/* ==========================================================================
   Sezgin Grup — kurumsal site
   Kimlik: F1 "Holografik" — derin siyah zemin, yanardoner cyan-mavi-mor
   gradyan vurgu, buzlu cam paneller, isiyan ince kenarlar.
   ========================================================================== */

@font-face {
  font-family: "Outfit";
  src: url("../fonts/outfit-latin-ext.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7,
    U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F,
    U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F,
    U+A720-A7FF;
}
@font-face {
  font-family: "Outfit";
  src: url("../fonts/outfit-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6,
    U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122,
    U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  /* Holografik vurgu */
  --cyan:    #22d3ee;
  --violet:  #8b5cf6;
  --blue: #3b82f6;
  --grad: linear-gradient(110deg, var(--cyan) 0%, var(--blue) 50%, var(--violet) 100%);
  --grad-soft: linear-gradient(110deg, rgba(34,211,238,.16), rgba(59,130,246,.16) 50%, rgba(139,92,246,.16));

  /* Zemin */
  --bg:   #04060a;
  --bg-2: #070a12;
  --glass:        rgba(255,255,255,.035);
  --glass-strong: rgba(255,255,255,.06);
  --line:  rgba(255,255,255,.09);
  --line-2: rgba(255,255,255,.14);

  /* Metin */
  --fg:     #eaf0fb;
  --fg-mid: #9aa6bd;
  --fg-dim: #5a6478;

  /* Olcu */
  --pad: clamp(1.25rem, 5vw, 6rem);
  --maxw: 1280px;
  --r: 16px;

  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, monospace;
}

/* --------------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: "Outfit", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img, svg, canvas { display: block; max-width: 100%; }
ul { list-style: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; }

::selection { background: rgba(139,92,246,.4); color: #fff; }

/* --------------------------------------------------------------------------
   Arka plan — scroll-reaktif holografik placeholder (video sonra takilacak)
   -------------------------------------------------------------------------- */
.bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(139,92,246,.12), transparent 60%),
    radial-gradient(90% 60% at 100% 100%, rgba(34,211,238,.10), transparent 55%),
    var(--bg);
}
.bg__canvas { position: absolute; inset: 0; width: 100%; height: 100%; background: var(--bg); }
.bg__grid {
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(120% 90% at 50% 40%, #000 20%, transparent 72%);
  -webkit-mask-image: radial-gradient(120% 90% at 50% 40%, #000 20%, transparent 72%);
  opacity: .5;
}
/* Yazi okunurlugu icin karartma; kaydirdikca JS ile koyulasir */
.bg__scrim {
  position: absolute; inset: 0; opacity: .5;
  background:
    linear-gradient(90deg, rgba(4,6,10,.9) 0%, rgba(4,6,10,.55) 40%, rgba(4,6,10,.18) 100%),
    linear-gradient(0deg, rgba(4,6,10,.85) 0%, rgba(4,6,10,.06) 50%, rgba(4,6,10,.5) 100%);
}

/* --------------------------------------------------------------------------
   Yardimcilar
   -------------------------------------------------------------------------- */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad); }

.section { position: relative; padding-block: clamp(5rem, 12vw, 10rem); }

.eyebrow {
  display: inline-flex; align-items: center; gap: .6em;
  font-family: var(--mono);
  font-size: .72rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--fg-mid);
}
.eyebrow::before {
  content: ""; width: 26px; height: 1px;
  background: var(--grad);
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

.h-xl { font-size: clamp(2.4rem, 5.6vw, 5rem); font-weight: 600; line-height: 1.04; letter-spacing: -.02em; }
.h-lg { font-size: clamp(1.9rem, 4.4vw, 3.4rem); font-weight: 600; line-height: 1.08; letter-spacing: -.02em; }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.3rem); color: var(--fg-mid); max-width: 60ch; }

/* Butonlar */
.btn {
  display: inline-flex; align-items: center; gap: .6em;
  padding: .9em 1.5em; border-radius: 999px;
  font-weight: 500; font-size: .98rem;
  transition: transform .3s cubic-bezier(.2,.8,.2,1), box-shadow .3s, border-color .3s;
  will-change: transform;
}
.btn--primary {
  color: #04060a; position: relative;
  background: var(--grad);
  box-shadow: 0 0 0 0 rgba(139,92,246,.5);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px -8px rgba(139,92,246,.6); }
.btn--ghost {
  color: var(--fg); border: 1px solid var(--line-2);
  background: var(--glass);
  backdrop-filter: blur(6px);
}
.btn--ghost:hover { transform: translateY(-2px); border-color: var(--cyan); color: #fff; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s cubic-bezier(.16,1,.3,1), transform .9s cubic-bezier(.16,1,.3,1); }
.reveal.in { opacity: 1; transform: none; }

/* --------------------------------------------------------------------------
   Gezinme
   -------------------------------------------------------------------------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem;
  padding: 1.1rem var(--pad);
  transition: background .4s, backdrop-filter .4s, border-color .4s, padding .4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(4,6,10,.7);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--line);
  padding-block: .8rem;
}
.nav__logo { display: flex; align-items: center; gap: .7rem; font-weight: 700; letter-spacing: .02em; font-size: 1.15rem; }
.nav__logo img { height: 34px; width: auto; display: block; }
.footer__logo img { height: 40px; }
.nav__links { display: flex; gap: 2rem; }
.nav__links a {
  font-size: .95rem; color: var(--fg-mid); position: relative;
  transition: color .25s;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; height: 1px; width: 0;
  background: var(--grad); transition: width .3s;
}
.nav__links a:hover { color: var(--fg); }
.nav__links a:hover::after { width: 100%; }

.nav__right { display: flex; align-items: center; gap: 1rem; }
.nav__lang {
  display: inline-flex; font-family: var(--mono); font-size: .72rem;
  border: 1px solid var(--line); border-radius: 999px; overflow: hidden;
}
.nav__lang button { padding: .35em .8em; color: var(--fg-dim); letter-spacing: .1em; }
.nav__lang button.on { background: var(--grad); color: #04060a; }
.nav__cta {
  padding: .6em 1.2em; border-radius: 999px; font-size: .9rem; font-weight: 500;
  border: 1px solid var(--line-2); background: var(--glass); transition: border-color .3s, color .3s;
}
.nav__cta:hover { border-color: var(--cyan); }

.nav__burger { display: none; width: 40px; height: 40px; position: relative; }
.nav__burger span { position: absolute; left: 9px; right: 9px; height: 1.5px; background: var(--fg); transition: .3s; }
.nav__burger span:nth-child(1) { top: 14px; }
.nav__burger span:nth-child(2) { top: 20px; }
.nav__burger span:nth-child(3) { top: 26px; }
.nav.open .nav__burger span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav.open .nav__burger span:nth-child(2) { opacity: 0; }
.nav.open .nav__burger span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero { position: relative; min-height: 100svh; display: flex; flex-direction: column; padding-block: clamp(6rem, 11vh, 8rem) clamp(1.25rem, 3vh, 2rem); }
.hero__inner { position: relative; z-index: 2; flex: 1; min-height: 0; display: flex; flex-direction: column; justify-content: center; }
.hero__tag {
  display: inline-flex; align-items: center; gap: .7em;
  font-family: var(--mono); font-size: .74rem; letter-spacing: .2em; text-transform: uppercase;
  color: var(--fg-mid); margin-bottom: 1.6rem;
  padding: .5em 1em; border: 1px solid var(--line); border-radius: 999px;
  background: var(--glass); backdrop-filter: blur(6px);
}
.hero__tag i { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: .35; } }

.hero h1 { max-width: 18ch; margin-bottom: 1.3rem; }
.hero__sub { max-width: 52ch; font-size: clamp(1.02rem, 1.5vw, 1.22rem); color: var(--fg-mid); margin-bottom: 1.8rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }

.hero__stats {
  position: relative; z-index: 2; margin-top: clamp(2rem, 5vh, 3.5rem);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  border: 1px solid var(--line); border-radius: var(--r); overflow: hidden;
  background: var(--line);
}
.hero__stat { background: rgba(4,6,10,.55); backdrop-filter: blur(10px); padding: 1.1rem 1.3rem; }
.hero__stat b { display: block; font-size: clamp(1.5rem, 2.6vw, 2.2rem); font-weight: 600; line-height: 1.05; }
.hero__stat span { font-family: var(--mono); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--fg-dim); }

.hero__cue { position: absolute; right: var(--pad); top: 48%; z-index: 2; writing-mode: vertical-rl; font-family: var(--mono); font-size: .68rem; letter-spacing: .3em; text-transform: uppercase; color: var(--fg-dim); pointer-events: none; }

/* --------------------------------------------------------------------------
   Hakkimizda
   -------------------------------------------------------------------------- */
.about__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 5rem); margin-top: 3rem; align-items: start; }
.about__lead { font-size: clamp(1.1rem, 1.8vw, 1.4rem); color: var(--fg); line-height: 1.5; }
.about__body p { color: var(--fg-mid); margin-bottom: 1.2rem; }
.vm { display: grid; gap: 1rem; margin-top: 1rem; }
.vm__card {
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--glass); backdrop-filter: blur(6px); padding: 1.4rem 1.5rem;
  position: relative; overflow: hidden;
}
.vm__card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--grad); }
.vm__card h4 { font-family: var(--mono); font-size: .74rem; letter-spacing: .18em; text-transform: uppercase; color: var(--cyan); margin-bottom: .5rem; }
.vm__card p { color: var(--fg-mid); font-size: .98rem; }

/* --------------------------------------------------------------------------
   Faaliyet alanlari
   -------------------------------------------------------------------------- */
.focus__head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 1.5rem; margin-bottom: 3rem; }
.focus__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
.fcard {
  position: relative; border: 1px solid var(--line); border-radius: var(--r);
  padding: 2rem; overflow: hidden; min-height: 260px;
  background: var(--glass); backdrop-filter: blur(4px);
  display: flex; flex-direction: column; justify-content: space-between;
  transition: border-color .4s, transform .4s;
}
.fcard::after {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity .4s;
  background: radial-gradient(120% 120% at 0% 0%, rgba(139,92,246,.14), transparent 55%);
}
.fcard:hover { border-color: var(--line-2); transform: translateY(-4px); }
.fcard:hover::after { opacity: 1; }
.fcard__num { font-family: var(--mono); font-size: .78rem; letter-spacing: .1em; color: var(--fg-dim); }
.fcard__ico { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; border: 1px solid var(--line-2); background: var(--glass-strong); color: var(--cyan); margin-bottom: 1.2rem; }
.fcard__ico svg { width: 24px; height: 24px; }
.fcard h3 { font-size: 1.4rem; font-weight: 600; margin-bottom: .6rem; }
.fcard p { color: var(--fg-mid); font-size: .96rem; }

/* --------------------------------------------------------------------------
   Projeler — filtrelenebilir sicil
   -------------------------------------------------------------------------- */
.proj__head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 1.5rem; margin-bottom: 2rem; }
.proj__filters { display: inline-flex; gap: .4rem; border: 1px solid var(--line); border-radius: 999px; padding: .3rem; background: var(--glass); }
.proj__filters button { padding: .5em 1.1em; border-radius: 999px; font-size: .86rem; color: var(--fg-mid); transition: color .25s, background .25s; }
.proj__filters button.on { background: var(--grad); color: #04060a; font-weight: 500; }

.proj__table { border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; background: var(--glass); backdrop-filter: blur(4px); }
.proj__row {
  display: grid; grid-template-columns: 48px 1fr 130px 140px; gap: 1rem; align-items: center;
  padding: 1.1rem 1.4rem; border-top: 1px solid var(--line);
  transition: background .3s;
}
.proj__row:first-child { border-top: 0; }
.proj__row.head { color: var(--fg-dim); font-family: var(--mono); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; }
.proj__row:not(.head):hover { background: var(--glass-strong); }
.proj__no { font-family: var(--mono); color: var(--fg-dim); font-size: .9rem; }
.proj__name b { display: block; font-weight: 500; font-size: 1rem; margin-bottom: .2rem; }
.proj__name span { color: var(--fg-dim); font-size: .84rem; }
.proj__date { font-family: var(--mono); color: var(--fg-mid); font-size: .86rem; }
.proj__status { justify-self: start; font-family: var(--mono); font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; padding: .35em .8em; border-radius: 999px; border: 1px solid var(--line-2); }
.proj__status.done { color: var(--cyan); border-color: rgba(34,211,238,.4); }
.proj__status.ongoing { color: var(--violet); border-color: rgba(139,92,246,.45); }
.proj__more { text-align: center; padding: 1.2rem; }

/* --------------------------------------------------------------------------
   Referanslar
   -------------------------------------------------------------------------- */
.refs__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 1px; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; background: var(--line); margin-top: 2.5rem; }
.ref {
  background: var(--bg-2); min-height: 120px; display: grid; place-items: center; text-align: center;
  padding: 1.5rem 1rem; color: var(--fg-mid); font-weight: 500; font-size: .95rem;
  transition: background .3s, color .3s;
}
.ref:hover { background: var(--glass-strong); color: var(--fg); }

/* --------------------------------------------------------------------------
   Iletisim / CTA
   -------------------------------------------------------------------------- */
.cta__inner {
  position: relative; border: 1px solid var(--line-2); border-radius: 28px; overflow: hidden;
  padding: clamp(2.5rem, 6vw, 5rem);
  background:
    radial-gradient(120% 130% at 0% 0%, rgba(34,211,238,.14), transparent 55%),
    radial-gradient(120% 130% at 100% 100%, rgba(59,130,246,.16), transparent 55%),
    var(--glass);
  backdrop-filter: blur(10px);
  text-align: center;
}
.cta__inner .h-lg { margin: 1rem auto 1.4rem; max-width: 20ch; }
.cta__inner .lead { margin-inline: auto; margin-bottom: 2.2rem; }
.cta__actions { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer { border-top: 1px solid var(--line); padding-block: 4rem 2rem; position: relative; z-index: 2; background: rgba(4,6,10,.6); backdrop-filter: blur(10px); }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 2rem; margin-bottom: 3rem; }
.footer__grid h4 { font-family: var(--mono); font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--fg-dim); margin-bottom: 1rem; }
.footer__grid li { margin-bottom: .6rem; }
.footer__grid a { color: var(--fg-mid); transition: color .25s; }
.footer__grid a:hover { color: var(--cyan); }
.footer__brand p { color: var(--fg-mid); max-width: 34ch; margin-top: 1rem; font-size: .95rem; }
.footer__bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; padding-top: 1.5rem; border-top: 1px solid var(--line); color: var(--fg-dim); font-size: .84rem; font-family: var(--mono); letter-spacing: .04em; }

/* --------------------------------------------------------------------------
   Duyarli
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .nav__links, .nav__cta { display: none; }
  .nav__burger { display: block; }
  .nav.open .nav__links {
    display: flex; flex-direction: column; gap: 1.4rem;
    position: fixed; inset: 62px 0 auto 0; padding: 2rem var(--pad);
    background: rgba(4,6,10,.94); backdrop-filter: blur(20px); border-bottom: 1px solid var(--line);
  }
  .about__grid { grid-template-columns: 1fr; }
  .focus__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 680px) {
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .hero__cue { display: none; }
  .proj__row { grid-template-columns: 32px 1fr; }
  .proj__row .proj__date, .proj__row .proj__status { display: none; }
  .proj__row.head { display: none; }
  .footer__grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}