/* Skyline Flight Drones — premium marketing styles
   Palette: deep sky blues, clean whites, amber/gold accent
   Offline-friendly: no external fonts or image URLs */

:root {
  --sky-950: #0a1628;
  --sky-900: #0f2744;
  --sky-800: #163a5f;
  --sky-700: #1e4d7b;
  --sky-600: #2a6aa3;
  --sky-100: #e8f1f8;
  --sky-50: #f5f9fc;
  --white: #ffffff;
  --ink: #0f1c2e;
  --ink-muted: #4a5d73;
  --amber: #c9a227;
  --amber-soft: #e8c96a;
  --amber-deep: #a8841a;
  --border: rgba(15, 39, 68, 0.1);
  --shadow: 0 12px 40px rgba(10, 22, 40, 0.12);
  --radius: 14px;
  --radius-sm: 10px;
  --header-h: 72px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max: 1100px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--sky-700);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--sky-900); }

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--sky-900);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.logo:hover { color: var(--sky-800); }
.logo-mark { color: var(--amber); }
.logo-text { font-size: 1.05rem; white-space: nowrap; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.site-nav a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}
.site-nav a:hover { color: var(--sky-900); }
.site-nav .btn { color: var(--white); }
.site-nav .btn:hover { color: var(--white); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: none;
  background: transparent;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--sky-900);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 0.55rem 1.1rem; font-size: 0.875rem; }
.btn-block { width: 100%; }

.btn-primary {
  background: linear-gradient(135deg, var(--amber) 0%, var(--amber-deep) 100%);
  color: var(--sky-950);
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(201, 162, 39, 0.35);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--amber-soft) 0%, var(--amber) 100%);
  color: var(--sky-950);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.45);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.7);
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: clamp(420px, 78vh, 640px);
  display: flex;
  align-items: center;
  color: var(--white);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(42, 106, 163, 0.55) 0%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 15% 80%, rgba(201, 162, 39, 0.18) 0%, transparent 50%),
    linear-gradient(165deg, var(--sky-950) 0%, var(--sky-900) 40%, var(--sky-800) 75%, #1a4a72 100%);
}
.hero-skyline {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 28%;
  min-height: 100px;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-block: 4.5rem 5rem;
  max-width: 38rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0 1.25rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--amber-soft);
  background: rgba(201, 162, 39, 0.12);
  border: 1px solid rgba(201, 162, 39, 0.35);
  border-radius: 999px;
}
.badge-note {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  opacity: 0.7;
  font-size: 0.75rem;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.15rem, 5vw, 3.25rem);
  font-weight: 750;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hero-sub {
  margin: 0 0 2rem;
  font-size: 1.125rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.85);
  max-width: 34rem;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* —— Sections —— */
.section {
  padding: clamp(3.5rem, 8vw, 5.5rem) 0;
}
.section-alt {
  background: var(--sky-50);
}

.section-header {
  max-width: 36rem;
  margin-bottom: 2.75rem;
}
.section-header.centered,
.section-header:has(+ .portfolio-grid),
.section-header:has(+ .cards),
.section-header:has(+ .testimonial-grid) {
  /* keep left-aligned for premium feel */
}

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber-deep);
}

.section h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.65rem, 3.5vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--sky-950);
  line-height: 1.25;
}

.section-lead {
  margin: 0;
  color: var(--ink-muted);
  font-size: 1.05rem;
}

/* —— Service cards —— */
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.6rem;
  box-shadow: 0 4px 20px rgba(10, 22, 40, 0.04);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.card:hover {
  border-color: rgba(42, 106, 163, 0.25);
  box-shadow: var(--shadow);
}
.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.1rem;
  color: var(--sky-700);
  background: var(--sky-100);
  border-radius: 12px;
}
.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--sky-950);
  letter-spacing: -0.015em;
}
.card p {
  margin: 0;
  font-size: 0.975rem;
  color: var(--ink-muted);
}

/* —— Portfolio —— */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.portfolio-item {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  border: 1px solid var(--border);
}

.portfolio-label {
  position: relative;
  z-index: 1;
  margin: 0.85rem;
  padding: 0.3rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(10, 22, 40, 0.45);
  backdrop-filter: blur(6px);
  border-radius: 6px;
}

/* Abstract CSS art — sky / architecture feel, no network deps */
.art-1 {
  background:
    linear-gradient(180deg, transparent 45%, rgba(10, 22, 40, 0.35) 100%),
    linear-gradient(135deg, #1a4a72 0%, #2a6aa3 40%, #7eb6d9 70%, #c9a227 100%);
}
.art-1::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 20%, rgba(255,255,255,0.08) 21%, transparent 22%),
    linear-gradient(90deg, transparent 55%, rgba(255,255,255,0.06) 56%, transparent 58%),
    linear-gradient(0deg, rgba(10,22,40,0.5) 0%, transparent 40%);
  clip-path: polygon(0 70%, 15% 45%, 28% 55%, 40% 35%, 55% 50%, 70% 25%, 85% 40%, 100% 20%, 100% 100%, 0 100%);
}

.art-2 {
  background:
    radial-gradient(ellipse at 70% 30%, rgba(232, 201, 106, 0.4) 0%, transparent 45%),
    linear-gradient(160deg, #0f2744 0%, #163a5f 50%, #3d7ab0 100%);
}
.art-2::after {
  content: "";
  position: absolute;
  bottom: 0; left: 10%; right: 10%;
  height: 42%;
  background: linear-gradient(180deg, #1e4d7b, #0a1628);
  clip-path: polygon(5% 100%, 10% 30%, 25% 55%, 40% 20%, 55% 45%, 70% 15%, 85% 40%, 95% 100%);
  opacity: 0.85;
}

.art-3 {
  background:
    linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.05) 50%, transparent 60%),
    linear-gradient(200deg, #2a6aa3 0%, #0f2744 60%, #0a1628 100%);
}
.art-3::before {
  content: "";
  position: absolute;
  width: 55%; height: 55%;
  right: -5%; top: 10%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201,162,39,0.35), transparent 70%);
}

.art-4 {
  background:
    repeating-linear-gradient(-12deg, transparent, transparent 18px, rgba(255,255,255,0.03) 18px, rgba(255,255,255,0.03) 19px),
    linear-gradient(125deg, #163a5f 0%, #1e4d7b 45%, #e8c96a 120%);
}
.art-4::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 35%;
  background: rgba(10, 22, 40, 0.4);
  clip-path: polygon(0 60%, 20% 0, 35% 40%, 50% 10%, 65% 50%, 80% 5%, 100% 35%, 100% 100%, 0 100%);
}

.art-5 {
  background:
    radial-gradient(circle at 30% 70%, rgba(126, 182, 217, 0.35) 0%, transparent 40%),
    linear-gradient(180deg, #7eb6d9 0%, #2a6aa3 40%, #0f2744 100%);
}
.art-5::before {
  content: "";
  position: absolute;
  left: 20%; bottom: 18%;
  width: 60%; height: 28%;
  background: rgba(10, 22, 40, 0.55);
  clip-path: polygon(0 100%, 8% 40%, 22% 70%, 40% 20%, 58% 55%, 75% 15%, 90% 45%, 100% 100%);
}

.art-6 {
  background:
    linear-gradient(210deg, #c9a227 0%, #a8841a 15%, #1e4d7b 55%, #0a1628 100%);
}
.art-6::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(255,255,255,0.15) 0%, transparent 35%),
    linear-gradient(0deg, rgba(10,22,40,0.5) 0%, transparent 50%);
}

/* —— Why us —— */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}
.why-intro { margin-bottom: 0; }

.why-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.why-list li {
  padding: 1.15rem 1.35rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--amber);
}
.why-list strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--sky-950);
  font-size: 1.05rem;
}
.why-list span {
  color: var(--ink-muted);
  font-size: 0.95rem;
}

/* —— About —— */
.about-block {
  max-width: 40rem;
}
.about-text {
  margin: 1rem 0 0;
  font-size: 1.1rem;
  color: var(--ink-muted);
  line-height: 1.7;
}

/* —— Testimonials (placeholders) —— */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}
.testimonial {
  margin: 0;
  padding: 1.75rem;
  background: var(--sky-50);
  border-radius: var(--radius);
  border: 1px dashed rgba(42, 106, 163, 0.35);
}
.testimonial p {
  margin: 0 0 1rem;
  font-size: 1.05rem;
  color: var(--ink);
  font-style: italic;
}
.testimonial footer {
  font-size: 0.875rem;
  color: var(--ink-muted);
  font-style: normal;
}
.placeholder-tag {
  display: inline-block;
  margin-left: 0.35rem;
  padding: 0.1rem 0.45rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--amber-deep);
  background: rgba(201, 162, 39, 0.15);
  border-radius: 4px;
  vertical-align: middle;
}

/* —— Contact —— */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-details {
  list-style: none;
  margin: 1.75rem 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contact-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.15rem;
}
.contact-details a {
  font-weight: 600;
  text-decoration: none;
  color: var(--sky-800);
}
.contact-details a:hover { text-decoration: underline; }
.hint {
  font-style: normal;
  font-size: 0.85rem;
  color: var(--ink-muted);
  opacity: 0.8;
}

.form-note {
  font-size: 0.9rem;
  color: var(--ink-muted);
  padding: 0.9rem 1rem;
  background: rgba(201, 162, 39, 0.08);
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.field {
  margin-bottom: 1.15rem;
}
.field label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--sky-900);
}
.field input,
.field textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--ink);
  background: var(--sky-50);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--sky-600);
  box-shadow: 0 0 0 3px rgba(42, 106, 163, 0.2);
  background: var(--white);
}
.field textarea { resize: vertical; min-height: 110px; }

.form-hint {
  margin: 0.85rem 0 0;
  font-size: 0.8rem;
  color: var(--ink-muted);
  text-align: center;
}

/* —— Footer —— */
.site-footer {
  background: var(--sky-950);
  color: rgba(255, 255, 255, 0.7);
  padding: 2.5rem 0;
  font-size: 0.9rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.footer-brand strong {
  color: var(--white);
  font-size: 1rem;
}
.footer-brand span { color: var(--amber-soft); font-size: 0.85rem; }
.footer-copy { margin: 0; }
.footer-nav {
  display: flex;
  gap: 1.25rem;
}
.footer-nav a {
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  font-weight: 500;
}
.footer-nav a:hover { color: var(--amber-soft); }

/* —— Responsive —— */
@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .portfolio-grid { grid-template-columns: 1fr 1fr; }
  .why-grid,
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .testimonial-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem 1.25rem 1.25rem;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s, opacity 0.25s;
  }
  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .site-nav a {
    padding: 0.85rem 0.5rem;
    border-bottom: 1px solid var(--border);
  }
  .site-nav .btn {
    margin-top: 0.75rem;
    text-align: center;
    border-bottom: none;
  }

  .cards { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .hero-content { padding-block: 3.5rem 4rem; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}