:root {
  --ui-ink: #171c1f;
  --ui-ink-soft: #34403d;
  --ui-muted: #68736f;
  --ui-canvas: #f2f4f2;
  --ui-surface: #ffffff;
  --ui-soft: #f7f9f7;
  --ui-line: #d9dfdb;
  --ui-line-strong: #bcc8c1;
  --ui-primary: #087b63;
  --ui-primary-dark: #05614e;
  --ui-primary-soft: #dff2ec;
  --ui-accent: #c56b13;
  --ui-accent-soft: #fff0dc;
  --ui-blue: #3169a6;
  --ui-danger: #b6372d;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { background: var(--ui-canvas); scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ui-ink);
  background: var(--ui-canvas);
  font-family: Inter, "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  letter-spacing: 0;
}
body::selection { color: var(--ui-ink); background: #bfe7db; }
button, input, textarea, select { font: inherit; letter-spacing: 0; }
a { color: inherit; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  color: #f7faf8;
  background: #171c1f;
  border-bottom: 1px solid #2c3435;
}
.topbar-inner {
  width: min(100%, 1680px);
  min-height: 68px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand {
  min-width: max-content;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: #fff;
  text-decoration: none;
}
.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: #082c25;
  background: #58d3b1;
  border: 1px solid #7be1c5;
  border-radius: 6px;
  font-size: 17px;
  font-weight: 900;
}
.brand-copy { display: grid; gap: 1px; }
.brand-copy strong { font-size: 16px; line-height: 1.2; }
.brand-copy span { color: #9ba9a5; font-size: 11px; font-weight: 650; }
.topnav {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}
.nav-link {
  min-height: 40px;
  padding: 0 13px;
  display: inline-flex;
  align-items: center;
  color: #b9c3c0;
  border-radius: 5px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}
.nav-link:hover { color: #fff; background: #242b2d; }
.nav-link.active { color: #062d25; background: #58d3b1; }
.local-status {
  min-width: max-content;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #b9c3c0;
  font-size: 12px;
  font-weight: 650;
}
.local-status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #58d3b1;
  box-shadow: 0 0 0 3px rgba(88, 211, 177, .13);
}

body > main {
  width: min(100%, 1680px);
  margin: 0 auto;
  padding: 30px 24px 72px;
}
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { color: var(--ui-ink); font-size: 32px; line-height: 1.18; }
h2 { color: var(--ui-ink); }
.page-intro { margin: 7px 0 0; color: var(--ui-muted); font-size: 14px; line-height: 1.6; }

button {
  min-height: 42px;
  padding: 9px 15px;
  color: #fff;
  background: var(--ui-primary);
  border: 1px solid var(--ui-primary);
  border-radius: 6px;
  font-weight: 780;
  cursor: pointer;
  transition: background .16s ease, border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}
button:hover { background: var(--ui-primary-dark); border-color: var(--ui-primary-dark); box-shadow: 0 4px 12px rgba(5, 97, 78, .14); }
button:active { transform: translateY(1px); }
button:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
button.secondary { color: var(--ui-ink-soft); background: #fff; border-color: var(--ui-line-strong); }
button.secondary:hover { color: var(--ui-ink); background: var(--ui-soft); border-color: #8fa098; box-shadow: none; }
button.danger { color: var(--ui-danger); background: #fff; border-color: #e2aaa5; }
button.danger:hover { background: #fff2f0; border-color: #cc746d; box-shadow: none; }
button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, a:focus-visible {
  outline: 3px solid rgba(8, 123, 99, .18);
  outline-offset: 2px;
}
input, textarea, select {
  width: 100%;
  color: var(--ui-ink);
  background: #fff;
  border: 1px solid var(--ui-line-strong);
  border-radius: 6px;
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
input, select { min-height: 44px; padding: 9px 12px; }
textarea { padding: 11px 12px; resize: vertical; line-height: 1.62; }
input:hover, textarea:hover, select:hover { border-color: #8fa098; }
input:focus, textarea:focus, select:focus {
  outline: 0;
  background: #fff;
  border-color: var(--ui-primary);
  box-shadow: 0 0 0 3px rgba(8, 123, 99, .1);
}
label { color: #303b38; font-size: 13px; font-weight: 760; }
.muted { color: var(--ui-muted); }
.status { color: #53605b; }
.actions { gap: 9px; }

/* Research desk */
.page-research .page-heading {
  margin: 0 0 22px;
  padding: 2px 0 18px;
  align-items: flex-end;
  border-bottom: 1px solid var(--ui-line);
}
.page-research .eyebrow {
  margin-bottom: 7px;
  color: var(--ui-primary);
  font-size: 11px;
  font-weight: 850;
}
.page-research .workflow {
  overflow: visible;
  background: transparent;
  border: 0;
  border-radius: 0;
  gap: 8px;
}
.page-research .workflow-step {
  min-height: 36px;
  padding: 0 12px;
  color: #75807c;
  background: transparent;
  border: 0;
  border-bottom: 2px solid #cfd6d2;
}
.page-research .workflow-step span {
  width: 19px;
  height: 19px;
  border-color: #b9c4be;
  background: #fff;
}
.page-research .workflow-step.active {
  color: var(--ui-primary-dark);
  background: transparent;
  border-bottom-color: var(--ui-primary);
}
.page-research .workflow-step.active span { color: #fff; background: var(--ui-primary); border-color: var(--ui-primary); }
.page-research .hot-section,
.page-research .results-section,
.page-research .memory-section {
  padding: 22px 0 26px;
  background: transparent;
  border: 0;
  border-radius: 0;
}
.page-research .hot-section { padding-top: 0; }
.page-research .results-section,
.page-research .memory-section { margin-top: 28px; border-top: 1px solid var(--ui-line); }
.page-research .section-heading { align-items: center; gap: 10px; }
.page-research .section-index {
  width: 34px;
  height: 24px;
  flex-basis: 34px;
  color: var(--ui-primary-dark);
  background: var(--ui-primary-soft);
  border-radius: 4px;
  font-size: 10px;
}
.page-research .section-heading h2 { font-size: 19px; }
.page-research .hot-toolbar { gap: 9px; }
.page-research .segment { border-color: var(--ui-line-strong); border-radius: 6px; }
.page-research .segment button { min-height: 40px; color: #48544f; border-color: var(--ui-line); }
.page-research .segment button:hover { color: var(--ui-ink); background: var(--ui-soft); box-shadow: none; }
.page-research .segment button.active { color: #fff; background: #252d2e; }
.page-research #scanHotTopicsBtn { color: #14201d; background: var(--ui-accent-soft); border-color: #e4b57d; }
.page-research #scanHotTopicsBtn:hover { background: #ffe5c3; border-color: var(--ui-accent); box-shadow: 0 4px 12px rgba(197, 107, 19, .12); }
.page-research .hot-grid { grid-template-columns: repeat(4, minmax(240px, 1fr)); gap: 10px; }
.page-research .hot-topic {
  padding: 15px;
  background: var(--ui-surface);
  border: 1px solid var(--ui-line);
  border-top: 3px solid #d7a15f;
  border-radius: 6px;
  box-shadow: 0 1px 2px rgba(23, 28, 31, .03);
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.page-research .hot-topic:hover { transform: translateY(-2px); border-color: #aebbb4; box-shadow: 0 8px 22px rgba(23, 28, 31, .08); }
.page-research .hot-topic h3 { margin-top: 12px; color: #222928; font-size: 15px; }
.page-research .hot-topic .summary { color: #4f5c57; }
.page-research .hot-topic .actions button { background: #fff; color: var(--ui-primary-dark); border-color: #99c8b9; }
.page-research .hot-topic .actions button:hover { color: #fff; background: var(--ui-primary); }
.page-research .workspace {
  grid-template-columns: minmax(390px, 430px) minmax(0, 1fr);
  margin-top: 8px;
  overflow: hidden;
  background: var(--ui-surface);
  border: 1px solid var(--ui-line);
  border-radius: 6px;
  box-shadow: 0 12px 32px rgba(23, 28, 31, .055);
}
.page-research .work-pane { padding: 24px; }
.page-research .controls-pane { background: #f7f9f7; border-right-color: var(--ui-line); }
.page-research .field-group { margin-top: 19px; padding-top: 17px; border-top-color: var(--ui-line); }
.page-research .group-label {
  margin-bottom: 7px;
  color: var(--ui-accent);
  font-size: 11px;
  font-weight: 850;
}
.page-research .brief {
  min-height: 470px;
  margin-top: 14px;
  color: #24302c;
  background: #fbfcfb;
  border-color: #cbd4cf;
  font-size: 13px;
}
.page-research .reference-wrap { margin-top: 24px; padding-top: 23px; border-top-color: var(--ui-line); }
.page-research .reference-wrap textarea { background: #fbfcfb; }
.page-research .cards { grid-template-columns: repeat(3, minmax(0, 1fr)) minmax(300px, 1.12fr); gap: 10px; }
.page-research .card {
  padding: 16px;
  background: var(--ui-surface);
  border-color: var(--ui-line);
  border-radius: 6px;
  box-shadow: 0 1px 2px rgba(23, 28, 31, .03);
}
.page-research .card:last-child { border-top: 3px solid var(--ui-primary); background: #fbfcfb; }
.page-research .card .actions { border-bottom-color: var(--ui-line); }
.page-research .draft { color: #303a37; }
.page-research .final-editor { background: #fff; }
.page-research .badge { color: #4d5854; background: #edf0ee; border-radius: 4px; }
.page-research .badge.ok { color: #176447; background: #dff3e8; }
.page-research .badge.err { color: #9c2d25; background: #fde8e5; }
.page-research .hot-meta .badge.crypto { color: #88520e; background: var(--ui-accent-soft); }
.page-research .hot-meta .badge.stocks { color: #28588d; background: #e6eef8; }
.page-research .memory-form {
  max-width: 1040px;
  margin-top: 18px;
  padding: 22px;
  background: var(--ui-surface);
  border: 1px solid var(--ui-line);
  border-left: 3px solid var(--ui-primary);
}

/* Supporting pages */
.page-import main, .page-compare main { max-width: 1120px; }
.page-write main { max-width: 1540px; }
.page-import main > h1, .page-compare main > h1, .page-write main > h1 { margin: 0; }
.page-import main > .muted, .page-compare main > .muted, .page-write main > .muted { margin: 7px 0 24px; font-size: 14px; }
.page-import .panel, .page-compare .panel {
  margin-top: 0;
  padding: 24px 0;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--ui-line);
  border-radius: 0;
}
.page-import .panel:first-of-type, .page-compare .panel:first-of-type {
  padding: 24px;
  background: var(--ui-surface);
  border: 1px solid var(--ui-line);
  border-radius: 6px;
  box-shadow: 0 10px 28px rgba(23, 28, 31, .05);
}
.page-import pre, .page-compare pre { color: #e9f1ed; background: #1f2627; border-radius: 5px; }
.page-import input[type="file"] { padding: 8px; background: var(--ui-soft); }
.page-compare .card {
  padding: 15px;
  background: var(--ui-soft);
  border-color: var(--ui-line);
  border-radius: 5px;
}
.page-compare .card strong { color: var(--ui-muted); font-size: 12px; }
.page-write .layout {
  grid-template-columns: 410px minmax(0, 1fr);
  gap: 0;
  overflow: hidden;
  background: var(--ui-surface);
  border: 1px solid var(--ui-line);
  border-radius: 6px;
  box-shadow: 0 12px 32px rgba(23, 28, 31, .055);
}
.page-write .panel { padding: 24px; border: 0; border-radius: 0; }
.page-write .panel:first-child { background: var(--ui-soft); border-right: 1px solid var(--ui-line); }
.page-write .result-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.page-write .result-card { border-color: var(--ui-line); border-radius: 6px; }
.page-write .hint { color: #76531f; background: var(--ui-accent-soft); border-color: #ecc998; border-radius: 5px; }
.page-write .memory { margin-top: 26px; padding-top: 24px; border-top: 1px solid var(--ui-line); }

@media (max-width: 1280px) {
  .page-research .hot-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-research .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 980px) {
  .topbar-inner { gap: 14px; }
  .topnav { overflow-x: auto; }
  .local-status { display: none; }
  .page-research .workspace, .page-write .layout { grid-template-columns: 1fr; }
  .page-research .controls-pane, .page-write .panel:first-child { border-right: 0; border-bottom: 1px solid var(--ui-line); }
  .page-research .hot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .topbar { position: static; }
  .topbar-inner { min-height: auto; padding: 13px 14px; align-items: flex-start; flex-direction: column; gap: 10px; }
  .brand-copy span { display: none; }
  .topnav { width: 100%; padding-bottom: 2px; }
  .nav-link { min-height: 36px; padding: 0 10px; }
  body > main { padding: 22px 14px 52px; }
  h1 { font-size: 27px; }
  .page-research .page-heading { align-items: flex-start; }
  .page-research .workflow { width: 100%; gap: 4px; }
  .page-research .workflow-step { padding: 0 5px; font-size: 12px; }
  .page-research .hot-section, .page-research .results-section, .page-research .memory-section { padding-inline: 0; }
  .page-research .work-pane { padding: 17px; }
  .page-research .hot-grid, .page-research .cards, .page-research .row, .page-research .row.three,
  .page-import .grid, .page-compare .grid, .page-compare .cards, .page-write .result-grid { grid-template-columns: 1fr; }
  .page-research .memory-form, .page-import .panel:first-of-type, .page-compare .panel:first-of-type { padding: 17px; }
}