/* ============================================================
   Components — Shared UI Elements
   ============================================================ */

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition-fast);
    gap: var(--space-xs);
    user-select: none;
    -webkit-user-select: none;
}

.btn:active {
    transform: scale(0.96);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dim));
    color: var(--color-bg);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    box-shadow: 0 0 24px rgba(0, 212, 255, 0.5);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--color-surface-2);
    color: var(--color-text);
    border: 1px solid var(--color-surface-3);
}

.btn-secondary:hover {
    background: var(--color-surface-3);
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}

.btn-lg {
    padding: var(--space-md) var(--space-lg);
    font-size: 1.1rem;
    border-radius: var(--radius-lg);
}

.btn-sm {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.85rem;
}

/* ---- Game Card (hub page) ---- */
.game-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-md);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-surface-2);
    transition: all var(--transition-normal);
    text-decoration: none;
    color: var(--color-text);
    cursor: pointer;
    aspect-ratio: 1 / 1;
    min-height: 180px;
}

.game-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
    text-decoration: none;
}

.game-card-icon {
    width: 56px;
    height: 56px;
    color: var(--color-primary);
}

.game-card-icon svg {
    width: 100%;
    height: 100%;
}

.game-card-title {
    font-size: 1.2rem;
    font-weight: 700;
}

.game-card-subtitle {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* ---- Game Header (individual game pages) ---- */
.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-surface-2);
    height: 56px;
    position: sticky;
    top: 0;
    z-index: var(--z-dropdown);
}

.game-header-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.back-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.back-btn:hover {
    background: var(--color-surface-2);
    color: var(--color-text);
    text-decoration: none;
}

.back-btn svg {
    width: 20px;
    height: 20px;
}

.game-title-header {
    font-size: 1.1rem;
    font-weight: 700;
}

.game-score-display {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-surface-2);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
}

/* ---- Modal ---- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal {
    background: var(--color-surface);
    border: 1px solid var(--color-surface-2);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    min-width: 300px;
    max-width: 90vw;
    box-shadow: var(--shadow-lg);
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.modal-score {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-gold);
    margin-bottom: var(--space-lg);
}

.modal-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
}

/* ---- Utility: Hidden ---- */
.hidden {
    display: none !important;
}

/* ---- Game Rules / Help ---- */
.game-rules {
    max-width: 420px;
    margin: var(--space-md) auto 0;
    padding: var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-surface-2);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.game-rules h3 {
    font-size: 0.9rem;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.game-rules kbd {
    display: inline-block;
    padding: 1px 6px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-surface-3);
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text);
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
    .game-header {
        padding: var(--space-sm);
        height: 48px;
    }
    .game-title-header {
        font-size: 1rem;
    }
    .modal {
        min-width: auto;
        width: calc(100vw - 32px);
    }
}