/* =============================================
   FLEXCAMPUS - LEADERBOARD
   ============================================= */

:root {
    --primary: #0d3865;
    --primary-dark: #092847;
    --primary-light: #1a4a7a;
    --secondary: #6dcbdd;
    --secondary-dark: #4fb8cc;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gold: #fbbf24;
    --silver: #9ca3af;
    --bronze: #d97706;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-800: #1e293b;
    --border: #e2e8f0;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
}

/* NAVBAR */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 200;
    background: var(--white); border-bottom: 1px solid var(--border);
}
.navbar-inner {
    max-width: 1000px; margin: 0 auto; padding: 0 24px;
    height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.navbar-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-icon { font-size: 28px; }
.brand-text { font-size: 20px; font-weight: 700; color: var(--primary); }
.navbar-links { display: flex; align-items: center; gap: 8px; }
.nav-link {
    padding: 8px 16px; font-size: 14px; font-weight: 500; color: var(--gray-600);
    text-decoration: none; border-radius: var(--radius-sm); transition: all 0.2s;
}
.nav-link:hover { color: var(--primary); background: var(--gray-50); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.btn-login {
    background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
    color: var(--primary-dark); font-weight: 600; padding: 8px 20px;
}

/* HERO */
.lb-hero {
    padding: 110px 24px 50px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    text-align: center; color: var(--white);
}
.lb-hero h1 { font-size: 32px; font-weight: 800; margin-bottom: 6px; }
.lb-hero p { font-size: 15px; opacity: 0.85; }

/* MAIN */
.lb-main {
    max-width: 900px; margin: 0 auto; padding: 0 24px 60px;
}

/* =============================================
   PODIUM
   ============================================= */

.podium-section {
    margin-top: -30px;
    position: relative;
    z-index: 10;
}

.podium {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 16px;
    padding: 0 20px;
}

.podium-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    text-align: center;
    padding: 24px 20px 20px;
    border: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    position: relative;
    transition: transform 0.3s;
    flex: 1;
    max-width: 220px;
}

.podium-card:hover { transform: translateY(-4px); }

.podium-card.first {
    border-color: var(--gold);
    box-shadow: 0 8px 32px rgba(251, 191, 36, 0.2);
    padding-top: 32px;
    padding-bottom: 24px;
}

.podium-card.second { border-color: var(--silver); }
.podium-card.third { border-color: var(--bronze); }

.podium-medal {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 900;
    color: var(--white);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.podium-card.first .podium-medal { background: var(--gold); width: 42px; height: 42px; font-size: 20px; }
.podium-card.second .podium-medal { background: var(--silver); }
.podium-card.third .podium-medal { background: var(--bronze); }

.podium-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    margin: 8px auto 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    background: linear-gradient(135deg, var(--secondary), var(--primary));
}

.podium-card.first .podium-avatar { width: 68px; height: 68px; font-size: 32px; }

.podium-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 4px;
}

.podium-points {
    font-size: 20px;
    font-weight: 900;
    color: var(--primary);
}

.podium-card.first .podium-points { font-size: 24px; }

.podium-points-label {
    font-size: 11px;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.podium-badges {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-top: 8px;
    font-size: 16px;
}

/* =============================================
   RANKING TABLE
   ============================================= */

.ranking-section {
    margin-top: 32px;
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
}

.ranking-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.ranking-header h2 {
    font-size: 16px;
    font-weight: 700;
    color: var(--gray-800);
}

.ranking-table {
    min-height: 100px;
}

.ranking-row {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 24px;
    border-bottom: 1px solid var(--gray-100);
    transition: background 0.2s;
}

.ranking-row:last-child { border-bottom: none; }
.ranking-row:hover { background: var(--gray-50); }

.ranking-row.current-user {
    background: linear-gradient(135deg, rgba(109, 203, 221, 0.08), rgba(13, 56, 101, 0.05));
    border-left: 3px solid var(--secondary);
}

.rank-number {
    width: 32px;
    text-align: center;
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-400);
    flex-shrink: 0;
}

.rank-number.top-1 { color: var(--gold); }
.rank-number.top-2 { color: var(--silver); }
.rank-number.top-3 { color: var(--bronze); }

.rank-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    background: linear-gradient(135deg, var(--secondary), var(--primary));
    flex-shrink: 0;
}

.rank-info {
    flex: 1;
    min-width: 0;
}

.rank-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-800);
}

.rank-meta {
    font-size: 12px;
    color: var(--gray-400);
}

.rank-badges {
    display: flex;
    gap: 2px;
    font-size: 14px;
    flex-shrink: 0;
}

.rank-points {
    font-size: 16px;
    font-weight: 800;
    color: var(--primary);
    min-width: 60px;
    text-align: right;
    flex-shrink: 0;
}

.rank-points-label {
    font-size: 11px;
    color: var(--gray-400);
    font-weight: 400;
}

/* =============================================
   BADGES SECTION
   ============================================= */

.badges-section {
    margin-top: 32px;
}

.badges-section h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 16px;
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
}

.badge-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px 16px;
    text-align: center;
    transition: all 0.2s;
}

.badge-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.08);
}

.badge-card.earned {
    border-color: var(--gold);
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.05), rgba(251, 191, 36, 0.1));
}

.badge-card.locked { opacity: 0.5; }

.badge-icon {
    font-size: 36px;
    margin-bottom: 8px;
    display: block;
}

.badge-card.locked .badge-icon { filter: grayscale(1); }

.badge-name {
    font-size: 13px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 4px;
}

.badge-desc {
    font-size: 11px;
    color: var(--gray-500);
    line-height: 1.5;
}

.badge-earned-date {
    font-size: 10px;
    color: var(--gold);
    font-weight: 600;
    margin-top: 6px;
}

/* =============================================
   UTILS
   ============================================= */

.loading-state {
    text-align: center; padding: 40px 20px; color: var(--gray-400);
}
.spinner {
    width: 36px; height: 36px;
    border: 3px solid var(--gray-200); border-top-color: var(--secondary);
    border-radius: 50%; animation: spin 0.7s linear infinite;
    margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.lb-footer {
    text-align: center; padding: 24px; border-top: 1px solid var(--border);
    color: var(--gray-400); font-size: 13px; background: var(--white);
}

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 768px) {
    .podium { flex-direction: column; align-items: center; }
    .podium-card { max-width: 100%; }
    .ranking-row { padding: 12px 16px; gap: 10px; }
    .rank-badges { display: none; }
    .badges-grid { grid-template-columns: repeat(2, 1fr); }
    .navbar-links { display: none; }
}