/* ============================================================
   Carrier Scout — carrierscout.app
   Design system derived from the app's AppTheme + app icon.
   Brand: glass surfaces on deep slate, teal→blue gradient accents.
   No external fonts, no external requests. System stack only.
   ============================================================ */

:root {
  color-scheme: dark;

  /* Palette — sampled from the app icon (#5AC4BE → #6EABC1) and
     AppTheme tints (teal #009EAB, blue #1C7AF5, success/warn/danger). */
  --bg-0: #070C13;
  --bg-1: #0A111B;
  --bg-2: #0E1622;
  --ink-1: #F2F6FA;
  --ink-2: #ADBBCB;
  --ink-3: #7A8A9C;
  --brand-teal: #5AC8C2;
  --brand-blue: #6FB0E8;
  --brand-deep: #0E7C86;
  --grad-brand: linear-gradient(135deg, #5AC8C2 0%, #64A8DC 55%, #7C9FD9 100%);
  --grad-text: linear-gradient(100deg, #7FE0D8 0%, #8FC2F2 60%, #B9CDF5 100%);

  /* Trust ladder — mirrors the app (mint / blue / amber / rose). */
  --tier-trusted: #4ED0A2;
  --tier-ok: #6FB0E8;
  --tier-caution: #EFA23B;
  --tier-high: #F27E93;
  --danger: #E86A6A;

  /* Glass surfaces — AppTheme card/panel language. */
  --glass: rgba(255, 255, 255, 0.045);
  --glass-2: rgba(255, 255, 255, 0.075);
  --stroke: rgba(255, 255, 255, 0.10);
  --stroke-soft: rgba(255, 255, 255, 0.06);

  /* Semantic radii — AppTheme.Radius (chip 12 … hero 28). */
  --r-chip: 12px;
  --r-control: 16px;
  --r-field: 18px;
  --r-panel: 20px;
  --r-card: 24px;
  --r-hero: 28px;

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto,
          Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  --w-page: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-1);
  background: var(--bg-0);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Ambient background glow — echoes the icon gradient. */
.bg-aura {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(56rem 34rem at 82% -6%, rgba(90, 200, 194, 0.14), transparent 62%),
    radial-gradient(48rem 30rem at 6% 16%, rgba(100, 168, 220, 0.11), transparent 60%),
    radial-gradient(60rem 44rem at 50% 118%, rgba(14, 124, 134, 0.16), transparent 64%),
    linear-gradient(180deg, var(--bg-1), var(--bg-0) 42%);
}

::selection { background: rgba(90, 200, 194, 0.35); }

a { color: var(--brand-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 100;
  padding: 10px 16px;
  background: var(--brand-teal);
  color: #04252B;
  border-radius: 0 0 var(--r-chip) 0;
  font-weight: 700;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--brand-teal);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------------- Nav ---------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  background: rgba(8, 13, 21, 0.72);
  border-bottom: 1px solid var(--stroke-soft);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--ink-1);
}
.nav-logo:hover { text-decoration: none; }
.nav-logo img { width: 30px; height: 30px; border-radius: 8px; }
.nav-links {
  display: flex;
  gap: 22px;
  margin-left: auto;
  align-items: center;
}
.nav-links a {
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 600;
}
.nav-links a:hover { color: var(--ink-1); text-decoration: none; }
.nav-cta {
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--grad-brand);
  color: #04252B !important;
  font-weight: 700 !important;
}
.nav-cta:hover { filter: brightness(1.08); }
.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 1px solid var(--stroke);
  color: var(--ink-1);
  border-radius: 10px;
  padding: 7px 12px;
  font-size: 15px;
  font-family: var(--font);
  cursor: pointer;
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px 24px 20px;
    background: rgba(8, 13, 21, 0.97);
    border-bottom: 1px solid var(--stroke-soft);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 4px; font-size: 17px; }
  .nav-cta { text-align: center; margin-top: 8px; }
}

/* ---------------- Type ---------------- */

h1, h2, h3 { line-height: 1.12; letter-spacing: -0.022em; margin: 0; }

.display {
  font-size: clamp(2.5rem, 5.6vw, 4.1rem);
  font-weight: 800;
}
.display .grad {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.h-section {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 800;
}
.h-card { font-size: 1.12rem; font-weight: 700; letter-spacing: -0.01em; }

.lede {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--ink-2);
  max-width: 38em;
}
.muted { color: var(--ink-2); }
.small { font-size: 0.92rem; color: var(--ink-3); }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.83rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand-teal);
  margin-bottom: 14px;
}
.kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
}

/* ---------------- Sections & cards ---------------- */

.section { padding: clamp(64px, 9vw, 110px) 0; }
.section-head { max-width: 640px; margin-bottom: clamp(30px, 4vw, 52px); }

.card {
  background: var(--glass);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--r-card);
  padding: 26px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
  position: relative;
  overflow: hidden;
}
.card::before {
  /* AppSurface top-left accent bloom */
  content: "";
  position: absolute;
  top: -34px;
  left: -34px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(90, 200, 194, 0.08);
  filter: blur(26px);
  pointer-events: none;
}

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.icon-tile {
  width: 46px;
  height: 46px;
  border-radius: var(--r-control);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  background: rgba(90, 200, 194, 0.12);
  border: 1px solid rgba(90, 200, 194, 0.22);
  color: var(--brand-teal);
}
.icon-tile.blue { background: rgba(111, 176, 232, 0.12); border-color: rgba(111, 176, 232, 0.24); color: var(--brand-blue); }
.icon-tile.amber { background: rgba(239, 162, 59, 0.12); border-color: rgba(239, 162, 59, 0.24); color: var(--tier-caution); }
.icon-tile.mint { background: rgba(78, 208, 162, 0.12); border-color: rgba(78, 208, 162, 0.24); color: var(--tier-trusted); }
.icon-tile.rose { background: rgba(242, 126, 147, 0.12); border-color: rgba(242, 126, 147, 0.24); color: var(--tier-high); }
.icon-tile svg { width: 24px; height: 24px; }

.card p { margin: 8px 0 0; color: var(--ink-2); font-size: 0.98rem; }

/* ---------------- Buttons, chips, pills ---------------- */

.btn-row {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

.btn-appstore {
  display: inline-flex;
  border-radius: 13px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.35);
}
.btn-appstore:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(0, 0, 0, 0.45); }
.btn-appstore svg { display: block; height: 54px; width: auto; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 22px;
  border-radius: var(--r-field);
  border: 1px solid var(--stroke);
  background: var(--glass);
  color: var(--ink-1);
  font-weight: 700;
  font-size: 15px;
  transition: border-color 0.18s ease, background 0.18s ease;
}
.btn-ghost:hover { text-decoration: none; border-color: rgba(90, 200, 194, 0.5); background: var(--glass-2); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 650;
  border: 1px solid var(--stroke);
  background: var(--glass);
  color: var(--ink-2);
  white-space: nowrap;
}
.chip .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--brand-teal); }

.tier-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 700;
}
.tier-pill svg { width: 15px; height: 15px; }
.tier-trusted { background: rgba(78, 208, 162, 0.13); border: 1px solid rgba(78, 208, 162, 0.32); color: var(--tier-trusted); }
.tier-ok { background: rgba(111, 176, 232, 0.13); border: 1px solid rgba(111, 176, 232, 0.32); color: var(--tier-ok); }
.tier-caution { background: rgba(239, 162, 59, 0.13); border: 1px solid rgba(239, 162, 59, 0.32); color: var(--tier-caution); }
.tier-high { background: rgba(242, 126, 147, 0.13); border: 1px solid rgba(242, 126, 147, 0.32); color: var(--tier-high); }

/* ---------------- Hero ---------------- */

.hero { padding: clamp(56px, 8vw, 96px) 0 clamp(48px, 6vw, 84px); }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
}

.hero-badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 26px 0 30px;
}
.hero-note { margin-top: 16px; }

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 540px;
}
.hero-visual .halo {
  position: absolute;
  width: min(520px, 92%);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 42%,
    rgba(90, 200, 194, 0.22), rgba(100, 168, 220, 0.10) 46%, transparent 68%);
  filter: blur(6px);
}

.float-chip {
  position: absolute;
  z-index: 3;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.38);
  animation: floaty 7s ease-in-out infinite;
}
@media (max-width: 960px) {
  /* On narrow screens the phone fills the visual — annotations collide. */
  .float-chip { display: none; }
}
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

/* ---------------- Device frame ---------------- */

.device {
  position: relative;
  z-index: 2;
  width: min(320px, 78vw);
  border-radius: 52px;
  padding: 10px;
  background: linear-gradient(160deg, #3A4352, #171D28 70%);
  box-shadow:
    0 34px 80px rgba(0, 0, 0, 0.55),
    0 6px 18px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.14);
}
.device::after {
  /* Dynamic Island */
  content: "";
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: 88px;
  height: 25px;
  border-radius: 999px;
  background: #05070B;
  z-index: 4;
}
.device-screen {
  border-radius: 43px;
  overflow: hidden;
  background: #14171D;
  border: 1px solid rgba(255, 255, 255, 0.05);
}
.device-screen svg { display: block; width: 100%; height: auto; }
.device.tilt-l { transform: rotate(-4deg); }
.device.tilt-r { transform: rotate(4.5deg); }
@media (max-width: 960px) {
  .device.tilt-l, .device.tilt-r { transform: none; }
}

/* ---------------- Trust ladder ---------------- */

.ladder { display: grid; gap: 14px; }
.ladder-row {
  display: grid;
  grid-template-columns: 158px 1fr;
  gap: 18px;
  align-items: center;
  padding: 16px 20px;
  border-radius: var(--r-panel);
  background: var(--glass);
  border: 1px solid var(--stroke-soft);
}
@media (max-width: 620px) {
  .ladder-row { grid-template-columns: 1fr; gap: 8px; }
}
.ladder-row p { margin: 0; color: var(--ink-2); font-size: 0.97rem; }

.signal-cloud { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.signal-cloud .chip { font-weight: 600; }
.chip .up { color: var(--tier-trusted); }
.chip .down { color: var(--tier-high); }

/* ---------------- Plans ---------------- */

.plan-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}
@media (max-width: 960px) { .plan-strip { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 620px) { .plan-strip { grid-template-columns: repeat(2, 1fr); } }

.plan {
  padding: 20px 18px;
  border-radius: var(--r-panel);
  background: var(--glass);
  border: 1px solid var(--stroke-soft);
  text-align: center;
}
.plan .n { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em; }
.plan .t { font-weight: 700; font-size: 0.95rem; margin-top: 2px; }
.plan .d { color: var(--ink-3); font-size: 0.82rem; margin-top: 6px; line-height: 1.45; }
.plan.hi {
  background: linear-gradient(160deg, rgba(90, 200, 194, 0.14), rgba(100, 168, 220, 0.07));
  border-color: rgba(90, 200, 194, 0.35);
}
.plan .n small { font-size: 0.9rem; font-weight: 700; color: var(--ink-3); }

.volume-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

/* ---------------- FAQ ---------------- */

.faq { max-width: 780px; }
.faq details {
  border: 1px solid var(--stroke-soft);
  border-radius: var(--r-panel);
  background: var(--glass);
  padding: 4px 22px;
  margin-bottom: 12px;
}
.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 16px 0;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--brand-teal);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 18px; color: var(--ink-2); }

/* ---------------- Footer ---------------- */

.footer {
  border-top: 1px solid var(--stroke-soft);
  padding: 48px 0 56px;
  margin-top: 30px;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.footer a { color: var(--ink-2); }
.footer a:hover { color: var(--ink-1); }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.legal {
  margin-top: 26px;
  font-size: 0.82rem;
  color: var(--ink-3);
  max-width: 62em;
}

/* ---------------- Prose pages (privacy / support) ---------------- */

.prose {
  max-width: 46rem;
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) 24px 80px;
}
.prose h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 800; }
.prose h2 { font-size: 1.25rem; font-weight: 700; margin-top: 2.3rem; }
.prose h3 { font-size: 1.05rem; font-weight: 700; margin-top: 1.8rem; }
.prose p, .prose li { color: var(--ink-2); }
.prose strong { color: var(--ink-1); }
.prose ul { padding-left: 1.25rem; }
.prose li { margin: 0.45rem 0; }
.updated { color: var(--ink-3); font-size: 0.95rem; margin-top: 0.4rem; }
.cta-inline {
  display: inline-block;
  margin: 1.1rem 0;
  padding: 13px 22px;
  border-radius: var(--r-field);
  background: var(--grad-brand);
  color: #04252B;
  font-weight: 750;
}
.cta-inline:hover { text-decoration: none; filter: brightness(1.07); }

/* ---------------- Store kit page ---------------- */

.kit {
  max-width: 60rem;
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) 24px 90px;
}
.kit h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); font-weight: 800; }
.kit h2 {
  font-size: 1.35rem;
  font-weight: 750;
  margin: 3rem 0 0.4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--stroke-soft);
}
.kit h3 { font-size: 1.02rem; font-weight: 700; margin: 1.6rem 0 0.5rem; }
.kit p, .kit li { color: var(--ink-2); }
.kit strong { color: var(--ink-1); }

.field-block {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--r-control);
  padding: 18px 84px 18px 20px;
  margin: 10px 0 6px;
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-wrap: break-word;
  color: #D7E3EE;
}
.field-meta {
  display: flex;
  gap: 14px;
  align-items: baseline;
  flex-wrap: wrap;
  margin-bottom: 2px;
}
.field-meta .lim { font-size: 0.8rem; color: var(--ink-3); font-family: var(--mono); }
.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink-2);
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 700;
  border-radius: 9px;
  padding: 5px 11px;
  cursor: pointer;
}
.copy-btn:hover { color: var(--ink-1); border-color: rgba(90, 200, 194, 0.5); }
.copy-btn.done { color: var(--tier-trusted); border-color: rgba(78, 208, 162, 0.5); }

.kit table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 0.92rem;
}
.kit th, .kit td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--stroke-soft);
  vertical-align: top;
}
.kit th { color: var(--ink-1); font-weight: 700; white-space: nowrap; }
.kit td { color: var(--ink-2); }
.kit td code, .kit li code, .kit p code {
  font-family: var(--mono);
  font-size: 0.84em;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 6px;
  padding: 2px 6px;
  color: #CFE6EA;
}
.todo {
  display: inline-block;
  background: rgba(239, 162, 59, 0.14);
  border: 1px solid rgba(239, 162, 59, 0.35);
  color: var(--tier-caution);
  font-size: 0.78rem;
  font-weight: 750;
  border-radius: 7px;
  padding: 2px 8px;
  vertical-align: middle;
}
.kit-toc {
  background: var(--glass);
  border: 1px solid var(--stroke-soft);
  border-radius: var(--r-panel);
  padding: 18px 24px;
  margin: 22px 0;
}
.kit-toc ol { margin: 8px 0 4px; padding-left: 1.3rem; }
.kit-toc li { margin: 4px 0; }

/* ---------------- Reveal on scroll ---------------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}