/* ============================================================
   색 상자 모으기 — 스타일
   비주얼: 나무 받침대 + 가는 막대(꼬치) + 가운데 구멍 뚫린
           링 모양 색 블록(폼 누들 절단면 느낌)
   ============================================================ */

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

[hidden] { display: none !important; }

:root {
    --bg: #0f172a;
    --bg-card: #1e293b;
    --bg-card-2: #273347;
    --hairline: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --accent: #2563eb;
    --accent-soft: #3b82f6;
    --wood-light: #d4a574;
    --wood-mid:   #b88554;
    --wood-dark:  #8b6943;
    --radius: 14px;
    --radius-sm: 8px;
    --shadow-card: 0 6px 18px rgba(0, 0, 0, 0.25);
}

/* body는 .game-shell-body (공유 CSS)에서 100dvh flex column 처리 */
body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Noto Sans KR', 'Pretendard Variable', sans-serif;
}

#app {
    flex: 1 1 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    padding: 0.5rem 0.75rem;
}

.screen {
    flex: 1 1 0;
    min-height: 0;
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    animation: fadeIn 0.25s ease;
}

#screen-menu {
    justify-content: center;
    gap: 1.25rem;
}

#screen-play {
    display: grid;
    grid-template-rows: auto 1fr auto;
    align-items: center;
    gap: 0.75rem;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── 시작 화면 ─────────────────────────────────────── */
.menu-header { text-align: center; margin: 2rem 0 1rem; }
.menu-title { font-size: 2.1rem; font-weight: 900; margin-bottom: 0.6rem; }
.menu-subtitle { color: var(--text-muted); font-size: 0.98rem; line-height: 1.6; }
.menu-subtitle b { color: var(--text); }

.primary-btn {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 999px;
    padding: 0.95rem 2rem;
    font-size: 1.05rem;
    font-weight: 800;
    font-family: inherit;
    cursor: pointer;
    transition: transform 0.1s, background 0.15s;
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}
.primary-btn:hover { background: #1d4ed8; }
.primary-btn:active { transform: scale(0.97); }

.ghost-btn {
    background: transparent;
    color: var(--text);
    border: 1.5px solid var(--hairline);
    border-radius: 999px;
    padding: 0.85rem 1.6rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}
.ghost-btn:hover { background: var(--bg-card-2); border-color: var(--accent-soft); }

.howto {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius);
    padding: 0.85rem 1.1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}
.howto summary {
    cursor: pointer;
    font-weight: 700;
    color: var(--text);
    list-style: none;
    user-select: none;
}
.howto summary::after { content: ' ▾'; color: var(--text-muted); font-size: 0.85em; }
.howto[open] summary::after { content: ' ▴'; }
.howto ul { margin-top: 0.6rem; padding-left: 1.25rem; line-height: 1.7; }
.howto b { color: var(--text); }

/* ── 플레이 화면 ──────────────────────────────────── */
.play-topbar {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius);
    padding: 0.5rem 1rem;
    padding-left: 6rem; /* 좌측 back-pill 공간 */
}
.topbar-stat { display: inline-flex; align-items: baseline; gap: 0.4rem; white-space: nowrap; }
.stat-label { color: var(--text-muted); font-size: 0.82rem; font-weight: 700; }
.topbar-stat strong { font-size: 1.1rem; font-weight: 900; color: var(--text); }
.play-topbar .topbar-stat:nth-of-type(2) {
    font-size: 0.82rem;
    color: var(--text-muted);
}
.play-topbar .topbar-stat:nth-of-type(2) strong {
    font-size: 0.9rem;
    font-weight: 700;
}

/* ── 막대/링 비주얼 ──────────────────────────────── */
.rod-area {
    position: relative;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 22px;
    padding: 28px 18px 34px;     /* 아래쪽 padding은 base 높이만큼 */
    min-height: 280px;
}

/* 나무 받침대 — 모든 막대가 그 위에 박혀 있는 듯한 느낌 */
.rod-base {
    position: absolute;
    left: 3%;
    right: 3%;
    bottom: 6px;
    height: 22px;
    background:
        repeating-linear-gradient(90deg,
            rgba(0,0,0,0.04) 0 2px,
            transparent 2px 14px),
        linear-gradient(180deg,
            var(--wood-light) 0%,
            var(--wood-mid) 55%,
            var(--wood-dark) 100%);
    border-radius: 5px;
    box-shadow:
        0 8px 18px rgba(0, 0, 0, 0.45),
        inset 0 2px 4px rgba(255, 255, 255, 0.18),
        inset 0 -3px 6px rgba(0, 0, 0, 0.3);
    z-index: 0;
}

.rod {
    position: relative;
    width: var(--block-w, 46px);
    height: calc(var(--block-h, 38px) * var(--capacity, 5) + 18px); /* +18 = 막대 끝 노출 */
    display: flex;
    flex-direction: column-reverse;   /* index 0 = 바닥 → 시각적 아래 */
    align-items: center;
    margin-bottom: 22px;               /* base 위에 박혀 보이도록 */
    cursor: pointer;
    z-index: 2;
    transition: transform 0.12s ease;
}

/* 꼬치(나무 막대) — 블록 뒤에 깔리는 가는 막대 */
.rod::before {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -22px;                     /* 받침대 안으로 살짝 들어감 */
    width: 6px;
    height: calc(100% + 22px);
    background: linear-gradient(180deg,
        #e3b88a 0%,
        var(--wood-light) 35%,
        var(--wood-mid) 80%,
        var(--wood-dark) 100%);
    border-radius: 3px 3px 1px 1px;
    transform: translateX(-50%);
    box-shadow:
        inset -1.5px 0 2px rgba(0, 0, 0, 0.25),
        inset 1.5px 0 2px rgba(255, 255, 255, 0.18);
    z-index: 1;
}

.rod:hover { transform: translateY(-2px); }
.rod.selected { transform: translateY(-4px); }
.rod.invalid-shake { animation: rodShake 0.32s; }

@keyframes rodShake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-5px); }
    40% { transform: translateX(5px); }
    60% { transform: translateX(-3px); }
    80% { transform: translateX(3px); }
}

/* 색 블록 — 가운데 구멍이 있는 도넛(링) 모양.
 * 실제로는 막대를 가운데로 통과시키는 효과 = 위에서 보면 캡슐 모양
 * + 좌우 살짝 음영 + 가운데 어두운 슬릿(구멍 살짝 보이는 느낌). */
.block {
    position: relative;
    width: 100%;
    height: var(--block-h, 38px);
    border-radius: 999px;
    background:
        radial-gradient(ellipse at 50% 35%,
            rgba(255,255,255,0.35) 0%,
            rgba(255,255,255,0) 55%),
        var(--block-color, #888);
    box-shadow:
        inset 0 -4px 6px rgba(0, 0, 0, 0.22),
        inset 0 3px 5px rgba(255, 255, 255, 0.25),
        0 2px 4px rgba(0, 0, 0, 0.3);
    z-index: 2;
    transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

/* 블록 가운데 살짝 어두운 슬릿 = 막대 구멍 흔적 */
.block::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 6px;
    height: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(180deg,
        rgba(0, 0, 0, 0.25),
        rgba(0, 0, 0, 0.35));
    border-radius: 3px;
    box-shadow: inset 0 0 1px rgba(0, 0, 0, 0.4);
    z-index: 0;          /* 블록 안에서만 보임 */
    opacity: 0.55;
}

/* 선택된 막대 — 가장 위 블록이 살짝 떠오름 (잔존 / 픽업 전 단계용) */
.rod.selected .block:last-child {
    transform: translateY(-14px);
    box-shadow:
        inset 0 -4px 6px rgba(0, 0, 0, 0.2),
        inset 0 3px 5px rgba(255, 255, 255, 0.3),
        0 10px 16px rgba(0, 0, 0, 0.45);
    filter: brightness(1.08);
}

/* 카드를 손에 든 상태에서 도착지 후보 막대 */
.rod.drop-target::before {
    background: linear-gradient(180deg,
        #fde68a 0%,
        #fbbf24 60%,
        #b45309 100%);
    box-shadow:
        inset -2px 0 4px rgba(0, 0, 0, 0.3),
        inset 2px 0 4px rgba(255, 255, 255, 0.45),
        0 0 12px rgba(251, 191, 36, 0.55);
}

/* 들고 있는 경단 — 커서를 따라(막대 중심 X로 스냅) 움직임 */
.picked-bead {
    position: absolute;
    width: var(--block-w, 64px);
    height: var(--block-h, 24px);
    border-radius: 999px;
    background:
        radial-gradient(ellipse at 50% 35%,
            rgba(255,255,255,0.35) 0%,
            rgba(255,255,255,0) 55%),
        var(--block-color, #888);
    box-shadow:
        inset 0 -4px 6px rgba(0, 0, 0, 0.22),
        inset 0 3px 5px rgba(255, 255, 255, 0.3),
        0 12px 22px rgba(0, 0, 0, 0.55);
    pointer-events: none;
    z-index: 50;
    transition: left 0.13s ease-out, top 0.13s ease-out;
    transform: translateX(-50%);
    animation: pickedFloat 1.6s ease-in-out infinite;
}
.picked-bead::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 6px;
    height: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(180deg,
        rgba(0, 0, 0, 0.25),
        rgba(0, 0, 0, 0.35));
    border-radius: 3px;
    opacity: 0.45;
}

@keyframes pickedFloat {
    0%, 100% { translate: 0 0; }
    50% { translate: 0 -3px; }
}

/* 도착 예정 위치를 표시하는 슬릿 (옅은 점선) */
.drop-indicator {
    position: absolute;
    width: var(--block-w, 64px);
    height: var(--block-h, 24px);
    border: 2px dashed rgba(253, 224, 71, 0.65);
    border-radius: 999px;
    pointer-events: none;
    z-index: 3;
    transform: translateX(-50%);
    transition: left 0.13s ease-out, top 0.13s ease-out;
    background: rgba(253, 224, 71, 0.08);
}

.play-controls {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.6rem;
    margin-top: 0;
}
.ctrl-btn {
    background: var(--bg-card);
    color: var(--text);
    border: 1.5px solid var(--hairline);
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.5rem;
    font-size: 0.9rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, transform 0.08s;
}
.ctrl-btn:hover { background: var(--bg-card-2); border-color: var(--accent-soft); }
.ctrl-btn:active { transform: scale(0.97); }
.ctrl-btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* ── 오버레이/모달 ──────────────────────────────────── */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1500;
    animation: fadeIn 0.2s ease;
    padding: 1rem;
}
.overlay-card {
    background: var(--bg-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius);
    padding: 2rem 1.75rem 1.75rem;
    width: 100%;
    max-width: 360px;
    text-align: center;
    box-shadow: var(--shadow-card);
}
.overlay-confetti { font-size: 2.6rem; margin-bottom: 0.5rem; }
.overlay-title { font-size: 1.5rem; font-weight: 900; margin-bottom: 0.5rem; }
.overlay-msg { color: var(--text-muted); margin-bottom: 1.4rem; line-height: 1.55; }
.overlay-msg #clear-moves { color: var(--text); font-weight: 900; font-size: 1.1em; }
.overlay-actions {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    align-items: stretch;
}

/* ── 반응형 ───────────────────────────────────────── */
@media (max-width: 540px) {
    .menu-title { font-size: 1.7rem; }
    .rod-area { gap: 14px; padding: 24px 8px 30px; }
    .play-controls { grid-template-columns: 1fr 1fr; }
    .play-controls .ctrl-btn:nth-child(3) { grid-column: 1 / -1; }
}