/* Дельфин — сайт. Палитра и шрифты в тон polygraph.moscow (тёмная тема), плюс зелёная кривая полиграфа. */
:root {
  --page: #0a0e12;
  --surface: #11171e;
  --surface-2: #161e27;
  --line: #222c38;
  --line-strong: #2f3b49;
  --ink: #eef3f7;
  --ink-2: #b4c0cc;
  --ink-3: #8a97a5;
  --accent: #229ed9;
  --accent-strong: #156d97;
  --accent-soft: rgba(34, 158, 217, 0.12);
  --trace: #34f5a4;
  --font-sans: "Manrope", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  --radius: 14px;
  --wrap: 1180px;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 16px/1.6 var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.wrap {
  width: min(var(--wrap), 100% - 32px);
  margin-inline: auto;
}

/* ---- header ---- */
.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 14, 18, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.top .wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
}

.logo:hover {
  text-decoration: none;
}

.logo img {
  width: 40px;
  height: 40px;
  margin: -4px;
}

.logo small {
  font-weight: 500;
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0;
}

.nav {
  display: flex;
  gap: 22px;
  margin-left: auto;
}

.nav a {
  color: var(--ink-2);
  font-size: 15px;
}

.nav a:hover {
  color: var(--ink);
  text-decoration: none;
}

.top .phone {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
  white-space: nowrap;
}

/* ---- buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  font: 600 15px/1.2 var(--font-sans);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
  white-space: nowrap;
}

.btn:hover {
  text-decoration: none;
  border-color: var(--ink-3);
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.btn--lg {
  padding: 15px 26px;
  font-size: 16px;
}

/* ---- hero ---- */
.hero {
  position: relative;
  padding: 88px 0 72px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse at 70% 40%, #000 20%, transparent 70%);
  pointer-events: none;
}

.hero .wrap {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-2);
  font: 500 13px var(--font-mono);
}

.eyebrow i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--trace);
  box-shadow: 0 0 10px var(--trace);
}

h1 {
  margin: 18px 0 16px;
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 800;
}

h1 em {
  font-style: normal;
  color: var(--accent);
}

.lede {
  color: var(--ink-2);
  font-size: 18px;
  max-width: 560px;
  margin: 0 0 28px;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.cta .note {
  color: var(--ink-3);
  font-size: 14px;
  width: 100%;
  margin-top: 4px;
}

.platforms {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 22px 0 0;
  color: var(--ink-3);
  font-size: 14px;
}

.platforms span {
  margin-right: 4px;
}

.platforms b {
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--ink);
  font: 500 13px var(--font-mono);
}

.hero-art {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #0b1220;
  overflow: hidden;
  box-shadow: 0 30px 80px -30px rgba(34, 158, 217, 0.35);
}

.hero-art .bar {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid #1c2840;
  font: 12px var(--font-mono);
  color: var(--ink-3);
  align-items: center;
}

.hero-art .bar b {
  color: var(--ink);
  font-weight: 600;
  margin-right: auto;
}

.lamp {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 6px #22c55e;
  margin: 0 3px 0 8px;
}

/* ---- sections ---- */
section {
  padding: 84px 0;
}

section.alt {
  background: var(--surface);
  border-block: 1px solid var(--line);
}

h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  font-weight: 800;
}

.sub {
  color: var(--ink-2);
  max-width: 680px;
  margin: 0 0 40px;
  font-size: 17px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

section.alt .card {
  background: var(--page);
}

.card h3 {
  margin: 14px 0 8px;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--ink-2);
  font-size: 15px;
}

.ic {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent);
}

.ic svg {
  width: 22px;
  height: 22px;
}

/* devices */
.devices {
  display: grid;
  grid-template-columns: 1fr 1fr 1.2fr;
  gap: 16px;
}

.device {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  background: var(--surface-2);
}

.device .tag {
  font: 500 12px var(--font-mono);
  color: var(--trace);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.device h3 {
  font-size: 30px;
  margin: 6px 0 6px;
  letter-spacing: -0.02em;
}

.device p {
  color: var(--ink-2);
  margin: 0;
  font-size: 15px;
}

/* Device photo behind the card text: dimmed photo, then a gradient that keeps the text area dark. */
.device--photo {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  min-height: 300px;
  /* Room below the text for the device in the photo, however the text wraps. */
  padding-bottom: 124px;
}
.device--photo::before,
.device--photo::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
}
.device--photo::before {
  background: var(--photo) var(--photo-pos, center bottom) / var(--photo-size, cover) no-repeat var(--photo-bg, transparent);
  filter: grayscale(0.3) brightness(var(--photo-brightness, 0.7));
}
.device--photo::after {
  background: linear-gradient(180deg, rgba(22, 30, 39, 0.97) 0%, rgba(22, 30, 39, 0.86) 42%, rgba(22, 30, 39, 0.35) 100%);
}
.device--kris {
  --photo: url("devices/kris.webp");
  /* The KRIS unit sits at x 234–339, y 101–159 of the 500×350 photo. At 1.5× it is
     centred and pinned 16px above the card bottom; the studio grey fills any gap. */
  --photo-size: 750px auto;
  --photo-pos: left calc(50% - 55px) bottom -271px;
  --photo-bg: #f1f2f8;
  --photo-brightness: 0.5;
}
.device--rif {
  --photo: url("devices/rif.webp");
}

.device--adapt {
  background: linear-gradient(160deg, rgba(34, 158, 217, 0.16), rgba(52, 245, 164, 0.06));
  border-color: rgba(34, 158, 217, 0.45);
}

.device--adapt .tag {
  color: var(--accent);
}

.device--adapt h3 {
  font-size: 24px;
}

.device--adapt .btn {
  margin-top: 18px;
}

/* steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 22px 22px 22px;
  border-top: 2px solid var(--line-strong);
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font: 600 13px var(--font-mono);
  color: var(--accent);
}

.step h3 {
  margin: 8px 0 6px;
  font-size: 17px;
}

.step p {
  margin: 0;
  color: var(--ink-2);
  font-size: 15px;
}

kbd {
  font: 500 12px var(--font-mono);
  padding: 1px 6px;
  border-radius: 5px;
  border: 1px solid var(--line-strong);
  background: var(--surface-2);
  color: var(--ink);
}

/* privacy band */
.privacy {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: center;
  padding: 34px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.privacy .ic {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: rgba(52, 245, 164, 0.1);
  color: var(--trace);
}

.privacy .ic svg {
  width: 32px;
  height: 32px;
}

.privacy h3 {
  margin: 0 0 6px;
  font-size: 22px;
}

.privacy p {
  margin: 0;
  color: var(--ink-2);
}

/* how to get */
.get {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: start;
}

.checks {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.checks li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  color: var(--ink-2);
}

.checks li::before {
  content: "✓";
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}

.checks b {
  color: var(--ink);
}

/* contacts + form */
.contact {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
}

.contact aside,
.form {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface-2);
  padding: 30px;
}

.contact-row {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.contact-row:last-child {
  border-bottom: 0;
}

.contact-row .meta {
  display: block;
  color: var(--ink-3);
  font-size: 13px;
}

.contact-row a,
.contact-row span:not(.meta) {
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
}

.big-phone {
  font-family: var(--font-mono);
  font-size: 22px !important;
}

.form h3 {
  margin: 0 0 4px;
  font-size: 22px;
}

.form .lede {
  font-size: 15px;
  margin-bottom: 20px;
}

.row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}

.field label {
  font-size: 13px;
  color: var(--ink-3);
}

.input,
.select,
.textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: var(--page);
  color: var(--ink);
  font: 15px var(--font-sans);
}

.textarea {
  min-height: 90px;
  resize: vertical;
}

.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.input.is-invalid {
  border-color: #ef4444;
}

.consent {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 13px;
  color: var(--ink-3);
  margin: 6px 0 14px;
}

.consent input {
  margin-top: 3px;
}

.form .btn {
  width: 100%;
}

.form-error {
  display: none;
  color: #fca5a5;
  font-size: 14px;
  margin: 12px 0 0;
}

.form-error.is-visible {
  display: block;
}

.form-success {
  display: none;
  text-align: center;
  padding: 40px 10px;
}

.form.is-sent .form-success {
  display: block;
}

.form.is-sent .form-fields {
  display: none;
}

.form-success b {
  display: block;
  font-size: 22px;
  color: var(--trace);
  margin-bottom: 8px;
}

.form-success p {
  color: var(--ink-2);
  margin: 0 0 16px;
}

/* footer */
.foot {
  padding: 40px 0 56px;
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 14px;
}

.foot .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  justify-content: space-between;
  align-items: center;
}

.foot a {
  color: var(--ink-2);
}

/* ---- docs ---- */
.docs {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  padding: 48px 0 80px;
}

.toc {
  position: sticky;
  top: 88px;
  align-self: start;
  font-size: 14px;
}

.toc b {
  display: block;
  color: var(--ink-3);
  font: 500 12px var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.toc a {
  display: block;
  color: var(--ink-2);
  padding: 4px 0 4px 12px;
  border-left: 2px solid var(--line);
}

.toc a:hover {
  color: var(--ink);
  border-left-color: var(--accent);
  text-decoration: none;
}

.doc h1 {
  font-size: clamp(32px, 4vw, 46px);
  margin-top: 0;
}

.doc h2 {
  font-size: 26px;
  margin: 48px 0 12px;
  padding-top: 8px;
  scroll-margin-top: 80px;
}

.doc h3 {
  font-size: 18px;
  margin: 26px 0 8px;
}

.doc p,
.doc li {
  color: var(--ink-2);
}

.doc li {
  margin: 4px 0;
}

.doc code {
  font: 14px var(--font-mono);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 6px;
  color: var(--ink);
}

.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 8px;
  font-size: 15px;
}

.doc th,
.doc td {
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.doc th {
  color: var(--ink-3);
  font-weight: 500;
}

.doc td {
  color: var(--ink-2);
}

.callout {
  border: 1px solid rgba(34, 158, 217, 0.45);
  background: var(--accent-soft);
  border-radius: 12px;
  padding: 14px 18px;
  margin: 16px 0;
  color: var(--ink-2);
}

.callout b {
  color: var(--ink);
}

/* ---- responsive ---- */
@media (max-width: 980px) {
  .hero .wrap,
  .get,
  .contact {
    grid-template-columns: 1fr;
  }

  .grid,
  .devices {
    grid-template-columns: 1fr 1fr;
  }

  .steps {
    grid-template-columns: 1fr 1fr;
  }

  .nav {
    display: none;
  }

  .top .phone {
    margin-left: auto;
  }

  .docs {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }
}

@media (max-width: 620px) {
  .hero {
    padding: 48px 0 48px;
  }

  section {
    padding: 56px 0;
  }

  .grid,
  .devices,
  .steps,
  .row-2 {
    grid-template-columns: 1fr;
  }

  .privacy {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .contact aside,
  .form {
    padding: 22px;
  }

  .top .btn {
    display: none;
  }

  .hero-art .bar .lbl {
    display: none;
  }

  .hero-art .bar b {
    white-space: nowrap;
  }

  .logo small {
    display: none;
  }
}

/* Grid columns must be allowed to shrink below their content (tables, code). */
.docs > *,
.hero .wrap > *,
.contact > *,
.get > * {
  min-width: 0;
}

@media (max-width: 620px) {
  .doc table {
    display: block;
    overflow-x: auto;
  }
}