:root {
  --paper: #f4f6ef;
  --surface: #ffffff;
  --ink: #17201d;
  --muted: #5b6762;
  --line: #d7ddd2;
  --jade: #157a6e;
  --cinnabar: #b64735;
  --indigo: #4157a8;
  --gold: #9a6b00;
  --shadow: 0 18px 42px rgba(23, 32, 29, 0.09);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 18px;
  min-height: 78px;
  padding: 14px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  text-decoration: none;
}

.brand img {
  flex: 0 0 auto;
}

.brand span {
  display: grid;
  gap: 1px;
}

.brand strong {
  font-size: 1.08rem;
  letter-spacing: 0;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.console {
  max-width: 720px;
  padding: 34px 0 22px;
  border-top: 1px solid var(--line);
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: 2.35rem;
  line-height: 1.08;
  letter-spacing: 0;
}

.lede {
  max-width: 620px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.tools-section {
  padding: 18px 0 34px;
}

.section-heading {
  margin-bottom: 18px;
}

.section-heading h2 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: 0;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.tool-card {
  --accent: var(--jade);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 16px;
  min-height: 266px;
  padding: 18px;
  border: 1px solid var(--line);
  border-top: 5px solid var(--accent);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.accent-cinnabar {
  --accent: var(--cinnabar);
}

.accent-jade {
  --accent: var(--jade);
}

.accent-indigo {
  --accent: var(--indigo);
}

.tool-card-header {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
}

.tool-icon {
  width: 54px;
  height: 54px;
}

.tool-card h3 {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: 0;
}

.tool-card-header p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.signals {
  display: grid;
  gap: 8px;
  align-content: start;
  margin: 0;
  padding: 0;
  list-style: none;
}

.signals li {
  min-height: 34px;
  padding: 7px 10px;
  border-left: 3px solid var(--accent);
  background: #f8faf5;
  color: var(--ink);
  font-size: 0.93rem;
}

.open-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
}

.open-link:hover,
.open-link:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 24%, transparent);
  outline-offset: 2px;
}

.link-icon {
  font-size: 1rem;
}

.loading {
  grid-column: 1 / -1;
  margin: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 26px 0 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 920px) {
  .tool-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .app-shell {
    width: min(100% - 20px, 1180px);
  }

  .console {
    min-height: 0;
    padding: 24px 0 18px;
  }

  h1 {
    font-size: 2rem;
  }

  .lede {
    font-size: 1rem;
  }

  .tool-card {
    min-height: 0;
  }
}