:root {
  color-scheme: dark;
  --bg: #07100f;
  --bg-soft: #0c1917;
  --panel: rgba(13, 27, 24, .94);
  --panel-strong: #12231f;
  --ink: #edf1e8;
  --muted: #9caea7;
  --line: rgba(177, 205, 188, .16);
  --line-strong: rgba(177, 205, 188, .3);
  --green: #7db79b;
  --green-bright: #b0d6be;
  --amber: #d0ac70;
  --danger: #d4827b;
  --serif: "Noto Serif SC", "Songti SC", serif;
  --sans: "Noto Sans SC", system-ui, sans-serif;
  --shell: min(1240px, calc(100vw - 40px));
}

html[data-reading-size="large"] {
  --shell: min(1107px, calc(89.285714vw - 36px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 300px; background: radial-gradient(circle at 80% 0, rgba(75, 130, 107, .16), transparent 36rem), radial-gradient(circle at 5% 40%, rgba(187, 145, 79, .08), transparent 30rem), var(--bg); color: var(--ink); font-family: var(--sans); }
body::before { position: fixed; inset: 0; z-index: -1; background-image: linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(to bottom, rgba(0,0,0,.75), transparent 92%); content: ""; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
[hidden] { display: none !important; }
.sr-only, .skip-link { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link:focus { position: fixed; z-index: 100; top: 8px; left: 8px; width: auto; height: auto; padding: 10px 14px; clip: auto; background: var(--ink); color: #07100f; }

.coc-topbar { position: sticky; z-index: 20; top: 0; display: flex; align-items: center; justify-content: space-between; min-height: 70px; padding: 0 max(20px, calc((100vw - 1240px) / 2)); border-bottom: 1px solid var(--line); background: rgba(7, 16, 15, .9); backdrop-filter: blur(20px); }
.coc-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.coc-brand-mark { display: grid; width: 36px; height: 36px; place-items: center; border: 1px solid var(--line-strong); border-radius: 50%; color: var(--green-bright); box-shadow: inset 0 0 0 5px rgba(125,183,155,.05); }
.coc-brand strong, .coc-brand small { display: block; }
.coc-brand strong { font: 700 13px/1.3 var(--serif); letter-spacing: .08em; }
.coc-brand small { margin-top: 3px; color: var(--muted); font-size: 12px; letter-spacing: .16em; }
.coc-topbar nav { display: flex; gap: 6px; }
.coc-topbar nav button, .coc-topbar nav a { min-height: 34px; padding: 0 13px; border: 1px solid transparent; background: transparent; color: var(--muted); font-size: 12px; text-decoration: none; cursor: pointer; }
.coc-topbar nav button:hover, .coc-topbar nav a:hover { border-color: var(--line); color: var(--ink); }

main { width: var(--shell); margin: 0 auto; }
.coc-hero { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 60px; align-items: center; min-height: 520px; padding: 80px 5vw 68px; border-bottom: 1px solid var(--line); }
.coc-hero-copy > p:first-child, .panel-heading > div > p { margin: 0 0 14px; color: var(--green); font-size: 12px; font-weight: 600; letter-spacing: .22em; }
.coc-hero h1 { margin: 0; font: 800 clamp(42px, 7vw, 78px)/1.1 var(--serif); letter-spacing: -.045em; }
.coc-hero h1 em { color: var(--green-bright); font-style: normal; font-weight: 500; }
.coc-hero-lead { max-width: 670px; margin: 26px 0 0; color: var(--muted); font: 400 13px/2 var(--serif); }
.tool-identity-note { max-width: 720px; margin: 18px 0 0; padding: 12px 15px; border-left: 2px solid var(--amber); background: rgba(208,172,112,.06); color: var(--muted); font-size: 12px; line-height: 1.75; }
.tool-identity-note strong { color: var(--amber); }
.coc-hero-actions, .builder-buttons, .sheet-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 30px; }
.coc-hero-actions button, .builder-buttons button, .sheet-actions button, .import-zone button { min-height: 44px; padding: 0 18px; border: 1px solid var(--line-strong); background: transparent; color: var(--ink); font-size: 12px; cursor: pointer; }
button.primary { border-color: var(--green); background: var(--green); color: #07110e; font-weight: 700; }
button:hover { filter: brightness(1.08); }
.coc-hero-seal { position: relative; display: grid; width: 280px; height: 280px; place-items: center; border: 1px solid var(--line-strong); border-radius: 50%; background: radial-gradient(circle, rgba(125,183,155,.17), rgba(8,19,17,.2) 52%, transparent 53%); box-shadow: 0 0 80px rgba(71, 128, 105, .14); }
.coc-hero-seal::before, .coc-hero-seal::after { position: absolute; border: 1px solid var(--line); border-radius: 50%; content: ""; }
.coc-hero-seal::before { inset: 22px; }
.coc-hero-seal::after { inset: 49px; border-style: dashed; }
.coc-hero-seal span { position: relative; z-index: 1; color: var(--green-bright); font: 400 108px/1 var(--serif); }
.coc-hero-seal i { position: absolute; width: 1px; height: 250px; background: var(--line); transform: rotate(45deg); }
.coc-hero-seal b, .coc-hero-seal small { position: absolute; z-index: 2; padding: 3px 8px; background: var(--bg); color: var(--amber); font-size: 12px; letter-spacing: .14em; }
.coc-hero-seal b { top: 42px; }
.coc-hero-seal small { bottom: 40px; color: var(--muted); }

.coc-tabbar { display: grid; grid-template-columns: repeat(2, 1fr); margin: 34px 0 0; border: 1px solid var(--line); background: rgba(8,18,16,.7); }
.coc-tabbar button { min-height: 62px; border: 0; border-right: 1px solid var(--line); background: transparent; color: var(--muted); text-align: left; cursor: pointer; }
.coc-tabbar button:last-child { border-right: 0; }
.coc-tabbar button span { margin: 0 14px 0 18px; color: var(--green); font-size: 12px; letter-spacing: .1em; }
.coc-tabbar button[aria-selected="true"] { background: rgba(125,183,155,.1); color: var(--ink); box-shadow: inset 0 -2px var(--green); }
.coc-panel { padding: 52px 0 80px; }
.panel-heading { display: flex; align-items: end; justify-content: space-between; gap: 34px; margin-bottom: 26px; }
.panel-heading h2 { margin: 0; font: 700 clamp(26px, 4vw, 40px)/1.25 var(--serif); }
.panel-heading > p { max-width: 520px; margin: 0; color: var(--muted); font: 400 12px/1.8 var(--serif); }
.coc-card { border: 1px solid var(--line); background: linear-gradient(145deg, rgba(18,35,31,.92), rgba(10,23,20,.88)); box-shadow: 0 22px 70px rgba(0,0,0,.13); }
.coc-card > header { padding: 20px 22px; border-bottom: 1px solid var(--line); }
.coc-card > header span { display: block; color: var(--green); font-size: 12px; letter-spacing: .15em; }
.coc-card > header h3 { margin: 6px 0 0; font: 650 18px/1.4 var(--serif); }
.builder-layout { display: grid; grid-template-columns: minmax(320px, .72fr) minmax(0, 1.28fr); gap: 18px; align-items: start; }
.builder-controls form { display: grid; gap: 17px; padding: 22px; }
.builder-controls label, .check-form label { display: grid; gap: 7px; }
.builder-controls label > span { color: var(--green-bright); font-size: 12px; }
.form-grid { display: grid; gap: 12px; }
.form-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
input, select, textarea { width: 100%; min-height: 42px; padding: 9px 11px; border: 1px solid var(--line-strong); border-radius: 0; outline: 0; background: rgba(4,13,11,.82); color: var(--ink); font-size: 12px; resize: vertical; }
textarea { min-height: 78px; }
input:focus, select:focus, textarea:focus { border-color: var(--green); box-shadow: 0 0 0 2px rgba(125,183,155,.08); }
.occupation-presets { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 7px; }
.occupation-presets button { display: grid; min-height: 58px; padding: 10px 12px; border: 1px solid var(--line); background: rgba(255,255,255,.018); color: var(--muted); text-align: left; cursor: pointer; }
.occupation-presets button strong { color: var(--ink); font: 600 12px/1.4 var(--serif); }
.occupation-presets button small { margin-top: 3px; font-size: 12px; line-height: 1.5; }
.occupation-presets button.selected { border-color: var(--green); background: rgba(125,183,155,.1); }
.custom-occupation-panel { display: grid; gap: 14px; min-width: 0; margin: 0; padding: 17px; border: 1px solid rgba(208,172,112,.34); background: rgba(208,172,112,.045); }
.custom-occupation-panel legend { padding: 0 8px; color: var(--amber); font: 600 13px/1.4 var(--serif); }
.custom-occupation-note { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.75; }
.custom-occupation-panel select[multiple] { min-height: 230px; padding: 6px; resize: vertical; }
.custom-occupation-panel select[multiple] option { padding: 7px 9px; }
.custom-skill-count { margin: -7px 0 0; color: var(--green-bright); font-size: 12px; }
.custom-skill-count.invalid { color: var(--danger); }
.custom-occupation-agreement { display: flex !important; grid-template-columns: none; align-items: flex-start; gap: 10px !important; color: var(--muted); font-size: 12px; line-height: 1.65; }
.custom-occupation-agreement input { flex: 0 0 auto; width: 18px; min-height: 18px; margin: 2px 0 0; accent-color: var(--green); }
.custom-occupation-agreement span { color: inherit !important; font-size: inherit !important; }
.builder-buttons { margin-top: 2px; }
.import-zone { display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: center; padding: 18px 22px; border-top: 1px solid var(--line); background: rgba(0,0,0,.12); }
.import-zone strong { font: 600 12px/1.5 var(--serif); }
.import-zone p { margin: 4px 0 0; color: var(--muted); font-size: 12px; line-height: 1.65; }
.preview-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.preview-heading small { color: var(--muted); font-size: 12px; }
.empty-preview { display: grid; min-height: 520px; padding: 50px; place-items: center; align-content: center; text-align: center; }
.empty-preview span { color: var(--green); font: 400 54px/1 var(--serif); }
.empty-preview strong { margin-top: 18px; font: 650 18px/1.5 var(--serif); }
.empty-preview p { max-width: 430px; margin: 10px 0 0; color: var(--muted); font-size: 12px; line-height: 1.8; }
.sheet-identity { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; padding: 1px; background: var(--line); }
.sheet-identity > div { padding: 16px 19px; background: var(--panel-strong); }
.sheet-identity span, .sheet-identity small { display: block; color: var(--muted); font-size: 12px; letter-spacing: .08em; }
.sheet-identity strong { display: block; margin: 5px 0 3px; font: 650 15px/1.45 var(--serif); }
.characteristic-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; padding: 1px; background: var(--line); }
.characteristic-cell { display: grid; min-height: 86px; padding: 12px; place-items: center; align-content: center; background: rgba(7,19,16,.96); text-align: center; }
.characteristic-cell span { color: var(--muted); font-size: 12px; letter-spacing: .1em; }
.characteristic-cell strong { margin-top: 4px; color: var(--green-bright); font: 600 26px/1 var(--serif); }
.characteristic-cell small { margin-top: 5px; color: var(--muted); font-size: 12px; }
.derived-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; padding: 16px; border-bottom: 1px solid var(--line); }
.derived-cell { padding: 11px 8px; border: 1px solid var(--line); background: rgba(125,183,155,.045); text-align: center; }
.derived-cell span, .derived-cell small { display: block; color: var(--muted); font-size: 12px; }
.derived-cell strong { display: block; margin: 5px 0 2px; font: 650 17px/1 var(--serif); }
.sheet-section { padding: 18px 20px; border-bottom: 1px solid var(--line); }
.sheet-section > header { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.sheet-section h4 { margin: 0; font: 600 13px/1.5 var(--serif); }
.sheet-section header span { color: var(--muted); font-size: 12px; }
.skill-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.skill-pill { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 35px; padding: 7px 9px; border: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.skill-pill strong { color: var(--ink); font-size: 12px; }
.weapon-grid { display: grid; gap: 6px; }
.weapon-row { display: grid; grid-template-columns: minmax(100px,1.4fr) repeat(3,minmax(60px,.7fr)); gap: 8px; align-items: center; padding: 10px 11px; border: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.weapon-row strong { color: var(--ink); font: 600 12px/1.4 var(--serif); }
.sheet-backstory { padding: 16px 20px; color: var(--muted); font: 400 12px/1.75 var(--serif); }
.sheet-backstory:empty { display: none; }
.sheet-actions { margin: 0; padding: 19px 20px 22px; }

.rules-heading { align-items: center; }
.rule-search { position: relative; width: min(390px, 100%); }
.rule-search input { padding-right: 48px; }
.rule-search kbd { position: absolute; top: 50%; right: 13px; padding: 2px 6px; border: 1px solid var(--line); color: var(--muted); font: 400 12px/1.4 var(--sans); transform: translateY(-50%); }
.rules-layout { display: grid; grid-template-columns: 250px minmax(0,1fr); gap: 16px; align-items: start; }
.rule-category-nav { display: grid; padding: 8px; }
.rule-category-nav button { min-height: 42px; padding: 0 12px; border: 0; border-bottom: 1px solid var(--line); background: transparent; color: var(--muted); font-size: 12px; text-align: left; cursor: pointer; }
.rule-category-nav button.selected { background: rgba(125,183,155,.09); color: var(--green-bright); }
.rule-note { margin: 0; padding: 16px 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; line-height: 1.75; }
.quick-rule-list { display: grid; gap: 0; }
.quick-rule { display: grid; grid-template-columns: 92px minmax(0,1fr); gap: 16px; padding: 18px 22px; border-bottom: 1px solid var(--line); }
.quick-rule:last-child { border-bottom: 0; }
.quick-rule > span { color: var(--green); font-size: 12px; letter-spacing: .08em; }
.quick-rule h4 { margin: 0; font: 600 14px/1.5 var(--serif); }
.quick-rule p { margin: 7px 0 0; color: var(--muted); font-size: 12px; line-height: 1.8; white-space: pre-line; }
.quick-rule footer { margin-top: 8px; color: var(--amber); font-size: 12px; }
.quick-rule footer button { padding: 0; border: 0; background: transparent; color: var(--amber); font-size: 12px; cursor: pointer; }
.rule-empty { margin: 0; padding: 42px; color: var(--muted); text-align: center; }
.rulebook-card { margin-top: 18px; }
.rulebook-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.rulebook-toolbar > div:last-child { display: flex; flex-wrap: wrap; gap: 7px; }
.rulebook-toolbar a, .rulebook-toolbar button { min-height: 36px; padding: 9px 12px; border: 1px solid var(--line-strong); background: transparent; color: var(--ink); font-size: 12px; text-decoration: none; cursor: pointer; }
.rulebook-toolbar button:disabled { color: var(--muted); cursor: not-allowed; opacity: .55; }
.rule-credit { margin: 0; padding: 14px 22px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 12px; line-height: 1.75; }
.rule-credit strong { color: var(--green-bright); }
.rule-credit a { color: var(--amber); }
.rulebook-empty { display: grid; min-height: 520px; padding: 46px; place-items: center; align-content: center; background: radial-gradient(circle, rgba(125,183,155,.09), transparent 20rem), #111a18; text-align: center; }
.rulebook-empty span { display: grid; width: 74px; height: 88px; place-items: center; border: 1px solid var(--line-strong); color: var(--green); font: 600 15px/1 var(--serif); }
.rulebook-empty strong { margin-top: 22px; font: 650 18px/1.5 var(--serif); }
.rulebook-empty p { max-width: 520px; margin: 9px 0 0; color: var(--muted); font-size: 12px; line-height: 1.8; }
#rulebook-frame { display: block; width: 100%; height: min(78vh, 920px); min-height: 620px; border: 0; background: #202422; }

.coc-footer { display: flex; align-items: center; justify-content: space-between; width: var(--shell); min-height: 90px; margin: 0 auto; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.coc-footer a { text-decoration: none; }
.coc-toast { position: fixed; z-index: 50; right: 22px; bottom: 22px; max-width: min(380px, calc(100vw - 44px)); padding: 13px 16px; border: 1px solid var(--green); background: #12221e; color: var(--ink); font-size: 12px; line-height: 1.6; opacity: 0; transform: translateY(12px); pointer-events: none; transition: .2s ease; }
.coc-toast.show { opacity: 1; transform: translateY(0); }

@media (max-width: 920px) {
  .coc-hero { grid-template-columns: 1fr; min-height: auto; padding: 70px 0; }
  .coc-hero-seal { display: none; }
  .builder-layout, .rules-layout { grid-template-columns: 1fr; }
  .builder-controls { order: 0; }
  .character-preview { order: 1; }
  .derived-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 640px) {
  :root { --shell: min(100% - 24px, 1240px); }
  .coc-topbar { min-height: 62px; padding: 0 12px; }
  .coc-topbar nav a { display: none; }
  .coc-topbar nav button { padding: 0 7px; font-size: 12px; }
  .coc-brand small { display: none; }
  .coc-hero { padding: 52px 0; }
  .coc-hero h1 { font-size: 39px; }
  .coc-tabbar button { min-height: 54px; font-size: 12px; }
  .panel-heading { display: grid; }
  .form-grid.two, .sheet-identity { grid-template-columns: 1fr; }
  .occupation-presets { grid-template-columns: 1fr; }
  .characteristic-grid { grid-template-columns: repeat(2, 1fr); }
  .derived-grid { grid-template-columns: repeat(2, 1fr); }
  .skill-grid { grid-template-columns: repeat(2, 1fr); }
  .weapon-row { grid-template-columns: 1fr 1fr; }
  .import-zone { grid-template-columns: 1fr; }
  .quick-rule { grid-template-columns: 1fr; gap: 5px; }
  .rulebook-toolbar { align-items: flex-start; flex-direction: column; }
  #rulebook-frame { min-height: 520px; }
}

/* 桌边可读性：正文与交互文字不低于常用浏览器的小字号阈值。 */
.coc-brand small, .coc-hero-copy > p:first-child, .panel-heading > div > p,
.coc-card > header span, .coc-hero-seal b, .coc-hero-seal small,
.sheet-identity span, .sheet-identity small, .characteristic-cell span,
.characteristic-cell small, .derived-cell span, .derived-cell small,
.sheet-section header span, .quick-rule > span, .quick-rule footer,
.quick-rule footer button { font-size: 12px; }
.coc-topbar nav button, .coc-topbar nav a, .coc-tabbar button,
.builder-controls label > span, .occupation-presets button small,
.import-zone p, .preview-heading small, .rule-category-nav button,
.rule-note, .rulebook-toolbar a, .rulebook-toolbar button,
.coc-footer { font-size: 12px; }
input, select, textarea, .coc-hero-actions button, .builder-buttons button,
.sheet-actions button, .import-zone button, .skill-pill, .weapon-row,
.quick-rule p, .rulebook-empty p, .coc-toast { font-size: 13px; }
.skill-pill strong { font-size: 14px; }