/* === Variables === */
:root {
  --color-bg: #0f1419;
  --color-bg-section: #1a222d;
  --color-bg-card: #232d3a;
  --color-text: #e8ecf1;
  --color-text-muted: #9ca8b8;
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  --color-border: #2d3a4a;
  --font: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  --container: min(1120px, 100% - 2rem);
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

/* === Reset & Base === */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

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

.container {
  width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

/* === Header === */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 20, 25, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  color: var(--color-text);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.nav {
  display: flex;
  gap: 1.75rem;
  flex-wrap: wrap;
}

.nav a {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav a:hover {
  color: var(--color-text);
  text-decoration: none;
}

/* === Hero === */
.hero {
  padding: 4rem 0 5rem;
  background: linear-gradient(180deg, var(--color-bg-section) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero__title {
  margin: 0 0 0.5rem;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.hero__tagline {
  margin: 0 0 1rem;
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-accent);
}

.hero__desc {
  margin: 0;
  max-width: 640px;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* === Sections === */
.section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--color-border);
}

.section:last-of-type {
  border-bottom: none;
}

.section__title {
  margin: 0 0 1.25rem;
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text);
}

.section__lead {
  margin: 0 0 2rem;
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 720px;
}

/* === Text block === */
.text-block {
  max-width: 800px;
}

.text-block p {
  margin: 0 0 1.25rem;
  color: var(--color-text-muted);
}

.text-block p:last-child {
  margin-bottom: 0;
}

/* === Cards (Services) === */
.cards {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  padding: 1.75rem 2rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card__title {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text);
}

.card p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* === Contacts block === */
.section--contacts {
  background: var(--color-bg-section);
}

.contacts-block {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem 3rem;
  margin-top: 1.5rem;
  padding: 2rem 2.5rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.contact-item__label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.contact-item__value {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}

.contact-item__value:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* === Footer === */
.footer {
  padding: 2rem 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer__copy {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* === Responsive === */
@media (max-width: 768px) {
  .header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .nav {
    gap: 1rem;
  }

  .hero {
    padding: 3rem 0 4rem;
  }

  .section {
    padding: 3rem 0;
  }

  .contacts-block {
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.5rem;
  }
}