/* КСД Проект — Слой 1. Токены нейтральные; акцент меняется в --color-accent* */

:root {
  /* Surface */
  --color-bg: #f2efe8;
  --color-bg-elevated: #faf8f3;
  --color-ink: #1c1a17;
  --color-ink-muted: #5c574e;
  --color-line: #d4cbb8;

  /* Accent — НЕЙТРАЛЬНЫЙ (позже охра или зелёный одной правкой) */
  --color-accent: #5c574e;
  --color-accent-hover: #3f3b35;
  --color-accent-soft: #e4dfd4;

  --color-success: #2f5d4a;
  --color-danger: #8b3a2f;
  --color-focus: var(--color-accent);

  /* Fonts: self-host later → swap url() here */
  --font-display: "Georgia", "Times New Roman", serif;
  --font-body: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "Consolas", "IBM Plex Mono", ui-monospace, monospace;

  --text-hero: clamp(2rem, 5vw, 3.25rem);
  --text-h1: clamp(1.75rem, 3.5vw, 2.25rem);
  --text-h2: clamp(1.35rem, 2.5vw, 1.5rem);
  --text-body: 1.125rem;
  --text-small: 0.875rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;
  --space-section: clamp(3rem, 7vw, 5rem);

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --shadow-soft: 0 1px 0 rgba(28, 26, 23, 0.06);

  --header-h: 3.75rem;
  --container: min(1120px, calc(100% - 2rem));
  --content-max: 40rem;
  --bp: 920px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-bg);
}

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

a {
  color: var(--color-ink);
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--color-accent-hover);
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -100px;
  z-index: 100;
  background: var(--color-ink);
  color: var(--color-bg-elevated);
  padding: var(--space-2) var(--space-3);
}

.skip-link:focus {
  top: var(--space-2);
}

.container {
  width: var(--container);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg-elevated) 92%, transparent);
  border-bottom: 1px solid var(--color-line);
  backdrop-filter: blur(8px);
}

.header-inner {
  min-height: var(--header-h);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  padding-block: var(--space-2);
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.nav-toggle {
  margin-left: auto;
  font: inherit;
  border: 1px solid var(--color-line);
  background: var(--color-bg-elevated);
  color: var(--color-ink);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.site-nav {
  display: none;
  width: 100%;
}

.site-nav.is-open {
  display: block;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-nav a {
  text-decoration: none;
  font-size: var(--text-small);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
}

.header-phone {
  font-size: var(--text-small);
  text-decoration: none;
  font-variant-numeric: tabular-nums;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font: inherit;
  font-size: var(--text-small);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg-elevated);
  border-color: var(--color-accent);
}

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

/* Hero */
.hero {
  position: relative;
  min-height: min(88vh, 720px);
  display: grid;
  align-items: end;
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
}

.hero-visual {
  position: absolute;
  inset: 0;
  color: var(--color-line);
  background:
    linear-gradient(180deg, transparent 35%, var(--color-bg) 92%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 23px,
      color-mix(in srgb, var(--color-line) 35%, transparent) 24px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 23px,
      color-mix(in srgb, var(--color-line) 35%, transparent) 24px
    ),
    var(--color-bg-elevated);
}

.plan-svg {
  width: min(920px, 110%);
  height: auto;
  margin: 8vh auto 0;
  opacity: 0.85;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-block: var(--space-6) var(--space-5);
  max-width: 42rem;
}

.brand-mark {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.05;
}

.hero h1 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 600;
  line-height: 1.15;
}

.hero-lead {
  margin: 0 0 var(--space-4);
  color: var(--color-ink-muted);
  max-width: var(--content-max);
}

.price-anchor {
  margin: 0 0 var(--space-4);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.01em;
}

/* Sections */
.section {
  padding-block: var(--space-section);
}

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

.section h2 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-h2);
  font-weight: 600;
  line-height: 1.25;
}

.section-lead {
  margin: 0 0 var(--space-5);
  color: var(--color-ink-muted);
  max-width: var(--content-max);
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}

.steps li {
  border-top: 1px solid var(--color-line);
  padding-top: var(--space-3);
}

.step-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-small);
  color: var(--color-ink-muted);
  margin-bottom: var(--space-2);
}

.steps h3 {
  margin: 0 0 var(--space-2);
  font-size: 1.05rem;
  font-weight: 600;
}

.steps p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: var(--text-small);
}

.result-doc {
  display: grid;
  gap: var(--space-5);
}

.plain-list {
  margin: var(--space-4) 0 0;
  padding-left: 1.1rem;
  color: var(--color-ink-muted);
}

.stamp-placeholder {
  display: grid;
  place-items: center;
  min-height: 180px;
  border: 1px dashed var(--color-line);
  background: var(--color-bg);
}

.stamp {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-align: center;
  color: color-mix(in srgb, var(--color-accent) 70%, var(--color-ink));
  border: 3px solid currentColor;
  padding: var(--space-4) var(--space-5);
  transform: rotate(-6deg);
  opacity: 0.75;
}

.stamp span {
  display: block;
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  letter-spacing: 0;
  font-weight: 400;
}

.case-card {
  border: 1px solid var(--color-line);
  background: var(--color-bg-elevated);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  max-width: 36rem;
}

.case-meta {
  margin: 0 0 var(--space-2);
  font-size: var(--text-small);
}

.case-meta span {
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
}

.faq-list details {
  border-top: 1px solid var(--color-line);
  padding: var(--space-3) 0;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
}

.faq-list p {
  margin: var(--space-2) 0 0;
  color: var(--color-ink-muted);
  max-width: var(--content-max);
}

.cta-band {
  text-align: center;
}

.cta-band p {
  color: var(--color-ink-muted);
  max-width: var(--content-max);
  margin-inline: auto;
}

/* Form */
.form-wrap {
  max-width: 32rem;
}

.lead-form {
  display: grid;
  gap: var(--space-3);
}

.lead-form label {
  display: grid;
  gap: var(--space-1);
  font-size: var(--text-small);
}

.lead-form input,
.lead-form textarea {
  font: inherit;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
  color: var(--color-ink);
}

.lead-form .consent {
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
  grid-template-columns: none;
}

.lead-form .consent input {
  margin-top: 0.25rem;
}

.hp {
  position: absolute !important;
  left: -9999px !important;
  width: 1px !important;
  height: 1px !important;
  opacity: 0 !important;
}

.form-status {
  margin: 0;
  font-size: var(--text-small);
}

.form-status.is-ok {
  color: var(--color-success);
}

.form-status.is-err {
  color: var(--color-danger);
}

.lead-form.is-success .btn-primary,
.lead-form.is-success label:not(.consent) {
  display: none;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-line);
  padding-block: var(--space-5);
  font-size: var(--text-small);
  color: var(--color-ink-muted);
}

.footer-inner {
  display: grid;
  gap: var(--space-4);
}

.footer-brand {
  margin: 0 0 var(--space-2);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 700;
}

.footer-inner a {
  display: inline-block;
  margin-right: var(--space-3);
  color: var(--color-ink-muted);
}

.copy {
  margin: 0;
}

/* Desktop */
@media (min-width: 920px) {
  .nav-toggle {
    display: none;
  }

  .header-inner {
    flex-wrap: nowrap;
    gap: var(--space-4);
  }

  .site-nav {
    display: block;
    width: auto;
    flex: 1;
  }

  .site-nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-3) var(--space-4);
  }

  .header-actions {
    width: auto;
    margin-left: auto;
  }

  .steps {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }

  .steps li {
    border-top: none;
    border-left: 1px solid var(--color-line);
    padding: 0 0 0 var(--space-3);
  }

  .steps li:first-child {
    border-left: none;
    padding-left: 0;
  }

  .result-doc {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }

  .footer-inner {
    grid-template-columns: 1.2fr 1fr;
  }

  .copy {
    grid-column: 1 / -1;
  }
}