:root {
  --bg: #f4f6fa;
  --card: #ffffff;
  --fg: #1c2230;
  --muted: #6b7280;
  --line: #e5e8ef;
  --soft: #f3f5f9;
  --ink: #1f2937;
  --ink-fg: #ffffff;
  --ok: #16a34a;
  --ok-bg: #e8f7ed;
  --tight: #c27803;
  --tight-bg: #fff6e0;
  --no: #dc2626;
  --no-bg: #fdecec;
  --alt-bg: #eaf8ee;
  --accent: #2563eb;
  --w: #4a6fa5;
  --kv: #7fb069;
  --ov: #c9c9c9;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px rgba(16, 24, 40, .06);
}
:root[data-theme="dark"] {
  --bg: #0f1218;
  --card: #171b24;
  --fg: #e6e8ee;
  --muted: #9aa3b2;
  --line: #2a303c;
  --soft: #1f2430;
  --ink: #e6e8ee;
  --ink-fg: #0f1218;
  --ok: #4ade80;
  --ok-bg: #11291a;
  --tight: #fbbf24;
  --tight-bg: #2d2410;
  --no: #f87171;
  --no-bg: #2d1515;
  --alt-bg: #11291a;
  --accent: #60a5fa;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { background: var(--bg); }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.6 -apple-system, "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif; }
a { color: inherit; }
button, select, input { font: inherit; color: inherit; }

/* ヘッダー */
.top { max-width: 1240px; margin: 0 auto; padding: 22px 24px 6px; display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.brand h1 { margin: 0; font-size: 24px; letter-spacing: .2px; }
.brand p { margin: 2px 0 0; font-size: 13px; color: var(--muted); }
.nav { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.link { background: none; border: 0; padding: 6px 12px; border-radius: 8px; color: var(--fg); text-decoration: none; cursor: pointer; font-size: 15px; }
.link:hover { background: var(--soft); }
.icon { background: none; border: 0; padding: 6px; border-radius: 8px; cursor: pointer; display: inline-flex; color: var(--muted); }
.icon:hover { background: var(--soft); color: var(--fg); }

/* レイアウト */
.layout { max-width: 1240px; margin: 0 auto; padding: 12px 24px 40px; display: grid; grid-template-columns: 380px 1fr; gap: 20px; align-items: start; }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; padding: 12px 16px 32px; } .top { padding: 18px 16px 4px; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); min-width: 0; }
.right { display: grid; gap: 20px; }

/* 左パネル */
.panel { padding: 22px 26px 26px; display: flex; flex-direction: column; position: sticky; top: 16px; }
@media (max-width: 900px) { .panel { position: static; } }
.field { margin-bottom: 20px; }
.field label, .field .label { display: block; font-size: 15px; font-weight: 600; margin-bottom: 8px; }
select { width: 100%; padding: 10px 36px 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--card) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%236b7280' stroke-width='1.6'/%3E%3C/svg%3E") no-repeat right 12px center; appearance: none; -webkit-appearance: none; }
.seg { display: flex; gap: 8px; flex-wrap: wrap; }
.seg button { padding: 10px 2px; min-width: 0; flex: 1 1 0; border: 1px solid var(--line); border-radius: 10px; background: var(--soft); color: var(--fg); cursor: pointer; font-size: 14px; }
.seg button[aria-checked="true"] { background: var(--ink); color: var(--ink-fg); border-color: var(--ink); font-weight: 600; }
.cta { margin-top: auto; padding-top: 24px; text-align: center; }
.primary.big { width: 100%; display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 16px 18px; border: 0; border-radius: 12px; background: var(--ink); color: var(--ink-fg); font-size: 16px; font-weight: 600; cursor: pointer; }
.primary.big:disabled { opacity: .6; cursor: default; }
.primary.big .chev { font-size: 20px; line-height: 1; opacity: .8; }
.muted { color: var(--muted); }
.small { font-size: 12px; line-height: 1.6; }
.cta .small { margin: 12px 0 0; }

/* 判定結果 */
.result { padding: 22px 30px 24px; }
.eyebrow { margin: 0 0 8px; font-size: 13px; color: var(--muted); }
.verdict-row { display: flex; align-items: center; gap: 14px; }
.vicon { width: 48px; height: 48px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 26px; font-weight: 700; flex: none; }
.vicon.ok { background: var(--ok); } .vicon.tight { background: var(--tight); } .vicon.no { background: var(--no); } .vicon.none { background: var(--muted); }
.vword { font-size: 40px; font-weight: 800; line-height: 1; }
.vword.ok { color: var(--ok); } .vword.tight { color: var(--tight); } .vword.no { color: var(--no); } .vword.none { color: var(--muted); }
.vtext { margin: 14px 0 0; font-size: 17px; line-height: 1.7; }
.result hr { border: 0; border-top: 1px solid var(--line); margin: 18px 0; }
.stats { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 16px; align-items: center; }
@media (max-width: 700px) { .stats { grid-template-columns: 1fr 1fr; } }
.stat { border-left: 1px solid var(--line); padding-left: 16px; }
.stat:first-child { border-left: 0; padding-left: 0; }
.stat .k { display: block; font-size: 13px; color: var(--muted); }
.stat .v { display: block; font-size: 22px; font-weight: 700; margin-top: 2px; }
.ghost { padding: 12px 16px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); cursor: pointer; font-weight: 600; white-space: nowrap; }
.ghost:hover { background: var(--soft); }
.ghost .chev-v { display: inline-block; transition: transform .15s; }
.ghost[aria-expanded="true"] .chev-v { transform: rotate(180deg); }
.detail { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.summary { margin: 0 0 10px; font-size: 14px; }
.bar { position: relative; height: 16px; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; background: var(--soft); }
.bar .seg { position: absolute; top: 0; bottom: 0; display: block; }
.bar .seg.w { background: var(--w); } .bar .seg.kv { background: var(--kv); } .bar .seg.ov { background: var(--ov); }
.bar .cap { position: absolute; top: -2px; bottom: -2px; width: 2px; background: var(--no); }
.legend { font-size: 12px; color: var(--muted); margin: 6px 0 14px; display: flex; gap: 12px; flex-wrap: wrap; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 4px; vertical-align: -1px; }
.qt { width: 100%; border-collapse: collapse; font-size: 13px; }
.qt th, .qt td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.qt th { color: var(--muted); font-weight: 500; }
.qt tr.sel td { background: var(--soft); }
.qt .st { font-weight: 600; }
.qt .st.ok { color: var(--ok); } .qt .st.tight { color: var(--tight); } .qt .st.no { color: var(--no); }
.advice { font-size: 14px; margin: 12px 0 6px; }
.detail .small { margin: 4px 0 0; }

/* 所見 */
.judge { padding: 22px 30px 26px; }
.judge-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.judge-head h2 { margin: 0; font-size: 18px; display: inline-flex; align-items: center; gap: 8px; }
.judge-head .eyebrow { margin-bottom: 2px; }
.hero { margin-bottom: 18px; }
.hero .k { display: block; font-size: 13px; color: var(--muted); }
.hero-speed { font-size: 40px; font-weight: 800; line-height: 1.2; margin-top: 2px; min-height: 48px; display: flex; align-items: center; gap: 12px; }
.hero-speed .idle { color: var(--muted); }
.hero-speed .loading { font-size: 18px; font-weight: 500; color: var(--muted); display: inline-flex; align-items: center; gap: 8px; }
.hero-speed .loading .spin { width: 20px; height: 20px; border: 2.5px solid var(--line); border-top-color: var(--fg); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.hero-speed .no { color: var(--no); }
.hero-speed .unknown { color: var(--muted); font-size: 28px; }
.hero .vtext { font-size: 17px; }
.hero .small { margin: 8px 0 0; }
.result .vword { font-size: 28px; }
.result .vicon { width: 36px; height: 36px; font-size: 20px; }
.result .vtext { font-size: 15px; margin-top: 10px; }
.judge-head .spark { color: var(--accent); }
.judge-head select { width: auto; max-width: 320px; }
.judge-body { display: grid; grid-template-columns: 40px 1fr; gap: 14px; }
.avatar { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line); display: flex; align-items: center; justify-content: center; background: var(--card); color: var(--fg); }
.bubble { background: var(--soft); border-radius: 12px; padding: 16px 18px; min-width: 0; }
.j-main { white-space: pre-wrap; word-break: break-word; font-size: 15px; line-height: 1.8; }
.j-main:empty { display: none; }
.box { border-radius: 10px; padding: 12px 16px 10px; margin-top: 14px; }
.box.risk { background: var(--no-bg); }
.box.alt { background: var(--alt-bg); }
.box h3 { margin: 0 0 6px; font-size: 14px; display: inline-flex; align-items: center; gap: 8px; }
.box.risk h3 { color: var(--no); } .box.alt h3 { color: var(--ok); }
.box .bi { width: 18px; height: 18px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; color: #fff; }
.box.risk .bi { background: var(--no); } .box.alt .bi { background: var(--ok); }
.box ul { margin: 0; padding-left: 20px; font-size: 14px; line-height: 1.7; }
.box li { margin: 2px 0; word-break: break-word; }
.j-status { margin-top: 12px; text-align: right; font-size: 12px; color: var(--muted); }
.j-status.err { color: var(--no); text-align: left; white-space: pre-wrap; }
.dots i { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--muted); margin-right: 3px; opacity: .35; animation: blink 1.2s infinite; }
.dots i:nth-child(2) { animation-delay: .2s; } .dots i:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 100% { opacity: .35; } 50% { opacity: 1; } }

/* 使い方 */
.help { border: 1px solid var(--line); border-radius: 14px; padding: 22px 26px; max-width: 640px; width: calc(100% - 32px); background: var(--card); color: var(--fg); box-shadow: var(--shadow); }
.help::backdrop { background: rgba(10, 14, 20, .45); }
.help-head { display: flex; align-items: center; justify-content: space-between; }
.help h2 { margin: 0; font-size: 18px; }
.help h3 { font-size: 14px; margin: 18px 0 6px; }
.help ol, .help ul { padding-left: 20px; font-size: 14px; }
.help input { width: 100%; padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 8px; }
.row button { padding: 8px 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); cursor: pointer; }