/* ─────────────────────────────────────────────────────────────────────────
   «Покупалочка» — marketing site stylesheet.
   Single file, no build step. Design tokens transcribed from
   src/fe/designsystem/tokens.json (Variant 1 — Quiet Editorial).
   ───────────────────────────────────────────────────────────────────────── */

:root {
  /* color — light (tokens.json color.*.light) */
  --surface:         #FAF7F2;
  --surface-variant: #EFEAE0;
  --ink:             #1A1611;
  --ink-muted:       #5C5852;
  --primary:         #2C5F3D;
  --on-primary:      #FFFFFF;
  --outline:         #C8C2B7;
  --error:           #9B2C2C;
  --delta-down:      #1B5E20;

  /* spacing scale (tokens.json spacing) */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  32px;
  --space-xxl: 48px;

  /* radii (tokens.json radius) */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* motion (tokens.json motion) */
  --dur-fast: 150ms;
  --dur-med:  250ms;
  --dur-slow: 400ms;
  --ease-standard: cubic-bezier(0.2, 0.0, 0.0, 1.0);

  /* type families (tokens.json type.family) */
  --font-display: Georgia, "Times New Roman", "PT Serif", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;

  --measure: 960px;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* color — dark (tokens.json color.*.dark) */
    --surface:         #0F0D0A;
    --surface-variant: #1C1916;
    --ink:             #F0EDE7;
    --ink-muted:       #A8A4A0;
    --primary:         #A8D5A0;
    --on-primary:      #0F2515;
    --outline:         #3A3631;
    --error:           #F2B8B5;
    --delta-down:      #A5D6A7;
  }
}

/* ── reset / base ────────────────────────────────────────────────────────── */

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;          /* bodyMd */
  line-height: 24px;
  letter-spacing: 0.15px;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--primary); }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
  margin: 0;
}

p { margin: 0; }

/* visually-hidden but available to screen readers and crawlers (e.g. the hero
   <h1>, whose visible counterpart is the decorative rotating headline). */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ── layout primitives ───────────────────────────────────────────────────── */

.container {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section { padding: var(--space-xxl) 0; }
.section + .section { border-top: 1px solid var(--outline); }

.section-title {
  font-size: 28px;          /* displayMd */
  line-height: 36px;
  letter-spacing: -0.3px;
  margin-bottom: var(--space-sm);
}

.section-lead {
  font-size: 18px;          /* bodyLg */
  line-height: 26px;
  color: var(--ink-muted);
  max-width: 38em;
  margin-bottom: var(--space-xl);
}

.eyebrow {
  font-size: 13px;          /* labelMd */
  line-height: 18px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--space-sm);
}

/* ── header ──────────────────────────────────────────────────────────────── */

.site-header {
  border-bottom: 1px solid var(--outline);
}
.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm) var(--space-md);
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--ink);
}
.brand img {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
}
.brand span {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;          /* titleMd */
}
.site-nav {
  display: flex;
  gap: var(--space-lg);
  font-size: 14px;          /* labelLg */
  font-weight: 500;
}
.site-nav a { color: var(--ink-muted); text-decoration: none; }
.site-nav a:hover { color: var(--primary); }

/* ── hero ────────────────────────────────────────────────────────────────── */

.hero .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: center;
  padding-top: var(--space-xxl);
  padding-bottom: var(--space-xxl);
}

/* rotating headline — all four stacked in one grid cell so the box height
   is the tallest line and never jumps. */
.hero-headline {
  display: grid;
  /* visual matches a display heading — the element is a <p>, not an <h1>
     (the real <h1> is the sr-only line above it), so set these explicitly
     rather than inheriting from the h1,h2,h3 rule. */
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
  font-size: 32px;          /* displayLg */
  line-height: 40px;
  letter-spacing: -0.5px;
  margin: 0 0 var(--space-md);
}
.hero-headline span {
  grid-area: 1 / 1;
  opacity: 0;
  animation: headline-cycle 20s var(--ease-standard) infinite;
}
.hero-headline span:nth-child(1) { animation-delay: 0s; }
.hero-headline span:nth-child(2) { animation-delay: 5s; }
.hero-headline span:nth-child(3) { animation-delay: 10s; }
.hero-headline span:nth-child(4) { animation-delay: 15s; }

@keyframes headline-cycle {
  0%   { opacity: 0; }
  2%   { opacity: 1; }
  23%  { opacity: 1; }
  25%  { opacity: 0; }
  100% { opacity: 0; }
}

.hero-sub {
  font-size: 18px;          /* bodyLg */
  line-height: 26px;
  color: var(--ink-muted);
  max-width: 34em;
  margin-bottom: var(--space-lg);
}

.hero-art { max-width: 420px; }

/* ── buttons / RuStore badge ─────────────────────────────────────────────── */

.rustore-badge {
  display: inline-block;
  line-height: 0;
  border-radius: var(--radius-sm);
}
.rustore-badge img { height: 48px; width: auto; }
.badge-on-dark { display: none; }
@media (prefers-color-scheme: dark) {
  .badge-on-light { display: none; }
  .badge-on-dark  { display: block; }
}

/* ── steps («Как это работает») ──────────────────────────────────────────── */

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}
.step { display: flex; flex-direction: column; }
.step-art { max-width: 200px; margin-bottom: var(--space-md); }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1.5px solid var(--primary);
  border-radius: 999px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}
.step h3 {
  font-size: 18px;          /* titleMd */
  line-height: 24px;
  margin-bottom: var(--space-xs);
}
.step p { color: var(--ink-muted); }

/* ── cards («Три способа добавить») ──────────────────────────────────────── */

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}
.card {
  border: 1px solid var(--outline);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}
.card-art { max-width: 180px; margin-bottom: var(--space-md); }
.card h3 {
  font-size: 18px;          /* titleMd */
  line-height: 24px;
  margin-bottom: var(--space-xs);
}
.card p { color: var(--ink-muted); }

/* ── pillars («Что вы получаете») ────────────────────────────────────────── */

.pillars {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}
.pillar {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: var(--space-md);
  align-items: start;
}
.pillar-icon { width: 40px; height: 40px; }
.pillar h3 {
  font-size: 18px;          /* titleMd */
  line-height: 24px;
  margin-bottom: var(--space-xs);
}
.pillar p { color: var(--ink-muted); }

/* ── callout («Настоящая скидка») ────────────────────────────────────────── */

.callout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: center;
  background: var(--surface-variant);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-top: var(--space-xl);
}
.callout-art { max-width: 320px; }
.callout h3 {
  font-size: 22px;          /* headlineMd */
  line-height: 28px;
  margin-bottom: var(--space-sm);
}
.callout p { color: var(--ink-muted); }

/* ── universal strip / privacy ───────────────────────────────────────────── */

.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: center;
}
.split-art { max-width: 360px; }

/* ── gallery ─────────────────────────────────────────────────────────────── */

.gallery {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 220px;
  gap: var(--space-lg);
  overflow-x: auto;
  padding-bottom: var(--space-md);
  scroll-snap-type: x mandatory;
}
.shot {
  margin: 0;
  scroll-snap-align: start;
}
.shot a { display: block; }
.shot img {
  width: 100%;
  height: auto;
  border: 1px solid var(--outline);
  border-radius: var(--radius-lg);
}
.shot figcaption {
  margin-top: var(--space-sm);
  font-size: 14px;          /* bodySm */
  line-height: 20px;
  color: var(--ink-muted);
}

/* CSS-only lightbox — no JavaScript, opened via :target */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  background: rgba(15, 13, 10, 0.88);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-med) var(--ease-standard);
}
.lightbox:target { opacity: 1; pointer-events: auto; }
.lightbox-backdrop { position: absolute; inset: 0; }
.lightbox img {
  position: relative;
  max-height: 90vh;
  max-width: 92vw;
  width: auto;
  border-radius: var(--radius-lg);
}
.lightbox-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  line-height: 1;
  color: var(--surface);
  text-decoration: none;
  border: 1px solid rgba(250, 247, 242, 0.5);
  border-radius: 999px;
}

/* ── download / support ──────────────────────────────────────────────────── */

.band {
  text-align: center;
}
.band .section-title { margin-bottom: var(--space-lg); }
.support-mail {
  font-family: var(--font-display);
  font-size: 22px;          /* headlineMd */
  font-weight: 600;
}

/* ── footer ──────────────────────────────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--outline);
  padding: var(--space-xl) 0;
  font-size: 14px;          /* bodySm */
  line-height: 20px;
  color: var(--ink-muted);
}
.site-footer .disclaimer { max-width: 52em; margin-bottom: var(--space-md); }
.site-footer .foot-links { display: flex; gap: var(--space-lg); flex-wrap: wrap; }
.site-footer a { color: var(--ink-muted); }

/* ── illustrations — colour comes from CSS custom properties so SVGs flip
   with the theme. Geometry/stroke-width stay as SVG attributes.  ─────────── */

svg.ill { width: 100%; height: auto; }
svg.ill .stroke {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;   /* stroke-width stays in CSS px at any size */
}
svg.ill .c-primary { stroke: var(--primary); }
svg.ill .c-outline { stroke: var(--outline); }
svg.ill .c-muted   { stroke: var(--ink-muted); }
svg.ill .c-surface { stroke: var(--surface); }
svg.ill .fill-primary  { fill: var(--primary); }
svg.ill .fill-surface  { fill: var(--surface); }
svg.ill .fill-variant  { fill: var(--surface-variant); }
svg.ill .fill-muted    { fill: var(--ink-muted); }
svg.ill .dim { opacity: 0.5; }

/* ── privacy-policy page ─────────────────────────────────────────────────── */

.legal { padding: var(--space-xxl) 0; }
.legal h1 {
  font-size: 32px;          /* displayLg */
  line-height: 40px;
  letter-spacing: -0.5px;
  margin-bottom: var(--space-md);
}
.legal h2 {
  font-size: 22px;          /* headlineMd */
  line-height: 28px;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}
.legal p { margin-bottom: var(--space-md); max-width: 42em; }
.legal ul { max-width: 42em; padding-left: var(--space-lg); }
.legal li { margin-bottom: var(--space-xs); }
.legal .meta { color: var(--ink-muted); font-size: 14px; }
.todo {
  background: var(--surface-variant);
  border: 1px dashed var(--error);
  border-radius: var(--radius-sm);
  padding: 0 var(--space-xs);
  color: var(--error);
  font-family: var(--font-body);
  font-size: 0.9em;
}

/* ── blog ────────────────────────────────────────────────────────────────── */

/* index post cards reuse .card; the title is a link — keep it ink, not the
   default link green, so a card reads as a heading. */
.post-card h3 a { color: var(--ink); text-decoration: none; }
.post-card h3 a:hover { color: var(--primary); }

/* ── responsive ──────────────────────────────────────────────────────────── */

@media (min-width: 720px) {
  .hero .container { grid-template-columns: 1.1fr 0.9fr; }
  .hero-headline { font-size: 36px; line-height: 44px; }
  .steps   { grid-template-columns: repeat(3, 1fr); }
  .cards   { grid-template-columns: repeat(3, 1fr); }
  .pillars { grid-template-columns: repeat(2, 1fr); gap: var(--space-xl); }
  .callout { grid-template-columns: 320px 1fr; }
  .split   { grid-template-columns: 1fr 1fr; }
  .split.reverse .split-art { order: 2; }
}

/* ── motion preferences ──────────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .hero-headline span { animation: none; opacity: 0; }
  .hero-headline span:nth-child(1) { opacity: 1; }
  .lightbox { transition: none; }
  * { scroll-behavior: auto; }
}