:root {
    --bg: #0f172a;
    --panel: #111827;
    --panel-alt: #1f2937;
    --accent: #f59e0b;
    --accent-2: #10b981;
    --muted: #94a3b8;
    --text: #e5e7eb;
    --danger: #ef4444;
    --success: #22c55e;
    --shadow: rgba(15, 23, 42, 0.45);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(180deg, #0b1120, #111827 40%, #1e293b);
    color: var(--text);
}

a { color: var(--accent); text-decoration: none; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 18px 60px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 0 28px;
}

.brand {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.nav a, .button,
button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid rgba(255,255,255,0.12);
    padding: 10px 14px;
    border-radius: 10px;
    background: rgba(148, 163, 184, 0.1);
    color: var(--text);
    cursor: pointer;
    transition: transform 0.15s ease;
}

.nav-week-link {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    min-width: 118px;
    text-align: left;
}

.nav-week-link small,
.tab small {
    font-size: 0.72rem;
    color: var(--muted);
}

.nav a:hover, .button:hover, button:hover {
    transform: translateY(-1px);
}

.hero {
    background: rgba(17, 24, 39, 0.85);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 18px;
    box-shadow: 0 18px 40px var(--shadow);
    padding: 22px;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 2.2rem;
    margin-top: 0;
    margin-bottom: 8px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 18px;
    margin-top: 18px;
}

.stat-card, .panel, .game-card, .login-card {
    background: rgba(31, 41, 55, 0.95);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 16px;
    box-shadow: 0 12px 30px var(--shadow);
}

.stat-card {
    padding: 18px;
}

.stat-card .label {
    color: var(--muted);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.stat-card .value {
    font-size: 2rem;
    font-weight: 700;
    margin-top: 8px;
}

.section-title {
    font-size: 1.3rem;
    margin: 20px 0 12px;
}

.leaderboard {
    display: grid;
    gap: 12px;
}

.leader-row {
    display: grid;
    grid-template-columns: 48px 1.3fr 0.8fr 0.8fr 0.8fr;
    gap: 12px;
    align-items: center;
    padding: 14px 16px;
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(255,255,255,0.06);
}

.rank-badge {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: rgba(245, 158, 11, 0.18);
    color: var(--accent);
    font-weight: 700;
}

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 18px 0 20px;
}

.admin-tabs {
    margin-bottom: 24px;
}

.tab {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    padding: 12px 18px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(15, 23, 42, 0.75);
    color: var(--text);
}

.tab.active {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.25), rgba(16, 185, 129, 0.18));
    border-color: rgba(245, 158, 11, 0.38);
}

.game-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
}

.game-card {
    padding: 18px;
}

.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 12px;
}

.game-teams {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 14px;
}

.team-pick {
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 12px;
    background: rgba(15, 23, 42, 0.8);
}

.team-logo {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: 800;
    margin-bottom: 10px;
    color: white;
    border: 2px solid rgba(255,255,255,0.35);
    box-shadow: inset 0 0 0 2px rgba(255,255,255,0.1);
}

.pick-button {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    background: rgba(148, 163, 184, 0.1);
    color: var(--text);
    border: 1px solid rgba(255,255,255,0.08);
    font-weight: 700;
}

.pick-button.selected {
    background: rgba(16, 185, 129, 0.18);
    border-color: rgba(34, 197, 94, 0.5);
}

.pick-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.market-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--muted);
    padding: 4px 0;
}

.chart-panel {
    margin-top: 24px;
    padding: 18px;
}

#score-chart {
    width: 100%;
    height: 280px;
    display: block;
    background: rgba(15, 23, 42, 0.6);
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.08);
}

.selection-board {
    margin-top: 18px;
    padding-top: 12px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.selection-board h4 {
    margin: 0 0 10px;
}

.pick-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    color: var(--text);
}

.muted-row {
    color: var(--muted);
}

.summary-bars {
    display: grid;
    gap: 10px;
    margin-top: 16px;
}

.summary-bar {
    display: grid;
    grid-template-columns: 130px 1fr 60px;
    gap: 12px;
    align-items: center;
}

.summary-track {
    background: rgba(148, 163, 184, 0.12);
    border-radius: 999px;
    height: 12px;
    overflow: hidden;
}

.summary-fill {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.login-card {
    max-width: 480px;
    margin: 60px auto;
    padding: 28px;
}

.login-card form {
    display: grid;
    gap: 14px;
}

input, select {
    width: 100%;
    border: 1px solid rgba(255,255,255,0.1);
    background: rgba(15, 23, 42, 0.9);
    color: var(--text);
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 1rem;
}

.alerts {
    margin: 10px 0 16px;
    display: grid;
    gap: 10px;
}

.alert {
    border-radius: 10px;
    padding: 10px 12px;
    border: 1px solid transparent;
}

.alert-success { background: rgba(34, 197, 94, 0.12); border-color: rgba(34, 197, 94, 0.5); }
.alert-danger { background: rgba(239, 68, 68, 0.12); border-color: rgba(239, 68, 68, 0.5); }
.alert-warning { background: rgba(245, 158, 11, 0.12); border-color: rgba(245, 158, 11, 0.5); }

.admin-grid {
    display: grid;
    gap: 18px;
}

.admin-card {
    padding: 18px;
    border-radius: 16px;
    background: rgba(31, 41, 55, 0.9);
    border: 1px solid rgba(255,255,255,0.08);
}

.admin-pick-row {
    display: grid;
    grid-template-columns: 1.3fr 1fr 1fr 1fr;
    align-items: center;
    gap: 12px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

@media (max-width: 760px) {
    .leader-row {
        grid-template-columns: 42px 1fr 0.8fr;
    }
    .leader-row .empty-space { display: none; }
    .summary-bar {
        grid-template-columns: 1fr;
    }
}