/* ═══════════════════════════════════════════════════════════════════
   Sentence Builder — word-order construction game — styles
   Hero: builder orange #c2410c → #ea580c (distinct from storm blue,
   teal, purple, indigo, rose, emerald, amber, violet, cyan, fuchsia
   used elsewhere)
   Shared by /chs/English/SentenceBuilder and /Pinyin/SentenceBuilder.
   ═══════════════════════════════════════════════════════════════════ */

/* ── Hero / sidebar header ───────────────────────────────────────── */
.sb-hero {
    background: linear-gradient(135deg, #c2410c 0%, #ea580c 100%);
    border-radius: 0.5rem;
}

.sb-panel-header {
    background: linear-gradient(135deg, #c2410c 0%, #ea580c 100%);
    color: #fff;
    border-radius: 0.375rem 0.375rem 0 0;
}

/* ── HUD row above the play area ─────────────────────────────────── */
.sb-hud {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem 1rem;
    margin-bottom: 0.5rem;
}

.sb-hud-item {
    font-weight: 700;
    font-size: 1.05rem;
    line-height: 1.2;
    white-space: nowrap;
}

.sb-hud-item small {
    display: block;
    font-weight: 400;
    font-size: 0.7rem;
    color: var(--bs-secondary-color);
}

.sb-heart {
    color: #ef4444;
    font-size: 1.15rem;
    transition: transform 0.15s;
}

.sb-heart.lost {
    color: #cbd5e1;
    transform: scale(0.85);
}

@keyframes sb-heart-pop {
    0% { transform: scale(1); }
    40% { transform: scale(1.6); }
    100% { transform: scale(0.85); }
}

.sb-heart.popping {
    animation: sb-heart-pop 0.4s ease;
}

.sb-combo-badge {
    display: inline-block;
    min-width: 3.2rem;
    text-align: center;
    background: #f59e0b;
    color: #1f2937;
    border-radius: 999px;
    padding: 0.1rem 0.55rem;
    font-weight: 800;
}

@keyframes sb-combo-bump {
    0% { transform: scale(1); }
    50% { transform: scale(1.25); }
    100% { transform: scale(1); }
}

.sb-combo-badge.bump {
    animation: sb-combo-bump 0.25s ease;
}

/* Round progress bar */
.sb-progress {
    height: 6px;
    border-radius: 999px;
    background: var(--pl-border, #e2e8f0);
    overflow: hidden;
    margin-bottom: 0.6rem;
}

.sb-progress-fill {
    height: 100%;
    width: 0%;
    border-radius: 999px;
    background: linear-gradient(90deg, #c2410c, #ea580c);
    transition: width 0.25s ease;
}

/* ── Play area (the workbench) ───────────────────────────────────── */
.sb-play-area {
    position: relative;
    min-height: clamp(340px, 50vh, 520px);
    border-radius: 0.75rem;
    border: 1px solid var(--pl-border, #fed7aa);
    background: linear-gradient(180deg, #fff7ed 0%, #fffbeb 60%, #fefce8 100%);
    overflow: hidden;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

@keyframes sb-shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-7px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(3px); }
}

.sb-play-area.shaking {
    animation: sb-shake 0.4s ease;
}

/* Prompt sentence to translate */
.sb-prompt-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #c2410c;
    margin-bottom: 0.1rem;
}

.sb-prompt {
    font-size: clamp(1.05rem, 3.6vw, 1.35rem);
    font-weight: 700;
    color: #1e293b;
    line-height: 1.35;
    min-height: 1.4em;
}

/* ── Answer row (built sentence) ─────────────────────────────────── */
.sb-answer-row {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    align-content: flex-start;
    gap: 0.4rem;
    min-height: 66px;
    border: 2px dashed rgba(194, 65, 12, 0.35);
    border-radius: 0.65rem;
    background: rgba(255, 255, 255, 0.65);
    padding: 0.5rem;
}

.sb-slot {
    display: inline-block;
    width: 2.6rem;
    border-bottom: 3px solid rgba(194, 65, 12, 0.3);
    border-radius: 2px;
    margin-top: auto;
    height: 2rem;
}

/* ── Tile bank ───────────────────────────────────────────────────── */
.sb-bank {
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: 0.45rem;
    padding: 0.25rem 0;
    flex-grow: 1;
}

/* ── Word tiles ──────────────────────────────────────────────────── */
.sb-tile {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 2.6rem;
    padding: 0.35rem 0.7rem;
    border: 2px solid #fdba74;
    border-radius: 0.6rem;
    background: var(--pl-card-bg, #ffffff);
    box-shadow: 0 2px 6px rgba(194, 65, 12, 0.12);
    cursor: pointer;
    transition: transform 0.1s, border-color 0.1s, background-color 0.1s, opacity 0.15s;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.sb-tile:hover:not(:disabled) {
    transform: translateY(-2px);
    border-color: #ea580c;
}

.sb-tile .sb-tile-main {
    font-size: clamp(1rem, 3.4vw, 1.25rem);
    font-weight: 700;
    color: #1e293b;
    line-height: 1.2;
}

.sb-tile .sb-tile-sub {
    font-size: 0.72rem;
    color: #64748b;
    line-height: 1.1;
}

.sb-play-area.hide-sub .sb-tile-sub {
    display: none;
}

.sb-tile.used {
    opacity: 0.25;
    cursor: default;
    box-shadow: none;
}

.sb-tile.placed {
    border-color: #ea580c;
    background: #fff7ed;
}

.sb-tile.correct {
    background: #d1e7dd;
    border-color: #198754;
    cursor: default;
}

.sb-tile.correct .sb-tile-main {
    color: #0a3622;
}

@keyframes sb-tile-shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.sb-tile.wrong {
    background: #f8d7da;
    border-color: #dc3545;
    animation: sb-tile-shake 0.3s ease;
}

.sb-tile.wrong .sb-tile-main {
    color: #58151c;
}

.sb-tile.revealed {
    background: #fff3cd;
    border-color: #f59e0b;
    cursor: default;
}

/* ── Floating score / confetti / toast ───────────────────────────── */
.sb-float {
    position: absolute;
    left: 50%;
    top: 40%;
    transform: translate(-50%, 0);
    font-weight: 800;
    font-size: 1.35rem;
    color: #16a34a;
    text-shadow: 0 1px 3px rgba(255, 255, 255, 0.7);
    pointer-events: none;
    z-index: 4;
    animation: sb-float-up 0.9s ease-out forwards;
}

@keyframes sb-float-up {
    to { transform: translate(-50%, -75px); opacity: 0; }
}

.sb-confetti {
    position: absolute;
    top: -14px;
    width: 10px;
    height: 14px;
    border-radius: 2px;
    pointer-events: none;
    z-index: 6;
    animation: sb-confetti-fall linear forwards;
}

@keyframes sb-confetti-fall {
    to { transform: translateY(560px) rotate(660deg); opacity: 0.2; }
}

.sb-toast {
    position: absolute;
    left: 50%;
    top: 8%;
    transform: translateX(-50%);
    background: rgba(194, 65, 12, 0.92);
    color: #fff;
    border-radius: 999px;
    padding: 0.35rem 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    z-index: 5;
    animation: sb-toast-in 2.4s ease forwards;
}

@keyframes sb-toast-in {
    0% { opacity: 0; transform: translateX(-50%) translateY(-8px); }
    12%, 82% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(-8px); }
}

/* ── Overlays (start / round clear / game over) ──────────────────── */
.sb-overlay {
    position: absolute;
    inset: 0;
    z-index: 8;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    text-align: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    overflow-y: auto;
}

.sb-overlay h2,
.sb-overlay h3 {
    margin-bottom: 0;
}

.sb-overlay .sb-big-icon {
    font-size: 2.6rem;
    color: #ea580c;
    line-height: 1;
}

.sb-btn-primary {
    background: linear-gradient(135deg, #c2410c 0%, #ea580c 100%);
    border: none;
    color: #fff;
}

.sb-btn-primary:hover,
.sb-btn-primary:focus {
    color: #fff;
    filter: brightness(1.1);
}

.sb-final-score {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1;
    color: #ea580c;
}

.sb-final-stats {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.4rem 1.4rem;
    font-size: 0.95rem;
}

.sb-final-stats strong {
    font-size: 1.15rem;
}

@keyframes sb-newbest-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.12); }
}

.sb-newbest {
    animation: sb-newbest-pulse 0.9s ease infinite;
}

/* Missed-sentence chips (game-over review + sidebar) */
.sb-chips {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.35rem;
    max-width: 100%;
}

.sb-chip {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(234, 88, 12, 0.08);
    border: 1px solid rgba(234, 88, 12, 0.35);
    border-radius: 0.6rem;
    padding: 0.25rem 0.65rem;
    font-size: 0.85rem;
    text-align: left;
}

.sb-chip .sb-chip-answer {
    color: var(--bs-secondary-color);
    font-size: 0.75rem;
}

/* Sidebar best-score rows */
.sb-best-row {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid var(--pl-border, #f1f5f9);
    padding: 0.3rem 0;
}

.sb-best-row:last-child {
    border-bottom: none;
}

/* Visually hidden live region for screen readers */
.sb-visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* ── Dark mode ───────────────────────────────────────────────────── */
[data-bs-theme="dark"] .sb-play-area {
    background: linear-gradient(180deg, #1c1917 0%, #292524 60%, #2b2320 100%);
    border-color: var(--pl-border, #44403c);
}

[data-bs-theme="dark"] .sb-prompt {
    color: var(--pl-text, #e4e6eb);
}

[data-bs-theme="dark"] .sb-answer-row {
    background: rgba(0, 0, 0, 0.25);
    border-color: rgba(251, 146, 60, 0.35);
}

[data-bs-theme="dark"] .sb-tile {
    background: var(--pl-card-bg, #2b3035);
    border-color: #9a3412;
}

[data-bs-theme="dark"] .sb-tile .sb-tile-main {
    color: var(--pl-text, #e4e6eb);
}

[data-bs-theme="dark"] .sb-tile .sb-tile-sub {
    color: #94a3b8;
}

[data-bs-theme="dark"] .sb-tile.placed {
    background: #3b2a1d;
}

[data-bs-theme="dark"] .sb-tile.correct {
    background: #14532d;
    border-color: #22c55e;
}

[data-bs-theme="dark"] .sb-tile.correct .sb-tile-main {
    color: #dcfce7;
}

[data-bs-theme="dark"] .sb-tile.wrong {
    background: #58151c;
    border-color: #ef4444;
}

[data-bs-theme="dark"] .sb-tile.wrong .sb-tile-main {
    color: #f8d7da;
}

[data-bs-theme="dark"] .sb-tile.revealed {
    background: #453006;
    border-color: #f59e0b;
}

[data-bs-theme="dark"] .sb-overlay {
    background: rgba(20, 16, 14, 0.92);
}

[data-bs-theme="dark"] .sb-float {
    color: #4ade80;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.7);
}

/* ── Reduced motion ──────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .sb-play-area.shaking,
    .sb-tile.wrong,
    .sb-combo-badge.bump,
    .sb-newbest,
    .sb-confetti {
        animation: none;
    }
}