:root {
  --bg: #101418;
  --panel: #fffaf0;
  --panel-soft: #f7f2e8;
  --ink: #17212b;
  --muted: #66717b;
  --accent: #1f8a70;
  --accent-strong: #116c58;
  --line: rgba(23, 33, 43, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, "Microsoft JhengHei", "Noto Sans TC", sans-serif;
}

button,
input,
select {
  font: inherit;
}

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

.site-page {
  min-height: 100vh;
  background:
    linear-gradient(rgba(16, 20, 24, 0.68), rgba(16, 20, 24, 0.42)),
    url("../assets/scenes/taipei-airport-arrival.png") center / cover fixed,
    var(--bg);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 64px;
  padding: 14px 24px;
  background: rgba(16, 20, 24, 0.9);
  color: white;
}

.brand {
  font-size: 20px;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
}

.site-nav a {
  opacity: 0.92;
}

.nav-button,
.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 14px;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 700;
}

.nav-button,
.primary-action {
  background: var(--accent);
  color: white;
}

.secondary-action {
  border-color: var(--line);
  background: var(--panel);
  color: var(--ink);
}

.home-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  gap: 28px;
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 72px 0;
}

.home-copy {
  align-self: end;
  padding: 28px 0;
  color: white;
}

.eyebrow {
  margin: 0 0 10px;
  color: #77d3bd;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 0.96;
  letter-spacing: 0;
}

.lead {
  max-width: 680px;
  margin: 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 20px;
  line-height: 1.5;
}

.home-actions,
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.feature-list,
.form-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 250, 240, 0.96);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

.feature-list {
  display: grid;
  gap: 0;
  align-self: start;
}

.feature-list article {
  padding: 22px;
}

.feature-list h2 {
  margin: 0 0 8px;
  font-size: 20px;
}

.feature-list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.form-layout {
  display: grid;
  place-items: start center;
  min-height: calc(100vh - 64px);
  padding: 48px 16px;
}

.form-panel {
  width: min(480px, 100%);
  padding: 28px;
}

.wide-form {
  width: min(760px, 100%);
}

.form-panel h1 {
  color: var(--ink);
  font-size: 36px;
  line-height: 1.05;
}

form {
  display: grid;
  gap: 18px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

input,
select {
  width: 100%;
  min-height: 42px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: white;
  color: var(--ink);
}

.check-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.check-panel legend {
  padding: 0 6px;
  font-weight: 700;
}

.check-panel label {
  display: flex;
  align-items: center;
  gap: 8px;
}

.check-panel input {
  width: 18px;
  min-height: 18px;
}

.form-error,
.form-success {
  margin: 0 0 16px;
  padding: 10px 12px;
  border-radius: 4px;
}

.form-error {
  background: #fde8e5;
  color: #8a2b1f;
}

.form-success {
  background: #e2f5ee;
  color: #116c58;
}

@media (max-width: 800px) {
  .site-header,
  .site-nav,
  .home-actions,
  .form-actions {
    align-items: stretch;
  }

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

  .home-layout {
    grid-template-columns: 1fr;
    padding-top: 36px;
  }

  .field-grid {
    grid-template-columns: 1fr;
  }
}