/* ============================================================
   Твой Санта — визуальная система
   Бумага и мандарин: холодный бумажный фон, чернильный текст,
   один тёплый акцент. Никаких ёлок, снежинок и красного.
   ============================================================ */

@font-face {
  font-family: "Unbounded";
  src: url("/static/fonts/unbounded-cyrillic.woff2") format("woff2");
  font-weight: 600; font-display: swap;
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
  font-family: "Unbounded";
  src: url("/static/fonts/unbounded-latin.woff2") format("woff2");
  font-weight: 600; font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+2000-206F, U+2122, U+2191, U+2193, U+2212;
}
@font-face {
  font-family: "Golos Text";
  src: url("/static/fonts/golos-cyrillic.woff2") format("woff2");
  font-weight: 400 600; font-display: swap;
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
  font-family: "Golos Text";
  src: url("/static/fonts/golos-latin.woff2") format("woff2");
  font-weight: 400 600; font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+2000-206F, U+2122, U+2191, U+2193, U+2212;
}

:root {
  --paper: #eff2f6;
  --surface: #ffffff;
  --ink: #10161f;
  --ink-soft: #566374;
  --frost: #d7dee8;
  --mandarin: #ee6a17;
  --mandarin-deep: #bc4e08;
  --ok-bg: #e8f1ea;
  --ok-line: #b4cfba;
  --err-bg: #fdeae2;
  --err-line: #f0bfa6;

  --font-display: "Unbounded", "Golos Text", system-ui, sans-serif;
  --font-body: "Golos Text", system-ui, -apple-system, "Segoe UI", sans-serif;

  --s1: 4px;  --s2: 8px;  --s3: 12px; --s4: 16px;
  --s5: 24px; --s6: 32px; --s7: 48px; --s8: 72px; --s9: 104px;

  --radius: 14px;
  --radius-sm: 9px;
  --page: 1060px;
  --shadow: 0 1px 2px rgba(16, 22, 31, .05), 0 8px 24px -12px rgba(16, 22, 31, .16);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0e131a;
    --surface: #161d27;
    --ink: #eef2f7;
    --ink-soft: #94a1b2;
    --frost: #26303d;
    --mandarin: #ff8438;
    --mandarin-deep: #ffa469;
    --ok-bg: #16241c;
    --ok-line: #2f4a37;
    --err-bg: #2a1a13;
    --err-line: #55311f;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px -12px rgba(0, 0, 0, .7);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "ss01";
}

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

h1 {
  font-size: clamp(2.05rem, 1.25rem + 3.4vw, 3.7rem);
  line-height: 1.04;
  letter-spacing: -.025em;
  margin: 0 0 var(--s4);
}
h2 {
  font-size: clamp(1.45rem, 1.1rem + 1.5vw, 2.1rem);
  line-height: 1.12;
  letter-spacing: -.02em;
  margin: 0 0 var(--s4);
}
h3 {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0;
  margin: 0 0 var(--s2);
}
p { margin: 0 0 var(--s3); }
a { color: var(--mandarin-deep); }

.eyebrow {
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 var(--s3);
}
.lead { font-size: 1.14rem; color: var(--ink-soft); max-width: 33em; }
.muted { color: var(--ink-soft); }
.note { font-size: .88rem; color: var(--ink-soft); }
.right { text-align: right; }

/* ---------------------------------------------------------- каркас */

.wrap { width: 100%; max-width: var(--page); margin: 0 auto; padding: 0 var(--s4); }

.topbar {
  border-bottom: 1px solid var(--frost);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 10;
}
.topbar__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s4); min-height: 60px;
}
.logo {
  font-family: var(--font-display);
  font-size: 1.02rem; letter-spacing: -.02em;
  color: var(--ink); text-decoration: none;
}
.logo::after {
  content: ""; display: inline-block;
  width: 7px; height: 7px; margin-left: 7px; border-radius: 50%;
  background: var(--mandarin); vertical-align: 2px;
}
.topnav { display: flex; align-items: center; gap: var(--s5); font-size: .94rem; }
.topnav a { color: var(--ink-soft); text-decoration: none; }
.topnav a:hover { color: var(--ink); }

main { display: block; }
.section { padding: var(--s8) 0; }
.section--tight { padding: var(--s7) 0; }
.section--edge { background: var(--surface); border-block: 1px solid var(--frost); }

footer {
  border-top: 1px solid var(--frost);
  padding: var(--s7) 0 var(--s8);
  font-size: .9rem;
  color: var(--ink-soft);
}
.footcols { display: flex; flex-wrap: wrap; gap: var(--s7); justify-content: space-between; }
.footcols a { color: var(--ink-soft); text-decoration: none; display: block; padding: 3px 0; }
.footcols a:hover { color: var(--ink); }

/* ---------------------------------------------------------- кнопки и формы */

.btn {
  display: inline-block; padding: 11px 20px;
  font: inherit; font-weight: 500; line-height: 1.2;
  color: var(--ink); background: var(--surface);
  border: 1px solid var(--frost); border-radius: var(--radius-sm);
  text-decoration: none; cursor: pointer;
  transition: border-color .15s, transform .15s, background .15s;
}
.btn:hover { border-color: var(--ink-soft); }
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--mandarin); border-color: var(--mandarin);
  color: #10161f; font-weight: 600;
}
.btn--primary:hover { background: var(--mandarin-deep); border-color: var(--mandarin-deep); color: #fff; }
.btn--big { padding: 14px 26px; font-size: 1.05rem; }
.btn--quiet { background: transparent; border-color: transparent; color: var(--mandarin-deep); padding-inline: 4px; }
.btn--quiet:hover { border-color: var(--frost); }
.btn--danger { color: var(--mandarin-deep); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

label { display: block; margin: 0 0 var(--s4); font-size: .87rem; color: var(--ink-soft); }
label.check { display: flex; gap: var(--s2); align-items: center; color: var(--ink); font-size: 1rem; }
input, select, textarea {
  display: block; width: 100%; margin-top: 5px; padding: 10px 12px;
  font: inherit; color: var(--ink); background: var(--paper);
  border: 1px solid var(--frost); border-radius: var(--radius-sm);
}
input[type="checkbox"] { width: auto; margin: 0; accent-color: var(--mandarin); }
textarea { resize: vertical; }
:focus-visible { outline: 2px solid var(--mandarin); outline-offset: 2px; }

.row { display: flex; gap: var(--s3); align-items: flex-end; flex-wrap: wrap; }
.row label { flex: 1 1 170px; margin-bottom: var(--s3); }
.row .btn { margin-bottom: var(--s3); }
form.inline { display: inline; }

/* ---------------------------------------------------------- блоки */

.card {
  background: var(--surface); border: 1px solid var(--frost);
  border-radius: var(--radius); padding: var(--s5); margin: 0 0 var(--s4);
}
.card--narrow { max-width: 440px; }
.card--accent { border-color: var(--mandarin); }
.card > :last-child { margin-bottom: 0; }

.page-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: var(--s4); flex-wrap: wrap; margin-bottom: var(--s5);
}

.alert { padding: 12px 15px; border: 1px solid; border-radius: var(--radius-sm); margin: 0 0 var(--s4); }
.alert--ok { background: var(--ok-bg); border-color: var(--ok-line); }
.alert--error { background: var(--err-bg); border-color: var(--err-line); }
.alert > :last-child { margin-bottom: 0; }

.list { list-style: none; padding: 0; margin: 0 0 var(--s3); }
.list > li { padding: 10px 0; border-bottom: 1px solid var(--frost); }
.list > li:last-child { border-bottom: 0; }

.table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.table th {
  text-align: left; font-size: .76rem; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; color: var(--ink-soft);
  padding: 0 var(--s3) var(--s2) 0; border-bottom: 1px solid var(--frost);
}
.table td { padding: 11px var(--s3) 11px 0; border-bottom: 1px solid var(--frost); vertical-align: top; }
.table tr:last-child td { border-bottom: 0; }

.tag {
  font-size: .72rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  padding: 2px 8px; border-radius: 99px; background: var(--paper);
  border: 1px solid var(--frost); color: var(--ink-soft); white-space: nowrap;
}
.link-small {
  background: none; border: 0; padding: 0 5px; font: inherit; font-size: .88rem;
  color: var(--mandarin-deep); cursor: pointer; text-decoration: none;
}
.copyfield { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .88rem; }
.qa { padding: var(--s3) 0; border-bottom: 1px solid var(--frost); }
.qa:last-child { border-bottom: 0; }

/* ---------------------------------------------------------- главная: экран входа */

.hero { padding: var(--s8) 0 var(--s7); }
.hero h1 { max-width: 13em; }
.hero .lead { margin-bottom: var(--s5); }
.hero__actions { display: flex; align-items: center; gap: var(--s4); flex-wrap: wrap; }

/* ---------------------------------------------------------- цепочка (главный элемент) */

.chain { margin: var(--s8) 0 0; max-width: 620px; }
.chain__row {
  display: flex; align-items: center; justify-content: center;
  gap: var(--s3); flex-wrap: wrap; list-style: none; padding: 0; margin: 0;
}
.chain__card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--frost);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  padding: 13px 20px;
  font-weight: 600;
  white-space: nowrap;
  transform: rotate(var(--tilt, 0deg));
  animation: card-settle .5s cubic-bezier(.2, .9, .3, 1) both;
  animation-delay: calc(var(--i) * 110ms);
}
.chain__arrow {
  color: var(--mandarin);
  font-size: 1.3rem; line-height: 1;
  animation: arrow-in .35s ease-out both;
  animation-delay: calc(var(--i) * 110ms + 240ms);
}
.chain__loop { display: block; margin: -6px auto 0; max-width: 100%; height: auto; }
.chain__loop path {
  fill: none; stroke: var(--mandarin); stroke-width: 2;
  stroke-dasharray: 1000; stroke-dashoffset: 1000;
  animation: loop-draw 1.1s ease-out .75s both;
}
.chain__loop--narrow { display: none; }
.chain__note {
  text-align: center; margin: var(--s4) auto 0; max-width: 34em;
  color: var(--ink-soft); font-size: .95rem;
  animation: fade-up .5s ease-out 1.5s both;
}

@keyframes card-settle {
  from { opacity: 0; transform: translateY(10px) rotate(0deg); }
  to   { opacity: 1; transform: translateY(0) rotate(var(--tilt, 0deg)); }
}
@keyframes arrow-in { from { opacity: 0; transform: translateX(-6px); } to { opacity: 1; transform: none; } }
@keyframes loop-draw { to { stroke-dashoffset: 0; } }
@keyframes fade-up { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .chain__card, .chain__arrow, .chain__note, .chain__loop path { animation: none; }
  .chain__loop path { stroke-dashoffset: 0; }
  .btn { transition: none; }
}

/* ---------------------------------------------------------- сетки на лендинге */

.grid { display: grid; gap: var(--s4); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.relief { color: var(--ink); }
.relief__title { font-family: var(--font-display); font-size: 1.1rem; letter-spacing: -.01em; margin-bottom: var(--s2); }

.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps > li {
  counter-increment: step;
  display: grid; grid-template-columns: 2.6rem 1fr; gap: var(--s4);
  padding: var(--s5) 0; border-top: 1px solid var(--frost);
}
.steps > li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-display); font-size: .95rem;
  color: var(--mandarin); padding-top: 3px;
}
.steps > li:last-child { border-bottom: 1px solid var(--frost); }

.tiles { display: grid; gap: var(--s3); grid-template-columns: repeat(4, 1fr); }
.tile {
  display: block; padding: var(--s5); text-decoration: none; color: var(--ink);
  background: var(--surface); border: 1px solid var(--frost); border-radius: var(--radius);
  transition: border-color .15s, transform .15s;
}
.tile:hover { border-color: var(--mandarin); transform: translateY(-2px); }
.tile__name { font-family: var(--font-display); font-size: 1.05rem; margin-bottom: 5px; }
.tile__text { font-size: .9rem; color: var(--ink-soft); }

.faq { border-top: 1px solid var(--frost); }
.faq details { border-bottom: 1px solid var(--frost); }
.faq summary {
  padding: var(--s4) 0; cursor: pointer; font-weight: 500;
  list-style: none; display: flex; justify-content: space-between; gap: var(--s4);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--mandarin); font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details > p { padding-bottom: var(--s4); max-width: 46em; color: var(--ink-soft); }

.plans { width: 100%; border-collapse: collapse; }
.plans th, .plans td { padding: var(--s3) var(--s3) var(--s3) 0; border-bottom: 1px solid var(--frost); text-align: left; }
.plans th { font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-soft); font-weight: 600; }
.plans .price { font-family: var(--font-display); font-size: 1.1rem; white-space: nowrap; }

.cta {
  background: var(--ink); color: var(--paper);
  border-radius: var(--radius); padding: var(--s8) var(--s5); text-align: center;
}
.cta h2 { color: var(--paper); }
.cta p { color: color-mix(in srgb, var(--paper) 72%, transparent); max-width: 34em; margin-inline: auto; }

@media (max-width: 860px) {
  .grid--3, .grid--4, .grid--2, .tiles { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .section { padding: var(--s7) 0; }
  .grid--3, .grid--4, .grid--2, .tiles { grid-template-columns: 1fr; }
  .chain__row { flex-direction: column; gap: var(--s2); }
  .chain__arrow { transform: rotate(90deg); }
  .chain__loop { display: none; }
  .chain__loop--narrow { display: block; }
  .topnav { gap: var(--s4); font-size: .9rem; }
  .cta { padding: var(--s7) var(--s4); }
}

/* Замыкание цепочки на узком экране: дугу рисовать негде, показываем возврат карточкой */
.chain__loopback { display: none; }
@media (max-width: 620px) {
  .chain__loopback { display: block; }
  .chain__card--ghost { background: transparent; box-shadow: none; border-style: dashed; color: var(--ink-soft); }
}

.chain__row { max-width: 620px; margin-inline: auto; }
.chain__loop--arrowhead { fill: var(--mandarin); stroke: none; animation: fade-up .4s ease-out 1.7s both; }