/* =============================================
   DRONE AVIATION — Shared Styles
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&family=Inter:wght@400;500&display=swap');

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:         #0A0C0F;
  --bg-card:    #111418;
  --bg-subtle:  #161A20;
  --border:     rgba(255,255,255,0.08);
  --border-accent: rgba(0,168,255,0.35);
  --blue:       #00A8FF;
  --blue-dim:   rgba(0,168,255,0.12);
  --blue-mid:   rgba(0,168,255,0.22);
  --text:       #E8ECF0;
  --text-muted: #6B7580;
  --text-dim:   #3A4450;
  --radius:     6px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: 1.25rem; font-weight: 500; }

p { color: var(--text-muted); }

a { color: var(--blue); text-decoration: none; }
a:hover { opacity: 0.8; }

/* --- Layout Utilities --- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1.5rem;
}

.section-label::before {
  content: '';
  display: block;
  width: 18px;
  height: 1px;
  background: var(--blue);
}

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,12,15,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.nav-logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 8px var(--blue);
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  transition: color 0.2s;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 1px;
  background: var(--blue);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--blue);
  color: #0A0C0F;
}
.btn-primary:hover {
  background: #29B8FF;
  opacity: 1;
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--border-accent);
  color: var(--blue);
  opacity: 1;
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

/* --- Tags / Badges --- */
.tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.7rem;
  border-radius: 3px;
  background: var(--blue-dim);
  color: var(--blue);
  border: 1px solid var(--border-accent);
}

/* --- Divider line --- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 3rem 0;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  margin-top: 4rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-links { gap: 1.25rem; }
  .nav-links a { font-size: 0.78rem; }
  .section { padding: 4rem 0; }
  h1 { font-size: 2.1rem; }
}

@media (max-width: 560px) {
  .nav-links { display: none; }
  .container { padding: 0 1.25rem; }
}