/* ==========================================================================
   QTRONIX Smart Solutions — style.css
   Тёмно-синяя тема с бирюзовым акцентом
   ========================================================================== */

:root {
  --color-bg: #0a1628;
  --color-bg-alt: #0e1d33;
  --color-surface: #131f36;
  --color-surface-hover: #182643;
  --color-border: rgba(136, 153, 170, 0.16);
  --color-text: #e8edf4;
  --color-text-muted: #8899aa;
  --color-text-dim: #61748c;
  --color-accent: #00b4d8;
  --color-accent-2: #0077b6;
  --color-accent-soft: rgba(0, 180, 216, 0.12);
  --color-success: #2fbf71;
  --color-error: #e2596a;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-accent: 0 10px 30px rgba(0, 180, 216, 0.25);
  --container-w: 1180px;
  --header-h: 76px;
  --transition: 0.25s ease;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

ul { list-style: none; margin: 0; padding: 0; }

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Типографика ---------- */

h1, h2, h3 { line-height: 1.25; margin: 0; font-weight: 700; }

.section-eyebrow {
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 13px;
  font-weight: 600;
  margin: 0 0 12px;
}

.section-title {
  font-size: clamp(28px, 4vw, 38px);
  margin: 0 0 44px;
  font-weight: 800;
}

/* ---------- Кнопки ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  white-space: nowrap;
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  color: #ffffff;
  box-shadow: var(--shadow-accent);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(0, 180, 216, 0.35);
}

.btn-large { padding: 16px 34px; font-size: 16px; }

/* ---------- Хедер ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 21px;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.logo-icon {
  color: var(--color-accent);
  font-size: 22px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  margin: 0 auto;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav-link:hover {
  color: var(--color-text);
}

.nav-link:hover::after {
  width: 100%;
}

.header-cta { flex-shrink: 0; }

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
}

.burger span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

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

/* ---------- HERO ---------- */

.hero {
  position: relative;
  padding: 96px 0 80px;
  overflow: hidden;
  background: radial-gradient(circle at 80% -10%, rgba(0, 180, 216, 0.14), transparent 55%),
              linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero-glow {
  position: absolute;
  top: -160px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(0, 180, 216, 0.18), transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-title {
  font-size: clamp(32px, 5vw, 54px);
  max-width: 900px;
  margin-bottom: 22px;
  letter-spacing: -0.01em;
}

.hero-subtitle {
  max-width: 680px;
  color: var(--color-text-muted);
  font-size: 17px;
  margin-bottom: 36px;
}

.triggers-grid {
  margin-top: 72px;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: left;
}

.trigger-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 26px 22px;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.trigger-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 180, 216, 0.4);
  background: var(--color-surface-hover);
}

.trigger-icon { font-size: 28px; margin-bottom: 14px; }

.trigger-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.trigger-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin: 0;
}

/* ---------- О НАС ---------- */

.about {
  padding: 90px 0;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.about-inner {
  max-width: 820px;
  text-align: center;
}

.about-mission {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 26px;
}

.about-slogan {
  color: var(--color-accent);
  font-size: 19px;
  font-weight: 700;
  font-style: italic;
  margin: 0;
}

/* ---------- УСЛУГИ ---------- */

.services { padding: 100px 0; }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card);
  border-color: rgba(0, 180, 216, 0.35);
}

.service-icon {
  font-size: 34px;
  margin-bottom: 20px;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
}

.service-card h3 {
  font-size: 21px;
  margin-bottom: 14px;
}

.service-card p {
  color: var(--color-text-muted);
  font-size: 15px;
  margin: 0 0 14px;
}

.service-accent {
  color: var(--color-accent) !important;
  font-size: 14px !important;
  font-weight: 600;
  margin: 0 !important;
}

/* ---------- ПРОЕКТЫ ---------- */

.projects {
  padding: 100px 0;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card);
  border-color: rgba(0, 180, 216, 0.35);
}

.project-thumb {
  height: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, #16243f, #0d1a30 60%, #0a1628);
  color: var(--color-text-dim);
  position: relative;
}

.project-thumb::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(0, 180, 216, 0.16), transparent 60%);
}

.project-thumb-icon {
  font-size: 40px;
  opacity: 0.7;
  position: relative;
}

.project-thumb-label {
  font-size: 13px;
  letter-spacing: 0.04em;
  position: relative;
}

.project-body { padding: 26px 26px 28px; }

.project-body h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.project-desc {
  color: var(--color-text-muted);
  font-size: 14px;
  margin: 0 0 14px;
}

.project-time {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-badge {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 4px 11px;
}

/* ---------- ПРЕИМУЩЕСТВА ---------- */

.advantages { padding: 100px 0; }

.advantages-inner { text-align: center; }

.advantages-list {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: left;
}

.advantages-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  font-size: 16px;
  transition: transform var(--transition), border-color var(--transition);
}

.advantages-list li:hover {
  transform: translateX(4px);
  border-color: rgba(0, 180, 216, 0.35);
}

.check { font-size: 18px; flex-shrink: 0; }

/* ---------- КОНТАКТЫ ---------- */

.contacts {
  padding: 100px 0;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
}

.contacts-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contacts-lead {
  color: var(--color-text-muted);
  font-size: 16px;
  margin-bottom: 34px;
}

.contacts-details {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contacts-details li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 17px;
  font-weight: 600;
}

.contacts-details a { transition: color var(--transition); }
.contacts-details a:hover { color: var(--color-accent); }

.contacts-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-dim);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 34px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
}

.contact-form input,
.contact-form textarea {
  font-family: inherit;
  font-size: 15px;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.15);
}

.contact-form button { margin-top: 6px; }

.form-alert {
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 600;
}

.form-alert-success {
  background: rgba(47, 191, 113, 0.12);
  color: var(--color-success);
  border: 1px solid rgba(47, 191, 113, 0.3);
}

.form-alert-error {
  background: rgba(226, 89, 106, 0.12);
  color: var(--color-error);
  border: 1px solid rgba(226, 89, 106, 0.3);
}

/* ---------- ФУТЕР ---------- */

.site-footer {
  padding: 50px 0 34px;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
  text-align: center;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.footer-brand .logo-icon,
.footer-brand .logo-text {
  display: inline;
}

.footer-tagline {
  color: var(--color-text-dim);
  font-size: 13px;
  margin: 4px 0 0;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 22px;
}

.footer-nav a {
  color: var(--color-text-muted);
  font-size: 14px;
  transition: color var(--transition);
}

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

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-dim);
  font-size: 13px;
}

.footer-policy { transition: color var(--transition); }
.footer-policy:hover { color: var(--color-accent); }

/* ==========================================================================
   Адаптивность
   ========================================================================== */

/* Планшет */
@media (max-width: 1024px) {
  .triggers-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .contacts-inner { grid-template-columns: 1fr; gap: 44px; }
}

/* Мобильное меню */
@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 24px 20px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .main-nav .nav-link {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .header-cta { display: none; }
  .burger { display: flex; }
}

/* Мобильный */
@media (max-width: 640px) {
  .container { padding: 0 18px; }

  .hero { padding: 60px 0 56px; }
  .hero-title { font-size: 30px; }
  .hero-subtitle { font-size: 15px; }

  .triggers-grid { grid-template-columns: 1fr; margin-top: 48px; }
  .services-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }

  .about, .services, .projects, .advantages, .contacts { padding: 64px 0; }

  .section-title { margin-bottom: 30px; }

  .contact-form { padding: 24px; }

  .advantages-list li { padding: 14px 16px; font-size: 15px; }
}