/* ── Reset & Base ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #0a0a1a;
    --bg2: #12122a;
    --card: #1a1a2e;
    --card2: #16213e;
    --accent: #00d4ff;
    --accent2: #7b2ff7;
    --green: #00ff88;
    --red: #ff4757;
    --yellow: #ffd32a;
    --text: #ffffff;
    --text2: #a0a0c0;
    --border: #2a2a4a;
    --radius: 12px;
}

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

/* ── Navbar ───────────────────────────────────────────── */
.navbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 32px;
    border-bottom: 1px solid var(--border);
    background: rgba(10, 10, 26, 0.9);
    backdrop-filter: blur(10px);
    position: sticky; top: 0; z-index: 100;
}
.logo {
    font-size: 1.5rem; font-weight: 800; text-decoration: none; color: var(--text);
    letter-spacing: -0.5px;
}
.accent { color: var(--accent); }
.nav-link {
    color: var(--text2); text-decoration: none; font-weight: 500;
    transition: color 0.2s;
}
.nav-link:hover { color: var(--accent); }

/* ── Buttons ──────────────────────────────────────────── */
.btn {
    display: inline-block; padding: 12px 28px; border: none; border-radius: 8px;
    font-size: 1rem; font-weight: 600; cursor: pointer;
    transition: all 0.2s; text-decoration: none; text-align: center;
}
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: white;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0, 212, 255, 0.3); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-secondary {
    background: var(--card2); color: var(--text); border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); }
.btn-lg { padding: 16px 40px; font-size: 1.2rem; }

/* ── Hero / Landing ───────────────────────────────────── */
.hero {
    display: flex; align-items: center; justify-content: center;
    min-height: calc(100vh - 65px); padding: 40px 20px;
}
.hero-content { max-width: 900px; text-align: center; }
.badge {
    display: inline-block; background: var(--card2); padding: 6px 16px;
    border-radius: 20px; font-size: 0.85rem; font-weight: 600;
    color: var(--accent); letter-spacing: 2px; margin-bottom: 20px;
    border: 1px solid var(--border);
}
.hero-content h1 {
    font-size: 3.2rem; font-weight: 800; line-height: 1.15;
    margin-bottom: 16px; letter-spacing: -1px;
}
.subtitle { font-size: 1.15rem; color: var(--text2); margin-bottom: 32px; max-width: 520px; margin-inline: auto; }

.stats-row {
    display: flex; justify-content: center; gap: 40px; margin-bottom: 40px;
}
.stat { text-align: center; }
.stat-number { font-size: 2rem; font-weight: 800; color: var(--accent); }
.stat-label { font-size: 0.85rem; color: var(--text2); margin-top: 4px; }

.cta-section { margin-bottom: 60px; }
.cta-note { font-size: 0.85rem; color: var(--text2); margin-top: 10px; }

.how-it-works { text-align: center; }
.how-it-works h2 { font-size: 1.8rem; margin-bottom: 30px; }
.steps { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; }
.step {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px; width: 200px;
    text-align: center;
}
.step-num {
    width: 40px; height: 40px; border-radius: 50%; line-height: 40px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    font-weight: 800; margin: 0 auto 12px; font-size: 1.1rem;
}
.step h3 { margin-bottom: 8px; font-size: 1.05rem; }
.step p { font-size: 0.9rem; color: var(--text2); }

/* ── Mode Selection ───────────────────────────────────── */
.mode-section { margin-top: 40px; text-align: center; }
.mode-section h2 { font-size: 1.8rem; margin-bottom: 28px; }
.mode-cards {
    display: flex; gap: 24px; justify-content: center; align-items: stretch;
}
.mode-card {
    background: var(--card); border: 2px solid var(--border);
    border-radius: var(--radius); padding: 28px; flex: 1; max-width: 400px;
    text-align: center; position: relative; transition: border-color 0.3s;
    display: flex; flex-direction: column;
}
.mode-card:hover { border-color: var(--accent); }
.mode-card.mode-pvp { border-color: var(--border); }
.mode-card.mode-pvp:hover { border-color: var(--accent2); }

/* Ensure both mode card buttons are same size */
.mode-card .btn-lg {
    width: 100%; padding: 16px 24px; font-size: 1.1rem;
    box-sizing: border-box; line-height: 1.4;
    display: block; height: auto;
}

.mode-badge {
    display: inline-block; padding: 4px 14px; border-radius: 20px;
    font-size: 0.75rem; font-weight: 700; letter-spacing: 2px;
    background: rgba(0, 212, 255, 0.12); color: var(--accent);
    margin-bottom: 12px;
}
.mode-badge-pvp {
    background: rgba(123, 47, 247, 0.12); color: var(--accent2);
}
.mode-icon {
    font-size: 0.85rem; font-weight: 800; letter-spacing: 3px;
    color: var(--text2); margin-bottom: 12px;
}
.mode-card h3 { font-size: 1.4rem; margin-bottom: 10px; }
.mode-desc {
    font-size: 0.92rem; color: var(--text2); line-height: 1.5;
    margin-bottom: 16px;
}
.mode-features {
    text-align: left; list-style: none; padding: 0; margin-bottom: 16px;
    flex-grow: 1;
}
.mode-features li {
    font-size: 0.82rem; color: var(--text2); padding: 3px 0 3px 18px;
    position: relative; line-height: 1.35;
}
.mode-features li::before {
    content: "+"; position: absolute; left: 0; color: var(--accent);
    font-weight: 800; font-size: 0.9rem;
}
.mode-pvp .mode-features li::before { color: var(--accent2); }

.mode-price {
    font-size: 1.1rem; font-weight: 800; margin-bottom: 16px;
    color: var(--text);
}
.btn-pvp {
    background: linear-gradient(135deg, var(--accent2), #a855f7);
}
.btn-pvp:hover {
    box-shadow: 0 6px 20px rgba(123, 47, 247, 0.3);
}

/* ── Scoring Section ──────────────────────────────────── */
.scoring-section { text-align: center; margin-top: 60px; }
.scoring-section h2 { font-size: 1.8rem; margin-bottom: 24px; }
.scoring-grid {
    display: flex; gap: 20px; justify-content: center; flex-wrap: wrap;
}
.scoring-item {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px; width: 200px;
    text-align: center;
}
.scoring-icon {
    font-size: 2rem; font-weight: 900; margin-bottom: 10px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.scoring-item h3 { margin-bottom: 8px; font-size: 1.05rem; }
.scoring-item p { font-size: 0.85rem; color: var(--text2); line-height: 1.4; }

/* ── Game Screens ─────────────────────────────────────── */
.game-container {
    min-height: calc(100vh - 65px);
    display: flex; align-items: center; justify-content: center;
    padding: 20px;
}
.screen { display: none; width: 100%; max-width: 650px; }
.screen.active { display: block; animation: fadeIn 0.4s ease; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scaleIn { from { transform: scale(0.8); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes slideUp { from { transform: translateY(30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }
@keyframes countUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Intro */
.intro-card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 48px; text-align: center;
}
.intro-card h1 { font-size: 2.5rem; margin-bottom: 12px; }
.intro-card p { color: var(--text2); margin-bottom: 20px; }
.round-types { display: flex; gap: 12px; justify-content: center; margin-bottom: 20px; }
.type-tag {
    background: var(--card2); padding: 6px 16px; border-radius: 6px;
    font-size: 0.9rem; border: 1px solid var(--border);
}
.scoring-info { font-size: 0.9rem; color: var(--text2); margin-bottom: 28px; }

/* Round Intro */
.round-intro-card {
    text-align: center; animation: scaleIn 0.5s ease;
}
.round-label { font-size: 1.2rem; letter-spacing: 4px; color: var(--text2); font-weight: 600; }
.round-number {
    font-size: 8rem; font-weight: 900; line-height: 1;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.round-category { font-size: 1.4rem; color: var(--text2); margin-top: 8px; }
.round-type-badge {
    display: inline-block; margin-top: 16px; padding: 6px 20px;
    background: var(--card); border: 1px solid var(--border);
    border-radius: 20px; font-size: 0.9rem;
}

/* Question */
.question-card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 32px;
}
.question-header {
    display: flex; justify-content: space-between; margin-bottom: 16px;
    font-size: 0.9rem; color: var(--text2);
}
.timer-bar {
    height: 4px; background: var(--card2); border-radius: 2px;
    margin-bottom: 4px; overflow: hidden;
}
.timer-fill {
    height: 100%; width: 100%; background: var(--accent);
    border-radius: 2px; transition: width 1s linear;
}
.timer-fill.urgent { background: var(--red); }
.timer-text {
    text-align: right; font-size: 0.85rem; color: var(--text2); margin-bottom: 20px;
}
.question-text { font-size: 1.35rem; margin-bottom: 28px; line-height: 1.4; }

/* MC Options */
.mc-options { display: flex; flex-direction: column; gap: 10px; }
.mc-option {
    background: var(--card2); border: 2px solid var(--border);
    border-radius: 10px; padding: 14px 20px; cursor: pointer;
    font-size: 1.05rem; transition: all 0.2s; text-align: left;
    display: flex; align-items: center; gap: 12px;
}
.mc-option:hover { border-color: var(--accent); background: rgba(0, 212, 255, 0.08); }
.mc-option.selected { border-color: var(--accent); background: rgba(0, 212, 255, 0.15); }
.mc-option .opt-letter {
    width: 30px; height: 30px; border-radius: 6px; line-height: 30px;
    text-align: center; background: var(--card); font-weight: 700; font-size: 0.9rem;
    flex-shrink: 0;
}
.mc-option.selected .opt-letter { background: var(--accent); color: var(--bg); }

/* Estimation Input */
.est-input { text-align: center; }
.est-field {
    width: 100%; max-width: 300px; padding: 16px; font-size: 1.5rem;
    background: var(--card2); border: 2px solid var(--border);
    border-radius: 10px; color: var(--text); text-align: center;
    outline: none; margin-bottom: 8px;
    -moz-appearance: textfield;
}
.est-field:focus { border-color: var(--accent); }
.est-field::-webkit-inner-spin-button,
.est-field::-webkit-outer-spin-button { -webkit-appearance: none; }
.est-unit { display: block; color: var(--text2); font-size: 0.9rem; margin-bottom: 16px; }

/* Result Screen */
.result-card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 36px; text-align: center;
}
.result-header { font-size: 0.95rem; color: var(--text2); letter-spacing: 2px; margin-bottom: 16px; }
.result-icon { font-size: 4rem; margin-bottom: 12px; }
.result-text { font-size: 1.6rem; font-weight: 700; margin-bottom: 24px; }
.result-text.win { color: var(--green); }
.result-text.lose { color: var(--red); }
.result-text.tie { color: var(--yellow); }

.answer-comparison {
    display: flex; gap: 0; margin-bottom: 20px;
    background: var(--bg2); border-radius: 10px; overflow: hidden;
}
.answer-col {
    flex: 1; padding: 16px;
}
.answer-col.you { background: rgba(0, 255, 136, 0.06); }
.answer-col.ai { background: rgba(255, 71, 87, 0.06); }
.answer-col.vs {
    flex: 0; display: flex; align-items: center;
    padding: 0 12px; font-weight: 800; color: var(--text2); font-size: 0.9rem;
}
.answer-label { font-size: 0.75rem; letter-spacing: 1px; color: var(--text2); margin-bottom: 6px; }
.answer-value { font-size: 1.2rem; font-weight: 700; margin-bottom: 4px; }
.answer-points { font-size: 1.1rem; font-weight: 700; }
.answer-col.you .answer-points { color: var(--green); }
.answer-col.ai .answer-points { color: var(--red); }

.correct-answer {
    background: var(--bg2); padding: 10px 16px; border-radius: 8px;
    margin-bottom: 16px; font-size: 0.95rem; color: var(--text2);
}
.correct-answer strong { color: var(--accent); }

.ai-quip {
    font-style: italic; color: var(--text2); margin-bottom: 24px;
    padding: 12px; background: var(--bg2); border-radius: 8px;
    border-left: 3px solid var(--accent2);
}
.ai-quip::before { content: 'AI says: '; font-weight: 600; color: var(--accent2); }

/* Scores in navbar */
.game-scores { font-size: 0.95rem; font-weight: 600; }
.score-you { color: var(--green); }
.score-ai { color: var(--red); }
.score-sep { color: var(--text2); margin: 0 8px; }

/* Final Screen */
.final-card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 40px; text-align: center;
}
.final-verdict {
    font-size: 1rem; letter-spacing: 3px; font-weight: 600; margin-bottom: 8px;
}
.final-verdict.win { color: var(--green); }
.final-verdict.lose { color: var(--red); }
.final-card h1 { font-size: 2.2rem; margin-bottom: 28px; }

.final-scores {
    display: flex; justify-content: center; gap: 40px; margin-bottom: 28px;
}
.final-score { text-align: center; }
.fs-label { font-size: 0.85rem; color: var(--text2); letter-spacing: 1px; margin-bottom: 4px; }
.fs-value { font-size: 3rem; font-weight: 900; }
.final-score.you .fs-value { color: var(--green); }
.final-score.ai .fs-value { color: var(--red); }

.final-breakdown {
    margin-bottom: 28px; text-align: left;
    background: var(--bg2); border-radius: 8px; padding: 16px;
}
.breakdown-row {
    display: flex; justify-content: space-between; padding: 8px 0;
    border-bottom: 1px solid var(--border); font-size: 0.95rem;
}
.breakdown-row:last-child { border-bottom: none; }
.breakdown-row .br-result { font-weight: 700; }
.breakdown-row .br-result.win { color: var(--green); }
.breakdown-row .br-result.lose { color: var(--red); }
.breakdown-row .br-result.tie { color: var(--yellow); }

/* Name Entry */
.name-entry { margin-top: 20px; }
.name-entry h3 { font-size: 1.1rem; margin-bottom: 12px; }
.name-field {
    width: 100%; max-width: 300px; padding: 14px; font-size: 1.1rem;
    background: var(--card2); border: 2px solid var(--border);
    border-radius: 10px; color: var(--text); text-align: center;
    outline: none; margin-bottom: 16px;
}
.name-field:focus { border-color: var(--accent); }

/* Rank */
.rank-card {
    background: var(--bg2); border-radius: 10px; padding: 20px;
    margin-bottom: 20px; animation: scaleIn 0.5s ease;
}
.rank-label { font-size: 0.85rem; color: var(--text2); letter-spacing: 2px; }
.rank-number { font-size: 3rem; font-weight: 900; color: var(--accent); }
.rank-percentile { color: var(--text2); font-size: 0.95rem; }
.final-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ── Leaderboard Page ─────────────────────────────────── */
.lb-container {
    max-width: 900px; margin: 0 auto; padding: 40px 20px;
}
.lb-container h1 { font-size: 2.2rem; text-align: center; margin-bottom: 8px; }
.lb-subtitle { text-align: center; color: var(--text2); margin-bottom: 32px; }

.lb-stats-row {
    display: flex; justify-content: center; gap: 40px; margin-bottom: 32px;
}
.lb-stat { text-align: center; }
.lb-stat-val { font-size: 2rem; font-weight: 800; color: var(--accent); }
.lb-stat-label { font-size: 0.85rem; color: var(--text2); }

.lb-tabs {
    display: flex; justify-content: center; gap: 8px; margin-bottom: 28px;
}
.lb-tab {
    padding: 10px 28px; border: 2px solid var(--border); border-radius: 8px;
    background: var(--card); color: var(--text2); font-weight: 700;
    font-size: 1rem; cursor: pointer; transition: all 0.2s;
}
.lb-tab:hover { border-color: var(--accent); color: var(--text); }
.lb-tab.active { border-color: var(--accent); color: var(--accent); background: rgba(0, 212, 255, 0.08); }
.lb-tab-content { display: none; }
.lb-tab-content.active { display: block; }

.lb-table-wrap { overflow-x: auto; }
.lb-table {
    width: 100%; border-collapse: collapse;
    background: var(--card); border-radius: var(--radius); overflow: hidden;
}
.lb-table th {
    background: var(--card2); padding: 14px 16px; text-align: left;
    font-size: 0.85rem; letter-spacing: 1px; color: var(--text2);
    border-bottom: 2px solid var(--border);
}
.lb-table td {
    padding: 12px 16px; border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}
.lb-table tr:last-child td { border-bottom: none; }
.lb-table tr.beat-ai { background: rgba(0, 255, 136, 0.04); }
.lb-table tr:hover { background: rgba(0, 212, 255, 0.04); }
.rank-cell { font-weight: 800; color: var(--accent); }
.name-cell { font-weight: 600; }
.score-cell { font-weight: 700; color: var(--green); }
.result-win { color: var(--green); font-weight: 700; }
.result-lose { color: var(--red); font-weight: 700; }
.lb-empty { text-align: center; color: var(--text2); padding: 40px 16px; }

/* ── Wager Bar ────────────────────────────────────────── */
.wager-bar {
    display: flex; align-items: center; justify-content: center;
    gap: 8px; margin-bottom: 20px; flex-wrap: wrap;
}
.wager-label {
    font-size: 0.8rem; letter-spacing: 2px; color: var(--text2);
    font-weight: 700; margin-right: 4px;
}
.wager-btn {
    padding: 8px 18px; border: 2px solid var(--border); border-radius: 8px;
    background: var(--card2); color: var(--text2); font-weight: 700;
    font-size: 0.9rem; cursor: pointer; transition: all 0.2s;
}
.wager-btn:hover { border-color: var(--accent); color: var(--text); }
.wager-btn.active { border-color: var(--accent); color: var(--accent); background: rgba(0, 212, 255, 0.1); }
.wager-btn[data-wager="2"] { color: var(--yellow); }
.wager-btn[data-wager="2"].active { border-color: var(--yellow); background: rgba(255, 211, 42, 0.1); color: var(--yellow); }
.wager-btn[data-wager="3"] { color: var(--red); }
.wager-btn[data-wager="3"].active { border-color: var(--red); background: rgba(255, 71, 87, 0.1); color: var(--red); }

/* ── Fun Fact ─────────────────────────────────────────── */
.fun-fact {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(123, 47, 247, 0.06));
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px; padding: 16px; margin-bottom: 16px;
    text-align: left;
}
.fact-label {
    font-size: 0.7rem; letter-spacing: 2px; color: var(--accent);
    font-weight: 700; margin-bottom: 6px;
}
.fact-text { font-size: 0.92rem; color: var(--text2); line-height: 1.5; }

/* ── Question Stats ──────────────────────────────────── */
.question-stats {
    display: flex; gap: 20px; justify-content: center;
    margin-bottom: 16px; padding: 10px;
    background: var(--bg2); border-radius: 8px;
}
.stat-item { font-size: 0.9rem; color: var(--text2); display: flex; align-items: center; gap: 6px; }
.stat-item strong { color: var(--accent); }
.stat-icon { font-size: 1rem; }

/* ── Streak ───────────────────────────────────────────── */
.streak-indicator {
    text-align: center; padding: 6px 16px; border-radius: 20px;
    font-size: 0.9rem; font-weight: 700; margin-bottom: 16px;
    display: inline-block; width: auto; margin-left: auto; margin-right: auto;
    animation: pulse 1s ease infinite;
}
.streak-warm { background: rgba(255, 211, 42, 0.15); color: var(--yellow); }
.streak-hot { background: rgba(255, 136, 0, 0.15); color: #ff8800; }
.streak-fire { background: rgba(255, 71, 87, 0.15); color: var(--red); }

.streak-result {
    text-align: center; padding: 8px 20px; border-radius: 20px;
    font-size: 0.95rem; font-weight: 700; margin-bottom: 16px;
    background: rgba(255, 211, 42, 0.12); color: var(--yellow);
    animation: scaleIn 0.4s ease;
}

/* ── IQ Section ───────────────────────────────────────── */
.iq-section { margin-bottom: 24px; }
.iq-card {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(123, 47, 247, 0.08));
    border: 1px solid var(--accent);
    border-radius: var(--radius); padding: 28px; text-align: center;
    animation: scaleIn 0.6s ease;
}
.iq-label { font-size: 0.85rem; letter-spacing: 3px; color: var(--text2); margin-bottom: 8px; }
.iq-number {
    font-size: 5rem; font-weight: 900; line-height: 1;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; margin-bottom: 8px;
}
.iq-badge {
    display: inline-block; padding: 4px 16px; border-radius: 20px;
    font-size: 0.95rem; font-weight: 700; margin-bottom: 10px;
    background: var(--card2); color: var(--text2);
}
.iq-badge.iq-genius { background: rgba(0, 255, 136, 0.15); color: var(--green); }
.iq-badge.iq-above { background: rgba(0, 212, 255, 0.15); color: var(--accent); }
.iq-badge.iq-avg { background: rgba(255, 211, 42, 0.15); color: var(--yellow); }
.iq-badge.iq-below { background: rgba(255, 71, 87, 0.15); color: var(--red); }
.iq-desc { font-size: 0.95rem; color: var(--text2); margin-bottom: 20px; }

.iq-bell-curve { max-width: 400px; margin: 0 auto; }
.iq-scale {
    display: flex; justify-content: space-between;
    font-size: 0.75rem; color: var(--text2); margin-bottom: 6px;
}
.iq-bar-track {
    height: 8px; background: var(--card2); border-radius: 4px;
    position: relative; overflow: visible;
}
.iq-bar-fill {
    height: 100%; border-radius: 4px;
    background: linear-gradient(90deg, var(--red), var(--yellow), var(--green), var(--accent));
    transition: width 1.5s ease;
}
.iq-marker {
    position: absolute; top: -4px; width: 16px; height: 16px;
    background: white; border-radius: 50%; border: 3px solid var(--accent);
    transform: translateX(-50%); transition: left 1.5s ease;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.iq-cell { font-weight: 700; color: var(--accent); }

/* ── PvP Lobby ────────────────────────────────────────── */
.pvp-options {
    display: flex; gap: 24px; justify-content: center;
    flex-wrap: wrap; margin-top: 32px;
}
.pvp-option-card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 28px; width: 280px;
    text-align: center;
}
.pvp-option-card h2 { font-size: 1.3rem; margin-bottom: 10px; }
.pvp-option-card p { color: var(--text2); font-size: 0.9rem; margin-bottom: 16px; }
.pvp-option-card .name-field { margin-bottom: 12px; width: 100%; }
.pvp-divider {
    display: flex; align-items: center; font-size: 1.2rem;
    font-weight: 800; color: var(--text2);
}

/* Match Waiting Room */
.match-code-display { text-align: center; margin: 24px 0; }
.match-code-label { font-size: 0.8rem; letter-spacing: 3px; color: var(--text2); margin-bottom: 8px; }
.match-code {
    font-size: 3rem; font-weight: 900; letter-spacing: 8px;
    color: var(--accent); margin-bottom: 12px;
}
.match-link-display { margin: 20px 0; text-align: center; }
.match-link-display p { color: var(--text2); font-size: 0.9rem; margin-bottom: 8px; }
.match-link-display .name-field { display: inline-block; width: auto; min-width: 300px; }

.waiting-status {
    display: flex; align-items: center; justify-content: center;
    gap: 12px; margin-top: 24px; color: var(--text2);
}
.waiting-spinner {
    width: 20px; height: 20px; border: 3px solid var(--border);
    border-top-color: var(--accent); border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── PvP Round Compare ────────────────────────────────── */
.pvp-round-compare {
    display: flex; justify-content: center; align-items: center;
    gap: 16px; padding: 12px; margin-bottom: 16px;
    background: var(--bg2); border-radius: 8px;
    font-size: 1.1rem; font-weight: 700;
}
.pvp-round-vs { color: var(--text2); font-size: 0.9rem; }
.pvp-ahead { color: var(--green); }

.pvp-wait-scores { margin-top: 8px; }

/* ── Challenge / PvP ──────────────────────────────────── */
.challenge-card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 32px; margin-top: 24px;
}
.challenger-stats {
    display: flex; justify-content: center; gap: 40px; margin-bottom: 24px;
}
.challenger-stat { text-align: center; }
.cs-value { font-size: 2.2rem; font-weight: 900; color: var(--accent); }
.cs-label { font-size: 0.85rem; color: var(--text2); margin-top: 4px; }
.challenge-cta { text-align: center; }

.challenge-create, .challenge-created {
    background: var(--bg2); border-radius: 10px; padding: 20px; margin-top: 16px;
    text-align: center;
}
.challenge-create h3, .challenge-created h3 { margin-bottom: 8px; }
.challenge-create p, .challenge-created p { color: var(--text2); font-size: 0.9rem; margin-bottom: 12px; }
.challenge-link-box { display: flex; gap: 8px; align-items: center; justify-content: center; flex-wrap: wrap; }
.challenge-link-box input { flex: 1; min-width: 200px; }

.pvp-result { margin-top: 16px; }
.pvp-result h3 { text-align: center; margin-bottom: 16px; }
.pvp-scores {
    display: flex; align-items: center; gap: 0; background: var(--bg2);
    border-radius: 10px; overflow: hidden;
}
.pvp-player {
    flex: 1; padding: 20px; text-align: center;
}
.pvp-player.pvp-winner { background: rgba(0, 255, 136, 0.06); }
.pvp-vs {
    padding: 0 16px; font-weight: 900; color: var(--text2); font-size: 1.2rem;
}
.pvp-name { font-weight: 700; margin-bottom: 6px; font-size: 1.05rem; }
.pvp-score { font-size: 2.5rem; font-weight: 900; color: var(--accent); }
.pvp-iq { font-size: 0.9rem; color: var(--text2); margin-top: 4px; }
.pvp-badge {
    display: inline-block; margin-top: 8px; padding: 4px 14px;
    background: rgba(0, 255, 136, 0.15); color: var(--green);
    border-radius: 20px; font-size: 0.8rem; font-weight: 700; letter-spacing: 1px;
}
.pvp-tie {
    text-align: center; padding: 12px; color: var(--yellow);
    font-weight: 700; font-size: 1.1rem; margin-top: 12px;
}

/* ── Footer ───────────────────────────────────────────── */
footer {
    text-align: center; padding: 20px; color: var(--text2);
    font-size: 0.85rem; border-top: 1px solid var(--border);
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 600px) {
    .hero-content h1 { font-size: 2.2rem; }
    .stats-row { gap: 20px; }
    .stat-number { font-size: 1.5rem; }
    .steps { flex-direction: column; align-items: center; }
    .mode-cards { flex-direction: column; align-items: center; }
    .mode-card { max-width: 100%; }
    .navbar { padding: 12px 16px; }
    .question-card { padding: 20px; }
    .result-card { padding: 24px; }
    .final-card { padding: 24px; }
    .answer-comparison { flex-direction: column; }
    .answer-col.vs {
        padding: 6px; justify-content: center;
        border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
    }
    .final-scores { gap: 20px; }
    .fs-value { font-size: 2.2rem; }
    .lb-stats-row { gap: 20px; }
}