/* ============================================================
   SplitSnap — page tokens and components
   ============================================================ */

:root {
  color-scheme: dark;

  --bg: #06080A;
  --bg-alt: #090C0F;
  --surface: #0F1418;
  --surface-2: #151B21;
  --border: #1B2229;
  --border-strong: #2A343D;

  --text: #F3F7F6;
  --text-secondary: #9BAAB3;
  --text-tertiary: #6B7A84;

  /* Accent — mint, the "settled up" green */
  --accent: #3DD68C;
  --accent-hover: #63E3A5;
  --accent-press: #23B872;
  --accent-ink: #042514;
  --accent-dim: rgba(61, 214, 140, 0.10);
  --accent-border: rgba(61, 214, 140, 0.34);
  --accent-gradient: linear-gradient(135deg, #7BE9B8 0%, #3DD68C 45%, #35C9D8 100%);

  /* Person hues for the split demo */
  --p1: #3DD68C;
  --p2: #4FA8E8;
  --p3: #C98BE0;
  --p4: #F0A93C;

  --warn: #F0A93C;

  --font-sans: system-ui, -apple-system, "Segoe UI", "Segoe UI Variable", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Cascadia Mono", "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;

  --fs-hero: clamp(2.5rem, 1.4rem + 4.8vw, 5rem);
  --fs-h2: clamp(1.75rem, 1.25rem + 2vw, 2.75rem);
  --fs-h3: clamp(1.05rem, 1rem + 0.4vw, 1.25rem);
  --fs-body: 1.0625rem;
  --fs-small: 0.9rem;
  --fs-micro: 0.75rem;

  --lh-tight: 1.08;
  --lh-body: 1.62;
  --ls-tight: -0.03em;
  --ls-wide: 0.07em;

  --s-1: 4px;  --s-2: 8px;   --s-3: 12px;  --s-4: 16px;  --s-5: 20px;
  --s-6: 24px; --s-8: 32px;  --s-10: 40px; --s-12: 48px; --s-16: 64px; --s-24: 96px;

  --maxw: 1180px;
  --maxw-wide: 1400px;
  --side-pad: clamp(20px, 4vw, 40px);
  --section-pad: clamp(64px, 8vw, 128px);
  --nav-h: 62px;

  --r-sm: 8px; --r-md: 12px; --r-lg: 16px; --r-pill: 999px;

  --shadow-card: 0 1px 0 rgba(255,255,255,0.02), 0 8px 24px rgba(0,0,0,0.4);
  --shadow-shot: 0 1px 0 rgba(255,255,255,0.03), 0 24px 70px rgba(0,0,0,0.55);

  --dur-fast: 120ms;
  --dur: 220ms;
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
}

/* ============================================================
   Hero
   ============================================================ */

.hero {
  position: relative;
  padding-block: clamp(56px, 8vw, 104px) clamp(64px, 9vw, 128px);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: -32%;
  left: 50%;
  width: min(1100px, 132%);
  aspect-ratio: 1.55;
  transform: translateX(-50%);
  background:
    radial-gradient(closest-side, rgba(61, 214, 140, 0.13), transparent 72%),
    radial-gradient(closest-side, rgba(53, 201, 216, 0.08), transparent 78%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: var(--s-16);
  align-items: center;
}

.hero h1 {
  font-size: var(--fs-hero);
  font-weight: 650;
  margin-block: var(--s-5) var(--s-5);
}
.hero .lead { max-width: 46ch; margin-bottom: var(--s-6); }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-5);
  margin-top: var(--s-8);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.hero-meta span { display: inline-flex; align-items: center; gap: var(--s-2); }
.hero-meta span::before {
  content: "";
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--accent);
}

/* ---------- Phone mockup ---------- */

.phone-scene {
  perspective: 1300px;
  display: grid;
  place-items: center;
}

.phone {
  position: relative;
  width: min(300px, 78vw);
  aspect-ratio: 300 / 610;
  border-radius: 42px;
  padding: 11px;
  background: linear-gradient(155deg, #232B33, #0D1216 60%);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-shot);
  transform-style: preserve-3d;
  transition: transform 80ms linear;
}

.phone::after {
  content: "";
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 84px;
  height: 20px;
  border-radius: var(--r-pill);
  background: #05070A;
  z-index: 3;
}

.phone-screen {
  position: relative;
  height: 100%;
  border-radius: 32px;
  background: var(--bg-alt);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.phone-top {
  padding: 42px var(--s-4) var(--s-3);
  border-bottom: 1px solid var(--border);
}
.phone-title {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.phone-sub {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-top: 3px;
}

/* Receipt being scanned */
.scan {
  position: relative;
  margin: var(--s-4);
  padding: var(--s-3);
  border-radius: var(--r-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
}

.scan-row {
  display: flex;
  justify-content: space-between;
  gap: var(--s-3);
  font-size: 0.66rem;
  padding: 3.5px 0;
  color: var(--text-secondary);
  opacity: 0.35;
  transition: opacity 300ms var(--ease), color 300ms var(--ease);
}
.scan-row.found { opacity: 1; color: var(--text); }
.scan-row .amt { font-family: var(--font-mono); }
.scan-row.total-row {
  border-top: 1px dashed var(--border-strong);
  margin-top: var(--s-2);
  padding-top: var(--s-2);
  font-weight: 600;
}

/* The sweeping scan line */
.scan-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 18px 3px rgba(61, 214, 140, 0.55);
  opacity: 0;
}
.scan.scanning .scan-line {
  opacity: 1;
  animation: sweep 2.4s cubic-bezier(0.4, 0, 0.3, 1) infinite;
}
@keyframes sweep {
  0%   { top: 0%; opacity: 0; }
  8%   { opacity: 1; }
  92%  { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

/* People chips inside the phone */
.phone-people {
  display: flex;
  gap: 6px;
  padding: 0 var(--s-4);
  flex-wrap: wrap;
}
.pchip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border-radius: var(--r-pill);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.62rem;
  color: var(--text-secondary);
}
.pchip .av {
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--c, var(--accent));
  color: #04120A;
  font-size: 0.46rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}

/* Totals footer in the phone */
.phone-foot {
  margin-top: auto;
  padding: var(--s-4);
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.phone-foot-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.72rem;
  padding: 3px 0;
  color: var(--text-secondary);
}
.phone-foot-row .who { display: inline-flex; align-items: center; gap: 6px; }
.phone-foot-row .swatch { width: 8px; height: 8px; border-radius: 2px; background: var(--c); }
.phone-foot-row .amt { font-family: var(--font-mono); color: var(--text); font-weight: 600; }

/* ============================================================
   Interactive split demo
   ============================================================ */

.demo {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: var(--s-8);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  padding: var(--s-8);
  box-shadow: var(--shadow-card);
}

.demo-panel-title {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--s-4);
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--border);
}

/* Item rows */
.demo-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--s-3);
  align-items: center;
  padding: var(--s-3) 0;
  border-bottom: 1px solid var(--border);
}
.demo-item:last-of-type { border-bottom: 0; }

.demo-item-name { font-size: 0.94rem; }
.demo-item-price {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text);
}

.assign {
  grid-column: 1 / -1;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.who-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px 4px 5px;
  border-radius: var(--r-pill);
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-tertiary);
  font-family: inherit;
  font-size: 0.76rem;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease),
              background var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease);
}
.who-btn .av {
  width: 17px; height: 17px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.58rem;
  font-weight: 700;
  background: var(--border-strong);
  color: var(--text-tertiary);
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.who-btn:hover { border-color: var(--text-tertiary); color: var(--text-secondary); }
.who-btn[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--c) 55%, transparent);
  background: color-mix(in srgb, var(--c) 13%, transparent);
  color: var(--text);
}
.who-btn[aria-pressed="true"] .av { background: var(--c); color: #04120A; }

/* Tax / tip controls */
.demo-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-5);
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid var(--border);
}
.ctrl label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--s-3);
}
.ctrl label .val { color: var(--accent); }
.ctrl input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}

/* Results */
.result-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--s-3);
  align-items: center;
  padding: var(--s-3) 0;
  border-bottom: 1px solid var(--border);
}
.result-row .av {
  width: 26px; height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--c);
  color: #04120A;
  font-size: 0.72rem;
  font-weight: 700;
}
.result-name { font-size: 0.92rem; }
.result-break {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--text-tertiary);
  margin-top: 2px;
}
.result-total {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.result-sum {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: var(--s-5);
  padding-top: var(--s-4);
  border-top: 1px solid var(--border-strong);
}
.result-sum .lbl {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.result-sum .amt {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 650;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.reconcile {
  margin-top: var(--s-4);
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  gap: var(--s-2);
  color: var(--accent);
}
.reconcile.note { color: var(--text-tertiary); }
.reconcile.bad { color: var(--warn); }
.reconcile svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2.2; flex: none; }

.demo-warn {
  margin-top: var(--s-4);
  padding: var(--s-3) var(--s-4);
  border-radius: var(--r-sm);
  border: 1px solid color-mix(in srgb, var(--warn) 34%, transparent);
  background: color-mix(in srgb, var(--warn) 10%, transparent);
  color: var(--warn);
  font-size: 0.8rem;
}
.demo-warn[hidden] { display: none; }

/* ============================================================
   Privacy strip
   ============================================================ */

.privacy-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-6);
  text-align: center;
}
.privacy-item .big {
  display: block;
  font-size: clamp(1.8rem, 1.3rem + 2vw, 2.8rem);
  font-weight: 650;
  letter-spacing: -0.04em;
  color: var(--accent);
  line-height: 1;
  margin-bottom: var(--s-3);
  font-variant-numeric: tabular-nums;
}
.privacy-item p { color: var(--text-secondary); font-size: var(--fs-small); }

/* ============================================================
   Step visuals
   ============================================================ */

.mini {
  padding: var(--s-5);
  display: grid;
  gap: var(--s-3);
}
.mini-row {
  display: flex;
  justify-content: space-between;
  gap: var(--s-4);
  font-size: 0.85rem;
  padding: var(--s-3) var(--s-4);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.mini-row .amt { font-family: var(--font-mono); color: var(--text-secondary); }
.mini-row.accent-row {
  border-color: var(--accent-border);
  background: var(--accent-dim);
}
.mini-row.accent-row .amt { color: var(--accent); }

.share-card {
  padding: var(--s-6);
  border-radius: var(--r-md);
  background: linear-gradient(150deg, rgba(61,214,140,0.16), rgba(53,201,216,0.07) 60%, transparent);
  border: 1px solid var(--accent-border);
  text-align: center;
}
.share-card .st {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--accent);
}
.share-card .amt {
  font-size: 2.2rem;
  font-weight: 650;
  letter-spacing: -0.04em;
  margin: var(--s-3) 0 var(--s-2);
  font-variant-numeric: tabular-nums;
}
.share-card .sub { color: var(--text-secondary); font-size: var(--fs-small); }

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: var(--s-12); }
  .demo { grid-template-columns: 1fr; gap: var(--s-10); }
}

@media (max-width: 720px) {
  .privacy-row { grid-template-columns: 1fr; }
  .demo { padding: var(--s-5); }
  .demo-controls { grid-template-columns: 1fr; gap: var(--s-4); }
}