/* Tengri Services — single-page MVP */

:root {
  --bg: #0c1222;
  --bg-elevated: #121a2e;
  --surface: #1a2540;
  --text: #e8edf7;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-dim: rgba(56, 189, 248, 0.15);
  --border: rgba(148, 163, 184, 0.12);
  --radius: 12px;
  --font: "DM Sans", system-ui, sans-serif;
  --max: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

img {
  max-width: 100%;
  height: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 18, 34, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-weight: 700;
  font-size: calc(1.15rem * 1.5);
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.logo span {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  position: relative;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 8px 0;
  transition: color 0.25s ease, transform 0.2s ease;
}
.nav-list a:hover {
  color: var(--accent);
  text-decoration: none;
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    display: none;
    flex-direction: column;
  }
  .nav.is-open {
    display: flex;
  }
  .nav-list {
    flex-direction: column;
    gap: 4px;
  }
  .nav-list a {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
  }
}

/* Sections */
section {
  scroll-margin-top: 80px;
}

.section-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 88px 24px;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
  line-height: 1.2;
}

.section-lead {
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 0 40px;
  font-size: 1.05rem;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -20%, rgba(56, 189, 248, 0.18), transparent 55%);
  pointer-events: none;
  animation: tgr-hero-glow 10s ease-in-out infinite;
}

.hero .section-inner {
  padding-top: 72px;
  padding-bottom: 96px;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--accent-dim);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.25rem, 6vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin: 0 0 20px;
  max-width: 640px;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 520px;
  margin: 0 0 32px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: transform 0.2s ease, box-shadow 0.25s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  color: #0c1222;
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.35);
}
.btn-primary:hover {
  text-decoration: none;
  box-shadow: 0 12px 32px rgba(14, 165, 233, 0.45);
  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);
  text-decoration: none;
  transform: translateY(-2px);
}

/* Cards grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.3s ease, box-shadow 0.35s ease, transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.card:hover {
  border-color: rgba(56, 189, 248, 0.25);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.25);
  transform: translateY(-6px);
}
.card:hover .card-icon {
  animation: tgr-icon-pulse 0.6s ease;
}

.card h3 {
  margin: 0 0 12px;
  font-size: 1.15rem;
  font-weight: 600;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.25rem;
}

/* Airports */
.airport-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.airport-pill {
  padding: 12px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-weight: 500;
  font-size: 0.95rem;
}

/* Form */
.quote-form {
  max-width: 520px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.quote-form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.quote-form input,
.quote-form textarea,
.quote-form select {
  width: 100%;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
}
.quote-form input:focus,
.quote-form textarea:focus,
.quote-form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.quote-form textarea {
  min-height: 120px;
  resize: vertical;
}

.form-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* Contacts */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.contact-block {
  padding: 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.contact-block h3 {
  margin: 0 0 8px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.contact-block p,
.contact-block a {
  margin: 0;
  font-size: 1.05rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer strong {
  color: var(--text);
}

/* ---------- Animations ---------- */

@keyframes tgr-fade-up {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes tgr-header-in {
  from {
    opacity: 0;
    transform: translateY(-14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes tgr-hero-glow {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.72;
  }
}

@keyframes tgr-icon-pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.06);
  }
}

.site-header--in {
  animation: tgr-header-in 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-animate .hero-badge {
  animation: tgr-fade-up 0.75s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-animate h1 {
  animation: tgr-fade-up 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.1s both;
}

.hero-animate > p {
  animation: tgr-fade-up 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.2s both;
}

.hero-animate .hero-cta {
  animation: tgr-fade-up 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.32s both;
}

/* Scroll reveal (html.tgr-js set in <head>; without JS content stays visible) */
html.tgr-js .reveal:not(.is-visible) {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.75s cubic-bezier(0.22, 1, 0.36, 1), transform 0.75s cubic-bezier(0.22, 1, 0.36, 1);
}

html.tgr-js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

html.tgr-js .section-inner.reveal:not(.is-visible) .section-label,
html.tgr-js .section-inner.reveal:not(.is-visible) .section-title,
html.tgr-js .section-inner.reveal:not(.is-visible) .section-lead {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

html.tgr-js .section-inner.reveal.is-visible .section-label,
html.tgr-js .section-inner.reveal.is-visible .section-title,
html.tgr-js .section-inner.reveal.is-visible .section-lead {
  opacity: 1;
  transform: translateY(0);
}

html.tgr-js .section-inner.reveal.is-visible .section-label {
  transition-delay: 0.05s;
}
html.tgr-js .section-inner.reveal.is-visible .section-title {
  transition-delay: 0.12s;
}
html.tgr-js .section-inner.reveal.is-visible .section-lead {
  transition-delay: 0.2s;
}

html.tgr-js .section-inner.reveal:not(.is-visible) .card,
html.tgr-js .section-inner.reveal:not(.is-visible) .airport-pill,
html.tgr-js .section-inner.reveal:not(.is-visible) .quote-form > *,
html.tgr-js .site-footer.reveal:not(.is-visible) {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

html.tgr-js .section-inner.reveal.is-visible .card,
html.tgr-js .section-inner.reveal.is-visible .airport-pill {
  opacity: 1;
  transform: translateY(0);
}

html.tgr-js .section-inner.reveal.is-visible .card:nth-child(1) {
  transition-delay: 0.22s;
}
html.tgr-js .section-inner.reveal.is-visible .card:nth-child(2) {
  transition-delay: 0.3s;
}
html.tgr-js .section-inner.reveal.is-visible .card:nth-child(3) {
  transition-delay: 0.38s;
}
html.tgr-js .section-inner.reveal.is-visible .card:nth-child(4) {
  transition-delay: 0.46s;
}
html.tgr-js .section-inner.reveal.is-visible .card:nth-child(5) {
  transition-delay: 0.54s;
}
html.tgr-js .section-inner.reveal.is-visible .card:nth-child(6) {
  transition-delay: 0.62s;
}

html.tgr-js .section-inner.reveal.is-visible .airport-pill:nth-child(1) {
  transition-delay: 0.22s;
}
html.tgr-js .section-inner.reveal.is-visible .airport-pill:nth-child(2) {
  transition-delay: 0.28s;
}
html.tgr-js .section-inner.reveal.is-visible .airport-pill:nth-child(3) {
  transition-delay: 0.34s;
}
html.tgr-js .section-inner.reveal.is-visible .airport-pill:nth-child(4) {
  transition-delay: 0.4s;
}
html.tgr-js .section-inner.reveal.is-visible .airport-pill:nth-child(5) {
  transition-delay: 0.46s;
}
html.tgr-js .section-inner.reveal.is-visible .airport-pill:nth-child(6) {
  transition-delay: 0.52s;
}
html.tgr-js .section-inner.reveal.is-visible .airport-pill:nth-child(7) {
  transition-delay: 0.58s;
}
html.tgr-js .section-inner.reveal.is-visible .airport-pill:nth-child(8) {
  transition-delay: 0.64s;
}

html.tgr-js .section-inner.reveal.is-visible .quote-form > div:nth-child(1) {
  transition-delay: 0.22s;
}
html.tgr-js .section-inner.reveal.is-visible .quote-form > div:nth-child(2) {
  transition-delay: 0.28s;
}
html.tgr-js .section-inner.reveal.is-visible .quote-form > div:nth-child(3) {
  transition-delay: 0.34s;
}
html.tgr-js .section-inner.reveal.is-visible .quote-form > div:nth-child(4) {
  transition-delay: 0.4s;
}
html.tgr-js .section-inner.reveal.is-visible .quote-form > div:nth-child(5) {
  transition-delay: 0.46s;
}
html.tgr-js .section-inner.reveal.is-visible .quote-form > button {
  transition-delay: 0.52s;
}
html.tgr-js .section-inner.reveal.is-visible .quote-form > .form-note {
  transition-delay: 0.58s;
}

html.tgr-js .section-inner.reveal.is-visible .quote-form > *,
html.tgr-js .section-inner.reveal.is-visible .quote-form button {
  opacity: 1;
  transform: translateY(0);
}

html.tgr-js .site-footer.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

html.tgr-js .section-inner.reveal.is-visible .contact-block {
  opacity: 1;
  transform: translateY(0);
}

html.tgr-js .section-inner.reveal:not(.is-visible) .contact-block {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

html.tgr-js .section-inner.reveal.is-visible .contact-block:nth-child(1) {
  transition-delay: 0.18s;
}
html.tgr-js .section-inner.reveal.is-visible .contact-block:nth-child(2) {
  transition-delay: 0.28s;
}
html.tgr-js .section-inner.reveal.is-visible .contact-block:nth-child(3) {
  transition-delay: 0.38s;
}

.airport-pill {
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}
.airport-pill:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.35);
}

@media (prefers-reduced-motion: reduce) {
  .site-header--in,
  .hero::before,
  .hero-animate .hero-badge,
  .hero-animate h1,
  .hero-animate > p,
  .hero-animate .hero-cta {
    animation: none !important;
  }

  .hero::before {
    opacity: 1;
  }

  .reveal,
  .reveal.is-visible {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .section-inner.reveal .section-label,
  .section-inner.reveal .section-title,
  .section-inner.reveal .section-lead,
  .section-inner.reveal .card,
  .section-inner.reveal .airport-pill,
  .section-inner.reveal .quote-form > *,
  .section-inner.reveal .contact-block,
  .site-footer.reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .card:hover {
    transform: none;
  }

  .nav-list a:hover,
  .btn-primary:hover,
  .btn-ghost:hover {
    transform: none;
  }
}