:root {
  color-scheme: dark;
  --bg: #080b10;
  --surface: #111722;
  --surface-2: #151d2b;
  --line: #263244;
  --text: #e9eef7;
  --muted: #94a3b8;
  --accent: #42d3a5;
  --accent-2: #60a5fa;
  --danger: #fb7185;
  --warning: #fbbf24;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 15% 0%, rgba(66, 211, 165, 0.12), transparent 32rem),
    radial-gradient(circle at 90% 10%, rgba(96, 165, 250, 0.11), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.site-header,
.site-footer,
main {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 750;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(66, 211, 165, 0.55);
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(66, 211, 165, 0.18), rgba(96, 165, 250, 0.12));
  color: var(--accent);
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.top-nav a,
.pill-link {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--muted);
  font-size: 0.92rem;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.top-nav a:hover,
.pill-link:hover {
  border-color: rgba(66, 211, 165, 0.7);
  background: rgba(66, 211, 165, 0.08);
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 32px;
  align-items: end;
  padding: 72px 0 44px;
}

.compact-hero {
  min-height: 360px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 850px;
  margin-bottom: 18px;
  font-size: clamp(2.2rem, 6vw, 5.4rem);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.hero-copy {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.status-panel {
  display: grid;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(17, 23, 34, 0.82);
  box-shadow: var(--shadow);
  padding: 22px;
}

.status-panel span,
.status-panel small {
  color: var(--muted);
}

.status-panel strong {
  font-size: 1.55rem;
}

.section-heading {
  margin: 18px 0;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  padding-bottom: 42px;
}

.tool-card {
  display: grid;
  min-height: 280px;
  align-content: space-between;
  gap: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(21, 29, 43, 0.96), rgba(12, 17, 25, 0.96));
  padding: 20px;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: rgba(66, 211, 165, 0.65);
  background: linear-gradient(180deg, rgba(24, 35, 50, 0.98), rgba(12, 17, 25, 0.98));
}

.tool-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.card-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  color: var(--accent);
  font-weight: 800;
}

.card-action {
  color: var(--accent);
  font-weight: 750;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  border-top: 1px solid var(--line);
  padding: 24px 0 36px;
  color: var(--muted);
  font-size: 0.92rem;
}

.tool-page {
  padding: 38px 0 48px;
}

.tool-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.85fr);
  gap: 18px;
  align-items: start;
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(17, 23, 34, 0.9);
  box-shadow: var(--shadow);
  padding: 18px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.panel-header h2,
.panel-header h3 {
  margin-bottom: 0;
}

.form-grid {
  display: grid;
  gap: 14px;
}

.input-row {
  display: grid;
  gap: 7px;
}

.split-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

label {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #0b1018;
  color: var(--text);
  outline: none;
  padding: 11px 12px;
}

textarea {
  min-height: 260px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(66, 211, 165, 0.8);
  box-shadow: 0 0 0 3px rgba(66, 211, 165, 0.12);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
  color: var(--text);
  padding: 9px 13px;
  font-weight: 750;
}

.btn.primary {
  border-color: rgba(66, 211, 165, 0.7);
  background: var(--accent);
  color: #03120d;
}

.btn.danger {
  border-color: rgba(251, 113, 133, 0.45);
  color: #fecdd3;
}

.output {
  min-height: 260px;
  overflow: auto;
  white-space: pre-wrap;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #070a0f;
  padding: 14px;
  color: #dbeafe;
}

.output.placeholder {
  color: var(--muted);
}

.summary-list {
  display: grid;
  gap: 12px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.metric {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
  padding: 12px;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.metric strong {
  font-size: 1.35rem;
}

.record-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.record-item {
  display: grid;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
  padding: 12px;
}

.record-item header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.record-item strong {
  overflow-wrap: anywhere;
}

.record-meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 20;
  max-width: min(360px, calc(100vw - 36px));
  border: 1px solid rgba(66, 211, 165, 0.55);
  border-radius: var(--radius);
  background: #0d1714;
  color: var(--text);
  padding: 11px 13px;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 940px) {
  .hero,
  .tool-shell {
    grid-template-columns: 1fr;
  }

  .tool-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .top-nav {
    justify-content: flex-start;
  }

  .hero {
    padding-top: 42px;
  }

  .tool-grid,
  .split-row,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .tool-card {
    min-height: 220px;
  }

  .site-footer {
    flex-direction: column;
  }
}