/* ============================================================
   DELMARVA DRONE SERVICES — style.css
   Design system: coastal night palette, aviation typography
   ============================================================ */

/* ─── TOKENS ─────────────────────────────────────────────── */
:root {
  --bg:         #0A0F1E;
  --surface:    #111827;
  --surface-2:  #1B2B4B;
  --accent:     #4A90D9;
  --amber:      #F5A623;
  --text:       #E8E4D9;
  --text-muted: #8A9BB5;
  --border:     rgba(74, 144, 217, 0.18);

  --ff-display: 'Bebas Neue', sans-serif;
  --ff-body:    'Inter', sans-serif;
  --ff-mono:    'Space Mono', monospace;

  --nav-h: 72px;
  --max-w: 1200px;
  --gap:   clamp(1.5rem, 4vw, 3rem);
}

/* ─── RESET ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--ff-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ─── UTILITIES ──────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2.5rem);
}

.mono { font-family: var(--ff-mono); font-size: 0.75rem; letter-spacing: 0.08em; }

.eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.72rem;
  margin-bottom: 0.75rem;
}

.section {
  padding-block: clamp(4rem, 8vw, 7rem);
}

.section-header {
  margin-bottom: 3rem;
}

.section-header h2 {
  font-family: var(--ff-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: 0.04em;
  line-height: 1;
}

/* ─── BUTTONS ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: all 0.2s ease;
  font-weight: 700;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}
.btn-primary:hover {
  background: var(--amber);
  transform: translateY(-1px);
}

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

.btn-lg { padding: 1rem 2.25rem; font-size: 0.85rem; }
.btn-full { width: 100%; justify-content: center; }

/* ─── NAV ────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: clamp(1rem, 5vw, 2.5rem);
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text);
}

.logo-mark {
  color: var(--accent);
  font-size: 1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.nav-cta {
  padding: 0.5rem 1.25rem;
  background: var(--accent);
  color: var(--bg) !important;
  border-radius: 2px;
  font-weight: 700;
}
.nav-cta:hover { background: var(--amber) !important; }
.nav-cta.active { background: var(--amber) !important; color: var(--bg) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  transition: all 0.2s;
}

/* ─── HERO ───────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-h);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 30%, rgba(27, 43, 75, 0.7) 0%, transparent 70%),
    linear-gradient(180deg, #0A0F1E 0%, #0d1628 60%, #0A0F1E 100%);
}

/* Signature: the amber horizon line */
.horizon-line {
  position: absolute;
  left: 0; right: 0;
  top: 62%;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(245, 166, 35, 0.15) 10%,
    rgba(245, 166, 35, 0.6) 40%,
    rgba(245, 166, 35, 0.6) 60%,
    rgba(245, 166, 35, 0.15) 90%,
    transparent 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2.5rem);
  padding-block: 5rem 8rem;
}

.hero-eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.72rem;
  margin-bottom: 1.25rem;
}

.hero-headline {
  font-family: var(--ff-display);
  font-size: clamp(4rem, 12vw, 10rem);
  line-height: 0.92;
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.bracket-left, .bracket-right {
  color: var(--accent);
  opacity: 0.5;
}

/* Animated altitude bracket effect */
.bracket-left, .bracket-right {
  display: inline-block;
  animation: bracket-pulse 3s ease-in-out infinite;
}
.bracket-right { animation-delay: 1.5s; }

@keyframes bracket-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.9; }
}

.hero-sub {
  max-width: 580px;
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-num {
  font-family: var(--ff-display);
  font-size: 1.35rem;
  letter-spacing: 0.06em;
  color: var(--text);
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.65rem;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scroll-drop 2s ease-in-out infinite;
}

@keyframes scroll-drop {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ─── SERVICES ───────────────────────────────────────────── */
.services {
  background: var(--surface);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 1.5px;
  background: var(--border);
  border: 1px solid var(--border);
}

.service-card {
  background: var(--surface);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: background 0.2s;
}

.service-card:hover { background: var(--surface-2); }

.service-icon {
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1;
}

.service-card h3 {
  font-family: var(--ff-display);
  font-size: 1.5rem;
  letter-spacing: 0.04em;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}

.service-list li {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-left: 1rem;
  position: relative;
}

.service-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.service-link {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-top: auto;
  transition: color 0.2s, gap 0.2s;
}

.service-link:hover { color: var(--amber); }

/* ─── WHY US ─────────────────────────────────────────────── */
.why-us {
  background: var(--bg);
}

.why-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: start;
}

.why-text h2 {
  font-family: var(--ff-display);
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  line-height: 1;
  letter-spacing: 0.04em;
  margin-bottom: 1.25rem;
}

.why-body {
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 2.5rem;
  font-size: 0.98rem;
}

.why-pillars {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.pillar {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
}

.pillar:last-child { border-bottom: none; padding-bottom: 0; }

.pillar-icon {
  color: var(--accent);
  font-size: 0.85rem;
  margin-top: 0.2rem;
  flex-shrink: 0;
}

.pillar h4 {
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.pillar p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ─── COVERAGE ───────────────────────────────────────────── */
.coverage {
  background: var(--surface);
}

.coverage-sub {
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 3rem;
  line-height: 1.7;
}

.coverage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.coverage-region {
  padding: 2rem;
  border: 1px solid var(--border);
}

.coverage-region h4 {
  font-family: var(--ff-display);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.coverage-region li {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding-block: 0.3rem;
  border-bottom: 1px solid rgba(74, 144, 217, 0.08);
}

.coverage-region li:last-child { border-bottom: none; }

.coverage-region em { color: var(--text-muted); font-style: italic; font-size: 0.8rem; }

.coverage-note {
  color: var(--text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  border-left: 2px solid var(--accent);
  padding-left: 1rem;
}

/* ─── CTA BAND ───────────────────────────────────────────── */
.cta-band {
  background: var(--surface-2);
  padding-block: 5rem;
  text-align: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.cta-band h2 {
  font-family: var(--ff-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}

.cta-band p {
  color: var(--text-muted);
  margin-bottom: 2rem;
  font-size: 1rem;
}

/* ─── FOOTER ─────────────────────────────────────────────── */
.footer {
  background: #06090F;
  padding-top: 4rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
}

.footer-brand .nav-logo {
  margin-bottom: 1rem;
  display: inline-flex;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.6;
  max-width: 280px;
}

.footer-links h5,
.footer-contact h5 {
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.88rem;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }

.footer-contact p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 0.4rem;
}

.footer-contact a { color: var(--accent); }
.footer-contact a:hover { color: var(--amber); }

.footer-bottom {
  padding-block: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

/* ─── PAGE HERO (interior pages) ────────────────────────── */
.page-hero {
  position: relative;
  padding-top: var(--nav-h);
  background: linear-gradient(180deg, #0d1628 0%, var(--bg) 100%);
  overflow: hidden;
}

.page-hero--sm {
  padding-block: calc(var(--nav-h) + 3rem) 4rem;
}

.page-hero .horizon-line { top: 85%; }

.page-hero .container { position: relative; z-index: 2; }

.page-hero h1 {
  font-family: var(--ff-display);
  font-size: clamp(3rem, 8vw, 6rem);
  letter-spacing: 0.04em;
  line-height: 1;
  margin-bottom: 1.25rem;
}

.page-sub {
  color: var(--text-muted);
  max-width: 560px;
  font-size: 0.98rem;
  line-height: 1.7;
}

/* ─── GALLERY ────────────────────────────────────────────── */
.gallery-filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.filter-btn {
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 2px;
  transition: all 0.2s;
}

.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active { background: var(--accent); border-color: var(--accent); color: var(--bg); }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-bottom: 3rem;
}

.gallery-item {
  background: var(--surface);
  aspect-ratio: 4 / 3;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s;
}

.gallery-item--wide {
  grid-column: span 2;
  aspect-ratio: 16 / 9;
}

.gallery-item:hover .gallery-placeholder { opacity: 0.7; }

.gallery-placeholder {
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: linear-gradient(135deg, var(--surface) 0%, var(--surface-2) 100%);
  color: var(--text-muted);
  transition: opacity 0.3s;
  padding: 1rem;
  text-align: center;
}

.gallery-icon {
  font-size: 2rem;
  color: var(--accent);
  opacity: 0.4;
}

.gallery-hint {
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  color: var(--accent);
  opacity: 0.5;
}

.gallery-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 1rem;
  background: linear-gradient(to top, rgba(10,15,30,0.95), transparent);
  transform: translateY(100%);
  transition: transform 0.3s;
}

.gallery-item:hover .gallery-caption { transform: translateY(0); }

.caption-tag {
  color: var(--accent);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  display: block;
  margin-bottom: 0.25rem;
}

.gallery-caption p {
  font-size: 0.85rem;
  color: var(--text);
}

.gallery-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.gallery-note a { color: var(--accent); }
.gallery-note a:hover { color: var(--amber); }

/* ─── GALLERY HIDDEN STATE ───────────────────────────────── */
.gallery-item.hidden { display: none; }

/* ─── CONTACT ────────────────────────────────────────────── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 4rem;
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.75rem 1rem;
  font-family: var(--ff-body);
  font-size: 0.92rem;
  border-radius: 2px;
  transition: border-color 0.2s;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.5;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%234A90D9' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-group select option { background: var(--surface); }

.form-check {
  flex-direction: row;
  align-items: center;
  gap: 0.75rem;
}

.form-check input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  accent-color: var(--accent);
}

.form-check label {
  text-transform: none;
  letter-spacing: 0;
  font-family: var(--ff-body);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.form-note {
  color: var(--text-muted);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-align: center;
}

.form-note a { color: var(--accent); }

/* Form success state */
.form-success {
  text-align: center;
  padding: 4rem 2rem;
  border: 1px solid var(--border);
}

.success-icon {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.form-success h3 {
  font-family: var(--ff-display);
  font-size: 2rem;
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
}

.form-success p {
  color: var(--text-muted);
  line-height: 1.7;
}

/* Sidebar */
.contact-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: sticky;
  top: calc(var(--nav-h) + 2rem);
}

.sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2rem;
}

.sidebar-card--accent {
  border-color: rgba(74, 144, 217, 0.35);
  background: linear-gradient(135deg, var(--surface) 0%, rgba(27, 43, 75, 0.6) 100%);
}

.sidebar-card h4 {
  font-family: var(--ff-display);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  margin-bottom: 1.25rem;
}

.sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sidebar-list li { border-bottom: 1px solid var(--border); padding-bottom: 1.25rem; }
.sidebar-list li:last-child { border-bottom: none; padding-bottom: 0; }

.sidebar-label {
  display: block;
  color: var(--accent);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  margin-bottom: 0.35rem;
}

.sidebar-list p {
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.6;
}

.sidebar-card--accent p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 1rem;
}

.sidebar-email {
  display: block;
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  color: var(--accent);
  word-break: break-all;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}

.sidebar-email:hover { border-color: var(--accent); }

/* ─── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .why-inner,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .contact-sidebar {
    position: static;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .gallery-item--wide {
    grid-column: span 1;
    aspect-ratio: 4 / 3;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(10, 15, 30, 0.97);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open { display: flex; }

  .nav-links a { font-size: 0.85rem; }

  .nav-toggle { display: flex; }

  .hero-headline { font-size: clamp(3rem, 16vw, 6rem); }

  .hero-stats { gap: 1rem; }

  .stat-divider { display: none; }

  .form-row { grid-template-columns: 1fr; }

  .footer-inner { grid-template-columns: 1fr; }

  .footer-brand { grid-column: 1; }

  .gallery-grid { grid-template-columns: 1fr; background: none; border: none; gap: 1rem; }

  .gallery-item { border: 1px solid var(--border); }

  .gallery-caption { transform: translateY(0); }
}

/* ─── REDUCED MOTION ─────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}