/* =========================================================
   Mallard — AKAR Aerospace brand typeface
   ========================================================= */
@font-face{font-family:'Mallard';src:url('../fonts/Mallard-Thin.woff') format('woff');font-weight:200;font-style:normal;font-display:swap;}
@font-face{font-family:'Mallard';src:url('../fonts/Mallard-Light.woff') format('woff');font-weight:300;font-style:normal;font-display:swap;}
@font-face{font-family:'Mallard';src:url('../fonts/Mallard-Regular.woff') format('woff');font-weight:400;font-style:normal;font-display:swap;}
@font-face{font-family:'Mallard';src:url('../fonts/Mallard-Medium.woff') format('woff');font-weight:500;font-style:normal;font-display:swap;}
@font-face{font-family:'Mallard';src:url('../fonts/Mallard-Semibold.woff') format('woff');font-weight:600;font-style:normal;font-display:swap;}
@font-face{font-family:'Mallard';src:url('../fonts/Mallard-Bold.woff') format('woff');font-weight:700;font-style:normal;font-display:swap;}
@font-face{font-family:'Mallard';src:url('../fonts/Mallard-Black.woff') format('woff');font-weight:800;font-style:normal;font-display:swap;}
@font-face{font-family:'Mallard';src:url('../fonts/Mallard-Ultra.woff') format('woff');font-weight:900;font-style:normal;font-display:swap;}

/* =========================================================
   AKAR Aerospace — core stylesheet
   Dark, high-contrast "advanced technology" aesthetic
   ========================================================= */

:root {
  --bg:          #0a0c0f;
  --bg-alt:      #0d1116;
  --surface:     #12171e;
  --surface-2:   #161d26;
  --line:        rgba(247, 250, 252, 0.09);
  --line-strong: rgba(247, 250, 252, 0.18);
  --text:        #f7fafc;
  --muted:       #97a3b2;
  --muted-2:     #6c7784;
  --accent:      #5aa9e6;   /* atmosphere blue */
  --accent-dim:  rgba(90, 169, 230, 0.14);
  --accent-line: rgba(90, 169, 230, 0.4);
  --maxw:        1240px;
  --ease:        cubic-bezier(0.4, 0, 0.1, 1);
  --font-body:   'Mallard', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-head:   'Mallard', system-ui, sans-serif;
  --font-mono:   'Mallard', ui-monospace, 'Cascadia Code', monospace;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 108.5%; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ---------- typography ---------- */
h1, h2, h3, h4, .display {
  font-family: var(--font-head);
  font-weight: 500;
  line-height: 1.04;
  letter-spacing: -0.01em;
  text-transform: uppercase;   /* brand: all headings uppercase */
}
h1, .display { font-weight: 600; }   /* Semibold — lightest confident weight */
h3, h4 { font-weight: 500; letter-spacing: 0; }
.eyebrow {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--accent-line);
}
.section-lead {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 60ch;
}

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }
section { position: relative; }
.pad    { padding: 120px 0; }
.pad-sm { padding: 80px 0; }
.divider { height: 1px; background: var(--line); border: 0; }

/* ---------- header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(10, 12, 15, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 84px;
}
.nav-logo svg, .nav-logo img { height: 46px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  color: var(--muted);
  transition: color 0.25s var(--ease);
  position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 100%; height: 1px; background: var(--accent);
}
.nav-right { display: flex; align-items: center; gap: 22px; }

/* language toggle */
.lang-toggle {
  display: flex; align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  overflow: hidden;
  font-family: var(--font-head);
}
.lang-toggle button {
  background: transparent; border: 0; cursor: pointer;
  color: var(--muted-2);
  font-size: 0.72rem; font-weight: 500; letter-spacing: 0.08em;
  padding: 6px 11px;
  transition: all 0.25s var(--ease);
  font-family: inherit;
}
.lang-toggle button.active { background: var(--text); color: var(--bg); }

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-head);
  font-size: 0.84rem; font-weight: 500; letter-spacing: 0.03em;
  padding: 13px 26px;
  border-radius: 2px;
  transition: all 0.3s var(--ease);
  cursor: pointer; border: 1px solid transparent;
  white-space: nowrap;
}
.btn .arw { transition: transform 0.3s var(--ease); }
.btn:hover .arw { transform: translateX(4px); }
.btn-primary { background: var(--text); color: var(--bg); }
.btn-primary:hover { background: var(--accent); color: var(--bg); }
.btn-ghost { border-color: var(--line-strong); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* mobile nav toggle */
.nav-mobile { display: none; }
.nav-burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-burger span { display: block; width: 22px; height: 1.5px; background: var(--text); margin: 5px 0; transition: 0.3s var(--ease); }

/* ---------- hero ---------- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding-top: 84px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(180deg, #0a0c0f, #0b0e13);
  background-size: cover; background-position: center;
}
/* home hero — day sky (civil aerospace) with legibility scrim */
.hero .hero-bg {
  background-image:
    radial-gradient(ellipse 70% 55% at 74% 20%, rgba(123,194,243,0.16), transparent 60%),
    linear-gradient(90deg, rgba(8,10,14,0.92) 0%, rgba(8,10,14,0.55) 46%, rgba(8,10,14,0.18) 100%),
    linear-gradient(180deg, rgba(8,10,14,0.20) 0%, rgba(8,10,14,0.28) 52%, rgba(8,10,14,0.88) 100%),
    url('../img/bg/sky-day.jpg');
  background-size: cover;
  background-position: center 32%;
}
/* interior heroes + CTA — night sky (per brand: night → dark frame) */
.page-hero .hero-bg, .cta-band {
  background-image:
    linear-gradient(90deg, rgba(8,10,14,0.88) 0%, rgba(8,10,14,0.58) 50%, rgba(8,10,14,0.42) 100%),
    linear-gradient(180deg, rgba(8,10,14,0.34) 0%, rgba(8,10,14,0.56) 60%, rgba(8,10,14,0.90) 100%),
    url('../img/bg/sky-night.jpg');
  background-size: cover;
  background-position: center;
}
/* soft vignette (replaces the old checkered grid) */
.hero-grid {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(ellipse 92% 82% at 50% 32%, transparent 42%, rgba(8,10,14,0.55) 100%);
}
.hero .wrap { position: relative; z-index: 2; }
.hero-inner { max-width: 900px; }
.hero h1 {
  font-size: clamp(2.6rem, 6.4vw, 5.4rem);
  margin: 26px 0 0;
  letter-spacing: -0.03em;
}
.hero h1 .thin { color: var(--muted); }
.hero p.lead {
  margin-top: 28px; font-size: clamp(1.05rem, 1.7vw, 1.3rem);
  color: var(--muted); max-width: 62ch; line-height: 1.55;
}
.hero-cta { margin-top: 44px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero-meta {
  position: absolute; bottom: 40px; left: 0; right: 0; z-index: 2;
}
.hero-meta .wrap { display: flex; justify-content: space-between; align-items: end; gap: 24px; flex-wrap: wrap; }
.hero-scroll { font-size: 0.72rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--muted-2); }
.hero-coord { font-family: var(--font-mono); font-size: 0.74rem; color: var(--muted-2); letter-spacing: 0.06em; }
.hero-origin { display: inline-flex; align-items: center; gap: 11px; font-family: var(--font-head); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.hero-origin .tr-flag { width: 27px; height: auto; flex-shrink: 0; border-radius: 2px; }
.hero-meta > .wrap { max-width: none; padding: 0 44px; }

/* ---------- section head ---------- */
.sec-head { display: flex; justify-content: space-between; align-items: end; gap: 40px; flex-wrap: wrap; margin-bottom: 56px; }
.sec-head h2 { font-size: clamp(1.9rem, 3.6vw, 3rem); max-width: 18ch; }
.sec-head .section-lead { padding-bottom: 6px; }

/* ---------- application / sector cards ---------- */
.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.cell {
  background: var(--bg);
  padding: 40px 34px;
  position: relative;
  transition: background 0.4s var(--ease);
  min-height: 240px;
  display: flex; flex-direction: column;
}
.cell:hover { background: var(--surface); }
.cell .idx {
  font-family: var(--font-mono); font-size: 0.74rem;
  color: var(--muted-2); letter-spacing: 0.08em;
}
.cell h3 { font-size: 1.4rem; margin-top: 18px; }
.cell p { color: var(--muted); margin-top: 12px; font-size: 0.95rem; flex-grow: 1; }
.cell .tag {
  margin-top: 20px; font-family: var(--font-head);
  font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent);
}
.cell .cell-ico { width: 30px; height: 30px; stroke: var(--accent); stroke-width: 1.4; fill: none; }

/* ---------- capabilities list ---------- */
.cap-row {
  display: grid; grid-template-columns: 90px 1fr auto;
  gap: 32px; align-items: start;
  padding: 44px 0; border-top: 1px solid var(--line);
  transition: padding-left 0.35s var(--ease);
}
.cap-row:hover { padding-left: 12px; }
.cap-row:last-child { border-bottom: 1px solid var(--line); }
.cap-num { font-family: var(--font-mono); font-size: 0.9rem; color: var(--accent); padding-top: 8px; }
.cap-main h3 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
.cap-main p { color: var(--muted); margin-top: 14px; max-width: 65ch; }
.cap-meta { font-family: var(--font-head); font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted-2); padding-top: 12px; text-align: right; }

/* ---------- stats ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border-block: 1px solid var(--line); }
.stat { background: var(--bg); padding: 40px 30px; }
.stat .num { font-family: var(--font-head); font-size: clamp(2.2rem, 4vw, 3.2rem); font-weight: 500; letter-spacing: -0.02em; }
.stat .lbl { color: var(--muted); font-size: 0.86rem; margin-top: 8px; }

/* ---------- certifications ---------- */
.certs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.cert { background: var(--bg); padding: 34px 28px; display: flex; flex-direction: column; gap: 10px; transition: background 0.4s var(--ease); }
.cert:hover { background: var(--surface); }
.cert .code { font-family: var(--font-head); font-size: 1.5rem; font-weight: 500; letter-spacing: -0.01em; }
.cert .status { font-size: 0.78rem; letter-spacing: 0.08em; display: inline-flex; align-items: center; gap: 8px; }
.cert .status::before { content:""; width: 7px; height: 7px; border-radius: 50%; }
.cert .status.ok { color: #7fd6a0; }
.cert .status.ok::before { background: #7fd6a0; box-shadow: 0 0 10px rgba(127,214,160,0.6); }
.cert .status.pend { color: var(--muted-2); }
.cert .status.pend::before { background: var(--muted-2); }
.cert .desc { color: var(--muted); font-size: 0.84rem; }

/* ---------- CTA band ---------- */
.cta-band { position: relative; overflow: hidden; border-block: 1px solid var(--line); }
.cta-band .hero-grid { opacity: 0.35; }
.cta-inner { position: relative; z-index: 2; text-align: center; max-width: 760px; margin: 0 auto; }
.cta-inner h2 { font-size: clamp(2rem, 4.4vw, 3.4rem); }
.cta-inner p { color: var(--muted); margin-top: 20px; font-size: 1.08rem; }
.cta-inner .hero-cta { justify-content: center; margin-top: 36px; }

/* ---------- page hero (interior) ---------- */
.page-hero { padding: 180px 0 90px; border-bottom: 1px solid var(--line); position: relative; overflow: hidden; }
.page-hero .hero-bg, .page-hero .hero-grid { z-index: 0; }
.page-hero .wrap { position: relative; z-index: 2; }
.page-hero h1 { font-size: clamp(2.4rem, 5.4vw, 4.4rem); margin-top: 22px; }
.page-hero p { color: var(--muted); margin-top: 24px; max-width: 64ch; font-size: 1.1rem; }

/* ---------- prose / about ---------- */
.prose p { color: var(--muted); font-size: 1.08rem; margin-bottom: 22px; max-width: 68ch; }
.prose p strong { color: var(--text); font-weight: 500; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.contact-block { background: var(--bg); padding: 48px 42px; }
.contact-block h3 { font-size: 1.3rem; margin-bottom: 22px; }
.contact-item { padding: 18px 0; border-top: 1px solid var(--line); }
.contact-item:first-of-type { border-top: 0; }
.contact-item .k { font-family: var(--font-head); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted-2); }
.contact-item .v { color: var(--text); margin-top: 6px; font-size: 1.02rem; }
.contact-item a.v:hover { color: var(--accent); }

.form-row { margin-bottom: 20px; }
.form-row label { display: block; font-size: 0.76rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 8px; font-family: var(--font-head); }
.form-row input, .form-row textarea {
  width: 100%; background: var(--surface); border: 1px solid var(--line-strong);
  color: var(--text); padding: 13px 15px; border-radius: 2px; font-family: inherit; font-size: 0.95rem;
  transition: border-color 0.25s var(--ease);
}
.form-row input:focus, .form-row textarea:focus { outline: none; border-color: var(--accent); }
.form-row textarea { resize: vertical; min-height: 130px; }
.form-note { color: var(--muted-2); font-size: 0.82rem; margin-top: 14px; }

/* ---------- application detail blocks ---------- */
.app { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; padding: 90px 0; border-top: 1px solid var(--line); }
.app:first-child { border-top: 0; }
.app.rev .app-body { order: 2; }   /* rev: visual left, body right (true alternation) */
.app-body .app-no { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.1em; color: var(--accent); }
/* clickable capability card (Bearings & PT) */
a.app-link { text-decoration: none; color: inherit; cursor: pointer; }
a.app-link .app-visual { transition: border-color 0.35s var(--ease), background 0.35s var(--ease); }
a.app-link:hover .app-visual { border-color: var(--accent-line); background: var(--surface-2); }
.app-cta { display: inline-flex; align-items: center; margin-top: 24px; font-family: var(--font-head); font-size: 0.92rem; font-weight: 500; letter-spacing: 0.04em; color: var(--accent); transition: color 0.3s var(--ease), transform 0.3s var(--ease); }
a.app-link:hover .app-cta { color: var(--text); transform: translateX(4px); }
.app-body h2 { font-size: clamp(1.9rem, 3.6vw, 3rem); margin: 16px 0 20px; }
.app-body p { color: var(--muted); font-size: 1.06rem; max-width: 52ch; }
.app-body ul { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 10px; }
.app-body ul li { font-family: var(--font-head); font-size: 0.76rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); border: 1px solid var(--line-strong); border-radius: 2px; padding: 8px 14px; }
.app-visual { position: relative; aspect-ratio: 4 / 3; border: 1px solid var(--line); background: var(--surface); overflow: hidden; }
.app-visual .v-grid { position: absolute; inset: 0; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 40px 40px; opacity: 0.7; }
.app-visual .v-glow { position: absolute; inset: 0; background: radial-gradient(circle at 60% 40%, rgba(90,169,230,0.16), transparent 62%); }
.app-visual .v-mark { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.app-visual .v-mark svg, .app-visual .v-mark img { width: 42%; opacity: 0.9; }
.app-visual .v-code { position: absolute; bottom: 16px; left: 18px; z-index: 3; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; color: var(--muted); }
/* photo layer (placeholder imagery — swap src for final photos) */
.app-visual.has-photo .v-photo { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; filter: grayscale(0.35) contrast(1.03) brightness(0.82); transition: filter 0.5s var(--ease); }
.app-visual.has-photo .v-shade { position: absolute; inset: 0; z-index: 1; background: linear-gradient(180deg, rgba(10,12,15,0.32), rgba(10,12,15,0.08) 45%, rgba(10,12,15,0.80)), radial-gradient(120% 80% at 75% 20%, rgba(90,169,230,0.16), transparent 60%); }
a.app-link:hover .app-visual.has-photo .v-photo { filter: grayscale(0.1) contrast(1.05) brightness(0.94); }
/* graceful fallback: if a remote photo fails, show the vector illustration */
.app-visual.has-photo .v-photo.v-fallback { object-fit: contain; padding: 12%; filter: none; opacity: 0.92; }
.img-credit { margin-top: 48px; text-align: center; color: var(--muted-2); font-size: 0.78rem; letter-spacing: 0.02em; }
.img-credit a { color: var(--muted); text-decoration: underline; text-underline-offset: 2px; }
@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; gap: 30px; padding: 54px 0; }
  .app.rev .app-body { order: 0; }
}

/* ---------- footer ---------- */
.site-footer { background: var(--bg-alt); border-top: 1px solid var(--line); padding: 72px 0 34px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand svg, .footer-brand img { height: 40px; margin-bottom: 24px; }
.footer-brand p { color: var(--muted); font-size: 0.92rem; max-width: 34ch; }
.footer-col h4 { font-size: 0.74rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 20px; font-weight: 500; }
.footer-col a { display: block; color: var(--muted); font-size: 0.92rem; padding: 7px 0; transition: color 0.25s var(--ease); }
.footer-col a:hover { color: var(--text); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; margin-top: 60px; padding-top: 26px; border-top: 1px solid var(--line); }
.footer-bottom p { color: var(--muted-2); font-size: 0.82rem; }
.footer-bottom .fb-right { display: flex; gap: 24px; }
.footer-bottom .fb-right a { color: var(--muted-2); font-size: 0.82rem; }
.footer-bottom .fb-right a:hover { color: var(--text); }

/* ---------- reveal animation ---------- */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1040px) {
  .nav-cta { display: none; }
  .nav-links { gap: 26px; }
}
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .certs, .stats { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 44px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 40px 30px; }
}
@media (max-width: 720px) {
  .wrap { padding: 0 22px; }
  .pad { padding: 84px 0; }
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-burger { display: block; }
  .nav-mobile {
    position: fixed; inset: 84px 0 auto 0; background: var(--bg);
    border-bottom: 1px solid var(--line); padding: 20px 22px 30px;
    display: none; flex-direction: column; gap: 4px; z-index: 99;
  }
  .nav-mobile.open { display: flex; }
  .nav-mobile a { padding: 14px 0; color: var(--muted); border-bottom: 1px solid var(--line); font-size: 1rem; }
  .cap-row { grid-template-columns: 1fr; gap: 10px; padding: 32px 0; }
  .cap-meta { text-align: left; padding-top: 4px; }
  .cap-num { padding-top: 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .certs, .stats { grid-template-columns: 1fr 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .hero-meta { display: none; }
}