/* ============================================
   METAR.LIVE — light & minimal blue palette
   优化要点:
   - 单字体族 (Inter system stack), 无 Google Fonts 重型衬线
   - 删除 marquee 跑马灯, 删除 backdrop-filter, 简化阴影
   - 仅保留 1 处 pulse 动画 (LIVE 徽章)
   ============================================ */

:root {
  /* Light blue palette */
  --bg:        #f6f9fc;          /* page background, almost white with blue tint */
  --bg-2:      #eef3f8;
  --panel:     #ffffff;
  --panel-2:   #f8fafd;
  --line:      #dde6ef;
  --line-soft: #ebf0f5;

  --ink:       #1a2942;           /* primary text — deep blue-navy */
  --ink-2:     #5d6e85;
  --ink-3:     #94a3b8;

  /* Accent: soft cornflower / sky blue */
  --blue:        #4a8bdf;
  --blue-soft:   #6ba4ee;
  --blue-deep:   #2563aa;
  --blue-faint:  #e3edf9;
  --blue-line:   #c6d8ee;

  /* Status */
  --green:  #2da46a;
  --red:    #d4524e;

  /* Type — keep it minimal */
  --f-body: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --f-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Layout */
  --maxw: 1240px;
  --radius: 6px;
  --radius-lg: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

::selection { background: var(--blue); color: #fff; }
a { color: inherit; text-decoration: none; }

/* ---------- Mobile blocker ---------- */
.mobile-block {
  display: none;
  position: fixed; inset: 0;
  background: var(--bg);
  z-index: 9999;
  flex-direction: column; align-items: center; justify-content: center;
  padding: 24px; text-align: center;
}
.mobile-block .pin {
  font-family: var(--f-mono);
  color: var(--blue); font-size: 12px; letter-spacing: 0.2em;
  margin-bottom: 24px; font-weight: 600;
}
.mobile-block h1 {
  font-weight: 700; font-size: 28px; margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.mobile-block p { color: var(--ink-2); max-width: 320px; }
.mobile-block.show { display: flex; }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; gap: 32px;
  padding: 14px 32px;
}
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand-logo {
  font-family: var(--f-mono);
  font-weight: 700; font-size: 16px;
  color: var(--blue-deep);
  letter-spacing: 0.04em;
}
.brand-sub {
  font-family: var(--f-mono);
  font-size: 10px; letter-spacing: 0.16em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a {
  font-size: 13px; color: var(--ink-2);
  font-weight: 500;
}
.nav a:hover { color: var(--blue); }

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  font-family: var(--f-mono); font-size: 11px;
}
.lang-toggle button {
  background: transparent; color: var(--ink-2);
  border: 0; padding: 6px 12px; cursor: pointer;
  letter-spacing: 0.06em;
}
.lang-toggle button.active {
  background: var(--blue); color: #fff; font-weight: 600;
}

.btn {
  font-family: var(--f-body);
  font-weight: 600; font-size: 13px;
  padding: 9px 18px;
  border: 0; border-radius: var(--radius);
  cursor: pointer;
}
.btn-primary {
  background: var(--blue); color: #fff;
}
.btn-primary:hover { background: var(--blue-deep); }
.btn-ghost {
  background: transparent; color: var(--ink);
  border: 1px solid var(--blue-line);
}
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }

.wallet-pill {
  display: none;
  font-family: var(--f-mono); font-size: 12px;
  padding: 7px 14px;
  border: 1px solid var(--green);
  color: var(--green);
  border-radius: 999px;
  background: rgba(45, 164, 106, 0.06);
}
.wallet-pill::before {
  content: ''; display: inline-block;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); margin-right: 8px;
}

/* ---------- Hero ---------- */
.hero {
  max-width: var(--maxw); margin: 0 auto;
  padding: 80px 32px 48px;
  position: relative;
  text-align: center;
}
.eyebrow {
  font-family: var(--f-mono);
  font-size: 11px; letter-spacing: 0.2em;
  color: var(--blue);
  text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 8px;
  margin-bottom: 22px;
  font-weight: 600;
}
.eyebrow::before {
  content: ''; width: 8px; height: 8px;
  background: var(--blue); border-radius: 50%;
}
.hero h1 {
  font-size: clamp(40px, 5.5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 auto 24px;
  max-width: 18ch;
}
.hero h1 .accent {
  color: var(--blue);
  font-weight: 700;
}
.hero p.lead {
  max-width: 58ch;
  font-size: 16px;
  color: var(--ink-2);
  margin: 0 auto 36px;
}
.hero-ctas {
  display: flex; gap: 12px;
  align-items: center; justify-content: center;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 64px;
  margin-top: 60px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 32px; font-weight: 700;
  color: var(--blue-deep);
  letter-spacing: -0.02em;
}
.hero-stat .label {
  font-family: var(--f-mono);
  font-size: 10px; letter-spacing: 0.16em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-top: 4px;
}

/* ---------- Section ---------- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 80px 32px;
}
.section-head {
  display: flex; flex-direction: column;
  align-items: center; text-align: center;
  gap: 12px;
  margin-bottom: 48px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}
.section-head h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0;
  max-width: 24ch;
}
.section-head .sub {
  color: var(--ink-2); max-width: 52ch;
  font-size: 14px;
}

/* ---------- Features ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.feature {
  background: var(--panel);
  padding: 32px 30px;
}
.feature .icon {
  font-family: var(--f-mono);
  color: var(--blue);
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.18em;
  margin-bottom: 20px;
  display: inline-block;
  border: 1px solid var(--blue-line);
  padding: 4px 9px;
  border-radius: 4px;
}
.feature h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
.feature p { color: var(--ink-2); margin: 0; font-size: 14px; }

/* ---------- Dashboard ---------- */
.dashboard {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.dash-toolbar {
  display: flex; gap: 14px; align-items: center; flex-wrap: wrap;
  padding: 16px 22px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
}
.search-input {
  flex: 1; min-width: 220px;
  background: #fff; border: 1px solid var(--line);
  color: var(--ink); padding: 9px 13px;
  border-radius: var(--radius);
  font-family: var(--f-mono); font-size: 13px;
  outline: none;
}
.search-input:focus { border-color: var(--blue); }
.region-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  font-family: var(--f-mono); font-size: 11px;
  letter-spacing: 0.08em;
  padding: 5px 11px;
  background: #fff; color: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  text-transform: uppercase;
}
.chip:hover { color: var(--ink); border-color: var(--blue-line); }
.chip.active {
  background: var(--blue); color: #fff;
  border-color: var(--blue); font-weight: 600;
}

.dash-body {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 520px;
}
.city-list {
  border-right: 1px solid var(--line);
  background: var(--panel-2);
  overflow-y: auto;
  max-height: 640px;
}
.city-list::-webkit-scrollbar { width: 6px; }
.city-list::-webkit-scrollbar-thumb { background: var(--line); border-radius: 3px; }

.city-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line-soft);
  cursor: pointer;
}
.city-item:hover { background: var(--blue-faint); }
.city-item.active {
  background: var(--blue-faint);
  border-left: 2px solid var(--blue);
  padding-left: 16px;
}
.city-item .name { font-size: 14px; font-weight: 500; }
.city-item .icao {
  font-family: var(--f-mono); font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
}

/* Display panel */
.display {
  padding: 28px 32px;
  background: var(--panel);
}
.display-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.display-header .station-name {
  font-size: 28px; font-weight: 700; letter-spacing: -0.015em;
  margin: 0 0 4px;
  color: var(--ink);
}
.display-header .icao-tag {
  font-family: var(--f-mono);
  font-size: 12px; letter-spacing: 0.14em;
  color: var(--blue);
  font-weight: 600;
}

.live-badge {
  font-family: var(--f-mono);
  font-size: 10px; letter-spacing: 0.18em;
  color: var(--green);
  border: 1px solid var(--green);
  padding: 3px 9px; border-radius: 999px;
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(45, 164, 106, 0.06);
}
.live-badge::before {
  content: ''; width: 6px; height: 6px;
  background: var(--green); border-radius: 50%;
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}
.metric {
  background: var(--panel);
  padding: 18px 20px;
}
.metric .label {
  font-family: var(--f-mono);
  font-size: 10px; letter-spacing: 0.18em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.metric .value {
  font-size: 32px; font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.1;
  color: var(--ink);
}
.metric .unit {
  font-family: var(--f-mono);
  font-size: 13px; color: var(--ink-3);
  margin-left: 4px; font-weight: 400;
}
.metric.featured .value {
  color: var(--blue-deep);
}
.metric.locked .value {
  color: var(--blue);
  letter-spacing: 0.06em;
}
.metric.locked .lock-cta {
  display: block;
  margin-top: 8px;
  font-family: var(--f-mono); font-size: 10px;
  color: var(--ink-2);
  letter-spacing: 0.1em;
}
.metric.locked .lock-cta a {
  color: var(--blue);
  border-bottom: 1px dashed var(--blue);
}

.raw-metar {
  background: var(--bg-2);
  padding: 16px 20px;
  border: 1px solid var(--blue-line);
  border-radius: var(--radius);
  font-family: var(--f-mono); font-size: 13px;
  color: var(--blue-deep);
  letter-spacing: 0.03em;
  word-break: break-all;
  position: relative;
  margin-bottom: 28px;
  line-height: 1.6;
}
.raw-metar::before {
  content: 'METAR';
  position: absolute; top: -8px; left: 16px;
  background: var(--panel); padding: 0 7px;
  font-size: 9px; color: var(--ink-3); letter-spacing: 0.22em;
}

.history-section h4 {
  font-family: var(--f-mono);
  font-size: 11px; letter-spacing: 0.18em;
  color: var(--ink-3); text-transform: uppercase;
  margin: 0 0 12px;
}
.history-list {
  display: flex; flex-direction: column;
  max-height: 280px; overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.history-list::-webkit-scrollbar { width: 6px; }
.history-list::-webkit-scrollbar-thumb { background: var(--line); border-radius: 3px; }
.history-row {
  display: grid;
  grid-template-columns: 140px 70px 1fr;
  gap: 16px;
  padding: 9px 16px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--f-mono); font-size: 12px;
  align-items: center;
}
.history-row:last-child { border-bottom: 0; }
.history-row .h-time { color: var(--ink-2); }
.history-row .h-temp { color: var(--blue-deep); font-weight: 600; }
.history-row .h-temp.locked { letter-spacing: 0.08em; color: var(--blue); }
.history-row .h-raw {
  color: var(--ink-3); font-size: 11px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.no-data {
  text-align: center; padding: 60px 20px;
  color: var(--ink-3); font-family: var(--f-mono);
  font-size: 13px; letter-spacing: 0.05em;
}

/* ---------- Pricing ---------- */
.pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.plan {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
}
.plan:hover { border-color: var(--blue-line); }
.plan.popular {
  border: 1.5px solid var(--blue);
  background: var(--panel);
}
.plan.popular::before {
  content: attr(data-popular);
  position: absolute;
  top: -10px; right: 20px;
  background: var(--blue); color: #fff;
  font-family: var(--f-mono); font-weight: 600;
  font-size: 10px; letter-spacing: 0.14em;
  padding: 4px 10px; border-radius: 4px;
}
.plan .plan-name {
  font-family: var(--f-mono);
  font-size: 11px; letter-spacing: 0.18em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 14px;
  font-weight: 600;
}
.plan .price {
  font-size: 44px; font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1; margin: 0;
  color: var(--ink);
}
.plan .price .currency {
  font-size: 18px; color: var(--ink-2);
  vertical-align: top; margin-right: 3px;
}
.plan .price .period {
  font-size: 13px; font-family: var(--f-mono);
  color: var(--ink-3); margin-left: 5px;
  font-weight: 500;
}
.plan .save {
  display: inline-block; margin-top: 6px;
  font-family: var(--f-mono); font-size: 11px;
  color: var(--green); letter-spacing: 0.08em;
  font-weight: 600;
}
.plan ul {
  list-style: none; padding: 0; margin: 22px 0;
  display: flex; flex-direction: column; gap: 8px;
}
.plan ul li {
  font-size: 13px; color: var(--ink-2);
  padding-left: 20px; position: relative;
}
.plan ul li::before {
  content: ''; position: absolute;
  left: 0; top: 9px;
  width: 10px; height: 1px; background: var(--blue);
}
.plan .btn { width: 100%; padding: 12px; font-size: 13px; }

/* ---------- Modal ---------- */
.modal-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(26, 41, 66, 0.55);
  z-index: 1000;
  align-items: center; justify-content: center;
}
.modal-backdrop.show { display: flex; }
.modal {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  width: min(460px, 92vw);
  padding: 28px;
  position: relative;
}
.modal h3 {
  font-size: 22px; font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 20px;
}
.modal .row {
  display: flex; justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}
.modal .row:last-of-type { border-bottom: 0; margin-bottom: 18px; }
.modal .row .k {
  color: var(--ink-3); font-family: var(--f-mono);
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
}
.modal .row .v { font-weight: 600; }
.modal .row .v.amount {
  font-size: 20px; color: var(--blue-deep);
  font-weight: 700;
}
.modal .status-line {
  font-family: var(--f-mono); font-size: 11px;
  color: var(--blue); letter-spacing: 0.08em;
  margin-top: 12px; min-height: 16px;
}
.modal .close {
  position: absolute; top: 14px; right: 14px;
  background: transparent; border: 0;
  color: var(--ink-3); cursor: pointer;
  font-size: 20px; line-height: 1;
}
.modal .close:hover { color: var(--ink); }

.success { text-align: center; padding: 10px 0; }
.success .check {
  font-size: 48px; color: var(--green);
  margin-bottom: 10px;
}
.success p { color: var(--ink-2); margin: 0 0 22px; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 32px 32px;
  max-width: var(--maxw); margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  gap: 22px; flex-wrap: wrap;
  color: var(--ink-3); font-size: 12px;
}
.footer .copy { font-family: var(--f-mono); letter-spacing: 0.06em; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .features { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .dash-body { grid-template-columns: 1fr; }
  .city-list { border-right: 0; border-bottom: 1px solid var(--line); max-height: 280px; }
  .hero-stats { gap: 28px; }
}