:root {
  color-scheme: light;

  --bg: #f3f6f9;
  --surface: #ffffff;
  --surface-2: #eef4fb;
  --text: #17202a;
  --muted: #667383;
  --line: #d9e1ea;
  --brand: #0b5cab;
  --ok: #19764a;
  --warn: #a36300;
  --bad: #b42318;

  --layout-max: 980px;
  --gutter: clamp(12px, 3vw, 20px);

  --s1: 4px;
  --s2: 8px;
  --s3: 12px;
  --s4: 16px;
  --s5: 20px;
  --s6: 24px;

  --radius-sm: 10px;
  --radius-md: 12px;
  --radius-lg: 14px;
  --shadow: 0 6px 22px rgba(23,32,42,.08);

  --control-h: 44px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  min-height: 100%;
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 0;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  padding-bottom: calc(76px + env(safe-area-inset-bottom));
}

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

button { touch-action: manipulation; }

h1,
h2,
h3,
p { overflow-wrap: anywhere; }

/* ---------- Top layout shell ---------- */
.top-shell {
  position: sticky;
  top: 0;
  z-index: 40;
  width: 100%;
  background: rgba(243,246,249,.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.appbar {
  width: min(var(--layout-max), 100%);
  margin: 0 auto;
  padding: calc(var(--s3) + env(safe-area-inset-top)) var(--gutter) var(--s2);
}

.appbar-main {
  min-height: 40px;
  display: grid;
  grid-template-columns: minmax(0,1fr) auto minmax(0,1fr);
  align-items: center;
  gap: var(--s2);
}

.appbar-spacer { min-width: 0; }

.appbar-title-wrap {
  min-width: 0;
  text-align: center;
}

h1 {
  margin: 0;
  font-size: 21px;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.icon-button {
  justify-self: end;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--brand);
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 700;
}

.hidden { display: none !important; }

/* Tabs live in normal flow inside the same sticky shell.
   No hard-coded top offset => no overlap on iPhone safe areas. */
.tabs {
  width: min(var(--layout-max), 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--s2);
  overflow-x: auto;
  overflow-y: hidden;
  padding: var(--s2) 0 var(--s3);
  scroll-padding-inline: var(--gutter);
  scrollbar-width: none;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.tabs::before,
.tabs::after {
  content: "";
  flex: 0 0 var(--gutter);
  width: var(--gutter);
}

.tabs::-webkit-scrollbar { display: none; }

.tab {
  flex: 0 0 auto;
  scroll-snap-align: start;
  min-height: 36px;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  padding: 7px 12px;
  font-size: 13px;
  line-height: 1;
  font-weight: 700;
  transition: background-color .22s ease, color .22s ease, border-color .22s ease, transform .22s ease;
}

.tab.active {
  color: #fff;
  border-color: var(--brand);
  background: var(--brand);
  transform: translateY(-1px);
}

.tab.complete:not(.active)::after {
  content: " ✓";
  color: var(--ok);
}

/* ---------- Main grid ---------- */
.view {
  width: min(var(--layout-max), 100%);
  margin: 0 auto;
  padding: var(--s4) var(--gutter) var(--s6);
  display: grid;
  gap: var(--s3);
  transform-origin: center top;
  will-change: transform, opacity;
}

.section-card {
  min-width: 0;
  margin: 0;
  padding: var(--s4);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.section-card > :first-child { margin-top: 0; }
.section-card > :last-child { margin-bottom: 0; }

.section-card h2 {
  margin: 0 0 var(--s2);
  font-size: 18px;
  line-height: 1.3;
}

.section-card h3 {
  margin: 0 0 var(--s3);
  font-size: 15px;
  line-height: 1.35;
}

.gate-header-card > h2 {
  text-align: center;
  margin-bottom: var(--s3);
}

.center-card { text-align: center; }

.center-title-card > h2 {
  text-align: center;
}

.help {
  margin: 0 0 var(--s4);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

/* ---------- Form grid ---------- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: var(--s3);
}

.form-grid.one { grid-template-columns: minmax(0,1fr); }

.field {
  min-width: 0;
  display: grid;
  gap: 6px;
  align-content: start;
}

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

.field label {
  color: #465362;
  font-size: 12px;
  line-height: 1.35;
  font-weight: 700;
}

.input,
.select,
.textarea {
  width: 100%;
  min-width: 0;
  min-height: var(--control-h);
  border: 1px solid #cbd5df;
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  padding: 10px 12px;
  outline: none;
}

.textarea {
  min-height: 88px;
  resize: vertical;
  line-height: 1.4;
}

.input:focus,
.select:focus,
.textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(11,92,171,.12);
}

/* ---------- Buttons ---------- */
.quickbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s2);
  margin: 0 0 var(--s3);
}

.center-card .quickbar { justify-content: center; }

.btn {
  min-height: var(--control-h);
  border: 0;
  border-radius: 11px;
  padding: 10px 14px;
  font-weight: 750;
  cursor: pointer;
}

.btn.primary { color: #fff; background: var(--brand); }
.btn.secondary { color: #344255; background: #e9eef4; }
.btn.success { color: #0c5d39; background: #e3f4eb; }
.btn.warning { color: #7a4900; background: #fff0cf; }
.btn.danger { color: #fff; background: var(--bad); }

.btn.small {
  min-height: 36px;
  padding: 7px 10px;
  border-radius: 9px;
  font-size: 12px;
}

/* ---------- Gate dashboard ---------- */
.gate-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: var(--s2);
  margin: var(--s3) 0;
}

.metric {
  min-width: 0;
  padding: 10px 8px;
  text-align: center;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
}

.metric strong {
  display: block;
  font-size: 18px;
  line-height: 1.1;
}

.metric span {
  display: block;
  margin-top: var(--s1);
  color: var(--muted);
  font-size: 11px;
  line-height: 1.25;
}

.progressbar {
  height: 8px;
  margin: var(--s2) 0 var(--s1);
  overflow: hidden;
  border-radius: 999px;
  background: #dfe6ee;
}

.progressbar > div {
  height: 100%;
  background: var(--brand);
  transition: width .2s ease;
}

.progress-text {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

/* ---------- Turnstile list ---------- */
.turnstile-list {
  display: grid;
  gap: var(--s2);
}

.turnstile {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.turnstile > summary {
  list-style: none;
  min-width: 0;
  display: grid;
  grid-template-columns: 32px minmax(0,1fr) auto;
  align-items: center;
  gap: var(--s2);
  padding: 10px 12px;
  cursor: pointer;
}

.turnstile > summary::-webkit-details-marker { display: none; }

.row-number {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #eef1f5;
  font-size: 12px;
  font-weight: 750;
}

.turn-code {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 800;
}

.status-pill {
  max-width: 150px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border-radius: 999px;
  padding: 5px 8px;
  background: #eef1f5;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
}

.status-pill.ok { background: #e2f5ea; color: var(--ok); }
.status-pill.warn { background: #fff0cf; color: #835000; }
.status-pill.bad { background: #fde8e6; color: var(--bad); }

.turn-body {
  min-width: 0;
  padding: var(--s3);
  border-top: 1px solid var(--line);
  background: #fbfcfd;
}

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

.turn-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--s2);
  margin-top: var(--s3);
}

/* ---------- Export ---------- */
.export-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: var(--s3);
  text-align: left;
}

.export-card {
  min-width: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: var(--s2);
  padding: var(--s4);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.center-card .export-card { text-align: center; }

.export-card h3 { margin: 0; }

.export-card p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.export-card .btn {
  width: 100%;
  align-self: end;
}

.note {
  padding: 11px 12px;
  border-radius: var(--radius-sm);
  background: #edf5ff;
  color: #32506e;
  font-size: 12px;
  line-height: 1.45;
}

.center-card .note { text-align: center; }

/* ---------- Fixed bottom navigation ---------- */
.bottom-bar {
  position: fixed;
  z-index: 50;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: min(var(--layout-max), 100%);
  display: grid;
  grid-template-columns: minmax(88px,auto) minmax(0,1fr) minmax(88px,auto);
  align-items: center;
  gap: var(--s2);
  padding: 10px var(--gutter) calc(10px + env(safe-area-inset-bottom));
  background: rgba(255,255,255,.97);
  border-top: 1px solid var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.footer-progress {
  min-width: 0;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

/* ---------- Feedback / dialog ---------- */
.toast {
  position: fixed;
  z-index: 70;
  left: 50%;
  bottom: calc(86px + env(safe-area-inset-bottom));
  transform: translate(-50%,16px);
  width: max-content;
  max-width: calc(100% - (var(--gutter) * 2));
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: #17202a;
  color: #fff;
  font-size: 13px;
  line-height: 1.35;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: .2s ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%,0);
}

.dialog {
  width: min(420px,calc(100% - (var(--gutter) * 2)));
  padding: 0;
  border: 0;
  border-radius: 16px;
  box-shadow: 0 20px 70px rgba(0,0,0,.25);
}

.dialog::backdrop { background: rgba(20,30,40,.44); }

.dialog form { padding: 18px; }

.dialog h2 {
  margin: 0 0 var(--s2);
  font-size: 18px;
}

.dialog p {
  color: var(--muted);
  line-height: 1.45;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--s2);
  margin-top: var(--s4);
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: var(--gutter);
  background: rgba(245,248,251,.93);
}

.loading-box {
  width: min(360px,100%);
  padding: var(--s5);
  text-align: center;
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.spinner {
  width: 34px;
  height: 34px;
  margin: 0 auto var(--s3);
  border: 4px solid #dae6f3;
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Responsive grid ---------- */
@media (max-width: 680px) {
  :root { --gutter: 14px; }

  .appbar { padding-bottom: 6px; }

  h1 { font-size: 20px; }

  .tabs {
    padding-top: 6px;
    padding-bottom: 10px;
  }

  .view {
    padding-top: var(--s3);
    padding-bottom: var(--s5);
  }

  .section-card { padding: var(--s3); }

  .form-grid,
  .turn-body .form-grid,
  .export-grid {
    grid-template-columns: minmax(0,1fr);
  }

  .field.full { grid-column: auto; }

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

  .turnstile > summary {
    grid-template-columns: 30px minmax(0,1fr);
  }

  .status-pill {
    grid-column: 2;
    justify-self: start;
    max-width: 100%;
  }

  .quickbar .btn {
    flex: 1 1 160px;
  }

  .bottom-bar {
    grid-template-columns: minmax(78px,auto) minmax(0,1fr) minmax(78px,auto);
  }

  .bottom-bar .btn {
    min-height: 42px;
    padding-inline: 12px;
  }
}

@media (max-width: 380px) {
  .appbar-main {
    grid-template-columns: minmax(0,1fr) auto minmax(0,1fr);
    gap: 6px;
  }

  h1 { font-size: 18px; }

  .icon-button {
    justify-self: end;
    padding-inline: 9px;
  }

  .gate-summary { gap: 6px; }

  .metric { padding-inline: 6px; }

  .footer-progress { font-size: 11px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #11161c;
    --surface: #171e26;
    --surface-2: #202b36;
    --text: #edf2f6;
    --muted: #9cabb9;
    --line: #2d3945;
    --brand: #4fa3ff;
    --shadow: none;
  }

  .top-shell,
  .bottom-bar {
    background: rgba(23,30,38,.96);
  }

  .input,
  .select,
  .textarea,
  .turnstile,
  .export-card {
    background: var(--surface);
    border-color: #374552;
    color: var(--text);
  }

  .turn-body { background: #141a21; }
  .btn.secondary { background: #29333e; color: #e4eaf0; }
  .row-number,
  .status-pill { background: #29333e; }
  .note { background: #18304a; color: #bddbfa; }
}