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

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-panel: #1a2235;
    --border: #2a3550;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #ec4899;
    --accent-dim: rgba(236, 72, 153, 0.15);
    --success: #22c55e;
    --danger: #ef4444;
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.brand h1 { font-size: 1.15rem; font-weight: 700; }
.brand h1 span.accent { color: var(--accent); }
.version-label { font-family: 'Share Tech Mono', monospace; font-size: 0.7rem; color: var(--text-muted); }

.btn-back-hub {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
    margin-left: 0.5rem;
}

.btn-back-hub:hover {
    color: var(--text-primary);
}

.mode-tabs { display: flex; gap: 0.35rem; flex-wrap: wrap; }

.mode-tab {
    padding: 0.45rem 0.85rem;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
}

.mode-tab.active {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1rem 1.5rem 2rem;
}

.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    display: none;
}

.panel.active { display: block; }

/* Browse grid */
.flag-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 0.75rem;
}

.flag-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.5rem;
    cursor: pointer;
    transition: border-color 0.2s, transform 0.15s;
    text-align: center;
}

.flag-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.flag-card .flag-svg {
    height: 65px;
    margin-bottom: 0.35rem;
}

.flag-card .label {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 700;
}

.flag-card .name {
    font-size: 0.65rem;
    color: var(--text-muted);
}

/* Detail modal */
.detail-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 50;
    padding: 1rem;
}

.detail-overlay.show { display: flex; }

.detail-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    max-width: 400px;
    width: 100%;
    text-align: center;
}

.detail-card .flag-svg { height: 120px; margin: 0 auto 1rem; max-width: 250px; }

.detail-card h2 { color: var(--accent); margin-bottom: 0.25rem; }
.detail-card .phonetic { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 0.75rem; }
.detail-card .meaning { color: var(--text-secondary); line-height: 1.5; font-size: 0.9rem; }

.btn-close {
    margin-top: 1rem;
    padding: 0.5rem 1.25rem;
    background: var(--accent-dim);
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
}

/* Quiz */
.quiz-flag-display {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    min-height: 200px;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    margin-bottom: 1rem;
    gap: 0.5rem;
}

.quiz-flag-display .flag-svg {
    width: 135px;
    height: 90px;
    animation: hoist 0.6s ease-out;
}

@keyframes hoist {
    from { transform: translateY(40px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.halyard {
    width: 4px;
    background: #64748b;
    height: 160px;
    border-radius: 2px;
}

.choices {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.choice-btn {
    padding: 0.65rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 8px;
    font-family: 'Share Tech Mono', monospace;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s;
}

.choice-btn:hover { border-color: var(--accent); }
.choice-btn.correct { border-color: var(--success); background: rgba(34,197,94,0.15); }
.choice-btn.wrong { border-color: var(--danger); background: rgba(239,68,68,0.15); }

.flag-choice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: 0.5rem;
}

.flag-choice-grid .flag-choice {
    padding: 0.35rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    background: var(--bg-secondary);
}

.flag-choice-grid .flag-choice .flag-svg { height: 55px; }
.flag-choice-grid .flag-choice:hover { border-color: var(--accent); }
.flag-choice-grid .flag-choice.correct { border-color: var(--success); }
.flag-choice-grid .flag-choice.wrong { border-color: var(--danger); }

.quiz-prompt {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-align: center;
}

.quiz-prompt strong { color: var(--accent); font-size: 1.4rem; }

.hoist-input {
    width: 100%;
    max-width: 200px;
    margin: 0 auto 1rem;
    display: block;
    padding: 0.75rem;
    font-family: 'Share Tech Mono', monospace;
    font-size: 1.25rem;
    text-align: center;
    text-transform: uppercase;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
}

.score-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin: 1rem 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.score-bar strong { color: var(--accent); }

.timer-display {
    font-family: 'Share Tech Mono', monospace;
    font-size: 2rem;
    color: var(--accent);
    text-align: center;
    margin-bottom: 0.5rem;
}

.btn-row { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; }

.btn {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.feedback {
    text-align: center;
    padding: 0.5rem;
    margin-top: 0.5rem;
    border-radius: 6px;
    font-size: 0.9rem;
}

.feedback.ok { background: rgba(34,197,94,0.15); color: var(--success); }
.feedback.err { background: rgba(239,68,68,0.15); color: var(--danger); }

.hidden { display: none !important; }

.filter-tabs {
    display: flex;
    gap: 0.35rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
}

.filter-tab.active {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-dim);
}