/* DzenQ landing. "Paper & ink" from the app (ui/theme/Theme.kt), the «Слива»
   logo colours (gold + sea) as the only bright notes. One idea per screen:
   big type, a lot of air, no cards-for-everything. */

:root {
  --bg: #F7F5F1;
  --surface: #FFFFFF;
  --letter: #FBF8F2;
  --ink: #191714;
  --ink-2: #5F5951;
  --ink-3: #8A847B;
  --line: #E6E1D9;
  --chip: #EDE9E2;
  --accent: #7A2E3F;
  --wax: #8B2635;
  --wax-dark: #5E1622;
  --sea: #2FA796;
  --sea-bg: #E3F1EE;
  --gold-bg: #F6ECD9;
  --stamp-frame: #1F8676;
  --stamp-paper: #FFFCF5;
  --envelope: #F1E8D8;
  --wash-gold: rgba(255, 207, 122, .55);
  --wash-sea: rgba(134, 225, 208, .45);
  --serif: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --sans: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
/* Dark only when chosen with the moon button (html[data-theme="dark"]). */
:root[data-theme="dark"] {
    --bg: #121110;
    --surface: #1B1A18;
    --letter: #201E1B;
    --ink: #EDEAE4;
    --ink-2: #A39D94;
    --ink-3: #8A847C;
    --line: #2A2825;
    --chip: #24221F;
    --accent: #D9899A;
    --sea: #6FD2C1;
    --sea-bg: #17302C;
    --gold-bg: #2C2417;
    --stamp-paper: #EFEBE2;
    --envelope: #2A2622;
    --wash-gold: rgba(246, 168, 92, .16);
    --wash-sea: rgba(76, 195, 178, .14);
    color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 18px; line-height: 1.6; overflow-x: hidden; }
p { margin: 0; }
h1, h2, h3 { margin: 0; font-weight: 600; }
a { color: inherit; }
svg { display: block; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }
@media (max-width: 600px) { .wrap { padding: 0 20px; } body { font-size: 17px; } }

.h2 { font-family: var(--serif); font-weight: 600; font-size: clamp(38px, 5.4vw, 64px); line-height: 1.04; letter-spacing: -.012em; }
.lead { font-size: clamp(19px, 1.6vw, 22px); color: var(--ink-2); line-height: 1.55; }
.fine { font-size: 15px; color: var(--ink-3); }

/* Nav */
.nav { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.nav .wrap { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand svg { width: 32px; height: 28px; }
.brand b { font-family: var(--serif); font-size: 26px; font-weight: 600; }
.brand b span { color: var(--sea); }
.nav .lang { margin-left: auto; font-size: 14px; color: var(--ink-3); display: flex; gap: 6px; }
.lang a { text-decoration: none; }
.lang a:hover { color: var(--ink); }
.lang .on { color: var(--ink); font-weight: 600; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; font: inherit; font-weight: 600; font-size: 17px; padding: 15px 28px; border-radius: 999px; background: var(--ink); color: var(--bg); text-decoration: none; transition: transform .15s ease; }
.btn:hover { transform: translateY(-1px); }
.btn.small { font-size: 14px; padding: 9px 18px; }
.btn.ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }
.more { font-weight: 600; text-decoration: none; display: inline-flex; gap: 6px; }
.more::after { content: "→"; transition: transform .15s ease; }
.more:hover::after { transform: translateX(3px); }

/* Hero */
.hero { position: relative; isolation: isolate; overflow: hidden; padding: 64px 0 120px; }
.hero::before, .hero::after { content: ""; position: absolute; z-index: -1; border-radius: 50%; filter: blur(80px); pointer-events: none; }
.hero::before { width: 560px; height: 560px; right: -140px; top: -160px; background: var(--wash-gold); }
.hero::after { width: 480px; height: 480px; right: 26%; bottom: -300px; background: var(--wash-sea); }
.hero .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hero h1 { font-family: var(--serif); font-weight: 600; font-size: clamp(56px, 8.4vw, 104px); line-height: .94; letter-spacing: -.02em; }
.hero h1 em { color: var(--accent); }
.hero .lead { margin: 28px 0 36px; max-width: 30em; }
.hero .actions { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.hero .fine { margin-top: 18px; }
@media (max-width: 900px) { .hero { padding: 32px 0 88px; } .hero .wrap { grid-template-columns: 1fr; gap: 56px; } }

/* The letter */
.scene { position: relative; padding: 24px 6px 44px; max-width: 520px; justify-self: center; width: 100%; }
.envelope { position: absolute; left: 3%; right: 3%; bottom: 0; height: 56%; background: var(--envelope); border-radius: 18px; }
.envelope::before { content: ""; position: absolute; inset: 0; border-radius: 18px; background:
  linear-gradient(to top right, transparent 49.6%, color-mix(in srgb, var(--ink) 8%, transparent) 50%, transparent 50.4%) left bottom / 50% 100% no-repeat,
  linear-gradient(to top left, transparent 49.6%, color-mix(in srgb, var(--ink) 8%, transparent) 50%, transparent 50.4%) right bottom / 50% 100% no-repeat; }
.letter { position: relative; z-index: 1; background: var(--letter); border-radius: 6px; padding: 36px 34px 32px; margin: 0 8% 0 3%; transform: rotate(-2deg); box-shadow: 0 0 0 1px var(--line), 0 28px 50px -30px rgba(25, 23, 20, .4); }
.letter .to { font-family: var(--serif); font-size: 32px; font-weight: 600; margin-bottom: 10px; }
.letter .msg { font-family: var(--serif); font-size: 23px; line-height: 1.4; max-width: 15em; }
.letter .sig { margin-top: 22px; font-size: 14px; color: var(--ink-2); display: flex; align-items: center; gap: 8px; }
.letter .sig::before { content: ""; width: 18px; height: 1px; background: var(--ink-3); }
.letter .stamp { position: absolute; top: -22px; right: -18px; transform: rotate(6deg); }
.seal { position: absolute; z-index: 2; right: 13%; bottom: 8px; width: 76px; height: 76px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #B0414F, var(--wax) 55%, var(--wax-dark)); display: flex; align-items: center; justify-content: center; box-shadow: 0 6px 16px -6px rgba(94, 22, 34, .7); }
.seal::after { content: ""; position: absolute; inset: 9px; border-radius: 50%; border: 1.5px solid rgba(255, 236, 220, .25); }
.seal svg { width: 34px; opacity: .55; }

/* Stamp: perforation = holes on a 12px grid, only in the padding band. */
.stamp { width: 84px; height: 96px; padding: 6px; background: var(--stamp-paper);
  -webkit-mask: linear-gradient(#000 0 0) content-box, radial-gradient(circle 3.6px at 0 0, #0000 97%, #000) 0 0 / 12px 12px;
  mask: linear-gradient(#000 0 0) content-box, radial-gradient(circle 3.6px at 0 0, #0000 97%, #000) 0 0 / 12px 12px;
  filter: drop-shadow(0 2px 3px rgba(25, 23, 20, .18)); }
.stamp i { display: flex; flex-direction: column; align-items: center; justify-content: center; width: 100%; height: 100%; border: 1.5px solid var(--stamp-frame); font-style: normal; font-size: 30px; line-height: 1; color: var(--stamp-frame); }
.stamp i small { font-family: var(--sans); font-size: 10px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; margin-top: 8px; }

/* Sections */
section { padding: 128px 0; }
section.tint { background: var(--surface); }
@media (max-width: 700px) { section { padding: 88px 0; } }

/* The story: short lines, one after another */
.story .scenes { font-family: var(--serif); font-size: clamp(28px, 3.6vw, 44px); line-height: 1.22; }
.story .scenes p { color: var(--ink-3); }
.story .scenes p + p { margin-top: 10px; }
.story .turn { margin-top: 48px; font-family: var(--serif); font-size: clamp(28px, 3.6vw, 44px); line-height: 1.22; }
.story .answer { margin-top: 48px; max-width: 34em; }

/* Split: text + a picture */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.split .lead { margin-top: 24px; }
.split .fine { margin-top: 20px; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 56px; } }

/* Phone mock */
.phone { width: min(320px, 100%); margin: 0 auto; background: var(--bg); border-radius: 38px; padding: 22px 18px 24px; display: flex; flex-direction: column; gap: 12px; box-shadow: 0 0 0 1px var(--line), 0 40px 70px -46px rgba(25, 23, 20, .5); }
.phone .bar { width: 90px; height: 5px; border-radius: 3px; background: var(--line); margin: 0 auto 8px; }
.banner { background: var(--gold-bg); border-radius: 18px; padding: 16px; font-size: 15px; color: var(--ink-2); }
.banner b { display: block; font-family: var(--serif); font-size: 25px; line-height: 1.15; color: var(--ink); margin-bottom: 2px; }
.thank { background: var(--surface); border-radius: 16px; padding: 14px 16px; box-shadow: 0 0 0 1px var(--line); display: flex; flex-direction: column; gap: 3px; }
.thank .who { font-size: 14px; font-weight: 600; }
.thank .what { font-family: var(--serif); font-size: 19px; line-height: 1.35; }
.thank .when { font-size: 13px; color: var(--ink-3); }
.pbtn { background: var(--ink); color: var(--bg); border-radius: 999px; text-align: center; padding: 13px; font-weight: 600; font-size: 15px; margin-top: 4px; }
.access .row { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.access .name { font-weight: 600; font-size: 16px; }
.access .tag { font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; background: var(--sea-bg); color: var(--sea); white-space: nowrap; }
.access .tag.wait { background: var(--chip); color: var(--ink-2); }
.meter { height: 6px; border-radius: 3px; background: var(--chip); overflow: hidden; margin: 8px 0 6px; }
.meter i { display: block; height: 100%; background: var(--sea); border-radius: 3px; }
.access p { font-size: 14px; color: var(--ink-2); }

/* How: three words */
.how .steps { margin-top: 64px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; counter-reset: s; }
.how .step { border-top: 1px solid var(--line); padding-top: 24px; }
.how .step::before { counter-increment: s; content: counter(s); display: block; font-family: var(--serif); font-size: 22px; color: var(--ink-3); margin-bottom: 10px; }
.how .step h3 { font-family: var(--serif); font-size: 34px; line-height: 1.1; }
.how .step p { margin-top: 10px; color: var(--ink-2); font-size: 17px; }
.how .stampnote { margin-top: 56px; display: flex; gap: 20px; align-items: center; color: var(--ink-2); max-width: 640px; }
.how .stampnote .stamp { flex: none; width: 60px; height: 72px; padding: 5px; --stamp-frame: #8B2635; }
.how .stampnote .stamp i { font-size: 22px; }
@media (max-width: 800px) { .how .steps { grid-template-columns: 1fr; gap: 28px; } }

/* Trust: three promises */
.trust .promises { margin-top: 64px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; }
.trust h3 { font-family: var(--serif); font-size: 30px; line-height: 1.1; }
.trust .promises p { margin-top: 12px; color: var(--ink-2); font-size: 17px; }
.trust details { margin-top: 56px; max-width: 760px; }
.trust summary { cursor: pointer; font-weight: 600; list-style: none; display: inline-flex; gap: 8px; }
.trust summary::-webkit-details-marker { display: none; }
.trust summary::after { content: "+"; color: var(--ink-3); }
.trust details[open] summary::after { content: "−"; }
.trust details p { margin-top: 16px; color: var(--ink-2); font-size: 16px; }
@media (max-width: 800px) { .trust .promises { grid-template-columns: 1fr; gap: 36px; } }

/* Start: where to find everything */
.start { text-align: center; }
.start .h2 { max-width: 14em; margin: 0 auto; }
.start .lead { margin: 20px auto 0; max-width: 32em; }
.start .actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-top: 40px; }
.start .fine { margin-top: 16px; }
.hub { margin: 96px auto 0; max-width: 860px; display: grid; grid-template-columns: 1fr 1fr; gap: 0 56px; text-align: left; }
.hub h3 { font-size: 14px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); padding-bottom: 12px; }
.hub ul { list-style: none; margin: 0; padding: 0; }
.hub li a { display: flex; align-items: baseline; gap: 12px; padding: 16px 0; border-top: 1px solid var(--line); text-decoration: none; }
.hub li a span { color: var(--ink-3); font-size: 15px; margin-left: auto; text-align: right; }
.hub li a::after { content: "→"; color: var(--ink-3); }
.hub li a:hover, .hub li a:hover::after { color: var(--accent); }
@media (max-width: 720px) { .hub { grid-template-columns: 1fr; gap: 40px; margin-top: 72px; } }

/* Footer */
footer { padding: 48px 0 64px; border-top: 1px solid var(--line); }
footer .wrap { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; font-size: 15px; color: var(--ink-3); }
footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
footer a { text-decoration: none; }
footer a:hover { color: var(--ink); }
.credo { font-family: var(--serif); font-style: italic; font-size: 20px; color: var(--ink-2); }

/* Motion */
html.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
html.js .reveal.in { opacity: 1; transform: none; }
@keyframes press { 0% { transform: scale(1.5) rotate(-20deg); opacity: 0; } 60% { transform: scale(.94) rotate(4deg); opacity: 1; } 100% { transform: none; } }
@keyframes stick { 0% { transform: translate(18px, -18px) rotate(18deg); opacity: 0; } 100% { transform: rotate(6deg); opacity: 1; } }
@media (prefers-reduced-motion: no-preference) {
  .scene .seal { animation: press .7s .5s cubic-bezier(.2, .8, .2, 1) both; }
  .scene .stamp { animation: stick .6s 1.1s cubic-bezier(.2, .8, .2, 1) both; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js .reveal { opacity: 1; transform: none; transition: none; }
}

/* Moon / sun button */
.theme { width: 36px; height: 36px; border-radius: 50%; border: 0; background: transparent; color: var(--ink-2); display: inline-flex; align-items: center; justify-content: center; cursor: pointer; flex: none; }
@media (hover: hover) { .theme:hover { background: var(--chip); color: var(--ink); } }
.theme svg { width: 18px; height: 18px; }
.theme .sun { display: none; }
:root[data-theme="dark"] .theme .sun { display: block; }
:root[data-theme="dark"] .theme .moon { display: none; }
@media (max-width: 480px) { .nav .btn.small { display: none; } .nav .wrap { gap: 12px; } }