/* Kinetik Enerji — kinetikenerji.net */
:root {
  --navy: #20409A;
  --navy-deep: #0F1A3A;
  --navy-ink: #14225C;
  --cyan: #0086CE;
  --cyan-bright: #00A4E4;
  --ink: #1B2340;
  --muted: #4A5578;
  --line: #DDE3F0;
  --bg: #FFFFFF;
  --bg-alt: #F4F6FB;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; }
a { color: var(--navy); }

.wrap { max-width: 1100px; margin-inline: auto; padding-inline: 20px; }

.skip {
  position: absolute; inset-inline-start: -9999px; top: 0;
  background: var(--navy); color: #fff; padding: 10px 16px; z-index: 100;
  border-radius: 0 0 8px 8px; text-decoration: none;
}
.skip:focus { inset-inline-start: 16px; }

/* Scroll progress (CSS scroll-driven; hidden where unsupported) */
.progress { display: none; }
@supports (animation-timeline: scroll()) {
  .progress {
    display: block; position: fixed; top: 0; inset-inline: 0; height: 3px; z-index: 60;
    background: linear-gradient(90deg, var(--cyan), var(--cyan-bright));
    transform: scaleX(0); transform-origin: 0 50%;
    animation: ke-progress linear both;
    animation-timeline: scroll(root);
  }
  [dir="rtl"] .progress { transform-origin: 100% 50%; }
  @keyframes ke-progress { to { transform: scaleX(1); } }
}

/* Header */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.head-in { display: flex; align-items: center; gap: 10px; padding-block: 8px; }
.brand { flex: 0 0 auto; display: flex; }
.brand img { width: 108px; height: auto; }
.nav { display: flex; gap: 2px; flex-wrap: wrap; margin-inline-start: auto; }
.nav a {
  text-decoration: none; color: var(--ink); font-weight: 600; font-size: 0.88rem;
  padding: 7px 9px; border-radius: 8px; white-space: nowrap;
}
.nav a:hover, .nav a:focus-visible { background: var(--bg-alt); color: var(--navy); }

/* Dropdowns (language + mobile menu) — CSS-only <details> */
.nav-dd { position: relative; }
.nav-dd > summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; gap: 6px;
  padding: 7px 10px; border-radius: 8px; font-weight: 700; font-size: 0.85rem;
  color: var(--navy-ink); border: 1px solid var(--line); user-select: none;
}
.nav-dd > summary::-webkit-details-marker { display: none; }
.nav-dd > summary:hover, .nav-dd[open] > summary { background: var(--bg-alt); border-color: var(--cyan); }
.nav-dd > summary svg { width: 17px; height: 17px; }
.lang-menu > ul, .m-menu > nav {
  position: absolute; inset-inline-end: 0; top: calc(100% + 8px); z-index: 70;
  min-width: 185px; margin: 0; padding: 6px; list-style: none;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  box-shadow: 0 12px 36px rgba(15, 26, 58, 0.14);
}
.lang-menu a {
  display: flex; gap: 8px; align-items: baseline; text-decoration: none;
  padding: 7px 10px; border-radius: 8px; font-size: 0.9rem; color: var(--ink);
}
.lang-menu b { font-size: 0.75rem; color: var(--muted); width: 1.9em; }
.lang-menu a:hover, .lang-menu a:focus-visible { background: var(--bg-alt); color: var(--navy); }
.lang-menu a[aria-current="page"] { background: var(--navy); color: #fff; }
.lang-menu a[aria-current="page"] b { color: #BBD0F5; }
.m-menu { display: none; }
.m-menu > nav { display: grid; gap: 2px; }
.m-menu > nav a {
  text-decoration: none; color: var(--ink); font-weight: 600; font-size: 0.95rem;
  padding: 9px 12px; border-radius: 8px;
}
.m-menu > nav a:hover, .m-menu > nav a:focus-visible { background: var(--bg-alt); color: var(--navy); }

/* Animated light play (hero / contact / 404) */
.glow-wrap { position: relative; overflow: hidden; isolation: isolate; }
.glow {
  position: absolute; border-radius: 50%; pointer-events: none; z-index: 0;
  filter: blur(58px); opacity: 0.9; mix-blend-mode: screen;
  will-change: transform, opacity;
}
.glow-a {
  width: 620px; height: 620px; top: -230px; inset-inline-end: -130px;
  background: radial-gradient(circle, rgba(28, 190, 255, 0.95), rgba(0, 150, 230, 0.35) 45%, transparent 68%);
  animation: drift-a 15s ease-in-out infinite alternate, glow-pulse 6.5s ease-in-out infinite;
}
.glow-b {
  width: 500px; height: 500px; bottom: -210px; inset-inline-start: -150px;
  background: radial-gradient(circle, rgba(64, 110, 235, 0.9), rgba(32, 64, 154, 0.3) 48%, transparent 68%);
  animation: drift-b 19s ease-in-out infinite alternate, glow-pulse 8s ease-in-out infinite 1s;
}
.glow-c {
  width: 520px; height: 520px; bottom: -250px; inset-inline-start: 10%;
  background: radial-gradient(circle, rgba(0, 170, 245, 0.85), rgba(0, 134, 206, 0.28) 48%, transparent 68%);
  animation: drift-a 18s ease-in-out infinite alternate, glow-pulse 7s ease-in-out infinite 0.5s;
}
@keyframes drift-a {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-110px, 80px, 0) scale(1.2); }
}
@keyframes drift-b {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(100px, -70px, 0) scale(1.15); }
}
@keyframes glow-pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}
/* Diagonal light sweep across dark sections (transform-animated = GPU-friendly) */
.hero::before, .sec-contact::before, .nf-body::before {
  content: ""; position: absolute; top: -60%; inset-inline-start: -40%;
  width: 45%; height: 220%; z-index: 0; pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(150, 220, 255, 0.28), rgba(200, 240, 255, 0.42), rgba(150, 220, 255, 0.28), transparent);
  filter: blur(6px); mix-blend-mode: screen;
  transform: rotate(18deg) translate3d(0, 0, 0);
  will-change: transform, opacity;
  animation: sweep 8s ease-in-out infinite;
}
@keyframes sweep {
  0% { transform: rotate(18deg) translate3d(-60%, 0, 0); opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { transform: rotate(18deg) translate3d(600%, 0, 0); opacity: 0; }
}
.hero-in { position: relative; z-index: 1; }

/* Hero */
.hero {
  background:
    radial-gradient(1000px 420px at 85% -10%, rgba(0, 134, 206, 0.35), transparent 60%),
    linear-gradient(160deg, var(--navy-deep) 0%, var(--navy-ink) 55%, var(--navy) 130%);
  color: #fff;
  padding-block: 84px 72px;
}
.kicker {
  color: var(--cyan-bright); font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; font-size: 0.82rem; margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(1.7rem, 4.2vw, 2.9rem); line-height: 1.15;
  margin: 0 0 18px; max-width: 21ch; text-wrap: balance;
}
.hero .sub { max-width: 62ch; font-size: 1.06rem; color: #C9D4F2; margin: 0 0 28px; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 0; }
.btn {
  display: inline-block; text-decoration: none; font-weight: 700;
  padding: 13px 24px; border-radius: 10px; font-size: 1rem;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--cyan); color: #fff; }
.btn-primary:hover, .btn-primary:focus-visible { background: var(--cyan-bright); }
.btn-ghost { border: 1.5px solid rgba(255, 255, 255, 0.45); color: #fff; }
.btn-ghost:hover, .btn-ghost:focus-visible { border-color: #fff; }
.sec .btn-ghost, .nf .btn-ghost { border-color: var(--navy); color: var(--navy); }

/* Stats */
.stats { background: var(--navy); color: #fff; }
.stats-in {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
  padding-block: 22px; text-align: center;
}
.stat strong { display: block; font-size: 1.5rem; color: #fff; }
.stat span { font-size: 0.85rem; color: #BBD0F5; }

/* Sections */
.sec { padding-block: 72px; scroll-margin-top: 74px; }
.sec-alt { background: var(--bg-alt); }
.sec h2 { font-size: clamp(1.4rem, 3vw, 2rem); margin: 0 0 12px; color: var(--navy-ink); }
.lead { max-width: 75ch; color: var(--muted); font-size: 1.03rem; margin: 0 0 16px; }

/* Service cards */
.cards {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 18px; margin-top: 28px;
}
.card {
  background: var(--bg); border: 1px solid var(--line); border-radius: 14px;
  padding: 24px; transition: box-shadow 0.15s ease, border-color 0.15s ease;
}
.card:hover { border-color: var(--cyan); box-shadow: 0 8px 28px rgba(15, 26, 58, 0.08); }
.card-ic {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--navy), var(--cyan)); color: #fff; margin-bottom: 14px;
}
.ic { width: 24px; height: 24px; }
.card h3 { margin: 0 0 10px; font-size: 1.08rem; color: var(--navy-ink); }
.card ul { margin: 0; padding-inline-start: 18px; color: var(--muted); font-size: 0.95rem; }
.card li { margin-block: 4px; }

/* Sector chips */
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 22px 0 0; }
.chips li {
  background: var(--bg); border: 1px solid var(--line); border-radius: 999px;
  padding: 9px 18px; font-weight: 600; font-size: 0.93rem; color: var(--navy-ink);
}

/* References */
.refs {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px; margin-top: 26px;
}
.ref {
  border: 1px solid var(--line); border-radius: 14px; padding: 20px 22px;
  background: linear-gradient(150deg, var(--bg) 60%, var(--bg-alt));
  border-inline-start: 3px solid var(--cyan);
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}
.ref:hover { box-shadow: 0 8px 28px rgba(15, 26, 58, 0.08); border-color: var(--cyan); }
.ref h3 { margin: 0 0 6px; font-size: 1.02rem; color: var(--navy-ink); }
.ref p { margin: 0; color: var(--muted); font-size: 0.93rem; }

/* Region columns */
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 24px; margin-top: 18px; }
.col { border-inline-start: 3px solid var(--cyan); padding-inline-start: 18px; }
.col h3 { margin: 0 0 8px; color: var(--navy-ink); }
.col p { margin: 0; color: var(--muted); }

/* FAQ */
.faq {
  border: 1px solid var(--line); border-radius: 12px;
  padding: 4px 18px; margin-block: 10px; background: var(--bg);
}
.faq summary {
  cursor: pointer; font-weight: 700; color: var(--navy-ink);
  padding-block: 12px; list-style-position: outside;
}
.faq summary:hover { color: var(--cyan); }
.faq p { margin: 0 0 14px; color: var(--muted); }
.faq[open] { border-color: var(--cyan); }

/* Contact */
.sec-contact {
  background:
    radial-gradient(800px 300px at 15% 110%, rgba(0, 134, 206, 0.3), transparent 60%),
    linear-gradient(200deg, var(--navy-ink), var(--navy-deep));
  color: #fff;
}
.sec-contact h2 { color: #fff; }
.sec-contact .lead { color: #C9D4F2; }
.contact-lines { list-style: none; margin: 26px 0 0; padding: 0; display: grid; gap: 8px; }
.contact-lines li { color: #C9D4F2; font-size: 1rem; }
.contact-lines a { color: #fff; text-decoration: none; font-weight: 600; }
.contact-lines a:hover, .contact-lines a:focus-visible { color: var(--cyan-bright); text-decoration: underline; }

/* Footer */
.site-foot { background: var(--navy-deep); color: #A9B6DD; font-size: 0.93rem; }
.foot-in {
  display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between;
  align-items: flex-start; padding-block: 44px 20px;
}
.foot-in img { width: 118px; height: auto; }
.foot-in p { margin: 12px 0 0; max-width: 40ch; }
.foot-in nav { display: grid; gap: 8px; }
.foot-in nav a { color: #C9D4F2; text-decoration: none; }
.foot-in nav a:hover { color: #fff; text-decoration: underline; }
.foot-legal { font-size: 0.8rem; max-width: 42ch; }
.foot-legal p { margin: 0 0 6px; }
.copy { border-top: 1px solid rgba(255, 255, 255, 0.12); }
.copy p { padding-block: 18px; margin: 0; font-size: 0.85rem; }

/* 404 */
.nf-body {
  display: grid; place-items: center; min-height: 100svh;
  background:
    radial-gradient(900px 400px at 70% 0%, rgba(0, 134, 206, 0.3), transparent 60%),
    linear-gradient(160deg, var(--navy-deep), var(--navy-ink));
  color: #fff; text-align: center; padding: 24px;
}
.nf { position: relative; z-index: 1; }
.nf-bolt { width: 68px; height: 68px; color: var(--cyan-bright); filter: drop-shadow(0 0 18px rgba(0, 164, 228, 0.65)); }
.nf-code { font-size: 1rem; letter-spacing: 0.4em; color: var(--cyan-bright); font-weight: 700; margin: 18px 0 4px; }
.nf h1 { font-size: clamp(1.8rem, 5vw, 2.8rem); margin: 0 0 12px; }
.nf-sub { color: #C9D4F2; max-width: 52ch; margin: 0 auto 26px; }

/* Sitemap (XSL) view */
.smap { padding-block: 48px; }
.smap h1 { color: var(--navy-ink); margin: 18px 0 8px; }
.smap table { border-collapse: collapse; width: 100%; margin-top: 18px; }
.smap th, .smap td { text-align: start; padding: 10px 14px; border-bottom: 1px solid var(--line); font-size: 0.95rem; }
.smap th { color: var(--navy-ink); background: var(--bg-alt); }

/* Small screens */
@media (max-width: 900px) {
  .nav { display: none; }
  .m-menu { display: block; }
  .head-in { gap: 8px; }
  .brand { margin-inline-end: auto; }
  .brand img { width: 100px; }
  .hero { padding-block: 56px 48px; }
  .stats-in { grid-template-columns: repeat(2, 1fr); }
  .sec { padding-block: 52px; }
  .glow { filter: blur(55px); }
}