/* ==========================================================
   AutoSensor Tech — Shared Stylesheet
   ========================================================== */

/* ---------- CSS Variables ---------- */
:root {
  --primary: #0a1628;
  --primary-light: #0f1f3a;
  --primary-dark: #060e1a;
  --accent: #00d4ff;
  --accent2: #ff6b35;
  --accent-dim: rgba(0,212,255,0.15);
  --accent2-dim: rgba(255,107,53,0.15);
  --text: #e0e6ed;
  --text-muted: #8899aa;
  --text-bright: #ffffff;
  --border: rgba(255,255,255,0.08);
  --border-accent: rgba(0,212,255,0.25);
  --card-bg: rgba(15,31,58,0.7);
  --card-border: rgba(255,255,255,0.06);
  --glass: rgba(10,22,40,0.85);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --max-width: 1200px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--primary);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent2); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1,h2,h3,h4,h5,h6 { line-height: 1.25; color: var(--text-bright); }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
p { margin-bottom: 1rem; }
::selection { background: var(--accent); color: var(--primary); }

/* ---------- Utility ---------- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem; }
.section { padding: 5rem 0; }
.section--alt { background: var(--primary-dark); }
.text-accent { color: var(--accent); }
.text-accent2 { color: var(--accent2); }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.sr-only { position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0; }

/* ---------- Header / Navbar ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: var(--glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem;
  height: 64px;
}
.logo {
  display: flex; align-items: center; gap: 0.6rem;
  font-size: 1.25rem; font-weight: 700; color: var(--text-bright);
  letter-spacing: -0.02em;
}
.logo svg, .logo img { height: 32px; width: auto; }
.logo span { color: var(--accent); }

/* Desktop nav */
.nav { display: flex; align-items: center; gap: 0; }
.nav__list { display: flex; align-items: center; gap: 0; list-style: none; }
.nav__item { position: relative; }
.nav__link {
  display: flex; align-items: center; gap: 0.3rem;
  padding: 0.5rem 1rem; font-size: 0.9rem; font-weight: 500;
  color: var(--text-muted); transition: color var(--transition);
  white-space: nowrap;
}
.nav__link:hover, .nav__link--active { color: var(--text-bright); }
.nav__link::after {
  content: ''; position: absolute; bottom: 0; left: 50%; width: 0; height: 2px;
  background: var(--accent); transition: all var(--transition);
  transform: translateX(-50%);
}
.nav__link:hover::after, .nav__link--active::after { width: 60%; }

/* Dropdown arrow */
.nav__link .arrow {
  display: inline-block; width: 0; height: 0; margin-left: 4px;
  border-left: 4px solid transparent; border-right: 4px solid transparent;
  border-top: 5px solid var(--text-muted); transition: transform var(--transition);
}
.nav__item:hover .arrow { transform: rotate(180deg); border-top-color: var(--accent); }

/* Dropdown */
.dropdown {
  position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  min-width: 220px; padding: 0.5rem 0;
  background: var(--primary-light); border: 1px solid var(--border);
  border-radius: var(--radius-sm); box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  transform: translateX(-50%) translateY(8px);
}
.nav__item:hover .dropdown {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.dropdown__link {
  display: block; padding: 0.55rem 1.25rem; font-size: 0.85rem;
  color: var(--text-muted); transition: all var(--transition);
}
.dropdown__link:hover { color: var(--accent); background: var(--accent-dim); }

/* Hamburger */
.hamburger {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 32px; height: 32px; cursor: pointer; background: none; border: none;
  padding: 4px; z-index: 1001;
}
.hamburger span {
  display: block; width: 100%; height: 2px; background: var(--text);
  transition: all var(--transition); border-radius: 2px;
}
.hamburger--open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger--open span:nth-child(2) { opacity: 0; }
.hamburger--open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav overlay */
.mobile-nav {
  display: none; position: fixed; inset: 0; z-index: 999;
  background: var(--primary-dark); padding: 80px 1.5rem 2rem;
  flex-direction: column; gap: 0; overflow-y: auto;
  transform: translateX(100%); transition: transform 0.35s ease;
}
.mobile-nav--open { transform: translateX(0); }
.mobile-nav__link {
  display: block; padding: 0.9rem 0; font-size: 1.1rem; font-weight: 500;
  color: var(--text); border-bottom: 1px solid var(--border);
}
.mobile-nav__link:hover { color: var(--accent); }
.mobile-nav__sub { padding-left: 1rem; }
.mobile-nav__sub .mobile-nav__link { font-size: 0.95rem; color: var(--text-muted); }

@media (max-width: 768px) {
  .nav { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: flex; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  justify-content: center; text-align: center; padding: 6rem 1.25rem 4rem;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(0,212,255,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(255,107,53,0.06) 0%, transparent 60%),
              var(--primary);
}
/* Animated grid */
.hero__grid {
  position: absolute; inset: 0; z-index: 1; opacity: 0.07;
  background-image:
    linear-gradient(rgba(0,212,255,0.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.3) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridScroll 20s linear infinite;
}
@keyframes gridScroll { to { background-position: 60px 60px; } }
.hero__content { position: relative; z-index: 2; max-width: 800px; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.35rem 1rem; border-radius: 50px; font-size: 0.8rem; font-weight: 600;
  background: var(--accent-dim); color: var(--accent); border: 1px solid var(--border-accent);
  margin-bottom: 1.5rem; text-transform: uppercase; letter-spacing: 0.08em;
}
.hero__title { margin-bottom: 1.25rem; font-weight: 800; letter-spacing: -0.03em; }
.hero__title .accent { color: var(--accent); }
.hero__title .accent2 { color: var(--accent2); }
.hero__sub {
  font-size: clamp(1rem, 2vw, 1.2rem); color: var(--text-muted);
  max-width: 600px; margin: 0 auto 2.5rem; line-height: 1.8;
}
.hero__actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem; border-radius: var(--radius-sm);
  font-size: 0.95rem; font-weight: 600; border: none; cursor: pointer;
  transition: all var(--transition); text-decoration: none;
}
.btn--primary {
  background: var(--accent); color: var(--primary);
}
.btn--primary:hover { background: #33ddff; color: var(--primary); transform: translateY(-2px); box-shadow: 0 4px 20px rgba(0,212,255,0.3); }
.btn--outline {
  background: transparent; color: var(--accent); border: 1.5px solid var(--accent);
}
.btn--outline:hover { background: var(--accent); color: var(--primary); }
.btn--secondary { background: var(--accent2); color: #fff; }
.btn--secondary:hover { background: #ff8555; color: #fff; transform: translateY(-2px); }
.btn--sm { padding: 0.5rem 1.2rem; font-size: 0.85rem; }

/* ---------- Cards ---------- */
.cards { display: grid; gap: 1.5rem; }
.cards--3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.cards--4 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.cards--2 { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
.card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 2rem; transition: all var(--transition);
  position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-4px); border-color: var(--border-accent); box-shadow: var(--shadow); }
.card__icon {
  width: 48px; height: 48px; display: flex; align-items: center; justify-content: center;
  background: var(--accent-dim); border-radius: 10px; margin-bottom: 1.25rem;
  font-size: 1.5rem;
}
.card__icon--orange { background: var(--accent2-dim); }
.card__tag {
  display: inline-block; padding: 0.2rem 0.7rem; border-radius: 50px;
  font-size: 0.7rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; margin-bottom: 0.75rem;
}
.tag--fpv { background: rgba(0,212,255,0.15); color: var(--accent); }
.tag--defense { background: rgba(255,107,53,0.15); color: var(--accent2); }
.tag--tech { background: rgba(120,80,255,0.15); color: #9b7aff; }
.tag--market { background: rgba(0,200,100,0.15); color: #00c864; }
.card__title { margin-bottom: 0.75rem; font-size: 1.15rem; }
.card__text { color: var(--text-muted); font-size: 0.92rem; }
.card__meta { display: flex; align-items: center; gap: 1rem; margin-top: 1rem; font-size: 0.8rem; color: var(--text-muted); }
.card__date { display: flex; align-items: center; gap: 0.3rem; }

/* ---------- Stats ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; text-align: center; }
.stat__number { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; color: var(--accent); line-height: 1.1; }
.stat__number--orange { color: var(--accent2); }
.stat__label { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.4rem; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; margin: 1.5rem 0; border-radius: var(--radius); border: 1px solid var(--card-border); }
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
thead { background: var(--primary-light); }
th {
  padding: 0.75rem 1rem; text-align: left; font-weight: 600;
  color: var(--accent); border-bottom: 1px solid var(--border); white-space: nowrap;
}
td { padding: 0.65rem 1rem; border-bottom: 1px solid var(--border); color: var(--text-muted); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(0,212,255,0.03); }

/* ---------- Section Headers ---------- */
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header__label {
  display: inline-block; padding: 0.25rem 0.8rem; border-radius: 50px;
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.1em; background: var(--accent-dim); color: var(--accent);
  margin-bottom: 1rem;
}
.section-header__title { margin-bottom: 0.75rem; }
.section-header__text { color: var(--text-muted); max-width: 640px; margin: 0 auto; font-size: 1rem; }

/* ---------- Pipeline (C-UAS architecture) ---------- */
.pipeline {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  margin: 2rem 0; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--card-border);
}
.pipeline__step {
  padding: 1.5rem 1rem; text-align: center; position: relative;
  background: var(--card-bg); border-right: 1px solid var(--card-border);
}
.pipeline__step:last-child { border-right: none; }
.pipeline__step-num {
  width: 36px; height: 36px; border-radius: 50%; display: flex;
  align-items: center; justify-content: center; margin: 0 auto 0.75rem;
  font-weight: 700; font-size: 0.85rem;
}
.pipeline__step:nth-child(1) .pipeline__step-num { background: var(--accent-dim); color: var(--accent); }
.pipeline__step:nth-child(2) .pipeline__step-num { background: rgba(120,80,255,0.15); color: #9b7aff; }
.pipeline__step:nth-child(3) .pipeline__step-num { background: var(--accent2-dim); color: var(--accent2); }
.pipeline__step:nth-child(4) .pipeline__step-num { background: rgba(0,200,100,0.15); color: #00c864; }
.pipeline__step h4 { font-size: 1rem; margin-bottom: 0.3rem; }
.pipeline__step p { font-size: 0.8rem; color: var(--text-muted); }
@media (max-width: 768px) {
  .pipeline { grid-template-columns: 1fr; }
  .pipeline__step { border-right: none; border-bottom: 1px solid var(--card-border); }
  .pipeline__step:last-child { border-bottom: none; }
}

/* ---------- Tabs ---------- */
.tabs { margin: 2rem 0; }
.tabs__nav {
  display: flex; gap: 0; border-bottom: 1px solid var(--border);
  overflow-x: auto; -webkit-overflow-scrolling: touch;
}
.tabs__btn {
  padding: 0.75rem 1.5rem; font-size: 0.9rem; font-weight: 500;
  color: var(--text-muted); background: none; border: none; cursor: pointer;
  white-space: nowrap; border-bottom: 2px solid transparent;
  transition: all var(--transition);
}
.tabs__btn:hover { color: var(--text); }
.tabs__btn--active { color: var(--accent); border-bottom-color: var(--accent); }
.tabs__panel { display: none; padding: 2rem 0; }
.tabs__panel--active { display: block; }

/* ---------- Details/Expandable ---------- */
details {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-sm); margin-bottom: 1rem; overflow: hidden;
}
details[open] { border-color: var(--border-accent); }
summary {
  padding: 1rem 1.25rem; font-weight: 600; cursor: pointer;
  list-style: none; display: flex; align-items: center; gap: 0.75rem;
  transition: background var(--transition);
}
summary:hover { background: rgba(0,212,255,0.04); }
summary::-webkit-details-marker { display: none; }
summary::before {
  content: '▸'; display: inline-block; transition: transform var(--transition);
  color: var(--accent); font-size: 0.85rem;
}
details[open] summary::before { transform: rotate(90deg); }
.details-body { padding: 0 1.25rem 1.25rem; }

/* ---------- Solutions Cards ---------- */
.solution-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius); overflow: hidden; transition: all var(--transition);
}
.solution-card:hover { border-color: var(--border-accent); transform: translateY(-4px); box-shadow: var(--shadow); }
.solution-card__header {
  padding: 1.5rem; border-bottom: 1px solid var(--card-border);
}
.solution-card__price { font-size: 1.4rem; font-weight: 800; color: var(--accent); }
.solution-card__range { font-size: 0.85rem; color: var(--accent2); font-weight: 600; }
.solution-card__body { padding: 1.5rem; }
.solution-card__body ul { margin: 0.5rem 0; }
.solution-card__body li {
  padding: 0.35rem 0; padding-left: 1.25rem; position: relative;
  font-size: 0.9rem; color: var(--text-muted);
}
.solution-card__body li::before {
  content: '›'; position: absolute; left: 0; color: var(--accent); font-weight: 700;
}

/* ---------- Timeline (News) ---------- */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 2px; background: var(--border);
}
.timeline__item { position: relative; margin-bottom: 2rem; }
.timeline__dot {
  position: absolute; left: -2rem; top: 0.4rem; width: 12px; height: 12px;
  border-radius: 50%; background: var(--accent); border: 2px solid var(--primary);
  transform: translateX(-5px);
}

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
@media (max-width: 768px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-info__item { display: flex; gap: 1rem; margin-bottom: 1.5rem; }
.contact-info__icon {
  width: 44px; height: 44px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-dim); border-radius: 10px; font-size: 1.2rem;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.82rem; color: var(--text-muted); padding: 1rem 0;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }

/* ---------- Footer ---------- */
.footer {
  background: var(--primary-dark); border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
}
.footer__grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem;
  margin-bottom: 2rem;
}
.footer__brand p { color: var(--text-muted); font-size: 0.88rem; margin-top: 0.75rem; }
.footer__heading { font-size: 0.85rem; font-weight: 600; color: var(--text-bright); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 1rem; }
.footer__link { display: block; padding: 0.25rem 0; font-size: 0.88rem; color: var(--text-muted); }
.footer__link:hover { color: var(--accent); }
.footer__bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 1.5rem; border-top: 1px solid var(--border);
  font-size: 0.8rem; color: var(--text-muted); flex-wrap: wrap; gap: 0.5rem;
}
@media (max-width: 768px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer__grid { grid-template-columns: 1fr; }
}

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 900;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--accent); color: var(--primary); border: none;
  cursor: pointer; font-size: 1.2rem; font-weight: 700;
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(0,212,255,0.3);
}
.back-to-top--visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: #33ddff; transform: translateY(-2px); }

/* ---------- Page Hero (inner pages) ---------- */
.page-hero {
  padding: 8rem 0 3rem; text-align: center; position: relative; overflow: hidden;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,212,255,0.06) 0%, transparent 60%), var(--primary);
}
.page-hero__title { margin-bottom: 0.75rem; }
.page-hero__text { color: var(--text-muted); max-width: 600px; margin: 0 auto; font-size: 1.05rem; }

/* ---------- News Filter ---------- */
.filter-bar {
  display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 2rem; justify-content: center;
}
.filter-btn {
  padding: 0.4rem 1rem; border-radius: 50px; font-size: 0.82rem; font-weight: 500;
  background: var(--card-bg); color: var(--text-muted); border: 1px solid var(--card-border);
  cursor: pointer; transition: all var(--transition);
}
.filter-btn:hover, .filter-btn--active { background: var(--accent-dim); color: var(--accent); border-color: var(--border-accent); }

/* ---------- FPV type cards ---------- */
.type-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 1.5rem; transition: all var(--transition);
}
.type-card:hover { border-color: var(--border-accent); }
.type-card__header { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; }
.type-card__size {
  width: 48px; height: 48px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.85rem; background: var(--accent-dim); color: var(--accent);
}

/* ---------- Print Styles ---------- */
@media print {
  .header, .hamburger, .mobile-nav, .back-to-top, .footer, .hero__bg, .hero__grid { display: none !important; }
  body { background: #fff; color: #222; }
  .card, details, .solution-card { break-inside: avoid; }
  a { color: #0066cc; }
  .section { padding: 2rem 0; }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--primary-dark); }
::-webkit-scrollbar-thumb { background: rgba(0,212,255,0.2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,212,255,0.4); }