/* ============================================================
   KopterKraft - Static Site Stylesheet
   Modern, dark aerial/tech design
   ============================================================ */

:root {
  --bg: #070b12;
  --bg-2: #0c1420;
  --panel: #111b2b;
  --panel-2: #16233a;
  --border: #1f3048;
  --text: #e8eef7;
  --text-dim: #9fb0c6;
  --accent: #38bdf8;      /* sky blue */
  --accent-2: #818cf8;    /* indigo */
  --accent-glow: rgba(56, 189, 248, 0.25);
  --radius: 14px;
  --maxw: 1180px;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Navbar ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 18, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.5px;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand img.brand-logo { height: 32px; width: auto; }
.brand span { color: var(--accent); }
.nav-links { display: flex; gap: 26px; align-items: center; }
.nav-links a { color: var(--text-dim); font-size: 0.92rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121f !important;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600;
}
.nav-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.6rem; cursor: pointer; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 120px 0 110px;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 50% at 50% -10%, var(--accent-glow), transparent),
    linear-gradient(180deg, var(--bg-2), var(--bg));
  overflow: hidden;
}
.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  z-index: 1;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(56,189,248,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.06) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 20px;
}
.hero h1 .grad {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  max-width: 640px;
  margin: 0 auto 32px;
  color: var(--text-dim);
  font-size: 1.15rem;
}
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-2px); text-decoration: none; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121f;
  box-shadow: 0 8px 30px var(--accent-glow);
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- Sections ---------- */
.section { padding: 90px 0; }
.section-alt { background: var(--bg-2); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; margin-bottom: 14px; }
.section-head p { color: var(--text-dim); }

/* ---------- Cards / Grid ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}
.card .icon {
  width: 46px; height: 46px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-glow);
  color: var(--accent);
  font-size: 1.4rem;
  margin-bottom: 18px;
}
.card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.card p { color: var(--text-dim); font-size: 0.95rem; }
.card a.card-link { display: inline-block; margin-top: 14px; font-weight: 600; font-size: 0.92rem; }

/* ---------- Works ---------- */
.work-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.work-thumb {
  height: 200px;
  background: linear-gradient(135deg, var(--panel-2), var(--panel));
  display: flex; align-items: center; justify-content: center;
  color: var(--text-dim);
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.work-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: var(--bg-2);
  padding: 8px;
}
.work-thumb .ph { font-size: 2.6rem; opacity: 0.5; }
.work-video {
  position: relative;
  padding-top: 56.25%; /* 16:9 */
  background: #000;
}
.work-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.work-body { padding: 22px 24px; }
.work-body h3 { font-size: 1.02rem; margin-bottom: 8px; line-height: 1.4; }
.work-body p { color: var(--text-dim); font-size: 0.9rem; }
.work-tag {
  display: inline-block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 12px;
}

/* ---------- News ---------- */
.news-item {
  display: flex;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
}
.news-item:last-child { border-bottom: none; }
.news-date {
  flex-shrink: 0;
  width: 74px;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 6px;
  height: fit-content;
}
.news-date .d { font-size: 1.4rem; font-weight: 800; color: var(--accent); line-height: 1; }
.news-date .m { font-size: 0.72rem; text-transform: uppercase; color: var(--text-dim); }
.news-item h3 { font-size: 1.05rem; margin-bottom: 6px; }
.news-item h3 a { color: var(--text); }
.news-item h3 a:hover { color: var(--accent); }
.news-item p { color: var(--text-dim); font-size: 0.9rem; }

/* ---------- Contact ---------- */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: start; }
.contact-info h3 { margin-bottom: 12px; }
.contact-info p { color: var(--text-dim); margin-bottom: 18px; }
.contact-info .info-line { margin-bottom: 10px; }
.contact-info .info-line strong { color: var(--text); display: block; font-size: 0.85rem; }
.contact-info .info-line span { color: var(--text-dim); }

.form { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; }
.form label { display: block; font-size: 0.85rem; font-weight: 600; margin: 16px 0 6px; }
.form label:first-of-type { margin-top: 0; }
.form input, .form textarea {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 12px 14px;
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.15s ease;
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--accent); }
.form textarea { resize: vertical; min-height: 120px; }
.form .btn { margin-top: 22px; width: 100%; }
.form-note { font-size: 0.8rem; color: var(--text-dim); margin-top: 14px; text-align: center; }
.form-status { margin-top: 14px; padding: 12px; border-radius: 8px; font-size: 0.9rem; display: none; }
.form-status.ok { display: block; background: rgba(34,197,94,0.12); color: #4ade80; border: 1px solid rgba(34,197,94,0.3); }
.form-status.err { display: block; background: rgba(239,68,68,0.12); color: #f87171; border: 1px solid rgba(239,68,68,0.3); }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  background: var(--bg-2);
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer .brand { font-size: 1rem; }
.footer p, .footer .legal { color: var(--text-dim); font-size: 0.85rem; }
.footer .legal a { color: var(--text-dim); margin-left: 16px; }
.footer .legal a:hover { color: var(--text); }

/* ---------- Product / sub pages ---------- */
.page-hero {
  padding: 80px 0 50px;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 50% at 50% -10%, var(--accent-glow), transparent),
    linear-gradient(180deg, var(--bg-2), var(--bg));
  border-bottom: 1px solid var(--border);
}
.page-hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; max-width: 900px; margin: 0 auto 16px; line-height: 1.2; }
.page-hero p { color: var(--text-dim); max-width: 760px; margin: 0 auto; font-size: 1.05rem; }

.page-section { padding: 60px 0; }
.page-section h2 { font-size: 1.5rem; margin-bottom: 18px; }
.page-section h3 { font-size: 1.15rem; margin: 28px 0 12px; color: var(--accent); }
.page-section p { color: var(--text-dim); margin-bottom: 16px; max-width: 820px; }
.page-section a { color: var(--accent); }

.media-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 24px 0; }
.media-row .media-item { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.media-item img { width: 100%; height: 240px; object-fit: contain; display: block; background: var(--bg-2); padding: 8px; }
.media-item figcaption { padding: 12px 16px; color: var(--text-dim); font-size: 0.85rem; }

.feature-list { list-style: none; margin: 20px 0; }
.feature-list li {
  padding: 12px 16px;
  border-left: 3px solid var(--accent);
  background: var(--panel);
  border-radius: 0 8px 8px 0;
  margin-bottom: 10px;
  color: var(--text-dim);
}
.feature-list li strong { color: var(--text); }

.availability {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 30px;
}
.availability h3 { margin-top: 0; }
.availability p { margin-bottom: 0; }

@media (max-width: 700px) {
  .media-row { grid-template-columns: 1fr; }
  .media-item img { height: 200px; }
}

/* ---------- Legal pages (Privacy / Terms) ---------- */
.legal-page { padding: 70px 0 90px; }
.legal-page h1 { font-size: 2rem; margin-bottom: 8px; }
.legal-page .updated { color: var(--text-dim); font-size: 0.85rem; margin-bottom: 34px; }
.legal-page h2 { font-size: 1.3rem; margin: 34px 0 12px; color: var(--accent); }
.legal-page h3 { font-size: 1.05rem; margin: 24px 0 8px; }
.legal-page p, .legal-page li { color: var(--text-dim); margin-bottom: 12px; }
.legal-page ul { padding-left: 22px; margin-bottom: 12px; }
.legal-page a { color: var(--accent); }
.legal-body { max-width: 820px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    background: var(--bg-2);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 16px;
    align-items: flex-start;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .hero { padding: 80px 0; }
  .section { padding: 60px 0; }
}