:root {
    --bg: #0b1028;
    --bg2: #151d45;
    --card: rgba(255,255,255,.09);
    --card-strong: rgba(255,255,255,.14);
    --line: rgba(255,255,255,.18);
    --text: #f7f2ff;
    --muted: #c9c1df;
    --accent: #ffd56f;
    --accent2: #9ce7ff;
    --danger: #ff7890;
    --shadow: 0 18px 60px rgba(0,0,0,.36);
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); }
body {
    margin: 0;
    min-height: 100%;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 20% 5%, rgba(255, 213, 111, .26), transparent 28rem),
        radial-gradient(circle at 86% 18%, rgba(156, 231, 255, .22), transparent 26rem),
        linear-gradient(135deg, #080b1f 0%, #142054 55%, #24153e 100%);
}

button, input { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .55; }

.app-shell {
    width: min(1180px, calc(100% - 28px));
    margin: 0 auto;
    padding: 24px 0 48px;
}

.hero {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: center;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(255,255,255,.13), rgba(255,255,255,.05));
    box-shadow: var(--shadow);
}
.hero h1 {
    margin: 3px 0 8px;
    font-size: clamp(2rem, 5vw, 4rem);
    letter-spacing: .05em;
    line-height: 1.05;
}

.hero-logo-title {
    margin: 0 0 10px;
    line-height: 0;
}
.hero-logo {
    display: block;
    width: min(720px, 100%);
    max-height: 210px;
    object-fit: contain;
    object-position: left center;
    filter: drop-shadow(0 18px 34px rgba(0,0,0,.32));
}
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}
.hero p { margin: 0; color: var(--muted); line-height: 1.8; }
.eyebrow {
    color: var(--accent) !important;
    font-size: .82rem;
    text-transform: uppercase;
    letter-spacing: .18em;
}
.hero__badge {
    min-width: 160px;
    padding: 18px;
    border-radius: 24px;
    text-align: center;
    background: rgba(0,0,0,.20);
    border: 1px solid var(--line);
}
.hero__badge span { display:block; color: var(--muted); font-size: .86rem; }
.hero__badge strong { display:block; margin-top: 6px; color: var(--accent); font-size: 1.25rem; }

.game-layout {
    display: grid;
    grid-template-columns: minmax(320px, 1fr) 340px;
    gap: 18px;
    margin-top: 18px;
    align-items: start;
}

.board-card,
.info-card,
.feature-grid article {
    border: 1px solid var(--line);
    border-radius: 24px;
    background: var(--card);
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.board-card { padding: 16px; }
.board-toolbar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 12px;
}
.board-toolbar > div {
    padding: 12px;
    border-radius: 18px;
    background: rgba(0,0,0,.20);
    border: 1px solid rgba(255,255,255,.12);
}
.label { display: block; color: var(--muted); font-size: .78rem; margin-bottom: 2px; }
.board-toolbar strong { font-size: clamp(1.2rem, 4vw, 1.75rem); color: #fff; }
.time-limit-box.is-warning { border-color: rgba(255, 120, 144, .72); background: rgba(255, 120, 144, .16); }
.time-limit-box.is-warning strong { color: var(--danger); }
.time-limit-box.is-stopped strong { color: var(--muted); }

.canvas-wrap {
    position: relative;
    width: min(100%, 540px);
    margin: 0 auto;
    border-radius: 26px;
    overflow: hidden;
    background: linear-gradient(180deg, rgba(15, 20, 50, .96), rgba(19, 27, 70, .94));
    border: 1px solid rgba(255,255,255,.18);
    touch-action: none;
}
#gameCanvas {
    display: block;
    width: 100%;
    height: auto;
}
.drop-guide {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, rgba(255,213,111,.8), transparent);
    pointer-events: none;
    opacity: .65;
    transform: translateX(-1px);
}

.danger-status {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 14px;
    z-index: 2;
    padding: 9px 12px;
    border-radius: 14px;
    background: rgba(255, 120, 144, .18);
    border: 1px solid rgba(255, 120, 144, .55);
    color: #fff4f6;
    font-weight: 700;
    text-align: center;
    box-shadow: 0 10px 28px rgba(0,0,0,.25);
    pointer-events: none;
}
.danger-status[hidden] { display: none !important; }

.game-over-panel {
    position: absolute;
    inset: 20px;
    display: grid;
    place-items: center;
    align-content: center;
    gap: 10px;
    padding: 22px;
    border-radius: 24px;
    text-align: center;
    background: rgba(8, 11, 31, .86);
    border: 1px solid rgba(255,255,255,.22);
    box-shadow: var(--shadow);
}
.game-over-panel[hidden] { display: none !important; }
.game-over-panel h2 { margin: 0; font-size: clamp(1.5rem, 5vw, 2.3rem); }
.game-over-panel p { margin: 0; color: var(--muted); }
.panel-kicker { color: var(--accent) !important; letter-spacing: .16em; font-size: .82rem; }
.name-field {
    width: min(320px, 100%);
    display: grid;
    gap: 6px;
    text-align: left;
    color: var(--muted);
}
.name-field input {
    width: 100%;
    border: 1px solid rgba(255,255,255,.25);
    border-radius: 14px;
    padding: 11px 13px;
    color: var(--text);
    background: rgba(255,255,255,.10);
    outline: none;
}
.name-field input:focus { border-color: var(--accent); }
.panel-actions, .control-row, .mobile-actions, .card-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}
.small-note { min-height: 1.5em; }

.primary-btn, .ghost-btn, .mini-btn {
    border: 0;
    border-radius: 999px;
    padding: 12px 18px;
    color: #1a1531;
    background: linear-gradient(135deg, #ffe49b, #ffb95f);
    box-shadow: 0 8px 24px rgba(255, 185, 95, .22);
    font-weight: 700;
}
.ghost-btn, .mini-btn {
    color: var(--text);
    background: rgba(255,255,255,.12);
    border: 1px solid rgba(255,255,255,.18);
    box-shadow: none;
}
.mini-btn { padding: 8px 12px; font-size: .86rem; }

.mobile-actions { display: none; margin-top: 12px; }
.mobile-actions button { flex: 1 1 150px; }

.side-panel { display: grid; gap: 14px; }
.info-card { padding: 18px; }
.info-card h2 { margin: 0 0 10px; font-size: 1.12rem; }
.info-card p, .info-card li { color: var(--muted); line-height: 1.7; }
.info-card ul { padding-left: 1.25em; margin: 10px 0 16px; }
.next-card { text-align: center; }
#nextCanvas { width: 150px; height: 110px; display: block; margin: 4px auto; }
#nextName { margin: 0; color: var(--accent); font-weight: 700; }

.growth-card strong { color: var(--accent); }
.growth-guide {
    display: grid;
    gap: 8px;
    margin-top: 12px;
}
.growth-row {
    display: grid;
    grid-template-columns: auto 1fr auto 1fr;
    gap: 8px;
    align-items: center;
    padding: 8px 10px;
    border-radius: 14px;
    background: rgba(0,0,0,.16);
}
.growth-dot {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    box-shadow: inset 0 0 0 2px rgba(255,255,255,.22), 0 4px 10px rgba(0,0,0,.22);
}
.growth-name {
    color: var(--text);
    font-size: .9rem;
}
.growth-name .growth-dot {
    display: inline-block;
    vertical-align: middle;
    margin-right: 4px;
}
.growth-arrow {
    color: var(--accent);
    font-weight: 800;
}
.card-title-row { justify-content: space-between; }
.ranking-list {
    margin: 12px 0 0;
    padding-left: 1.5em;
}
.ranking-list li {
    margin: 8px 0;
    padding: 8px 10px;
    border-radius: 12px;
    background: rgba(0,0,0,.16);
}
.ranking-list strong { color: #fff; }
.ranking-list time { display:block; font-size:.75rem; color: rgba(255,255,255,.55); }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-top: 18px;
}
.feature-grid article { padding: 18px; }
.feature-grid h2 { margin: 0 0 8px; font-size: 1.05rem; color: var(--accent2); }
.feature-grid p { margin: 0; color: var(--muted); line-height: 1.8; }


.site-footer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 18px;
    color: rgba(255,255,255,.62);
    font-size: .86rem;
}
.site-footer small { color: rgba(255,255,255,.44); }
.portal-footer-link {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 213, 111, .42);
}
.portal-footer-link:hover { color: #fff0a8; border-bottom-color: currentColor; }

@media (max-width: 920px) {
    .game-layout { grid-template-columns: 1fr; }
    .side-panel { grid-template-columns: repeat(2, 1fr); }
    .ranking-card { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
    .hero-logo { max-height: 150px; }
    .app-shell { width: min(100% - 18px, 1180px); padding-top: 10px; }
    .hero { align-items: stretch; flex-direction: column; border-radius: 22px; padding: 16px; }
    .hero__badge { width: 100%; }
    .board-card { padding: 10px; border-radius: 20px; }
    .board-toolbar { gap: 7px; grid-template-columns: repeat(2, 1fr); }
    .board-toolbar > div { padding: 9px; }
    .canvas-wrap { border-radius: 20px; }
    .mobile-actions { display: flex; }
    .side-panel, .feature-grid { grid-template-columns: 1fr; }
    .info-card { border-radius: 20px; padding: 15px; }
    .game-over-panel { inset: 10px; padding: 16px; }
    .danger-status { left: 10px; right: 10px; top: 10px; font-size: .9rem; }
    .growth-row { grid-template-columns: auto 1fr; }
    .growth-arrow { grid-column: 1 / -1; text-align: center; }
}

.ranking-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 10px 0 2px;
}
.ranking-tab {
    border: 1px solid rgba(255,255,255,.16);
    border-radius: 999px;
    padding: 7px 10px;
    color: var(--text);
    background: rgba(255,255,255,.08);
    font-size: .82rem;
    font-weight: 700;
}
.ranking-tab.is-active {
    color: #1a1531;
    background: linear-gradient(135deg, #ffe49b, #ffb95f);
    border-color: transparent;
}
.guide-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-top: 18px;
}
.guide-card {
    border: 1px solid var(--line);
    border-radius: 24px;
    background: var(--card);
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
    padding: 18px;
}
.guide-card h2 { margin: 0 0 8px; color: var(--accent2); font-size: 1.05rem; }
.guide-card p, .guide-card li { color: var(--muted); line-height: 1.8; }
.guide-card ul { margin: 8px 0 0; padding-left: 1.25em; }
.faq-card details {
    border-top: 1px solid rgba(255,255,255,.12);
    padding: 10px 0;
}
.faq-card details:first-of-type { border-top: 0; }
.faq-card summary { cursor: pointer; font-weight: 700; color: var(--text); }
.faq-card p { margin: 8px 0 0; }
@media (max-width: 920px) {
    .guide-section { grid-template-columns: 1fr; }
}
button:focus-visible, input:focus-visible, summary:focus-visible {
    outline: 3px solid rgba(255,213,111,.55);
    outline-offset: 2px;
}

/* v1.5.0 追加UI */
.mode-strip {
    display: grid;
    grid-template-columns: 220px 1fr auto;
    gap: 12px;
    align-items: center;
    margin-top: 16px;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: var(--card);
    box-shadow: var(--shadow);
}
.mode-strip select,
.sound-row input[type="range"] {
    width: 100%;
    border: 1px solid rgba(255,255,255,.25);
    border-radius: 12px;
    padding: 10px 12px;
    color: var(--text);
    background: rgba(0,0,0,.22);
}
.mode-description,
.daily-chip { margin: 0; color: var(--muted); line-height: 1.6; }
.daily-chip {
    padding: 10px 12px;
    border-radius: 999px;
    color: #211733;
    background: linear-gradient(135deg, #fff0a8, #ffbd5c);
    font-weight: 700;
}
.fever-panel {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 10px;
    align-items: center;
    margin: 0 0 12px;
    padding: 9px 12px;
    border: 1px solid rgba(255,255,255,.14);
    border-radius: 16px;
    background: rgba(0,0,0,.16);
    color: var(--muted);
}
.fever-panel[hidden] { display: none !important; }
.fever-bar {
    height: 10px;
    border-radius: 999px;
    overflow: hidden;
    background: rgba(255,255,255,.12);
}
.fever-bar i {
    display: block;
    width: 0%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #9ce7ff, #ffd56f, #ff7890);
    transition: width .16s ease;
}
.fever-panel.is-fever { border-color: rgba(255,213,111,.58); box-shadow: 0 0 28px rgba(255,213,111,.12); }
.toast-stack {
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 14px;
    z-index: 4;
    display: grid;
    gap: 8px;
    pointer-events: none;
}
.toast-message {
    justify-self: center;
    max-width: min(380px, 100%);
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(0,0,0,.66);
    border: 1px solid rgba(255,255,255,.22);
    color: #fff;
    font-weight: 700;
    box-shadow: 0 12px 30px rgba(0,0,0,.25);
    animation: toastIn .18s ease-out;
}
.toast-message.is-hide { opacity: 0; transform: translateY(8px); transition: .4s ease; }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.next-queue {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 8px;
    align-items: end;
}
.next-queue div {
    padding: 8px;
    border-radius: 16px;
    background: rgba(0,0,0,.16);
    border: 1px solid rgba(255,255,255,.12);
}
.next-queue canvas { width: 100%; height: auto; display: block; }
.next-queue small { display:block; color: var(--muted); font-size: .78rem; }
.hold-preview {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 10px;
    align-items: center;
    margin: 8px 0 12px;
}
.hold-preview canvas { width: 100%; height: auto; display: block; }
.hold-preview p { margin: 0; color: var(--accent); font-weight: 700; }
.item-buttons { display: grid; gap: 8px; }
.item-buttons button { justify-content: space-between; }
.item-buttons span {
    display: inline-flex;
    min-width: 1.8em;
    justify-content: center;
    margin-left: 8px;
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(0,0,0,.22);
}
.sound-row {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 12px;
    align-items: center;
    margin-top: 14px;
    color: var(--muted);
}
.collection-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}
.collection-item {
    display: grid;
    grid-template-columns: 26px 1fr;
    gap: 6px 8px;
    align-items: center;
    text-align: left;
    padding: 9px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,.13);
    background: rgba(0,0,0,.14);
    color: var(--text);
}
.collection-item.is-locked { opacity: .48; filter: grayscale(.8); }
.collection-dot { width: 24px; height: 24px; border-radius: 50%; grid-row: span 2; }
.collection-item strong { font-size: .88rem; }
.collection-item small { grid-column: 2; color: var(--muted); line-height: 1.4; font-size: .76rem; }
.achievement-list { display: grid; gap: 8px; }
.achievement-row {
    padding: 9px 10px;
    border-radius: 14px;
    background: rgba(0,0,0,.14);
    border: 1px solid rgba(255,255,255,.12);
    opacity: .55;
}
.achievement-row.is-open { opacity: 1; border-color: rgba(255,213,111,.35); }
.achievement-row strong { display:block; color: var(--accent); }
.achievement-row span { display:block; color: var(--muted); line-height: 1.45; font-size: .84rem; margin-top: 3px; }
.share-card-box { display: grid; gap: 10px; width: min(420px, 100%); }
.share-card-box[hidden] { display: none !important; }
.share-card-box canvas { width: 100%; height: auto; border-radius: 14px; border: 1px solid rgba(255,255,255,.18); }
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 3px solid rgba(255,213,111,.75);
    outline-offset: 3px;
}
@media (max-width: 980px) {
    .mode-strip { grid-template-columns: 1fr; }
    .daily-chip { border-radius: 16px; }
}
@media (max-width: 560px) {
    .next-queue { grid-template-columns: 1fr 1fr 1fr; }
    .collection-grid { grid-template-columns: 1fr; }
    .sound-row { grid-template-columns: 1fr; }
    .hold-preview { grid-template-columns: 90px 1fr; }
}