:root {
  --bg: #09111f;
  --panel: rgba(11, 24, 44, 0.86);
  --panel-strong: rgba(13, 28, 50, 0.96);
  --line: rgba(160, 196, 255, 0.18);
  --text: #edf3ff;
  --muted: #9fb4d1;
  --accent: #5cc6ff;
  --accent-soft: rgba(92, 198, 255, 0.18);
  --success: #1e8e5a;
  --warning: #c17900;
  --danger: #c5221f;
  --radius: 20px;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.38);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(0, 184, 255, 0.22), transparent 32%),
    radial-gradient(circle at bottom right, rgba(255, 144, 77, 0.16), transparent 28%),
    linear-gradient(160deg, #08101c, #0d1f36 42%, #0a1829 100%);
  color: var(--text);
}

body {
  min-height: 100vh;
}

.app-shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 24px;
  align-items: center;
  padding: 28px 32px;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #78d3ff;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  line-height: 1.05;
}

.hero-text {
  max-width: 48rem;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.03rem;
  line-height: 1.7;
}

.hero-accent {
  position: relative;
  min-height: 260px;
  border-radius: 28px;
  background:
    linear-gradient(160deg, rgba(82, 204, 255, 0.22), rgba(5, 16, 30, 0.1)),
    rgba(8, 19, 35, 0.55);
  border: 1px solid rgba(170, 216, 255, 0.16);
  overflow: hidden;
}

.ring {
  position: absolute;
  border: 1px solid rgba(160, 225, 255, 0.35);
  border-radius: 999px;
}

.ring-a {
  inset: 26px 24px auto auto;
  width: 230px;
  height: 230px;
}

.ring-b {
  inset: auto auto 22px 30px;
  width: 160px;
  height: 160px;
}

.marker {
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 12px rgba(92, 198, 255, 0.1);
}

.marker-a {
  top: 54px;
  right: 98px;
}

.marker-b {
  left: 72px;
  bottom: 66px;
}

.surface,
.summary-card,
.airport-card,
.flight-meta,
.status-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.surface {
  border-radius: var(--radius);
  padding: 28px;
}

.query-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.field {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.field span {
  color: var(--muted);
  font-size: 0.94rem;
}

.field input,
.field select,
.date-trigger {
  height: 54px;
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(170, 216, 255, 0.16);
  background: rgba(4, 13, 25, 0.72);
  color: var(--text);
  padding: 0 16px;
  font-size: 1rem;
}

.date-trigger {
  text-align: left;
  cursor: pointer;
}

.date-trigger.is-placeholder {
  color: var(--muted);
}

.field input:focus,
.field select:focus,
.date-trigger:focus {
  outline: none;
  border-color: rgba(92, 198, 255, 0.85);
  box-shadow: 0 0 0 4px rgba(92, 198, 255, 0.12);
}

.field-wide {
  grid-column: 1 / -1;
}

[hidden] {
  display: none !important;
}

.manual-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.manual-fields .field-note {
  grid-column: 1 / -1;
}

.field-note {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.date-picker {
  position: absolute;
  z-index: 20;
  top: 74px;
  left: 0;
  width: min(360px, calc(100vw - 48px));
  padding: 16px;
  border-radius: 18px;
  border: 1px solid rgba(170, 216, 255, 0.18);
  background: rgba(4, 13, 25, 0.98);
  box-shadow: var(--shadow);
}

.date-picker-head,
.date-weekdays,
.date-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}

.date-picker-head {
  grid-template-columns: 44px 1fr 44px;
  align-items: center;
  margin-bottom: 12px;
}

.date-picker-head strong {
  text-align: center;
}

.date-picker-head button,
.date-grid button {
  height: 40px;
  border: 1px solid rgba(170, 216, 255, 0.14);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  cursor: pointer;
}

.date-weekdays {
  margin-bottom: 8px;
  color: var(--muted);
  text-align: center;
  font-size: 0.86rem;
}

.date-grid button.selected {
  background: linear-gradient(135deg, #5cc6ff, #4ae0b3);
  color: #05111f;
  font-weight: 700;
}

.date-spacer {
  min-height: 40px;
}

.time-picker {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 10px;
}

.time-picker span {
  color: var(--text);
  font-size: 1.4rem;
  line-height: 1;
}

.actions {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 16px;
}

.actions button {
  min-width: 160px;
  height: 54px;
  border: none;
  border-radius: 16px;
  background: linear-gradient(135deg, #5cc6ff, #4ae0b3);
  color: #05111f;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.actions .secondary-button {
  border: 1px solid rgba(170, 216, 255, 0.22);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.actions button:disabled {
  cursor: progress;
  opacity: 0.72;
}

.status-panel {
  margin-top: 20px;
  padding: 18px 20px;
  border-radius: 18px;
}

.status-panel.error {
  border-color: rgba(255, 112, 112, 0.4);
  color: #ffd7d7;
}

.status-panel.success {
  border-color: rgba(92, 198, 255, 0.3);
}

.result-panel {
  margin-top: 22px;
  display: grid;
  gap: 20px;
}

.result-title {
  margin: 0;
  font-size: 1.45rem;
}

.summary-card {
  border-radius: 24px;
  padding: 24px 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
}

.summary-label {
  margin: 0 0 8px;
  color: var(--muted);
}

.summary-card h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.summary-text {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.risk-detail {
  max-width: 760px;
  white-space: pre-wrap;
}

.risk-info {
  margin-top: 18px;
}

.risk-info h3 {
  margin: 18px 0 6px;
  font-size: 1rem;
  color: var(--text);
}

.risk-badge {
  min-width: 120px;
  height: 120px;
  border-radius: 28px;
  display: grid;
  place-items: center;
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  background: rgba(92, 198, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.flight-meta {
  border-radius: 20px;
  padding: 20px 22px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.meta-item span {
  display: block;
  color: var(--muted);
  margin-bottom: 6px;
}

.meta-item strong {
  font-size: 1.02rem;
}

.airport-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.airport-card {
  border-radius: 24px;
  padding: 24px;
}

.card-topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

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

.mini-risk-tag {
  min-width: 84px;
  text-align: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.92rem;
}

.airport-card h3 {
  margin: 18px 0 6px;
  font-size: 1.45rem;
}

.airport-code {
  margin: 0 0 18px;
  color: #78d3ff;
  letter-spacing: 0.05em;
}

.detail-list {
  display: grid;
  gap: 14px;
  margin: 0;
}

.detail-list div {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(170, 216, 255, 0.1);
}

.detail-list dt {
  color: var(--muted);
}

.detail-list dd {
  margin: 0;
  line-height: 1.55;
}

code {
  font-family: "Cascadia Code", Consolas, monospace;
  color: #b4e5ff;
}

.disclaimer {
  margin: 26px auto 0;
  max-width: 900px;
  padding: 0 18px;
  color: rgba(197, 217, 229, 0.62);
  font-size: 0.78rem;
  line-height: 1.7;
  text-align: left;
  overflow-wrap: anywhere;
}

@media (max-width: 920px) {
  .hero,
  .query-grid,
  .airport-grid,
  .flight-meta,
  .manual-fields {
    grid-template-columns: 1fr;
  }

  .actions,
  .summary-card {
    flex-direction: column;
    align-items: stretch;
  }
  .risk-badge {
    width: 100%;
    height: 78px;
  }
}

@media (max-width: 640px) {
  .app-shell {
    width: min(100vw - 20px, 100%);
    padding: 18px 0 40px;
  }

  .hero,
  .surface,
  .airport-card,
  .summary-card,
  .flight-meta,
  .status-panel {
    padding: 18px;
  }

  .disclaimer {
    padding: 0 16px;
  }

  .detail-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}