/* ================================================================
   LEADERBOARD v3 — Dedicated stylesheet
   Podium, section tabs, period/scope toggles, events, rivals
   ================================================================ */

/* ── Variables ──────────────────────────────────────────────────── */
:root {
    --lb-gold: #FFD700;
    --lb-gold-dark: #B8860B;
    --lb-silver: #C0C0C0;
    --lb-silver-dark: #808080;
    --lb-bronze: #CD7F32;
    --lb-bronze-dark: #8B4513;
    --lb-bg: #f5f7fa;
    --lb-card: #fff;
    --lb-text: #1a1a2e;
    --lb-text-light: #6c757d;
    --lb-border: rgba(0,0,0,0.08);
    --lb-primary: var(--primary, #6c63ff);
}
body.dark-mode {
    --lb-bg: #0f1525;
    --lb-card: #1a2240;
    --lb-text: #e2e8f0;
    --lb-text-light: #94a3b8;
    --lb-border: rgba(255,255,255,0.08);
}

/* ── Layout ─────────────────────────────────────────────────────── */
.lb-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px 16px 80px;
}
.lb-header {
    text-align: center;
    margin-bottom: 24px;
}
.lb-header h1 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--lb-text);
    margin: 0 0 4px;
}
.lb-header p {
    color: var(--lb-text-light);
    font-size: 0.9rem;
    margin: 0;
}

/* ── Section Tabs (Leaderboard | Streaks | Events | Rivals) ───── */
.lb-section-tabs {
    display: flex;
    gap: 4px;
    background: var(--lb-border);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 20px;
}
.lb-section-tab {
    flex: 1;
    padding: 10px 8px;
    text-align: center;
    border: none;
    background: transparent;
    color: var(--lb-text-light);
    font-weight: 600;
    font-size: 0.85rem;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
}
.lb-section-tab.active {
    background: var(--lb-card);
    color: var(--lb-primary);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

/* ── Subject Tabs ───────────────────────────────────────────────── */
.lb-subject-tabs {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 8px;
    margin-bottom: 16px;
    scrollbar-width: none;
}
.lb-subject-tabs::-webkit-scrollbar { display: none; }
.lb-subject-tab {
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--lb-border);
    background: transparent;
    color: var(--lb-text-light);
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
    transition: all 0.2s;
}
.lb-subject-tab.active {
    background: var(--lb-primary);
    color: #fff;
    border-color: var(--lb-primary);
}

/* ── Period + Scope Toggles ─────────────────────────────────────── */
.lb-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.lb-toggle-group {
    display: flex;
    gap: 2px;
    background: var(--lb-border);
    border-radius: 10px;
    padding: 3px;
}
.lb-toggle-btn {
    padding: 6px 14px;
    border: none;
    background: transparent;
    color: var(--lb-text-light);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}
.lb-toggle-btn.active {
    background: var(--lb-card);
    color: var(--lb-primary);
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

/* ── Stats Bar ──────────────────────────────────────────────────── */
.lb-stats-bar {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.lb-stat {
    background: var(--lb-card);
    border-radius: 12px;
    padding: 12px 18px;
    border: 1px solid var(--lb-border);
    flex: 1;
    min-width: 100px;
    text-align: center;
}
.lb-stat-value {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--lb-text);
}
.lb-stat-label {
    font-size: 0.75rem;
    color: var(--lb-text-light);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ── Podium ─────────────────────────────────────────────────────── */
.lb-podium {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 12px;
    margin-bottom: 24px;
    padding: 24px 20px 20px;
    background: var(--lb-card);
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}
.lb-podium-slot {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}
.lb-podium-slot .lb-podium-avatar {
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--lb-border);
    margin-bottom: 6px;
}
/* 1st place */
.lb-podium-slot.first .lb-podium-avatar {
    width: 64px; height: 64px;
    border-color: var(--lb-gold);
    box-shadow: 0 0 20px rgba(255,215,0,0.4);
}
.lb-podium-slot.first .lb-podium-base {
    background: linear-gradient(135deg, #FFD700, #FFA500);
    height: 100px;
    width: 110px;
    border-radius: 12px 12px 0 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 12px;
    color: #5a3e00;
    position: relative;
}
.lb-podium-slot.first .lb-podium-crown {
    position: absolute;
    top: -28px;
    font-size: 1.4rem;
    animation: lb-crown-bounce 2s ease infinite;
}
@keyframes lb-crown-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}
/* 2nd place */
.lb-podium-slot.second .lb-podium-avatar {
    width: 48px; height: 48px;
    border-color: var(--lb-silver);
}
.lb-podium-slot.second .lb-podium-base {
    background: linear-gradient(135deg, #C0C0C0, #A9A9A9);
    height: 75px;
    width: 100px;
    border-radius: 12px 12px 0 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 10px;
    color: #3d3d3d;
}
/* 3rd place */
.lb-podium-slot.third .lb-podium-avatar {
    width: 48px; height: 48px;
    border-color: var(--lb-bronze);
}
.lb-podium-slot.third .lb-podium-base {
    background: linear-gradient(135deg, #CD7F32, #A0522D);
    height: 60px;
    width: 100px;
    border-radius: 12px 12px 0 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 8px;
    color: #3d1f00;
}
.lb-podium-name {
    font-size: 0.78rem;
    font-weight: 700;
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
}
.lb-podium-rank {
    font-size: 1.2rem;
    font-weight: 800;
}
.lb-podium-score {
    font-size: 0.7rem;
    font-weight: 600;
    opacity: 0.8;
}

/* ── Table ──────────────────────────────────────────────────────── */
.lb-table-wrap {
    background: var(--lb-card);
    border-radius: 16px;
    border: 1px solid var(--lb-border);
    overflow: hidden;
    margin-bottom: 16px;
}
.lb-table {
    width: 100%;
    border-collapse: collapse;
}
.lb-table th {
    padding: 10px 14px;
    text-align: left;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--lb-text-light);
    font-weight: 700;
    border-bottom: 1px solid var(--lb-border);
    background: var(--lb-card);
    position: sticky;
    top: 0;
    z-index: 1;
}
.lb-table td {
    padding: 10px 14px;
    font-size: 0.88rem;
    border-bottom: 1px solid var(--lb-border);
    color: var(--lb-text);
}
.lb-table tr:last-child td { border-bottom: none; }
.lb-table tr:hover { background: rgba(108,99,255,0.04); }
.lb-table .lb-rank {
    font-weight: 700;
    color: var(--lb-primary);
    width: 40px;
}
.lb-table .lb-user-cell {
    display: flex;
    align-items: center;
    gap: 10px;
}
.lb-table .lb-user-cell img {
    width: 32px; height: 32px;
    border-radius: 50%;
    object-fit: cover;
}
.lb-table .lb-user-name {
    font-weight: 600;
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.lb-table .lb-user-school {
    font-size: 0.75rem;
    color: var(--lb-text-light);
}
.lb-table .lb-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-left: 6px;
}
.lb-badge-pro { background: rgba(168,85,247,0.15); color: #a855f7; }
.lb-badge-owner { background: rgba(239,68,68,0.15); color: var(--error); }
.lb-accuracy { color: var(--lb-text-light); font-size: 0.82rem; }

/* ── Your Position (pinned) ─────────────────────────────────────── */
.lb-your-pos {
    background: var(--lb-card);
    border: 2px solid var(--lb-primary);
    border-radius: 12px;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}
.lb-your-pos .lb-rank {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--lb-primary);
}
.lb-your-pos img {
    width: 36px; height: 36px;
    border-radius: 50%;
}
.lb-your-pos .lb-your-name {
    font-weight: 700;
    flex: 1;
}
.lb-your-pos .lb-your-score {
    font-weight: 700;
    color: var(--lb-primary);
}

/* ── Streak Leaderboard ─────────────────────────────────────────── */
.lb-streak-list {
    display: grid;
    gap: 8px;
}
.lb-streak-row {
    background: var(--lb-card);
    border-radius: 12px;
    border: 1px solid var(--lb-border);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.lb-streak-rank {
    font-weight: 800;
    font-size: 1rem;
    color: var(--lb-primary);
    min-width: 30px;
}
.lb-streak-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    object-fit: cover;
}
.lb-streak-info { flex: 1; }
.lb-streak-name { font-weight: 700; font-size: 0.9rem; }
.lb-streak-value {
    font-weight: 800;
    font-size: 1.1rem;
    color: #f59e0b;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ── Event Cards ────────────────────────────────────────────────── */
.lb-events-grid {
    display: grid;
    gap: 12px;
}
.lb-event-card {
    background: var(--lb-card);
    border-radius: 16px;
    border: 1px solid var(--lb-border);
    padding: 20px;
    position: relative;
    overflow: hidden;
}
.lb-event-card.active {
    border-color: var(--lb-primary);
    box-shadow: 0 2px 12px rgba(108,99,255,0.1);
}
.lb-event-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.lb-event-badge.daily { background: rgba(59,130,246,0.15); color: #3b82f6; }
.lb-event-badge.weekly { background: rgba(168,85,247,0.15); color: #a855f7; }
.lb-event-badge.monthly { background: rgba(245,158,11,0.15); color: #f59e0b; }
.lb-event-badge.ended { background: rgba(107,114,128,0.15); color: #6b7280; }
.lb-event-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--lb-text);
}
.lb-event-desc {
    font-size: 0.85rem;
    color: var(--lb-text-light);
    margin-bottom: 12px;
}
.lb-event-countdown {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--lb-primary);
}
.lb-event-participants {
    font-size: 0.78rem;
    color: var(--lb-text-light);
    margin-top: 4px;
}
.lb-event-winners {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--lb-border);
}

/* ── Rival Cards ────────────────────────────────────────────────── */
.lb-rivals-grid {
    display: grid;
    gap: 16px;
}
.lb-rival-card {
    background: var(--lb-card);
    border-radius: 16px;
    border: 1px solid var(--lb-border);
    padding: 20px;
}
.lb-rival-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}
.lb-rival-header img {
    width: 44px; height: 44px;
    border-radius: 50%;
    object-fit: cover;
}
.lb-rival-name { font-weight: 700; font-size: 1rem; }
.lb-rival-school { font-size: 0.78rem; color: var(--lb-text-light); }
.lb-rival-remove {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--lb-text-light);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 4px;
}
.lb-rival-bars { display: grid; gap: 10px; }
.lb-rival-bar-row {
    display: grid;
    grid-template-columns: 80px 1fr 50px;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
}
.lb-rival-bar-label { color: var(--lb-text-light); font-weight: 600; }
.lb-rival-bar-track {
    height: 8px;
    background: var(--lb-border);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}
.lb-rival-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.4s ease;
}
.lb-rival-bar-fill.you { background: var(--lb-primary); }
.lb-rival-bar-fill.rival { background: #f59e0b; }
.lb-rival-bar-value { font-weight: 700; text-align: right; }

/* ── Add Rival ──────────────────────────────────────────────────── */
.lb-add-rival {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}
.lb-add-rival input {
    flex: 1;
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid var(--lb-border);
    background: var(--lb-card);
    color: var(--lb-text);
    font-size: 0.9rem;
}
.lb-add-rival button {
    padding: 10px 20px;
    border-radius: 10px;
    border: none;
    background: var(--lb-primary);
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
}

/* ── Empty / Loading States ─────────────────────────────────────── */
.lb-empty {
    text-align: center;
    padding: 48px 20px;
    color: var(--lb-text-light);
}
.lb-empty-icon { font-size: 2.5rem; margin-bottom: 8px; display: block; }
.lb-loading {
    text-align: center;
    padding: 48px 20px;
    color: var(--lb-text-light);
}
.lb-spinner {
    width: 32px; height: 32px;
    border: 3px solid var(--lb-border);
    border-top-color: var(--lb-primary);
    border-radius: 50%;
    animation: lb-spin 0.8s linear infinite;
    margin: 0 auto 12px;
}
@keyframes lb-spin {
    to { transform: rotate(360deg); }
}

/* ── Glassmorphism (custom wallpaper) ───────────────────────────── */
body.has-bg .lb-table-wrap,
body.has-bg .lb-event-card,
body.has-bg .lb-rival-card,
body.has-bg .lb-streak-row,
body.has-bg .lb-stat,
body.has-bg .lb-your-pos {
    background: rgba(255,255,255,0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}
body.dark-mode.has-bg .lb-table-wrap,
body.dark-mode.has-bg .lb-event-card,
body.dark-mode.has-bg .lb-rival-card,
body.dark-mode.has-bg .lb-streak-row,
body.dark-mode.has-bg .lb-stat,
body.dark-mode.has-bg .lb-your-pos {
    background: rgba(26,34,64,0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .lb-podium { gap: 8px; }
    .lb-podium-slot.first .lb-podium-base { width: 90px; height: 80px; }
    .lb-podium-slot.second .lb-podium-base { width: 80px; height: 60px; }
    .lb-podium-slot.third .lb-podium-base { width: 80px; height: 48px; }
    .lb-podium-slot.first .lb-podium-avatar { width: 52px; height: 52px; }
    .lb-podium-slot.second .lb-podium-avatar,
    .lb-podium-slot.third .lb-podium-avatar { width: 40px; height: 40px; }
    .lb-table .lb-school-col { display: none; }
    .lb-rival-bar-row { grid-template-columns: 60px 1fr 40px; }
}
@media (max-width: 480px) {
    .lb-container { padding: 16px 10px 60px; }
    .lb-header h1 { font-size: 1.4rem; }
    .lb-section-tab { font-size: 0.75rem; padding: 8px 4px; }
    .lb-stats-bar { gap: 8px; }
    .lb-stat { padding: 8px 12px; }
    .lb-stat-value { font-size: 1rem; }
    .lb-controls { gap: 8px; }
    .lb-toggle-btn { padding: 5px 10px; font-size: 0.72rem; }
    .lb-podium-slot.first .lb-podium-base { width: 78px; height: 70px; }
    .lb-podium-slot.second .lb-podium-base,
    .lb-podium-slot.third .lb-podium-base { width: 68px; }
}