/* ===================== TOKENS ===================== */
:root {
  --bg:        #0d1117;
  --bg-alt:    #10161e;
  --panel:     #161b22;
  --panel-2:   #1c232c;
  --border:    #21262d;
  --text:      #e6edf3;
  --muted:     #8b949e;
  --green:     #2ea043;
  --green-2:   #238636;
  --green-soft:rgba(46,160,67,.14);
  --radius:    14px;
  --maxw:      1140px;
  --nav-h:     72px;
  font-synthesis: none;
}

/* ===================== BASE ===================== */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }
body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* subtle circuit-grid backdrop, echoing the CND logo motif */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(46,160,67,.10) 1px, transparent 0);
  background-size: 38px 38px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 70%);
          mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 70%);
}

/* ===================== NAV ===================== */
.nav {
  position: sticky; top: 0; z-index: 50; height: var(--nav-h);
  background: rgba(13,17,23,.72);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.is-scrolled { border-bottom-color: var(--border); background: rgba(13,17,23,.9); }
.nav__inner {
  max-width: var(--maxw); margin: 0 auto; height: 100%; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav__logo { height: 30px; width: auto; }
.nav__links { display: flex; align-items: center; gap: 30px; }
.nav__links > a {
  font-size: 15px; font-weight: 500; color: var(--muted);
  position: relative; padding: 4px 0; transition: color .2s;
}
.nav__links > a:hover { color: var(--text); }
.nav__links > a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px;
  background: var(--green); transition: width .25s;
}
.nav__links > a:hover::after { width: 100%; }

.lang {
  background: var(--panel); border: 1px solid var(--border); color: var(--muted);
  font-family: inherit; font-weight: 600; font-size: 13px; letter-spacing: .5px;
  padding: 6px 12px; border-radius: 999px; cursor: pointer; transition: .2s;
}
.lang:hover { border-color: var(--green); color: var(--text); }
.lang .lang__sep { opacity: .4; margin: 0 2px; }
.lang__tr, .lang__en { transition: color .2s; }
body[data-lang="tr"] .lang__tr { color: var(--green); }
body[data-lang="en"] .lang__en { color: var(--green); }

.nav__burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav__burger span {
  display: block; width: 24px; height: 2px; background: var(--text);
  border-radius: 2px; transition: .3s;
}
.nav__burger span + span { margin-top: 5px; }

/* ===================== BUTTONS ===================== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 15px; padding: 12px 22px;
  border-radius: 10px; cursor: pointer; transition: transform .15s, background .2s, border-color .2s;
  border: 1px solid transparent;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--green-2); color: #fff; }
.btn--primary:hover { background: var(--green); }
.btn--ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn--ghost:hover { border-color: var(--green); }
.btn__arrow { font-size: 16px; }

/* ===================== HERO ===================== */
.hero { position: relative; padding: 96px 0 104px; overflow: hidden; }
.hero__glow {
  position: absolute; top: -200px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 600px; pointer-events: none;
  background: radial-gradient(closest-side, var(--green-soft), transparent 70%);
}
.hero__inner { position: relative; text-align: center; display: flex; flex-direction: column; align-items: center; }
.hero__logo { height: 116px; width: auto; margin-bottom: 28px; filter: drop-shadow(0 8px 30px rgba(46,160,67,.18)); }
.hero__title {
  font-family: "Space Grotesk", sans-serif; font-weight: 700;
  font-size: clamp(30px, 5.5vw, 52px); line-height: 1.05; letter-spacing: -1px;
}
.hero__title span { display: block; font-size: .42em; font-weight: 600; color: var(--muted); letter-spacing: 2px; margin-top: 10px; }
.hero__slogan {
  margin-top: 22px; font-family: "Space Grotesk", sans-serif; font-weight: 600;
  font-size: clamp(18px, 3vw, 24px); color: var(--green);
}
.hero__lead { margin-top: 16px; max-width: 640px; color: var(--muted); font-size: 17px; }
.hero__cta { margin-top: 36px; display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }

/* ===================== SECTIONS ===================== */
.section { padding: 88px 0; }
.section--alt { background: var(--bg-alt); border-block: 1px solid var(--border); }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase;
  color: var(--green); padding: 5px 12px; border: 1px solid var(--green-soft);
  background: var(--green-soft); border-radius: 999px; margin-bottom: 18px;
}
.section__title {
  font-family: "Space Grotesk", sans-serif; font-weight: 700;
  font-size: clamp(24px, 4vw, 38px); line-height: 1.15; letter-spacing: -.5px;
  max-width: 760px; margin-bottom: 44px;
}

/* cards */
.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; transition: border-color .25s, transform .25s;
}
.card:hover { border-color: var(--green-2); transform: translateY(-4px); }
.card__icon {
  width: 46px; height: 46px; display: grid; place-items: center;
  background: var(--green-soft); color: var(--green); border-radius: 12px;
  font-size: 20px; margin-bottom: 18px;
}
.card h3 { font-family: "Space Grotesk", sans-serif; font-size: 21px; margin-bottom: 12px; }
.card p { color: var(--muted); font-size: 15.5px; }

.band {
  margin-top: 24px; background: linear-gradient(120deg, var(--green-soft), transparent 60%);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 32px;
}
.band h3 { font-family: "Space Grotesk", sans-serif; font-size: 22px; margin-bottom: 8px; }
.band p { color: var(--text); font-size: 16.5px; }

/* brand */
.brand {
  display: grid; grid-template-columns: 320px 1fr; gap: 40px; align-items: center;
  background: var(--panel); border: 1px solid var(--border); border-radius: 18px; padding: 40px;
}
.brand__logo {
  display: grid; place-items: center; padding: 36px 24px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 14px;
}
.brand__logo img { max-height: 56px; width: auto; }
.brand__body h3 { font-family: "Space Grotesk", sans-serif; font-size: 26px; }
.brand__tag { color: var(--green); font-weight: 600; margin: 6px 0 14px; }
.brand__body > p { color: var(--muted); font-size: 15.5px; }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 26px; }
.chips li {
  font-size: 13.5px; font-weight: 500; color: var(--text);
  background: var(--panel-2); border: 1px solid var(--border);
  padding: 7px 14px; border-radius: 999px;
}

/* contact */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: stretch; }
.contact__info { display: flex; flex-direction: column; gap: 14px; }
.contact__item {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 20px 22px; transition: border-color .25s, transform .15s;
}
a.contact__item:hover { border-color: var(--green); transform: translateX(3px); }
.contact__icon {
  flex: none; width: 44px; height: 44px; display: grid; place-items: center;
  background: var(--green-soft); color: var(--green); border-radius: 12px;
}
.contact__item small { display: block; color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: 1px; }
.contact__item strong { font-size: 16px; font-weight: 600; word-break: break-word; }
.contact__item em { display: block; margin-top: 4px; color: var(--muted); font-style: normal; font-size: 14px; }
.contact__map {
  border: 1px solid var(--border); border-radius: 14px; overflow: hidden; min-height: 340px;
}
.contact__map iframe { width: 100%; height: 100%; min-height: 340px; border: 0; filter: grayscale(.3) contrast(1.05); }

/* ===================== FOOTER ===================== */
.footer { border-top: 1px solid var(--border); padding: 32px 0; background: var(--bg-alt); }
.footer__inner { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; justify-content: space-between; }
.footer__logo { height: 26px; width: auto; opacity: .85; }
.footer p { color: var(--muted); font-size: 14px; }

/* ===================== REVEAL ===================== */
.section, .hero__inner > * { opacity: 1; }
[data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  html { scroll-behavior: auto; }
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr; }
  .brand { grid-template-columns: 1fr; gap: 28px; padding: 28px; }
  .contact { grid-template-columns: 1fr; }

  .nav__burger { display: block; z-index: 60; }
  .nav__links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; align-items: flex-start; gap: 4px;
    background: var(--panel); border-bottom: 1px solid var(--border);
    padding: 20px 24px 28px; transform: translateY(-120%); transition: transform .35s ease;
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__links > a { width: 100%; padding: 12px 0; font-size: 17px; border-bottom: 1px solid var(--border); }
  .nav__links > a::after { display: none; }
  .lang { margin-top: 12px; }
  .nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__burger.is-open span:nth-child(2) { opacity: 0; }
  .nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}
@media (max-width: 480px) {
  .section { padding: 64px 0; }
  .hero { padding: 64px 0 72px; }
  .card, .band { padding: 24px; }
}