/* СИГАЛ — производство пластмассовых изделий для строительства
   Палитра: глубокий синий + янтарный акцент, светлый фон */

:root {
  --c-bg: #f4f6fa;
  --c-surface: #ffffff;
  --c-ink: #1b2434;
  --c-ink-soft: #4c5a70;
  --c-primary: #14406b;
  --c-primary-deep: #0d2c4c;
  --c-accent: #f2a415;
  --c-accent-dark: #cf8807;
  --c-border: #dbe2ec;
  --c-danger: #c23b3b;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(13, 44, 76, 0.10);
  --font-head: 'Oswald', 'Arial Narrow', sans-serif;
  --font-body: 'PT Sans', Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--c-ink);
  background: var(--c-bg);
}

h1, h2, h3 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 0.5em;
}

p { margin: 0 0 1em; }

.container {
  width: min(1120px, 100% - 40px);
  margin-inline: auto;
}

/* ---------- Кнопки ---------- */

.btn {
  display: inline-block;
  padding: 14px 32px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--c-primary-deep);
  background: var(--c-accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}

.btn:hover { background: var(--c-accent-dark); transform: translateY(-2px); }
.btn:focus-visible { outline: 3px solid var(--c-primary); outline-offset: 2px; }

.btn--ghost {
  color: #fff;
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.75);
}

.btn--ghost:hover { background: rgba(255, 255, 255, 0.12); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 110px 0 90px;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(13, 44, 76, 0.94), rgba(20, 64, 107, 0.86)),
    repeating-linear-gradient(45deg, #14406b 0 22px, #123a63 22px 44px);
  overflow: hidden;
}

.hero__inner { position: relative; max-width: 780px; }

.hero__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  padding: 8px 18px;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-accent);
  border: 1px solid rgba(242, 164, 21, 0.45);
  border-radius: 999px;
}

.hero__title {
  font-size: clamp(30px, 5vw, 50px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.hero__subtitle {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 34px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- Секции ---------- */

.sections { padding: 44px 0; }

.section-title {
  font-size: clamp(24px, 3.4vw, 34px);
  text-transform: uppercase;
  color: var(--c-primary-deep);
}

.sec-head {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 20px;
}

.card__num {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  background: var(--c-primary);
  border-radius: 50%;
}

.lead {
  max-width: 760px;
  font-size: 18px;
  color: var(--c-ink-soft);
  margin-bottom: 28px;
}

/* ---------- Карточки ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.cards--3 { grid-template-columns: repeat(3, 1fr); }
.cards--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  padding: 26px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.icon-card { text-align: left; }

.icon-card__icon {
  display: inline-grid;
  place-items: center;
  width: 58px;
  height: 58px;
  margin-bottom: 14px;
  color: var(--c-primary);
  background: rgba(20, 64, 107, 0.08);
  border-radius: 12px;
}

.card__title { font-size: 20px; color: var(--c-primary-deep); }

.card p { color: var(--c-ink-soft); margin: 0; }

.card__list {
  margin: 0;
  padding-left: 20px;
  color: var(--c-ink-soft);
}

.card__list li { margin-bottom: 6px; }
.card__list li::marker { color: var(--c-accent); }

.card__muted { font-size: 14.5px; }

.source-link,
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  font-weight: 700;
  color: var(--c-primary);
  text-decoration: none;
  border-bottom: 1.5px solid rgba(20, 64, 107, 0.3);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.contact-link { margin-top: 4px; font-size: 18px; border-bottom: none; }

.source-link:hover,
.contact-link:hover { color: var(--c-accent-dark); border-color: var(--c-accent-dark); }

/* ---------- Шаги ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 26px 22px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.step__num {
  display: block;
  font-family: var(--font-head);
  font-size: 34px;
  font-weight: 700;
  color: var(--c-accent);
  margin-bottom: 8px;
}

.step__title { font-size: 19px; color: var(--c-primary-deep); }
.step p { margin: 0; color: var(--c-ink-soft); font-size: 15.5px; }

/* ---------- CTA и форма ---------- */

.cta {
  padding: 70px 0 90px;
  color: #fff;
  background: linear-gradient(135deg, var(--c-primary-deep), var(--c-primary));
}

.cta__inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: start;
}

.cta .section-title { color: #fff; }
.cta__text p { color: rgba(255, 255, 255, 0.88); }
.cta__note { font-size: 15.5px; }

.form {
  padding: 30px;
  background: var(--c-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--c-ink);
}

.form__field { margin-bottom: 18px; }

.form__field label {
  display: block;
  margin-bottom: 6px;
  font-weight: 700;
  font-size: 15px;
  color: var(--c-primary-deep);
}

.form__field input[type="text"],
.form__field input[type="tel"] {
  width: 100%;
  padding: 12px 14px;
  font: inherit;
  color: var(--c-ink);
  background: #fff;
  border: 1.5px solid var(--c-border);
  border-radius: 8px;
  transition: border-color 0.15s ease;
}

.form__field input:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(20, 64, 107, 0.15);
}

.form__field input[aria-invalid="true"] { border-color: var(--c-danger); }

.form__field--check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.form__field--check input { margin-top: 5px; width: 18px; height: 18px; accent-color: var(--c-primary); }
.form__field--check label { font-weight: 400; font-size: 14.5px; color: var(--c-ink-soft); margin: 0; }

.form__field--check a { color: var(--c-primary); }

.form__error {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--c-danger);
}

.form__submit { width: 100%; margin-top: 6px; }

.form-success {
  padding: 40px 30px;
  text-align: center;
  color: var(--c-primary-deep);
  background: var(--c-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-success svg { color: var(--c-accent); margin-bottom: 12px; }
.form-success h3 { font-size: 24px; }
.form-success p { color: var(--c-ink-soft); margin: 0; }

/* ---------- Футер ---------- */

.footer { margin-top: -1px; }

.footer__wave {
  display: block;
  width: 100%;
  height: 70px;
  fill: var(--c-primary-deep);
  background: transparent;
}

.footer__band {
  padding: 10px 0 46px;
  color: rgba(255, 255, 255, 0.85);
  background: var(--c-primary-deep);
}

.footer__inner { text-align: center; }

.footer__mark { color: var(--c-accent); margin-bottom: 10px; }

.footer__name {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 8px;
}

.footer__entity { font-size: 15px; margin-bottom: 14px; }

.footer__links { margin-bottom: 10px; }

.footer__links a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 14.5px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.footer__copy {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 14px;
}

.footer__disclaimer {
  max-width: 640px;
  margin: 0 auto;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- Служебные страницы (политика) ---------- */

.page-head {
  padding: 22px 0;
  color: #fff;
  background: var(--c-primary-deep);
}

.page-head .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.page-head__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent);
  text-decoration: none;
}

.page-head__back {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}

.page-head__back:hover { color: var(--c-accent); border-color: var(--c-accent); }

.legal { padding: 50px 0 80px; }

.legal__inner { max-width: 820px; }

.legal h1 {
  font-size: clamp(26px, 4vw, 36px);
  text-transform: uppercase;
  color: var(--c-primary-deep);
}

.legal h2 {
  margin-top: 34px;
  font-size: 21px;
  color: var(--c-primary);
}

.legal p, .legal li { color: var(--c-ink-soft); }
.legal ul { padding-left: 22px; }

/* ---------- Reveal-анимация ---------- */.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover { transform: none; }
}

/* ---------- Адаптив ---------- */

@media (max-width: 980px) {
  .cards--4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .cta__inner { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .hero { padding: 80px 0 64px; }
  .cards,
  .cards--3,
  .cards--4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .sec-head { align-items: flex-start; }
}