:root{--fg: #101828;--bg: #f4f6fa;--card: #ffffff;--muted: #5b6472;--line: #e4e8ee;--accent: #2563eb;--accent-2: #7c3aed;--accent-bg: #eef3fd;--biz: #dcf7e6;--biz-fg: #0f7a3d;--wake: #fdf3d8;--wake-fg: #92600a;--sleep: #edeff3;--sleep-fg: #8a93a3;--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px -12px rgba(16, 24, 40, .18)}@media (prefers-color-scheme: dark){:root{--fg: #e8eaee;--bg: #0b101c;--card: #141b2c;--muted: #98a2b3;--line: #263042;--accent: #7aa8f7;--accent-2: #a78bfa;--accent-bg: #1b2740;--biz: #123526;--biz-fg: #5fd696;--wake: #3a2e10;--wake-fg: #e8b64c;--sleep: #171d2b;--sleep-fg: #5b6472;--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px -12px rgba(0, 0, 0, .6)}}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Sans,Noto Sans JP,sans-serif;color:var(--fg);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}header.site{position:sticky;top:0;z-index:10;backdrop-filter:blur(10px);background:color-mix(in srgb,var(--bg) 82%,transparent);border-bottom:1px solid var(--line);padding:.75rem 1.25rem;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.4rem 1rem}nav.lang-nav{display:flex;flex-wrap:wrap;gap:.15rem .7rem;font-size:.78rem}nav.lang-nav a{color:var(--muted);text-decoration:none}nav.lang-nav a:hover{color:var(--accent);text-decoration:underline}nav.lang-nav a[aria-current=true]{color:var(--fg);font-weight:700}header.site>a{color:var(--fg);text-decoration:none;font-weight:800;letter-spacing:.01em;background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}main{max-width:860px;margin:0 auto;padding:1.5rem 1.25rem 4rem}h1{font-size:clamp(1.5rem,4vw,2.1rem);line-height:1.3;margin:.5rem 0 .75rem;letter-spacing:-.01em}h2{font-size:1.1rem;margin:2.2rem 0 .8rem;display:flex;align-items:center;gap:.5rem}h2:before{content:"";width:4px;height:1.1em;border-radius:2px;background:linear-gradient(var(--accent),var(--accent-2))}a{color:var(--accent)}.muted{color:var(--muted);font-size:.85rem}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:1.1rem 1.25rem}table{border-collapse:separate;border-spacing:0;width:100%;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}th,td{padding:.45rem .7rem;text-align:center;border-bottom:1px solid var(--line)}tr:last-child td{border-bottom:none}th{background:var(--accent-bg);font-weight:700}.table-wrap{overflow-x:auto}.chip{display:inline-block;padding:.25rem .8rem;border-radius:999px;background:var(--biz);color:var(--biz-fg);font-weight:700;font-size:.95rem;margin:.15rem .25rem .15rem 0;white-space:nowrap}.chip.wake{background:var(--wake);color:var(--wake-fg)}.cell-biz{background:var(--biz);color:var(--biz-fg);font-weight:600}.cell-wake{background:var(--wake);color:var(--wake-fg)}.cell-sleep{background:var(--sleep);color:var(--sleep-fg)}.legend{display:flex;flex-wrap:wrap;gap:.9rem;margin:.6rem 0 0;font-size:.8rem;color:var(--muted)}.legend span:before{content:"";display:inline-block;width:.8em;height:.8em;border-radius:3px;margin-right:.35em;vertical-align:-.05em}.legend .l-biz:before{background:var(--biz);border:1px solid var(--biz-fg)}.legend .l-wake:before{background:var(--wake);border:1px solid var(--wake-fg)}.legend .l-sleep:before{background:var(--sleep);border:1px solid var(--sleep-fg)}.clock-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem}.clock-card{border-radius:18px;padding:1.2rem 1.3rem;color:#fff;box-shadow:var(--shadow);background:linear-gradient(140deg,#334155,#0f172a);position:relative;overflow:hidden}.clock-card[data-sky=day]{background:linear-gradient(140deg,#38a6f5,#1e5fd0)}.clock-card[data-sky=evening]{background:linear-gradient(140deg,#f59e0b,#b53389)}.clock-card[data-sky=night]{background:linear-gradient(140deg,#33415c,#0b1020)}.clock-card .icon{position:absolute;top:.9rem;right:1.1rem;font-size:1.4rem;opacity:.9}.clock-card .city{font-weight:800;font-size:1.05rem}.clock-card .country{opacity:.75;font-size:.8rem}.clock-card .time{font-size:clamp(1.9rem,6vw,2.5rem);font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:.01em;line-height:1.2}.clock-card .date{opacity:.85;font-size:.85rem}.clock-card .utc{opacity:.7;font-size:.75rem}.summary-card{margin:1rem 0 0;border-left:4px solid var(--accent);font-size:1.05rem}button,select,input[type=time]{font:inherit;color:var(--fg);background:var(--card);border:1px solid var(--line);border-radius:10px;padding:.45rem .7rem}button.primary{background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#fff;border:none;font-weight:700;cursor:pointer;padding:.45rem 1.2rem}#lang-banner{display:none;justify-content:center;gap:1rem;align-items:center;background:var(--accent-bg);padding:.5rem 1rem;font-size:.9rem}#lang-banner.show{display:flex}#lang-banner button{background:none;border:none;color:var(--muted);cursor:pointer}footer.site{border-top:1px solid var(--line);padding:1.2rem;text-align:center;margin-top:2rem}.pair-links{display:flex;flex-wrap:wrap;gap:.45rem}.pair-links a{text-decoration:none;font-size:.85rem;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:.25rem .75rem}.pair-links a:hover{border-color:var(--accent)}