/* Tappd — Warm Analog marketing page
   Mirrors the iOS design system tokens (warm paper, mono accents, hairline
   rules, tabular numbers). Light-first; Apple-clean structure with Oryzo-style
   sectional color atmosphere translated to Warm Analog (ivory -> kraft -> sage
   -> clay -> dim kraft). No third-party runtime dependencies. */

/* ---- Fonts (self-hosted OFL: IBM Plex Mono/Sans, Fraunces) ---- */
@font-face {
  font-family: "Plex Mono";
  src: url("fonts/plex-mono-400.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("fonts/plex-mono-600.woff2") format("woff2");
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("fonts/plex-mono-700.woff2") format("woff2");
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Plex Sans";
  src: url("fonts/plex-sans-var.woff2") format("woff2");
  font-weight: 100 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: Fraunces;
  src: url("fonts/fraunces-var.woff2") format("woff2");
  font-weight: 300 700; font-style: normal; font-display: swap;
}

/* ---- Tokens ---- */
:root {
  --canvas: #f4efe4;
  --surface: #fbf8f1;
  --surface-sunken: #eee7d8;
  --ink: #2a2622;
  --ink-muted: #6b635a;
  --hairline: #e3daca;
  --accent: #8c9a3e;        /* sage/soft-lime, AA on paper */
  --accent-deep: #6f7c2f;
  --accent-soft: #c7d08c;
  --secondary: #b06a4b;     /* muted clay */
  --tan: #d8c4a0;

  /* Sectional atmospheres (the scroll color story) */
  --sec-ivory: #f7f3ea;
  --sec-kraft: #ece3d2;
  --sec-sage: #e7ecd6;
  --sec-clay: #f1e3d8;
  --sec-board: #1e1a16;     /* dim kraft footer (Solari board) */
  --board-ink: #ede4d3;

  --mono: "Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --sans: "Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --serif: Fraunces, Georgia, "Times New Roman", serif;

  --maxw: 1080px;
  --radius: 16px;
  --hair: 1px;
}

/* ---- Base ---- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--canvas);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
:focus-visible { outline: 2px solid var(--accent-deep); outline-offset: 3px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 0 0 14px;
}
.serif { font-family: var(--serif); font-weight: 480; letter-spacing: -0.01em; }
.tabular { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* ---- Nav ---- */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--canvas) 88%, transparent);
  backdrop-filter: saturate(120%) blur(10px);
  border-bottom: var(--hair) solid var(--hairline);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.nav-mark { font-family: var(--mono); font-weight: 600; font-size: 1.05rem; letter-spacing: 0.02em; text-decoration: none; }
.nav-links { display: flex; gap: 26px; align-items: center; }
.nav-links a { font-size: 0.92rem; text-decoration: none; color: var(--ink-muted); }
.nav-links a:hover { color: var(--ink); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-weight: 600; font-size: 0.95rem;
  padding: 12px 20px; border-radius: 10px; text-decoration: none;
  border: var(--hair) solid transparent; cursor: pointer; transition: transform .15s ease, opacity .15s ease;
}
.btn-primary { background: var(--accent); color: var(--surface); }
.btn-primary:hover { transform: translateY(-1px); opacity: .94; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--hairline); }
.btn-ghost:hover { background: var(--surface); }
@media (prefers-reduced-motion: reduce) { .btn:hover { transform: none; } }

/* ---- Sections ---- */
section { padding: 96px 0; }
.sec-ivory { background: var(--sec-ivory); }
.sec-kraft { background: var(--sec-kraft); }
.sec-sage { background: var(--sec-sage); }
.sec-clay { background: var(--sec-clay); }
.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head h2 { font-family: var(--serif); font-weight: 520; font-size: clamp(1.8rem, 3.6vw, 2.6rem); line-height: 1.12; margin: 0 0 12px; letter-spacing: -0.015em; }
.section-head p { font-size: 1.08rem; color: var(--ink-muted); margin: 0; }

/* ---- Hero ---- */
.hero { padding: 64px 0 92px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.hero h1 {
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(2.3rem, 5vw, 3.5rem); line-height: 1.06; letter-spacing: -0.02em;
  margin: 18px 0 18px;
}
.hero h1 em { font-style: italic; color: var(--secondary); }
.hero-sub { font-size: 1.18rem; color: var(--ink-muted); max-width: 30ch; margin: 0 0 30px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero-note { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.06em; color: var(--ink-muted); margin-top: 22px; }

/* Solari split-flap wordmark */
.flap-row { display: flex; gap: 6px; }
.flap {
  font-family: var(--mono); font-weight: 600;
  font-size: clamp(2.4rem, 6vw, 3.6rem); line-height: 1;
  color: var(--ink);
  background: color-mix(in srgb, var(--tan) 45%, var(--surface));
  border-radius: 10px;
  padding: 0.14em 0.16em 0.18em;
  position: relative;
  transform-origin: top center;
}
.flap::after { /* the split-flap seam */
  content: ""; position: absolute; left: 8%; right: 8%; top: 50%;
  height: 1px; background: color-mix(in srgb, var(--hairline) 70%, transparent);
}
.flap.animate { animation: flap-in .42s cubic-bezier(.2,.7,.3,1) both; }
@keyframes flap-in {
  0% { opacity: 0; transform: perspective(420px) rotateX(-88deg); }
  100% { opacity: 1; transform: perspective(420px) rotateX(0deg); }
}
@media (prefers-reduced-motion: reduce) {
  .flap.animate { animation: none; }
}

/* ---- Receipt mock (echoes the app) ---- */
.receipt {
  background: var(--surface);
  border: var(--hair) solid var(--hairline);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: 0 1px 0 var(--hairline);
  max-width: 360px; margin-left: auto;
}
.receipt .r-merchant { font-family: var(--serif); font-weight: 520; font-size: 1.25rem; }
.receipt .r-meta { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.04em; color: var(--ink-muted); text-transform: uppercase; margin-top: 2px; }
.receipt hr { border: none; border-top: var(--hair) dashed var(--hairline); margin: 16px 0; }
.r-line { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 0.95rem; padding: 5px 0; color: var(--ink-muted); font-variant-numeric: tabular-nums; }
.r-line.total { color: var(--ink); font-weight: 700; font-size: 1.15rem; border-top: var(--hair) solid var(--hairline); margin-top: 6px; padding-top: 12px; }
.r-chip { display: inline-block; font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-deep); background: color-mix(in srgb, var(--accent-soft) 50%, var(--surface)); border-radius: 999px; padding: 4px 10px; }

/* ---- Steps ---- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.step .num { font-family: var(--mono); font-weight: 700; font-size: 1rem; color: var(--accent-deep); letter-spacing: 0.1em; }
.step hr { border: none; border-top: var(--hair) solid var(--hairline); margin: 12px 0 14px; }
.step h3 { font-family: var(--serif); font-weight: 520; font-size: 1.3rem; margin: 0 0 8px; }
.step p { color: var(--ink-muted); margin: 0; }

/* ---- Feature grid ---- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature {
  background: var(--surface); border: var(--hair) solid var(--hairline);
  border-radius: var(--radius); padding: 24px;
}
.feature .ficon { font-family: var(--mono); font-weight: 700; color: var(--accent-deep); font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; }
.feature h3 { font-family: var(--sans); font-weight: 600; font-size: 1.12rem; margin: 12px 0 6px; }
.feature p { color: var(--ink-muted); margin: 0; font-size: 0.98rem; }

/* ---- Privacy list ---- */
.privacy-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 40px; margin-top: 8px; }
.privacy-item { display: flex; gap: 12px; padding: 14px 0; border-top: var(--hair) solid var(--hairline); }
.privacy-item .seal { font-family: var(--mono); color: var(--accent-deep); font-weight: 700; }
.privacy-item p { margin: 0; }
.privacy-item strong { font-weight: 600; }

/* ---- CTA band ---- */
.cta { background: var(--sec-board); color: var(--board-ink); text-align: center; padding: 88px 0; }
.cta h2 { font-family: var(--serif); font-weight: 500; font-size: clamp(1.9rem, 4vw, 2.8rem); margin: 0 0 14px; letter-spacing: -0.015em; }
.cta p { color: color-mix(in srgb, var(--board-ink) 75%, transparent); margin: 0 0 28px; }
.cta .btn-primary { background: var(--accent-soft); color: var(--sec-board); }

/* ---- Footer ---- */
.footer { background: var(--sec-board); color: color-mix(in srgb, var(--board-ink) 70%, transparent); padding: 40px 0 56px; border-top: 1px solid color-mix(in srgb, var(--board-ink) 16%, transparent); }
.footer .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: flex-start; }
.footer .mark { font-family: var(--mono); font-weight: 600; color: var(--board-ink); font-size: 1.05rem; }
.footer a { color: color-mix(in srgb, var(--board-ink) 78%, transparent); text-decoration: none; font-size: 0.9rem; }
.footer a:hover { color: var(--board-ink); }
.footer .cols { display: flex; gap: 56px; flex-wrap: wrap; }
.footer .col { display: flex; flex-direction: column; gap: 8px; }
.footer .legal { font-size: 0.76rem; margin-top: 22px; width: 100%; color: color-mix(in srgb, var(--board-ink) 55%, transparent); }

/* ---- Scroll reveal (progressive enhancement) ----
   Content is fully visible by default; only hidden once JS is confirmed
   present (the `.js` class) so no-JS/SEO/crawler renders show everything. */
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---- Responsive ---- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .receipt { margin: 0 auto; }
  .steps, .features, .privacy-list { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  section { padding: 72px 0; }
}