon) {
    cursor: pointer;
}
.subject-card:not(.coming-soon):hover {
    border-color: var(--color-brand);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(83, 74, 183, 0.12);
}

.subject-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.subject-icon-sm { font-size: 18px; line-height: 1; flex-shrink: 0; }

.subject-card-row {
    display: flex; align-items: center; gap: 8px;
    margin-bottom: 10px;
}
.subject-card-name { font-size: 13px; font-weight: 500; color: var(--text); }

.subject-card-footer {
    display: flex; align-items: center; gap: 8px;
}
.subject-pip {
    width: 32px; height: 3px; border-radius: 2px;
}
.subject-card-count {
    font-size: 11px; color: var(--text-light); white-space: nowrap;
}

.subject-card h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.subject-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.5;
    margin-bottom: 14px;
}

/* Subject accent colours */
.subject-card.maths h2 { color: #4361ee; }
.subject-card.physics h2 { color: #e84393; }
.subject-card.chemistry h2 { color: #00b894; }
.subject-card.biology h2 { color: #6c5ce7; }
.subject-card.english h2 { color: #e17055; }
.subject-card.humanities h2 { color: #8b6914; }
.subject-card.arts h2 { color: #7c3aed; }
.subject-card.cpp h2 { color: #0891b2; }
.subject-card.forum-card h2 { color: var(--primary); }

/* Tags */
.subject-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.subject-tag {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 12px;
    background: var(--primary-light);
    color: var(--primary);
}
.subject-tag.active {
    background: #d5f5e3;
    color: #1e8449;
}
.subject-tag.new {
    background: linear-gradient(135deg, #e8daef, #d2b4de);
    color: #6c3483;
    font-weight: 600;
}
.subject-tag.soon {
    background: #fdebd0;
    color: #b9770e;
}

/* Subject updated date */
.subject-updated {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 10px;
    opacity: 0.7;
}

/* Coming soon overlay */
.subject-card.coming-soon {
    opacity: 0.65;
    cursor: default;
}
.subject-card.coming-soon::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius);
    background: repeating-linear-gradient(
        -45deg,
        transparent,
        transparent 8px,
        rgba(0,0,0,0.02) 8px,
        rgba(0,0,0,0.02) 16px
    );
    pointer-events: none;
}

/* ---- Wallpaper overlay ---- */
.bg-overlay { position: fixed; inset: 0; z-index: -1; background-size: cover; background-position: center; background-attachment: fixed; pointer-events: none; }

/* Glassmorphism when wallpaper is active */
body.has-bg .subject-card,
body.has-bg .fb-float-panel { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.has-bg .hub-header { display: none; }
body.has-bg .hub-header h1 { color: var(--primary); }
body.has-bg .hub-header p { color: var(--text); }
body.has-bg .subject-card p { color: var(--text); }
body.has-bg .subject-card.coming-soon { opacity: 0.75; }
body.has-bg .hub-footer { color: #fff; text-shadow: 0 1px 4px rgba(0,0,0,0.5); opacity: 1; }
body.has-bg .last-updated { color: #fff; opacity: 0.85; }

/* Dark mode + wallpaper: dark glassmorphism instead of light */
body.dark-mode.has-bg .subject-card,
body.dark-mode.has-bg .fb-float-panel { background: rgba(22,33,62,0.88); }
body.dark-mode.has-bg .hub-header { background: rgba(22,33,62,0.85); }
body.dark-mode.has-bg .subject-card p { color: var(--text-light); }
body.dark-mode.has-bg .hub-header p { color: var(--text-light); }

/* ---- Feedback float ---- */
.btn-primary { display: inline-block; padding: 10px 20px; border: none; border-radius: 10px; background: var(--primary); color: #fff; font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: background 0.2s; }
.btn-primary:hover { filter: brightness(1.08); }
.fb-float-btn { position: fixed; bottom: 24px; right: 24px; z-index: 900; width: 46px; height: 46px; border-radius: 50%; border: none; background: var(--primary); color: #fff; font-size: 1.2rem; cursor: pointer; box-shadow: 0 4px 16px rgba(67,97,238,0.35); transition: transform 0.2s, box-shadow 0.2s; display: flex; align-items: center; justify-content: center; }
.fb-float-btn:hover { transform: scale(1.1); box-shadow: 0 6px 24px rgba(67,97,238,0.45); }
.fb-float-panel { position: fixed; bottom: 80px; right: 24px; z-index: 901; width: 300px; background: var(--card); border-radius: 16px; box-shadow: 0 8px 32px rgba(0,0,0,0.18); display: none; overflow: hidden; }
.fb-float-panel.show { display: block; }
.fb-float-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; background: var(--primary); color: #fff; font-weight: 700; font-size: 0.95rem; }
.fb-float-close { background: none; border: none; color: #fff; font-size: 1.3rem; cursor: pointer; padding: 0; line-height: 1; }
.fb-float-body { padding: 16px; }
.fb-float-body select, .fb-float-body textarea { width: 100%; border: 2px solid var(--border); border-radius: 10px; padding: 8px 12px; font-size: 0.9rem; font-family: inherit; margin-bottom: 12px; transition: border-color 0.2s; }
.fb-float-body select:focus, .fb-float-body textarea:focus { border-color: var(--primary); outline: none; }
.fb-float-body textarea { min-height: 80px; resize: vertical; }
.fb-confirmation { text-align: center; color: #27ae60; font-weight: 600; font-size: 0.85rem; margin-top: 8px; opacity: 0; transition: opacity 0.3s; }
.fb-confirmation.show { opacity: 1; }

/* ---- Search Bar ---- */
.search-bar { position: relative; margin-bottom: 20px; }
.search-input {
    width: 100%; padding: 14px 110px 14px 18px; font-size: 1rem; border: 2px solid transparent;
    border-radius: var(--radius); background: var(--card); color: var(--text);
    box-shadow: var(--shadow); outline: none; transition: border-color 0.2s;
    font-family: inherit;
}
.search-input:focus { border-color: var(--primary); }
.search-input::placeholder { color: var(--text-light); opacity: 0.6; }
body.dark-mode .search-input { background: #0f1a30; border-color: #2a2a4a; color: var(--text); }
body.dark-mode .search-input:focus { border-color: var(--primary); }
body.has-bg .search-input { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.dark-mode.has-bg .search-input { background: rgba(22,33,62,0.92); }
.subject-card.search-hidden { display: none; }

/* ---- Reorder button ---- */
.reorder-btn {
    position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--card); border: 2px solid transparent; color: var(--text-light);
    font-size: 0.8rem; font-weight: 600; cursor: pointer;
    padding: 8px 14px; border-radius: 10px; font-family: inherit;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06); transition: all 0.2s;
}
.reorder-btn:hover { color: var(--primary); border-color: var(--primary); }
.reorder-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.reorder-btn.active:hover { opacity: 0.9; }
.reset-order-btn { color: var(--text-light); }
.reset-order-btn:hover { color: var(--error); border-color: var(--error); }
body.dark-mode .reorder-btn { background: #16213e; color: #a0a0b8; }
body.dark-mode .reorder-btn:hover { color: var(--primary); border-color: var(--primary); }
body.dark-mode .reorder-btn.active { background: var(--primary); color: #fff; }
body.has-bg .reorder-btn { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.has-bg .reorder-btn.active { background: var(--primary); }
body.dark-mode.has-bg .reorder-btn { background: rgba(22,33,62,0.92); }
body.dark-mode.has-bg .reorder-btn.active { background: var(--primary); }

/* ---- Reorder drag states ---- */
.subject-grid.reordering .subject-card { cursor: grab; }
.subject-grid.reordering .subject-card:active { cursor: grabbing; }
.sortable-ghost { opacity: 0.3; }
.sortable-chosen { box-shadow: 0 8px 32px rgba(0,0,0,0.15); transform: scale(1.02); }
.sortable-drag { box-shadow: 0 12px 40px rgba(0,0,0,0.2); }
.sortable-swap-highlight { border-color: var(--primary) !important; background: var(--primary-light, rgba(67,97,238,0.08)); }
.subject-grid.reordering .subject-card { border: 2px dashed rgba(67,97,238,0.3); }

/* ---- Other Projects ---- */
.other-projects { margin-top: 40px; }
.other-projects h2 { text-align: center; font-size: 1.3rem; font-weight: 700; margin-bottom: 14px; color: var(--text); }
.other-projects-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: stretch; }
.project-card {
    background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
    padding: 24px 20px; text-decoration: none; color: inherit; display: block;
    border: 2px solid transparent; transition: all 0.25s ease;
}
.project-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(67,97,238,0.18); }
.project-icon { font-size: 2rem; margin-bottom: 10px; }
.project-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; color: var(--primary); }
.project-card p { font-size: 0.85rem; color: var(--text-light); line-height: 1.5; margin-bottom: 10px; }
body.has-bg .other-projects h2 { color: #fff; text-shadow: 0 1px 4px rgba(0,0,0,0.5); }
body.has-bg .project-card { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.dark-mode.has-bg .project-card { background: rgba(22,33,62,0.92); }
/* ---- Spotify Music Card ---- */
.spotify-music-card { display: flex !important; align-items: center; gap: 16px; cursor: pointer; }
.spotify-music-card:hover { border-color: #1db954; box-shadow: 0 12px 40px rgba(29,185,52,0.18); }
.spotify-music-card:hover .spotify-listen-btn { background: #1ed760; transform: scale(1.04); }
.vinyl-disc {
    width: 64px; height: 64px; border-radius: 50%; flex-shrink: 0;
    background: radial-gradient(circle, transparent 28%, rgba(40,40,40,0.4) 29%, transparent 30%, transparent 42%, rgba(40,40,40,0.15) 43%, transparent 44%, transparent 56%, rgba(40,40,40,0.15) 57%, transparent 58%, transparent 70%, rgba(40,40,40,0.15) 71%, transparent 72%), conic-gradient(from 0deg, #1a1a1a, #2a2a2a, #1a1a1a, #2a2a2a, #1a1a1a, #2a2a2a, #1a1a1a);
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 14px rgba(0,0,0,0.3); position: relative;
    animation: vinyl-spin 4s linear infinite paused;
}
.spotify-music-card:hover .vinyl-disc { animation-play-state: running; }
@keyframes vinyl-spin { to { transform: rotate(360deg); } }
.vinyl-label { width: 30px; height: 30px; border-radius: 50%; object-fit: cover; border: 2px solid #333; }
.spotify-card-body { flex: 1; min-width: 0; }
.spotify-card-body h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 2px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.spotify-card-body p { font-size: 0.82rem; color: var(--text-light); margin-bottom: 10px; }
.spotify-listen-btn { display: inline-flex; align-items: center; gap: 6px; background: #1db954; color: #fff; font-size: 0.82rem; font-weight: 700; padding: 8px 18px; border-radius: 20px; transition: background 0.2s, transform 0.2s; }
@media (max-width: 560px) { .other-projects-grid { grid-template-columns: 1fr; } }

body.has-bg .testimonials-section h2 { color: #fff; text-shadow: 0 1px 4px rgba(0,0,0,0.5); }
body.has-bg .testimonial-card { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.has-bg .hub-timeline-section h2,
body.has-bg .hub-timeline-section p { color: #fff; text-shadow: 0 1px 4px rgba(0,0,0,0.5); }
body.has-bg .hub-tl-card { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.dark-mode.has-bg .testimonial-card { background: rgba(22,33,62,0.92); }
body.dark-mode.has-bg .hub-tl-card { background: rgba(22,33,62,0.92); }

/* ---- Settings text input ---- */
.settings-text-input { flex:1; padding:8px 14px; border:2px solid transparent; border-radius:var(--radius); font-family:inherit; font-size:0.85rem; background:var(--card); color:var(--text); box-shadow:var(--shadow); outline:none; transition:border-color 0.2s; }
.settings-text-input:focus { border-color:var(--primary); }
body.dark-mode .settings-text-input { background:#0f1a30; border-color:#2a2a4a; }
body.dark-mode .settings-text-input:focus { border-color:var(--primary); }

/* ---- Onboarding Modal ---- */
.onboard-overlay { display:none; position:fixed; inset:0; z-index:9999; background:rgba(0,0,0,0.5); backdrop-filter:blur(6px); -webkit-backdrop-filter:blur(6px); align-items:center; justify-content:center; }
.onboard-overlay.show { display:flex; }
.onboard-modal { background:var(--card); border-radius:20px; box-shadow:0 16px 48px rgba(0,0,0,0.25); padding:32px; max-width:400px; width:90%; text-align:center; max-height:90vh; overflow-y:auto; }
.onboard-modal h2 { font-size:1.3rem; font-weight:700; margin-bottom:6px; }
.onboard-field { display:flex; flex-direction:column; text-align:left; gap:4px; margin-bottom:14px; }
.onboard-field span { font-size:0.82rem; font-weight:600; color:var(--text-light); }
.onboard-field select, .onboard-field input { padding:12px 16px; border:2px solid transparent; border-radius:var(--radius); font-size:0.95rem; font-family:inherit; background:var(--card); color:var(--text); box-shadow:var(--shadow); outline:none; transition:border-color 0.2s; }
.onboard-field select:focus, .onboard-field input:focus { border-color:var(--primary); }
body.dark-mode .onboard-field select, body.dark-mode .onboard-field input { background:#0f1a30; border-color:#2a2a4a; }
body.dark-mode .onboard-field select:focus, body.dark-mode .onboard-field input:focus { border-color:var(--primary); }
.onboard-skip { display:block; margin:10px auto 0; background:none; border:none; color:var(--text-light); font-size:0.82rem; cursor:pointer; text-decoration:underline; }

/* ---- Footer ---- */
.hub-footer {
    text-align: center;
    margin-top: 48px;
    padding: 16px;
    font-size: 0.82rem;
    color: var(--text-light);
    opacity: 0.7;
}
.last-updated { font-size: 0.8rem; color: var(--text-light); margin-top: 8px; opacity: 0.7; }

/* ---- Mobile ---- */
/* ---- Dark Mode ---- */
body.dark-mode {
    --bg: #1a1a2e; --card: #16213e; --text: #e0e0e0;
    --text-light: #a0a0b8; --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --primary-light: rgba(67,97,238,0.15);
    --color-brand-light: rgba(83,74,183,0.12);
}
body.dark-mode .subject-card.coming-soon { opacity: 0.5; }
body.dark-mode .fb-float-body select,
body.dark-mode .fb-float-body textarea { background: #0f1a30; border-color: #2a2a4a; color: var(--text); }
body.dark-mode .fb-float-panel { background: var(--card); }
body.dark-mode .auth-btn { border-color: var(--primary); background: var(--primary-light); color: var(--primary); }
body.dark-mode .hub-footer { color: var(--text-light); }

/* ---- Announcement Banner ---- */
.announcement-banner {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    margin-bottom: 18px;
    background: linear-gradient(135deg, var(--primary), #6c63ff);
    color: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(67, 97, 238, 0.25);
    font-size: 0.92rem;
    line-height: 1.45;
    animation: announceFadeIn 0.4s ease;
}
@keyframes announceFadeIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}
.announcement-icon { font-size: 1.3rem; flex-shrink: 0; }
.announcement-text { flex: 1; }
.announcement-dismiss {
    background: none; border: none; color: rgba(255,255,255,0.7);
    font-size: 1.3rem; cursor: pointer; padding: 0 2px; line-height: 1;
    transition: color 0.2s;
}
.announcement-dismiss:hover { color: #fff; }
body.has-bg .announcement-banner {
    background: linear-gradient(135deg, rgba(67,97,238,0.85), rgba(108,99,255,0.85));
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}

/* ---- Hub Stats ---- */
.hub-dashboard-card {
    background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
    padding: 24px 20px 20px; margin-bottom: 24px;
}
body.has-bg .hub-dashboard-card { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
.hub-dashboard-card .hub-stats-grid { margin-bottom: 20px; }
.hub-dashboard-card .hub-stat { box-shadow: none; background: var(--bg); }
body.has-bg .hub-dashboard-card .hub-stat { background: rgba(0,0,0,0.04); }
.hub-dashboard-card .exam-countdown { box-shadow: none; background: transparent; padding: 16px 0 0; margin-bottom: 0; border-top: 1px solid rgba(0,0,0,0.06); border-radius: 0; }
.hub-stats-grid { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
.hub-stat { background: var(--card); border-radius: 14px; box-shadow: var(--shadow); padding: 14px 20px; text-align: center; min-width: 100px; }
.hub-stat-val { font-size: 1.4rem; font-weight: 700; color: var(--primary); }
.hub-stat-lbl { font-size: 0.72rem; color: var(--text-light); text-transform: uppercase; letter-spacing: 0.03em; margin-top: 2px; }

/* ---- Leaderboard Toggle ---- */
.lb-toggle { display: flex; justify-content: center; gap: 4px; margin-bottom: 14px; }
.lb-toggle-btn {
    padding: 6px 18px; border-radius: 8px; border: 1.5px solid #d0d0d0; background: transparent;
    color: var(--text-light); font-size: 0.82rem; font-weight: 600; cursor: pointer; transition: all 0.2s;
}
.lb-toggle-btn.active { border-color: var(--primary); background: var(--primary); color: #fff; }
.lb-toggle-btn:not(.active):hover { border-color: var(--primary); color: var(--primary); }
body.dark-mode .lb-toggle-btn { border-color: #2a2a4a; color: var(--text-light); }
body.dark-mode .lb-toggle-btn.active { border-color: var(--primary); background: var(--primary); color: #fff; }

/* ---- Hub Leaderboard ---- */
.hub-leaderboard { margin-top: 32px; }
.hub-leaderboard h2 { text-align: center; font-size: 1.3rem; font-weight: 700; margin-bottom: 14px; color: var(--text); }
.hub-lb-scroll { max-height: 480px; overflow-y: auto; border-radius: var(--radius); }
.hub-lb-scroll::-webkit-scrollbar { width: 6px; }
.hub-lb-scroll::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 3px; }
body.dark-mode .hub-lb-scroll::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); }

/* Leaderboard cards */
.hub-lb-cards { display: flex; flex-direction: column; gap: 8px; padding: 2px; }
.hub-lb-card {
    display: flex; align-items: center; gap: 12px;
    background: var(--card); border-radius: 14px; padding: 12px 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    transition: box-shadow 0.2s, transform 0.15s;
}
.hub-lb-card:hover { box-shadow: 0 6px 20px rgba(0,0,0,0.1); transform: translateY(-1px); }
.hub-lb-card.lb-me { border: 2px solid var(--primary); background: var(--primary-light); }
.hub-lb-card-rank { font-size: 0.9rem; font-weight: 800; min-width: 28px; text-align: center; color: var(--primary); }
.hub-lb-card-avatar {
    width: 36px; height: 36px; border-radius: 50%; overflow: hidden; flex-shrink: 0;
    background: var(--primary-light); display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.95rem; color: var(--primary);
}
.hub-lb-card-avatar img { width: 100%; height: 100%; object-fit: cover; }
.hub-lb-card-info { flex: 1; min-width: 0; }
.hub-lb-card-name { font-weight: 700; font-size: 0.88rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hub-lb-card-name .lb-badge { vertical-align: middle; margin-left: 4px; }
.hub-lb-card-meta { display: flex; gap: 10px; font-size: 0.75rem; color: var(--text-light); margin-top: 2px; }
.hub-lb-card-bar { width: 60px; height: 5px; background: var(--primary-light); border-radius: 3px; overflow: hidden; flex-shrink: 0; }
.hub-lb-card-bar > div { height: 100%; background: var(--primary); border-radius: 3px; transition: width 0.4s ease; }

/* Pinned user card */
.lb-you-pinned .hub-lb-card { border: 2px solid var(--primary); }
.hub-lb-you { margin-top: 4px; }
.lb-you-dots { text-align: center; font-size: 1.2rem; color: var(--text-light); line-height: 1; padding: 4px 0; letter-spacing: 0.2em; }

body.has-bg .hub-leaderboard h2 { color: #fff; text-shadow: 0 1px 4px rgba(0,0,0,0.5); }
body.has-bg .hub-lb-card { background: rgba(255,255,255,0.92); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
body.dark-mode.has-bg .hub-lb-card { background: rgba(22,33,62,0.92); }

/* Legacy table styles (kept for compatibility) */
.hub-lb-table { width: 100%; border-collapse: collapse; background: var(--card); overflow: hidden; }
.hub-lb-table thead th { position: sticky; top: 0; z-index: 2; }
.hub-lb-table th { background: var(--primary); color: #fff; font-size: 0.78rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; padding: 10px 14px; text-align: left; }
.hub-lb-table td { padding: 10px 14px; font-size: 0.88rem; border-bottom: 1px solid rgba(0,0,0,0.06); }
.hub-lb-table tr:last-child td { border-bottom: none; }
.hub-lb-table .lb-me { background: var(--primary-light); font-weight: 700; }
.hub-lb-table .lb-avatar { width: 24px; height: 24px; border-radius: 50%; vertical-align: middle; margin-right: 6px; }
.hub-lb-table .lb-pos { font-weight: 700; color: var(--primary); }
.hub-lb-table .lb-school { font-size: 0.8rem; color: var(--text-light); max-width: 140px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lb-you-table { border-radius: var(--radius); box-shadow: var(--shadow); border: 2px solid var(--primary); }

@media (max-width: 600px) {
    .subject-grid { grid-template-columns: 1fr 1fr; }
    .tools-row { grid-template-columns: 1fr; }
    .subject-card { padding: 14px; }
    .resume-card { flex-direction: column; align-items: flex-start; }
    .resume-card-right { width: 100%; justify-content: space-between; }
    .resume-progress-bar { width: 80px; }
    .exam-banner { flex-direction: column; align-items: flex-start; gap: 8px; }
    .exam-banner-right { align-self: flex-end; }
    .hub-stats-grid { gap: 8px; }
    .hub-stat { min-width: 80px; padding: 10px 14px; }
    /* Leaderboard cards: tighten on mobile */
    .hub-lb-card { padding: 10px 12px; gap: 8px; }
    .hub-lb-card-bar { display: none; }
    .hub-lb-card-avatar { width: 30px; height: 30px; font-size: 0.8rem; }
    .hub-lb-card-meta { flex-wrap: wrap; gap: 6px; }
    .lb-badge { font-size: 0.5rem; padding: 1px 4px; }
}

/* ---- Empty States ---- */
.empty-state-hub {
    display: flex; flex-direction: column; align-items: center;
    justify-content: center; gap: 6px;
    padding: 24px 16px; text-align: center;
    color: var(--text-light);
}
.empty-state-hub-icon { font-size: 28px; opacity: 0.35; }
.empty-state-hub-text { font-size: 13px; color: var(--text-light); }

/* ---- 375px Mobile Audit ---- */
@media (max-width: 375px) {
    body { padding: 10px; }
    #app { padding: 0; }
    .hub-topbar { padding: 0 10px; height: 48px; }
    .topbar-brand { font-size: 14px; }
    .topbar-right { gap: 8px; }
    .topbar-avatar { width: 28px; height: 28px; font-size: 11px; }
    .topbar-streak { font-size: 12px; }
    .topbar-streak-flame { font-size: 14px; }

    .exam-banner { padding: 10px 12px; border-radius: 10px; }
    .exam-banner-icon { width: 24px; height: 24px; font-size: 12px; }
    .exam-banner-title { font-size: 12px; }
    .exam-banner-days { font-size: 18px; }

    .resume-card { padding: 12px; border-radius: 10px; }
    .resume-card-title { font-size: 12px; }
    .resume-progress-bar { width: 60px; }

    .section-label { font-size: 10px; }
    .subject-grid { gap: 8px; }
    .subject-card { padding: 12px; border-radius: 10px; }
    .subject-card-name { font-size: 12px; }
    .subject-icon-sm { font-size: 16px; }
    .subject-card-count { font-size: 10px; }

    .tools-row { gap: 8px; }
    .tool-card-compact { padding: 12px; border-radius: 10px; }
    .tool-card-label { font-size: 12px; }
    .tool-card-icon { font-size: 14px; }

    .hub-hero { padding: 24px 16px 20px; }
    .hub-hero-title { font-size: 1.4rem; }
    .hub-hero-subtitle { font-size: 0.88rem; }
    .hub-hero-btn { padding: 10px 20px; font-size: 0.88rem; }

    .topbar-dropdown { min-width: 180px; }
    .topbar-dd-item { padding: 9px 14px; font-size: 12px; }

    .suggestions-section textarea { min-height: 60px; font-size: 0.85rem; }
}

/* ---- Music Button ---- */
.music-btn {
    position: fixed; bottom: 80px; right: 20px; z-index: 900;
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--primary); color: #fff; border: none;
    font-size: 1.3rem; cursor: pointer;
    box-shadow: 0 2px 12px rgba(67,97,238,0.4);
    transition: background 0.2s, transform 0.15s;
    display: flex; align-items: center; justify-content: center;
    opacity: 0.85;
}
.music-btn:hover { transform: scale(1.1); opacity: 1; }
.music-btn.playing { background: #06d6a0; box-shadow: 0 2px 12px rgba(6,214,160,0.4); }

/* ---- Gems & Freezes (hub bar) ---- */
.daily-streak-bar { display: flex; justify-content: center; gap: 24px; margin-top: 14px; }
.daily-streak-item { display: flex; align-items: baseline; gap: 5px; }
.daily-streak-val { font-size: 1.5rem; font-weight: 800; color: #ffc107; }
.daily-streak-label { font-size: 0.78rem; color: var(--text-light); }
.gem-val { color: #a855f7 !important; }
.freeze-dots { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; justify-content: center; }
.freeze-dot { width: 14px; height: 14px; border-radius: 50%; border: 2px solid #60a5fa; background: transparent; display: inline-block; transition: background 0.3s; }
.freeze-dot.filled { background: #60a5fa; box-shadow: 0 0 6px rgba(96,165,250,0.5); }

/* ---- Onboarding Step Indicator ---- */
.onboard-steps { display: flex; align-items: center; justify-content: center; gap: 0; margin-bottom: 20px; }
.onboard-dot {
    width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 0.75rem; font-weight: 700; border: 2px solid #d0d0d0; background: transparent; color: #999; transition: all 0.3s;
}
.onboard-dot.active { border-color: var(--primary); background: var(--primary); color: #fff; }
.onboard-dot.done { border-color: #27ae60; background: #27ae60; color: #fff; }
.onboard-line { width: 40px; height: 2px; background: #d0d0d0; transition: background 0.3s; }
.onboard-line.done { background: #27ae60; }
.onboard-modal { max-width: 400px; transition: max-width 0.3s ease; max-height: 90vh; overflow-y: auto; }
.onboard-modal.step-2 { max-width: 480px; }

/* ---- Subject Group Cards ---- */
.subject-group {
    border: 2px solid var(--border); border-radius: 12px; padding: 14px 16px; margin-bottom: 12px;
    text-align: left; transition: border-color 0.2s;
}
.subject-group.locked { opacity: 0.7; background: rgba(0,0,0,0.02); }
.subject-group.error { border-color: var(--error); }
.subject-group-header {
    display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; font-size: 0.9rem; font-weight: 600;
}
.subject-group-req { font-size: 0.72rem; font-weight: 500; color: var(--text-light); }
.subject-group-lock { font-size: 0.72rem; font-weight: 500; color: #27ae60; }
.subject-group-options { display: flex; flex-wrap: wrap; gap: 8px; }
.subject-group-error {
    font-size: 0.75rem; color: var(--error); margin-top: 6px; max-height: 0; overflow: hidden; opacity: 0;
    transition: max-height 0.25s ease, opacity 0.25s ease;
}
.subject-group.error .subject-group-error { max-height: 30px; opacity: 1; }

/* ---- Pill Labels (radio/checkbox) ---- */
.pill-label {
    display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: 20px;
    border: 1.5px solid #d0d0d0; font-size: 0.82rem; font-weight: 500; cursor: pointer;
    transition: all 0.2s; background: transparent; color: var(--text); user-select: none;
}
.pill-label input { display: none; }
.pill-label:has(input:checked) { border-color: var(--primary); background: var(--primary-light); color: var(--primary); font-weight: 600; }

/* ---- Secondary Button ---- */
.btn-secondary {
    display: inline-block; padding: 10px 20px; border: 2px solid var(--primary); border-radius: 10px;
    background: transparent; color: var(--primary); font-size: 0.95rem; font-weight: 600;
    cursor: pointer; transition: all 0.2s;
}
.btn-secondary:hover { background: var(--primary-light); }

/* ---- Not-taking Dimming ---- */
.subject-card.not-taking {
    opacity: 0.45; filter: grayscale(0.6); transition: all 0.3s ease;
}
.subject-card.not-taking:hover { opacity: 0.75; filter: grayscale(0.2); }
.not-taking-badge {
    position: absolute; top: 12px; right: 12px; font-size: 0.68rem; font-weight: 600;
    padding: 3px 10px; border-radius: 10px; background: rgba(0,0,0,0.08); color: var(--text-light);
    pointer-events: none;
}
.maths-level-badge {
    display: inline-block; font-size: 0.72rem; font-weight: 600; padding: 3px 10px;
    border-radius: 12px; background: var(--primary); color: #fff;
}

/* ---- Dark mode variants for subject selection ---- */
body.dark-mode .subject-group { border-color: #2a2a4a; }
body.dark-mode .subject-group.locked { background: rgba(255,255,255,0.03); }
body.dark-mode .pill-label { border-color: #2a2a4a; color: var(--text); }
body.dark-mode .pill-label:has(input:checked) { border-color: var(--primary); background: var(--primary-light); color: var(--primary); }
body.dark-mode .btn-secondary { border-color: var(--primary); color: var(--primary); }
body.dark-mode .btn-secondary:hover { background: var(--primary-light); }
body.dark-mode .not-taking-badge { background: rgba(255,255,255,0.1); color: var(--text-light); }
body.dark-mode .onboard-dot { border-color: #2a2a4a; color: #666; }
body.dark-mode .onboard-line { background: #2a2a4a; }
body.dark-mode .subject-group-error { color: #f87171; }
body.dark-mode .subject-group.error { border-color: #f87171; }

/* ── Footer ── */
body.has-bg .hub-footer, body.has-bg .hub-footer p, body.has-bg .last-updated { color: #fff !important; text-shadow: 0 1px 4px rgba(0,0,0,0.5); }
body.dark-mode:not(.has-bg) .hub-footer, body.dark-mode:not(.has-bg) .hub-footer p, body.dark-mode:not(.has-bg) .last-updated { color: var(--text-light) !important; }
body:not(.has-bg):not(.dark-mode) .hub-footer, body:not(.has-bg):not(.dark-mode) .hub-footer p, body:not(.has-bg):not(.dark-mode) .last-updated { color: var(--text-light) !important; }

/* ── Hub Logo ── */
.hub-logo { max-width: 280px; height: auto; margin: 0 auto 8px; display: block; }

/* ── Testimonials ── */
.testimonials-section { max-width: 780px; margin: 40px auto; padding: 0 20px; }
.testimonials-section h2 { text-align: center; font-size: 1.4rem; margin-bottom: 20px; }
.testimonials-scroll { display: flex; gap: 20px; overflow-x: auto; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; padding-bottom: 8px; scrollbar-width: thin; justify-content: center; }
.testimonials-scroll::-webkit-scrollbar { height: 6px; }
.testimonials-scroll::-webkit-scrollbar-thumb { background: var(--border, #ccc); border-radius: 3px; }
.testimonial-card { background: var(--card); border-radius: 14px; padding: 20px 24px; box-shadow: var(--shadow); border: 1.5px solid var(--border, #e0e0e0); transition: transform 0.2s, box-shadow 0.2s; min-width: 300px; max-width: 420px; flex-shrink: 0; scroll-snap-align: center; }
.testimonial-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.testimonial-stars { color: #f1c40f; font-size: 1rem; margin-bottom: 8px; }
.testimonial-text { font-size: 0.88rem; line-height: 1.6; color: var(--text); font-style: italic; margin-bottom: 10px; }
.testimonial-author { font-size: 0.78rem; font-weight: 600; color: var(--text-light); }
body.dark-mode .testimonial-card { background: var(--card); border-color: #333; }

/* ── Hub Timeline Widget ── */
.hub-timeline-section { max-width: 900px; margin: 40px auto; padding: 0 20px; }
.hub-timeline-section h2 { text-align: center; font-size: 1.4rem; margin-bottom: 4px; }
.hub-tl-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; padding: 12px 0; }
.hub-tl-track { display: flex; gap: 16px; min-width: max-content; padding: 0 8px; position: relative; }
.hub-tl-track::before { content: ''; position: absolute; top: 50%; left: 0; right: 0; height: 2px; background: var(--border, #e0e0e0); }
.hub-tl-card { position: relative; z-index: 1; background: var(--card); border: 1.5px solid var(--border, #e0e0e0); border-radius: 10px; padding: 12px 16px; min-width: 130px; text-align: center; box-shadow: var(--shadow); transition: transform 0.2s, box-shadow 0.2s; }
.hub-tl-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.hub-tl-year { font-size: 0.68rem; font-weight: 700; color: var(--primary, #4361ee); text-transform: uppercase; }
.hub-tl-title { font-size: 0.8rem; font-weight: 600; margin-top: 4px; }
.hub-tl-scroll::-webkit-scrollbar { height: 4px; }
.hub-tl-scroll::-webkit-scrollbar-thumb { background: var(--primary, #4361ee); border-radius: 2px; }
body.dark-mode .hub-tl-card { background: var(--card); border-color: #333; }
body.dark-mode .hub-tl-track::before { background: #333; }

/* ── Hub Stat Clickable Panels ── */
.hub-stat-clickable { cursor: pointer; position: relative; transition: transform 0.15s; z-index: 10; }
.hub-stat-clickable:hover { transform: translateY(-2px); }
.hub-panel { display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%); background: var(--bg, #fff); border: 1.5px solid var(--border, #e0e0e0); border-radius: 12px; padding: 16px; min-width: 220px; box-shadow: 0 8px 24px rgba(0,0,0,0.15); z-index: 100; text-align: left; }
.hub-panel.show { display: block; }
.hub-panel h4 { margin: 0 0 8px; font-size: 0.9rem; }
body.dark-mode .hub-panel { background: #16213e; border-color: #444; }

/* ── High Contrast Mode ── */
body.high-contrast {
    --bg: #fff; --card: #fff; --text: #000; --text-light: #333;
    --shadow: 0 0 0 2px #000;
}
body.high-contrast.dark-mode {
    --bg: #000; --card: #111; --text: #fff; --text-light: #ccc;
    --shadow: 0 0 0 2px #fff;
}
body.high-contrast .subject-card,
body.high-contrast .hub-stat,
body.high-contrast .exam-countdown,
body.high-contrast .testimonial-card,
body.high-contrast .hub-tl-card,
body.high-contrast .project-card,
body.high-contrast .search-input,
body.high-contrast .settings-dropdown,
body.high-contrast .fb-float-panel {
    border: 2px solid var(--text) !important;
    overflow: hidden;
    position: relative;
}
body.high-contrast .subject-card .subject-icon {
    position: relative;
    z-index: 1;
    margin-bottom: 14px;
}
body.high-contrast .subject-tag {
    border: 1.5px solid currentColor;
}
body.high-contrast .auth-btn,
body.high-contrast .settings-toggle,
body.high-contrast .btn-primary,
body.high-contrast .btn-secondary {
    border: 2px solid currentColor !important;
}
body.high-contrast .subject-card h2 { color: var(--text) !important; }
body.high-contrast a { text-decoration: underline; }
body.high-contrast .hub-footer a { text-decoration: underline; }

/* ---- Tools & Resources grid ---- */
.tools-resources a:hover { transform: translateY(-3px); box-shadow: 0 8px 32px rgba(0,0,0,0.12); }