/* =========================================================
   СистемаПро — Design System
   Light service aesthetic: confident, trustworthy, precise
   ========================================================= */

/* --- GOOGLE FONTS --- */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700;800;900&display=swap');

/* --- TOKENS --- */
:root {
  --c-accent: #be1622;
  --c-accent-dark: #9e121d;
  --c-text: #1a1a1a;
  --c-muted: #666;
  --c-bg: #fff;
  --c-soft: #f7f8fa;
  --c-border: #e7e9ee;
  --radius: 10px;
  --container: 1140px;
  --font-head: 'Montserrat', system-ui, Arial, sans-serif;
  --font-body: system-ui, 'Inter', Arial, sans-serif;

  /* extended tokens */
  --c-dark: #111419;
  --c-dark-muted: #8a909c;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.06);
  --shadow-md: 0 6px 24px rgba(0,0,0,.10);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.14);
  --transition: 200ms ease;
  --header-h: 68px;
}

/* --- RESET & BASE --- */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.15;
  margin: 0 0 .5em;
}

p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul, ol { padding-left: 1.4em; }

/* --- LAYOUT --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.section { padding: 56px 0; }

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn:active { transform: translateY(1px); }

.btn--accent {
  background: var(--c-accent);
  color: #fff;
  border-color: var(--c-accent);
  box-shadow: 0 4px 14px rgba(190,22,34,.25);
}

.btn--accent:hover {
  background: var(--c-accent-dark);
  border-color: var(--c-accent-dark);
  box-shadow: 0 6px 20px rgba(190,22,34,.35);
}

.btn--ghost {
  background: #fff;
  color: var(--c-text);
  border-color: var(--c-border);
}

.btn--ghost:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

.btn--lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

/* --- DOORS (5 situation entry points) --- */
.doors {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
}

.door {
  display: block;
  background: var(--c-soft);
  border: 1px solid var(--c-border);
  border-left: 4px solid var(--c-accent);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}

.door:hover {
  background: #fff;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.door__icon {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

.door__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  color: var(--c-text);
  margin: 0 0 6px;
}

.door__desc {
  font-size: .875rem;
  color: var(--c-muted);
  margin: 0;
  line-height: 1.4;
}

/* --- TRUST BAR --- */
.trust {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  color: var(--c-muted);
}

.trust__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.trust b, .trust__num {
  color: var(--c-text);
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 900;
  line-height: 1;
}

.trust__label {
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--c-muted);
}

/* --- CARD --- */
.card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* --- FORM --- */
.form {
  display: grid;
  gap: 12px;
  max-width: 520px;
}

.form input,
.form textarea,
.form select {
  padding: 12px 16px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  font: inherit;
  font-size: .95rem;
  color: var(--c-text);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}

.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(190,22,34,.10);
}

.form textarea {
  resize: vertical;
  min-height: 100px;
}

.form label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--c-muted);
  display: block;
  margin-bottom: 4px;
}

.form__group {
  display: grid;
  gap: 4px;
}

/* honeypot — visually hidden from real users */
.hp {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
  tab-size: 0;
}

/* --- HEADER --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border);
  height: var(--header-h);
  display: flex;
  align-items: center;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 32px;
  width: 100%;
}

.site-header__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.site-header__logo img {
  height: 38px;
  width: auto;
}

.site-nav {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
  justify-content: center;
}

.site-nav__link {
  display: block;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--c-muted);
  transition: color var(--transition), background var(--transition);
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--c-text);
  background: var(--c-soft);
}

.site-header__cta {
  flex-shrink: 0;
  margin-left: auto;
}

/* burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}

.burger__line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.site-header.is-open .burger__line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header.is-open .burger__line:nth-child(2) { opacity: 0; }
.site-header.is-open .burger__line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- FOOTER --- */
.site-footer {
  background: var(--c-dark);
  color: rgba(255,255,255,.75);
  padding: 48px 0 28px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.site-footer__brand-logo {
  height: 36px;
  width: auto;
  margin-bottom: 16px;
  /* invert logo for dark bg */
  filter: brightness(0) invert(1);
}

.site-footer__tagline {
  font-size: .875rem;
  color: rgba(255,255,255,.5);
  line-height: 1.6;
  max-width: 240px;
  margin-bottom: 20px;
}

.site-footer__contacts {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__contact-link {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .925rem;
  color: rgba(255,255,255,.75);
  transition: color var(--transition);
}

.site-footer__contact-link:hover { color: #fff; }

.site-footer__contact-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: .6;
}

.site-footer__heading {
  font-family: var(--font-head);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(255,255,255,.35);
  margin: 0 0 16px;
}

.site-footer__nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__nav a {
  font-size: .9rem;
  color: rgba(255,255,255,.65);
  transition: color var(--transition);
}

.site-footer__nav a:hover { color: #fff; }

.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.site-footer__copy {
  font-size: .8rem;
  color: rgba(255,255,255,.35);
}

.site-footer__badge {
  font-size: .75rem;
  color: rgba(255,255,255,.25);
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-footer__accent-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-accent);
  display: inline-block;
}

/* --- HERO SECTION UTILITIES --- */
.hero {
  background: var(--c-soft);
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--c-border);
}

.hero__label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 20px;
}

.hero__label::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-accent);
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.4rem);
  color: var(--c-text);
  margin-bottom: 20px;
  max-width: 780px;
}

.hero__sub {
  font-size: 1.1rem;
  color: var(--c-muted);
  max-width: 540px;
  margin-bottom: 36px;
}

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

/* --- SECTION HEADER UTILITY --- */
.section__header {
  margin-bottom: 40px;
}

.section__label {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 10px;
}

.section__title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  margin: 0;
}

/* --- ACCENT STRIP --- */
.accent-strip {
  display: inline-block;
  background: var(--c-accent);
  color: #fff;
  padding: 0 6px 2px;
  border-radius: 3px;
}

/* --- BADGE --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 700;
  background: rgba(190,22,34,.08);
  color: var(--c-accent);
}

/* --- DIVIDER --- */
.divider {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: 40px 0;
}

/* --- MOBILE NAV OVERLAY --- */
.mobile-nav {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: rgba(255,255,255,.98);
  backdrop-filter: blur(10px);
  z-index: 99;
  padding: 24px 20px;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
}

.mobile-nav.is-open { display: flex; }

.mobile-nav__link {
  display: block;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 1.1rem;
  font-weight: 700;
  font-family: var(--font-head);
  color: var(--c-text);
  border-bottom: 1px solid var(--c-border);
}

.mobile-nav__link:hover { color: var(--c-accent); }

.mobile-nav__cta {
  margin-top: 16px;
}

/* --- GRID UTILITIES --- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* --- TEXT UTILITIES --- */
.text-accent { color: var(--c-accent); }
.text-muted   { color: var(--c-muted); }
.text-center  { text-align: center; }
.text-small   { font-size: .875rem; }

/* --- RESPONSIVE --- */
@media (max-width: 900px) {
  .site-nav,
  .site-header__cta { display: none; }
  .burger { display: flex; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 40px 0; }
  .hero { padding: 48px 0 40px; }
  .site-footer__grid { grid-template-columns: 1fr; gap: 28px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .site-footer__bottom { flex-direction: column; align-items: flex-start; gap: 12px; }
  .trust { gap: 20px; }
}