/* ========================================================
   자리 배치 뽑기 — "교실 칠판" 디자인
   - 칠판에 분필로 좌석표를 그리고, 이름이 하나씩 채워지는 모습을 모티프로 가져왔다.
   - 시그니처: 좌석 격자가 순서대로 "착석" 팝 애니메이션과 함께 채워지며, 분필 느낌의 은은한 글로우 텍스트.
   - 지금까지의 다크 팔레트(동전/발권기/드래프트)와 구분되는 채도 낮은 그린 칠판 + 따뜻한 나무 데스크 톤.
   ======================================================== */

.seat-container {
    --se-board: #16362a;
    --se-board-light: #1f4636;
    --se-chalk: #f5f6f0;
    --se-chalk-yellow: #fde68a;
    --se-desk: #c9a876;
    --se-desk-dark: #8a6d42;
    --se-muted: rgba(245, 246, 240, 0.55);

    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.seat-container .hidden { display: none !important; }

.se-eyebrow {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--se-board);
    background: var(--se-chalk-yellow);
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    margin-bottom: 0.9rem;
}

.seat-container .page-header {
    background:
        repeating-linear-gradient(0deg, rgba(255,255,255,0.02) 0 1px, transparent 1px 26px),
        linear-gradient(180deg, var(--se-board-light), var(--se-board));
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 18px;
}

.seat-container .page-header::before { display: none; }

.seat-container .page-header h1 {
    font-family: 'Black Han Sans', -apple-system, sans-serif;
    font-weight: 400;
    color: var(--se-chalk);
    -webkit-text-fill-color: var(--se-chalk);
    background: none;
    text-shadow: 0 0 10px rgba(245, 246, 240, 0.25);
}

.seat-container .page-header .description { color: var(--se-muted); }

/* ── 카드 ── */
.seat-container .tool-section.card {
    background: var(--se-board-light);
    border: 1px solid rgba(255,255,255,0.08);
    color: var(--se-chalk);
}

.seat-container .tool-section.card:hover {
    box-shadow: 0 10px 40px rgba(0,0,0,0.4), 0 0 0 1px rgba(253, 230, 138, 0.14);
}

.seat-container .tool-section h2 { color: var(--se-chalk); border-bottom-color: rgba(255,255,255,0.1); }
.seat-container .tool-section h2::after { background: var(--se-chalk-yellow); }
.seat-container .helper-text { color: var(--se-muted); }
.seat-container .tool-guide-text { color: rgba(245, 246, 240, 0.72); }

.seat-container .tool-intro-card,
.seat-container .tool-usage-steps li,
.seat-container .tool-example-card,
.seat-container .tool-usecase-chip,
.seat-container .tool-related-card {
    background: rgba(255,255,255,0.05) !important;
    color: var(--se-chalk) !important;
}

.seat-container .tool-intro-card h4,
.seat-container .tool-example-arrow,
.seat-container .tool-usecase-chip strong,
.seat-container .tool-related-card .tool-related-name {
    color: var(--se-chalk-yellow) !important;
}

.seat-container .tool-intro-card p,
.seat-container .tool-example-card .tool-example-label,
.seat-container .tool-related-card .tool-related-desc,
.seat-container .tool-meta-bar {
    color: var(--se-muted) !important;
}

.seat-container .tool-example-card .tool-example-input,
.seat-container .tool-example-card .tool-example-output {
    background: rgba(0,0,0,0.22);
    border-color: rgba(255,255,255,0.1);
    color: var(--se-chalk);
}

.seat-container .tool-meta-bar { border-top-color: rgba(255,255,255,0.1); }
.seat-container .tool-meta-bar span strong { color: var(--se-chalk); }
.seat-container .tool-guide-section h2 { color: var(--se-chalk); }

.seat-container .tool-faq-item { background: rgba(255,255,255,0.05); }
.seat-container .tool-faq-item dt { color: var(--se-chalk); }
.seat-container .tool-faq-item dt::before { color: var(--se-chalk-yellow); }
.seat-container .tool-faq-item dd { color: var(--se-muted); }
.seat-container .tool-faq-item dd::before { color: #86efac; }

/* ── 참가자 칩 입력 ── */
.se-chip-input-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.9rem;
    border: 2px dashed rgba(255,255,255,0.18);
    border-radius: 12px;
    background: rgba(0,0,0,0.18);
    min-height: 60px;
    align-items: center;
}

.se-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--se-chalk-yellow);
    color: var(--se-board);
    padding: 0.4rem 0.5rem 0.4rem 0.9rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.9rem;
    animation: seChipPop 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes seChipPop {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.se-chip-remove {
    background: rgba(0,0,0,0.15);
    border: none;
    color: var(--se-board);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.75rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.se-chip-remove:hover { background: #b91c1c; color: #fff; }

.se-chip-text-input {
    flex: 1;
    min-width: 140px;
    border: none;
    background: transparent;
    padding: 0.5rem 0.2rem;
    font-size: 0.98rem;
    color: var(--se-chalk);
    outline: none;
}

.se-chip-text-input::placeholder { color: rgba(245, 246, 240, 0.35); }

.se-chip-count { font-size: 0.85rem; font-weight: 700; color: var(--se-muted); margin-top: 0.6rem; }

/* ── 분단 수 스텝퍼 ── */
.se-count-stepper { display: flex; align-items: center; gap: 0.6rem; }

.se-count-step-btn {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    border-radius: 50%;
    border: 2px dashed rgba(255,255,255,0.18);
    background: rgba(0,0,0,0.18);
    color: var(--se-chalk);
    font-weight: 700;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.18s ease;
}

.se-count-step-btn:hover { border-color: var(--se-chalk-yellow); color: var(--se-chalk-yellow); }

.se-count-value {
    width: 76px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--se-chalk);
    background: rgba(0,0,0,0.18);
    border: 2px dashed rgba(255,255,255,0.18);
    border-radius: 10px;
}

.se-count-unit { font-weight: 700; color: var(--se-chalk); }

/* ── 책상 배치(1인/짝꿍) 토글 ── */
.se-desk-toggle-row { display: flex; gap: 0.6rem; flex-wrap: wrap; }

.se-desk-toggle-btn {
    flex: 1;
    min-width: 140px;
    padding: 0.7rem 1rem;
    border: 2px dashed rgba(255,255,255,0.18);
    border-radius: 12px;
    background: rgba(0,0,0,0.18);
    color: var(--se-muted);
    font-weight: 700;
    font-size: 0.92rem;
    cursor: pointer;
    text-align: center;
    transition: all 0.15s ease;
}

.se-desk-toggle-btn:hover { border-color: var(--se-chalk-yellow); }

.se-desk-toggle-btn.active {
    border-style: solid;
    border-color: var(--se-chalk-yellow);
    background: rgba(253, 230, 138, 0.12);
    color: var(--se-chalk);
}

/* ── 버튼 ── */
.seat-container .btn-generate {
    background: var(--se-chalk-yellow);
    color: var(--se-board);
    border: none;
    font-weight: 800;
    box-shadow: 0 6px 18px rgba(253, 230, 138, 0.28);
}

.seat-container .btn-generate:hover { filter: brightness(1.05); box-shadow: 0 8px 24px rgba(253, 230, 138, 0.38); }
.seat-container .btn-generate:disabled { opacity: 0.5; box-shadow: none; }

.seat-container .clear-btn {
    background: rgba(255,255,255,0.06);
    color: var(--se-chalk);
    border: 1px solid rgba(255,255,255,0.15);
}
.seat-container .clear-btn:hover { background: rgba(255,255,255,0.12); }

.seat-container .copy-btn {
    background: var(--se-chalk-yellow);
    color: var(--se-board);
    box-shadow: 0 4px 12px rgba(253, 230, 138, 0.25);
}

.seat-container .error-message {
    background: rgba(178, 58, 46, 0.16);
    color: #e6857a;
    border-left: 4px solid #b23a2e;
}

.seat-container .ticket-stub {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(253, 230, 138, 0.3);
}

.share-link-row { display: flex; gap: 0.6rem; margin-bottom: 1rem; flex-wrap: wrap; }
.share-link-row .share-link-input { flex: 1; min-width: 200px; }

.seat-container .share-link-input {
    background: rgba(0,0,0,0.22);
    border: 1px solid rgba(255,255,255,0.12);
    color: var(--se-chalk);
    padding: 0.7rem 0.9rem;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 0.88rem;
}

/* ============================================================
   좌석표 (시그니처 요소)
   격자로 배치된 좌석이 순서대로 "착석" 팝 애니메이션과 함께 채워진다.
   ============================================================ */
.se-front-indicator {
    text-align: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--se-muted);
    letter-spacing: 0.15em;
    padding-bottom: 0.6rem;
    margin-bottom: 1rem;
    border-bottom: 2px dashed rgba(255,255,255,0.15);
}

.se-grid {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    overflow-x: auto;
    padding-bottom: 0.3rem;
}

.se-row {
    display: flex;
    justify-content: center;
    gap: 1.5rem; /* 분단 사이 통로 */
}

.se-desk {
    display: flex;
    gap: 3px; /* 짝꿍끼리는 거의 붙어있게 */
    background: rgba(0,0,0,0.12);
    border-radius: 12px;
    padding: 4px;
}

.se-seat {
    width: 72px;
    aspect-ratio: 1 / 0.85;
    flex-shrink: 0;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    position: relative;
    background: rgba(0,0,0,0.18);
    border: 2px dashed rgba(255,255,255,0.18);
    transition: background 0.2s ease, border-color 0.2s ease;
}

/* 짝꿍 책상에서는 두 좌석이 하나의 책상처럼 보이도록 안쪽 모서리를 둥글지 않게 */
.se-desk .se-seat:first-child:nth-last-child(2) { border-radius: 10px 3px 3px 10px; }
.se-desk .se-seat:last-child:nth-child(2) { border-radius: 3px 10px 10px 3px; }

.se-seat-number {
    position: absolute;
    top: 6px;
    left: 8px;
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--se-muted);
}

.se-seat-icon { font-size: 1.3rem; opacity: 0.35; }

.se-seat-name {
    font-weight: 700;
    font-size: 0.92rem;
    color: var(--se-chalk);
    text-align: center;
    padding: 0 0.3rem;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-shadow: 0 0 6px rgba(245, 246, 240, 0.4);
}

.se-seat.se-filled {
    background: linear-gradient(180deg, var(--se-desk), var(--se-desk-dark));
    border: 2px solid var(--se-desk-dark);
    animation: seSeatPop 0.4s cubic-bezier(0.2, 1.4, 0.4, 1);
}

.se-seat.se-filled .se-seat-name { color: #241a0d; text-shadow: none; }
.se-seat.se-filled .se-seat-number { color: rgba(36, 26, 13, 0.6); }

/* 격자 칸 수가 인원수보다 많을 때(예: 24명 -> 5x5) 남는 칸은 처음부터 빈 좌석으로 고정 표시 */
.se-seat.se-seat-unused {
    border-style: solid;
    border-color: rgba(255,255,255,0.06);
    background: rgba(0,0,0,0.1);
}

@keyframes seSeatPop {
    0% { transform: scale(0.7); opacity: 0.4; }
    55% { transform: scale(1.08); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

.se-progress-text { text-align: center; font-weight: 700; color: var(--se-muted); margin-top: 0.8rem; font-size: 0.9rem; }

.se-complete-banner {
    text-align: center;
    padding: 1rem;
    margin-top: 1.2rem;
    border: 2px dashed var(--se-chalk-yellow);
    border-radius: 12px;
    background: rgba(253, 230, 138, 0.08);
    color: var(--se-chalk);
    font-weight: 700;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.se-complete-banner.show { opacity: 1; transform: translateY(0); }

/* ── 내가 만든 자리배치 ── */
.se-my-games-list { display: flex; flex-direction: column; gap: 0.5rem; }

.se-my-game-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.6rem 0.9rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    text-decoration: none;
    color: var(--se-chalk);
    font-size: 0.85rem;
    font-weight: 600;
}

.se-my-game-item:hover { border-color: rgba(253, 230, 138, 0.4); background: rgba(255,255,255,0.08); }
.se-my-game-serial { font-family: 'Courier New', monospace; font-weight: 700; color: var(--se-muted); }
.se-my-game-arrow { margin-left: auto; color: var(--se-chalk-yellow); font-weight: 700; }

.se-my-games-rest { margin-top: 0.55rem; }
.se-my-games-rest.hidden { display: none; }

.se-my-games-more-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin-top: 0.7rem;
    padding: 0.55rem 1rem;
    background: transparent;
    border: 2px dashed rgba(255,255,255,0.18);
    border-radius: 10px;
    color: var(--se-muted);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s ease;
}

.se-my-games-more-btn:hover {
    border-style: solid;
    border-color: var(--se-chalk-yellow);
    color: var(--se-chalk-yellow);
    background: rgba(255,255,255,0.06);
}

/* ── 반응형 ── */
@media (max-width: 768px) {
    .seat-container .page-header h1 { font-size: 1.9rem; }
    .se-grid { gap: 0.5rem; }
    .se-row { gap: 1rem; }
    .se-seat { width: 58px; }
    .se-seat-name { font-size: 0.78rem; }
    .se-seat-icon { font-size: 1rem; }
    .share-link-row { flex-direction: column; }
}

@media (max-width: 480px) {
    .seat-container .page-header h1 { font-size: 1.55rem; }
    .se-eyebrow { font-size: 0.65rem; }
    .se-chip-text-input { min-width: 100px; font-size: 0.95rem; }
    .se-row { gap: 0.6rem; }
    .se-seat { width: 48px; }
    .se-seat-name { font-size: 0.66rem; }
    .se-seat-number { font-size: 0.58rem; }
    .se-count-stepper { flex-wrap: wrap; }
}