/* ============================================================
   BTS Toolbox — web design system
   Ported from app/ui/theme/BtsTheme.kt (Night + Day palettes,
   per-tool accents). JS resolves Auto/Day/Night and stamps
   data-theme="night" | "day" on <html>; night is the no-JS
   fallback because the brand look is dark-first.
   ============================================================ */

:root {
  /* Night palette — BtsNightColors */
  --bg: #0A0F1C;
  --card: #131A2B;
  --card-alt: #1B2336;
  --border: #243049;
  --text-1: #FFFFFF;
  --text-2: #ABB6C9;
  --text-3: rgba(171, 182, 201, 0.65); /* textMuted = textSecondary @ 65% */
  --brand: #FFB300;
  --on-brand: #14110A;
  --tint-alpha: 0.15;                  /* BtsColors.tint() night */

  /* Tool accents — BtsAccents night values */
  --acc-cyan: #22D3EE;
  --acc-amber: #FFB300;
  --acc-violet: #A78BFA;
  --acc-green: #4ADE80;
  --acc-red: #FF5252;
  --acc-teal: #2DD4BF;
  --acc-orange: #FF8A3D;
  --acc-yellow: #FFD60A;
  --acc-blue: #60A5FA;

  --mono: ui-monospace, "Cascadia Mono", Consolas, Menlo, monospace;
  --radius: 12px;
  --radius-sm: 8px;
}

:root[data-theme="day"] {
  /* Day palette — BtsDayColors */
  --bg: #EEF1F5;
  --card: #FFFFFF;
  --card-alt: #F3F5F9;
  --border: #DDE2E9;
  --text-1: #14171C;
  --text-2: #555E6B;
  --text-3: rgba(85, 94, 107, 0.65);
  --brand: #E08A00;
  --on-brand: #14110A;
  --tint-alpha: 0.10;

  /* Tool accents — BtsAccents day values (deep-saturated for sunlight) */
  --acc-cyan: #0E7490;
  --acc-amber: #B45309;
  --acc-violet: #6D28D9;
  --acc-green: #047857;
  --acc-red: #DC2626;
  --acc-teal: #0F766E;
  --acc-orange: #C2410C;
  --acc-yellow: #A16207;
  --acc-blue: #1D4ED8;
}

/* ---------- base ---------- */

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-1);
  font: 15px/1.5 system-ui, "Segoe UI", Roboto, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

button { font: inherit; color: inherit; }

input, select {
  font: inherit;
  color: var(--text-1);
  background: var(--card-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  width: 100%;
  outline: none;
}
input:focus-visible, select:focus-visible, button:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 1px;
}
input::placeholder { color: var(--text-3); }
label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-2);
  margin: 0 0 6px;
}

/* ---------- brand primitives ---------- */

.hazard {
  height: 6px;
  background: repeating-linear-gradient(-45deg,
    var(--brand) 0 12px, #0A0F1C 12px 24px);
}
:root[data-theme="day"] .hazard {
  background: repeating-linear-gradient(-45deg,
    var(--brand) 0 12px, #14171C 12px 24px);
}

.bts-badge {
  background: var(--brand);
  color: var(--on-brand);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  padding: 2px 7px;
  border-radius: 6px;
  user-select: none;
}

/* Faint schematic grid — the brand background texture */
.schematic {
  background-image:
    linear-gradient(color-mix(in srgb, var(--brand) 5%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--brand) 5%, transparent) 1px, transparent 1px);
  background-size: 22px 22px;
}

/* ---------- app chrome ---------- */

#app { min-height: 100%; display: flex; flex-direction: column; }

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  padding-top: max(12px, env(safe-area-inset-top));
}

.topbar .title { flex: 1; min-width: 0; }
.topbar h1 {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.02em;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar .subtitle {
  font-size: 12px;
  color: var(--text-2);
  margin: 0;
}

.iconbtn {
  background: var(--card-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  cursor: pointer;
  flex: none;
}
.iconbtn:hover { border-color: var(--brand); }
.iconbtn svg { width: 20px; height: 20px; }

.accent-chip {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  flex: none;
  background: color-mix(in srgb, var(--accent, var(--brand)) calc(var(--tint-alpha) * 100%), transparent);
  color: var(--accent, var(--brand));
}
.accent-chip svg { width: 26px; height: 26px; }

.content {
  flex: 1;
  width: 100%;
  padding: 16px;
  padding-bottom: max(24px, env(safe-area-inset-bottom));
}

/* ---------- home tiles (app-look) ---------- */

.tilegrid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.tile {
  text-align: left;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 120ms, transform 120ms;
}
.tile:hover { border-color: var(--accent, var(--brand)); }
.tile:active { transform: scale(0.98); }
.tile .t-title { font-weight: 700; font-size: 14.5px; }
.tile .t-sub { font-size: 12px; color: var(--text-2); }
.tile[data-soon] { opacity: 0.45; cursor: default; }
.tile[data-soon]:hover { border-color: var(--border); }
.tile .t-soon {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-3);
  text-transform: uppercase;
}

/* ---------- cards & module UI ---------- */

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
}
.card h2 {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent, var(--brand));
  margin: 0 0 12px;
}

.fieldrow { display: grid; gap: 12px; grid-template-columns: 1fr 1fr; }
.fieldrow .wide { grid-column: 1 / -1; }
.field { min-width: 0; }

/* Selection chips — animated pattern from PowerScreen.kt */
.chiprow { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1px solid var(--border);
  background: var(--card-alt);
  color: var(--text-2);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 140ms;
}
.chip[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent, var(--brand)) calc(var(--tint-alpha) * 100%), transparent);
  color: var(--accent, var(--brand));
  border-color: var(--accent, var(--brand));
}

/* Result strip — BtsResultStrip */
.result-strip {
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--accent, var(--brand)) calc(var(--tint-alpha) * 100%), transparent);
  border: 1px solid color-mix(in srgb, var(--accent, var(--brand)) 40%, transparent);
  padding: 12px 14px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
}
.result-strip .r-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-2);
}
.result-strip .r-value {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent, var(--brand));
  font-variant-numeric: tabular-nums;
  transition: opacity 150ms;
}
.result-strip .r-value.updating { opacity: 0; }
.result-hint { font-size: 12.5px; color: var(--text-3); margin-top: 10px; }

/* ---------- A/B labelled switch (btsSwitchColors pattern) ---------- */

.ab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 6px;
}
.ab > span { font-size: 13px; font-weight: 700; color: var(--text-3); }
.ab > span.on { color: var(--accent, var(--brand)); }
.ab-track {
  width: 44px;
  height: 24px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card-alt);
  position: relative;
  cursor: pointer;
  padding: 0;
  flex: none;
}
.ab-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent, var(--brand));
  transition: left 140ms;
}
.ab-track.right .ab-thumb { left: 22px; }

/* ---------- results table (tinted header, alternating rows) ---------- */

.bts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  font-variant-numeric: tabular-nums;
}
.bts-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-1);
  background: color-mix(in srgb, var(--accent, var(--brand)) calc(var(--tint-alpha) * 100%), transparent);
  padding: 10px 12px;
}
.bts-table td { padding: 10px 12px; border-top: 1px solid var(--border); }
.bts-table tr.alt td { background: var(--card-alt); }
.bts-table .num { text-align: right; font-family: var(--mono); font-weight: 700; color: var(--acc-green); }
.bts-table th.num { color: var(--text-1); font-family: inherit; }
.bts-table .hintcell { text-align: center; color: var(--text-3); font-size: 12.5px; padding: 18px 12px; }
.dim { color: var(--text-2); font-size: 11.5px; font-weight: 400; }

.customrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--accent, var(--brand)) 7%, transparent);
}
.customrow .custecho { flex: 1.2; font-size: 13px; }
.customrow .custres {
  flex: 1;
  text-align: right;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 15px;
  color: var(--acc-green);
  font-variant-numeric: tabular-nums;
}

/* ---------- license gate ---------- */

.gate {
  max-width: 480px;
  margin: 0 auto;
  padding: 32px 20px;
}
.gate .brandmark { text-align: center; margin-bottom: 22px; }
.gate .brandmark .bts-badge { font-size: 15px; padding: 5px 12px; }
.gate .brandmark h1 { font-size: 24px; margin: 12px 0 2px; }
.gate .brandmark p { color: var(--text-2); margin: 0; font-size: 13.5px; }

.devicecode {
  font-family: var(--mono);
  font-size: 19px;
  letter-spacing: 0.15em;
  text-align: center;
  background: var(--card-alt);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  user-select: all;
  margin: 10px 0;
}

.btn {
  display: block;
  width: 100%;
  background: var(--brand);
  color: var(--on-brand);
  font-weight: 800;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px;
  cursor: pointer;
  margin-top: 12px;
}
.btn.secondary {
  background: var(--card-alt);
  color: var(--text-1);
  border: 1px solid var(--border);
  font-weight: 600;
}
.gate .error { color: var(--acc-red); font-size: 13px; margin-top: 10px; }
.gate .ok { color: var(--acc-green); font-size: 13px; margin-top: 10px; }

.license-pill {
  font-size: 11px;
  color: var(--text-3);
  text-align: center;
  padding: 8px;
}

/* ---------- desktop layout (>= 1000px): rail + hero ---------- */

.rail { display: none; }

@media (min-width: 1000px) {
  #app { flex-direction: row; }

  .rail:empty { display: none; } /* gated: no chrome */
  .rail {
    display: flex;
    flex-direction: column;
    width: 232px;
    flex: none;
    border-right: 1px solid var(--border);
    background: var(--card);
    padding: 18px 12px;
    gap: 4px;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
  }
  .rail .brandrow {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 8px 14px;
  }
  .rail .brandrow .name { font-weight: 800; letter-spacing: 0.02em; }
  .rail .navitem {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border-radius: 9px;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--text-2);
    font-size: 13.5px;
    font-weight: 600;
    text-align: left;
  }
  .rail .navitem svg { width: 18px; height: 18px; flex: none; }
  .rail .navitem:hover { background: var(--card-alt); color: var(--text-1); }
  .rail .navitem[aria-current="page"] {
    background: color-mix(in srgb, var(--accent, var(--brand)) calc(var(--tint-alpha) * 100%), transparent);
    color: var(--accent, var(--brand));
  }
  .rail .navitem[data-soon] { opacity: 0.4; cursor: default; }
  .rail .spacer { flex: 1; }

  .main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

  .content { max-width: 1080px; margin: 0 auto; padding: 28px 32px; }

  /* Desktop home: hero + 3-col tiles */
  .hero {
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 22px;
    background: var(--card);
  }
  .hero .hero-inner { padding: 30px 28px 24px; }
  .hero h1 { font-size: 30px; margin: 0 0 6px; letter-spacing: -0.01em; }
  .hero p { color: var(--text-2); margin: 0; max-width: 60ch; }
  .tilegrid { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .tile { padding: 18px; }

  .fieldrow { grid-template-columns: repeat(4, 1fr); }
  .fieldrow .half { grid-column: span 2; }

  .topbar { padding: 18px 32px 0; }

  /* Module views: two-column masonry so the settings chain reads down the
     left and results sit alongside — the "even better on desktop" layout */
  .modcols { columns: 2; column-gap: 16px; }
  .modcols .card { break-inside: avoid; margin-bottom: 16px; }
}

/* Phone-width tightening */
@media (max-width: 420px) {
  .fieldrow { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}
