:root {
  --bg: #0e1218;
  --bg-soft: #151b24;
  --bg-card: #1b2330;
  --text: #e8ecf1;
  --text-dim: #9aa7b8;
  --accent: #00a1df;
  --accent-dark: #0086bb;
  --accent-rgb: 0, 161, 223;
  --header-bg: rgba(14, 18, 24, 0.85);
  --border: rgba(255, 255, 255, 0.08);
  --radius: 14px;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #f2f6fa;
  --bg-soft: #e6edf3;
  --bg-card: #ffffff;
  --text: #19232e;
  --text-dim: #5b6b7b;
  --accent: #0086bb;
  --accent-dark: #00709e;
  --accent-rgb: 0, 134, 187;
  --header-bg: rgba(242, 246, 250, 0.88);
  --border: rgba(18, 40, 60, 0.14);
  --shadow: 0 12px 28px rgba(24, 60, 90, 0.18);
  color-scheme: light;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Manrope", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

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

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

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  box-shadow: 0 8px 22px rgba(var(--accent-rgb), 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

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

.btn--block {
  display: block;
  width: 100%;
}

/* ---------- Header ---------- */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
}

.header__left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--accent);
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.back-btn:hover {
  border-color: var(--accent);
  transform: translateX(-2px);
}
.back-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 300;
  letter-spacing: 0.4px;
}

.logo__img {
  height: 40px;
  width: auto;
  display: block;
}

.logo--footer .logo__img {
  height: 52px;
}

.nav {
  display: flex;
  gap: 26px;
}

.nav a {
  font-size: 15px;
  color: var(--text-dim);
  transition: color 0.2s ease;
}

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

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.burger span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  padding: 0;
  color: var(--accent);
  transition: border-color 0.2s ease, transform 0.15s ease;
}

.theme-toggle:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.theme-toggle svg {
  width: 19px;
  height: 19px;
}

.theme-toggle .icon-sun {
  display: none;
}

.theme-toggle .icon-moon {
  display: block;
}

[data-theme="light"] .theme-toggle .icon-sun {
  display: block;
}

[data-theme="light"] .theme-toggle .icon-moon {
  display: none;
}

body,
.header,
section,
.footer {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

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

.burger.open span:nth-child(2) {
  opacity: 0;
}

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

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

.hero {
  position: relative;
  overflow: hidden;
  padding: 110px 0 80px;
  background:
    radial-gradient(700px 380px at 85% 15%, rgba(var(--accent-rgb), 0.16), transparent 65%),
    radial-gradient(600px 400px at 5% 90%, rgba(var(--accent-rgb), 0.10), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--border);
  color: #f0f7fc;
}

.hero__carousel,
.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__overlay {
  background: linear-gradient(
    to bottom,
    rgba(10, 14, 23, 0.62) 0%,
    rgba(10, 14, 23, 0.55) 50%,
    rgba(10, 14, 23, 0.78) 100%
  );
}

.hero__slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.hero__slide.is-active {
  opacity: 1;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero__content {
  max-width: 680px;
}

.hero__tagline {
  display: inline-block;
  padding: 14px 26px;
  border: 1px solid rgba(var(--accent-rgb), 0.5);
  border-radius: 999px;
  color: var(--accent);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  margin-bottom: 22px;
}

.hero h1 {
  font-size: 44px;
  line-height: 1.12;
  font-weight: 700;
  margin-bottom: 18px;
}

.hero__subtitle {
  font-size: 18px;
  color: rgba(240, 247, 252, 0.82);
  margin-bottom: 30px;
  max-width: none;
  text-align: left;
}

.hero .btn--ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}

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

.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 70px;
}

.stat {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 18px;
}

.stat__num {
  display: block;
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
}

.stat__label {
  color: var(--text-dim);
  font-size: 13px;
}

/* ---------- Sections common ---------- */

section {
  padding: 80px 0;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}

.section-title--left {
  text-align: left;
}

.section-subtitle {
  text-align: center;
  color: var(--text-dim);
  margin-bottom: 44px;
}

/* ---------- Features ---------- */

.features {
  background: var(--bg);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--accent-rgb), 0.5);
}

.feature__icon {
  font-size: 30px;
  margin-bottom: 14px;
}

.feature h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.feature p {
  color: var(--text-dim);
  font-size: 14.5px;
}

/* ---------- Catalog ---------- */

.catalog {
  background: var(--bg-soft);
}

.catalog__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg);
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.card:hover .card__media img {
  transform: scale(1.04);
}

.card__body {
  padding: 18px 20px 22px;
}

.card__body h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.card__body p {
  color: var(--text-dim);
  font-size: 14px;
}

/* ---------- Areas ---------- */

.areas {
  background: var(--bg);
}

.areas__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: repeat(4, 1fr);
  aspect-ratio: 1 / 1;
  gap: 14px;
  max-width: none;
}

.area {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.area:hover {
  transform: translateY(-3px);
  border-color: rgba(var(--accent-rgb), 0.5);
}

.area:nth-child(1) { grid-column: 1 / span 3; grid-row: 1; }
.area:nth-child(2) { grid-column: 4 / span 3; grid-row: 1; }
.area:nth-child(3) { grid-column: 1 / span 4; grid-row: 4; }
.area:nth-child(4) { grid-column: 7 / span 4; grid-row: 1; }
.area:nth-child(5) { grid-column: 1 / span 4; grid-row: 2; }
.area:nth-child(6) { grid-column: 11 / span 2; grid-row: 1; }
.area:nth-child(7) { grid-column: 5 / span 4; grid-row: 2; }
.area:nth-child(8) { grid-column: 9 / span 2; grid-row: 2; }
.area:nth-child(9) { grid-column: 1 / span 4; grid-row: 3; }
.area:nth-child(10) { grid-column: 5 / span 4; grid-row: 3; }
.area:nth-child(11) { grid-column: 9 / span 4; grid-row: 3; }
.area:nth-child(12) { grid-column: 11 / span 2; grid-row: 2; }
.area:nth-child(13) { grid-column: 5 / span 4; grid-row: 4; }
.area:nth-child(14) { grid-column: 9 / span 4; grid-row: 4; }

.area__media {
  flex: 1;
  position: relative;
  background:
    radial-gradient(80px 80px at 50% 45%, rgba(var(--accent-rgb), 0.18), transparent 70%),
    var(--bg-soft);
}

.area__media::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(45deg, transparent 0 12px, rgba(var(--accent-rgb), 0.05) 12px 13px),
    repeating-linear-gradient(-45deg, transparent 0 12px, rgba(var(--accent-rgb), 0.05) 12px 13px);
}

.area__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.area__desc {
  position: absolute;
  inset: 0;
  z-index: 1;
  margin: 0;
  display: flex;
  align-items: flex-end;
  padding: 12px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
  color: #fff;
  background: linear-gradient(to top, rgba(10, 14, 23, 0.85) 0%, rgba(10, 14, 23, 0.35) 45%, rgba(10, 14, 23, 0) 100%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.area:hover .area__desc {
  opacity: 1;
}

.area__title {
  position: relative;
  z-index: 1;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}

/* ---------- Process ---------- */

.process {
  background: var(--bg-soft);
}

.process__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}

.step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
}

.step__num {
  display: block;
  font-size: 26px;
  font-weight: 800;
  color: var(--accent);
  opacity: 0.85;
  margin-bottom: 12px;
}

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

.step p {
  color: var(--text-dim);
  font-size: 14px;
}

/* ---------- Contact ---------- */

.contact {
  background:
    radial-gradient(640px 340px at 10% 20%, rgba(var(--accent-rgb), 0.12), transparent 60%),
    var(--bg);
}

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

.contact__info p {
  color: var(--text-dim);
  margin: 14px 0 22px;
}

.contact__list {
  list-style: none;
  display: grid;
  gap: 10px;
}

.contact__list li {
  padding-left: 26px;
  position: relative;
  color: var(--text-dim);
}

.contact__list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
}

.form__row {
  margin-bottom: 16px;
}

.form__row label {
  display: block;
  font-size: 13.5px;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.form__row input,
.form__row textarea {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 12px 14px;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s ease;
}

.form__row input:focus,
.form__row textarea:focus {
  border-color: var(--accent);
}

.form__row textarea {
  resize: vertical;
}

.form__note {
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
}

.form__status {
  margin-top: 14px;
  text-align: center;
  font-size: 14px;
  color: var(--accent);
  min-height: 20px;
}

.form__status.error {
  color: #ff5f56;
}

/* ---------- Footer ---------- */

.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 36px 20px;
  flex-wrap: wrap;
}

.footer__brand p {
  color: var(--text-dim);
  font-size: 14px;
  margin-top: 8px;
}

.footer__nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.footer__nav a {
  color: var(--text-dim);
  font-size: 14.5px;
}

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

.footer__bottom {
  border-top: 1px solid var(--border);
  padding: 16px 20px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .features__grid,
  .catalog__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .areas__grid {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(5, 1fr);
  }

  .area {
    grid-column: span 1 !important;
    grid-row: auto !important;
  }

  .process__steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero__stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 640px) {
  .nav {
    position: fixed;
    inset: 68px 0 auto 0;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 10px 20px 20px;
    transform: translateY(-120%);
    transition: transform 0.25s ease;
  }

  .nav.open {
    transform: translateY(0);
  }

  .nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    font-size: 16px;
  }

  .burger {
    display: flex;
  }

  .header__cta {
    display: none;
  }

  .hero {
    padding: 70px 0 60px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero__tagline {
    font-size: 17px;
  }

  .section-title {
    font-size: 26px;
  }

  .features__grid,
  .catalog__grid,
  .process__steps {
    grid-template-columns: 1fr;
  }

  section {
    padding: 56px 0;
  }

  .stat__num {
    font-size: 24px;
  }
}

@media (max-width: 480px) {
  .areas__grid {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(5, 1fr);
  }
}