/* ============================================================
   BYTE AKADEMİ — Bilgi Merkezi (bilgi.php)
   Sergi / broşür havası: büyük boşluklar, cam kartlar, osiloskop hero.
   Renkler ana siteyle aynı: Void #090A0F · Fosfor #00FFA3 · Bakır #D97706
   ============================================================ */
:root {
  --void: #090A0F; --void-2: #0D0F16; --void-3: #12151E;
  --phosphor: #00FFA3; --phosphor-faint: rgba(0,255,163,.12); --phosphor-soft: rgba(0,255,163,.55);
  --copper: #D97706; --copper-bright: #F59E0B;
  --hairline: rgba(255,255,255,.07); --hairline-2: rgba(255,255,255,.14);
  --ink: #E9ECF2; --ink-dim: #A6ACBB; --ink-faint: #6A7080;
  --display: 'Geist','Segoe UI',system-ui,sans-serif;
  --mono: 'JetBrains Mono','Cascadia Mono',ui-monospace,monospace;
  --ease: cubic-bezier(.16,1,.3,1);
  --gut: clamp(20px, 5vw, 56px);
}
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; background: var(--void); }
body {
  background: var(--void); color: var(--ink); font: 400 17px/1.65 var(--display);
  -webkit-font-smoothing: antialiased; overflow-x: hidden; min-height: 100dvh;
  background-image: radial-gradient(900px 500px at 85% 12%, rgba(217,119,6,.07), transparent 70%),
                    radial-gradient(1000px 600px at 10% 40%, rgba(0,255,163,.05), transparent 70%);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
::selection { background: var(--phosphor); color: #04120C; }
:focus-visible { outline: 2px solid var(--phosphor); outline-offset: 3px; border-radius: 4px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--phosphor); color: #04120C; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

.wrap { width: min(1180px, 100% - 2 * var(--gut)); margin-inline: auto; }
.narrow { max-width: 620px; color: var(--ink-dim); }
.narrow-wrap { width: min(820px, 100% - 2 * var(--gut)); }

/* ---------- Başlık çubuğu ---------- */
.top {
  position: fixed; inset: 0 0 auto 0; z-index: 50; display: flex; align-items: center; justify-content: space-between;
  padding: 14px var(--gut); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: linear-gradient(180deg, rgba(9,10,15,.8), rgba(9,10,15,.25)); border-bottom: 1px solid var(--hairline);
}
.brand { display: flex; align-items: center; gap: 10px; font: 600 15px/1 var(--mono); letter-spacing: .06em; }
.brand b { color: var(--phosphor); font-weight: 600; }
.brand i { color: var(--ink-faint); font-style: normal; text-transform: lowercase; }
.langsw { display: flex; gap: 4px; padding: 4px; border: 1px solid var(--hairline-2); border-radius: 999px; background: rgba(255,255,255,.03); }
.langsw a { font: 500 13px/1 var(--mono); padding: 8px 12px; border-radius: 999px; color: var(--ink-dim); transition: .25s; white-space: nowrap; }
.langsw a:hover { color: var(--ink); }
.langsw a[aria-current] { background: var(--phosphor); color: #04120C; }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; overflow: hidden; padding: 120px 0 90px; }
#scope { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero-fade { position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(9,10,15,.92) 0%, rgba(9,10,15,.55) 55%, rgba(9,10,15,.15) 100%),
              linear-gradient(0deg, var(--void) 0%, transparent 25%); }
.hero-in { position: relative; z-index: 2; }
.eyebrow { font: 500 12px/1 var(--mono); letter-spacing: .18em; color: var(--phosphor); display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--phosphor); box-shadow: 0 0 14px var(--phosphor); animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .35; } }
h1 { font-weight: 700; font-size: clamp(46px, 11vw, 150px); line-height: .95; letter-spacing: -.045em; }
h1 em { font-style: normal; background: linear-gradient(100deg, var(--phosphor), #5CFFC6 40%, var(--copper-bright)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { margin-top: 30px; max-width: 580px; font-size: clamp(17px, 2.2vw, 21px); color: var(--ink-dim); }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }
.scroll-cue { position: absolute; bottom: 26px; left: 50%; translate: -50% 0; z-index: 2; width: 26px; height: 42px; border: 1.5px solid var(--hairline-2); border-radius: 14px; }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 3px; height: 8px; margin-left: -1.5px; border-radius: 2px; background: var(--phosphor); animation: cue 1.8s var(--ease) infinite; }
@keyframes cue { 0% { transform: translateY(0); opacity: 1; } 80%,100% { transform: translateY(14px); opacity: 0; } }

/* ---------- Düğmeler ---------- */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 15px 26px; border-radius: 999px; font: 600 15px/1 var(--display); transition: transform .35s var(--ease), box-shadow .35s, background .25s, border-color .25s; border: 1px solid transparent; min-height: 48px; }
.btn.primary { background: var(--phosphor); color: #04120C; box-shadow: 0 0 0 0 var(--phosphor-soft); }
.btn.primary:hover { transform: translateY(-3px); box-shadow: 0 10px 40px -8px var(--phosphor-soft); }
.btn.ghost { border-color: var(--hairline-2); background: rgba(255,255,255,.03); }
.btn.ghost:hover { border-color: var(--phosphor); color: var(--phosphor); }
.btn.big { padding: 22px 40px; font-size: clamp(16px, 2.4vw, 20px); }

/* ---------- Bölümler ---------- */
.sec { padding: clamp(80px, 13vw, 190px) 0 0; }
.kicker { font: 500 12px/1 var(--mono); letter-spacing: .2em; color: var(--copper-bright); margin-bottom: 20px; }
h2 { font-size: clamp(32px, 6vw, 72px); line-height: 1.02; letter-spacing: -.035em; font-weight: 700; margin-bottom: 28px; max-width: 14em; }
.sec p { max-width: 640px; }
.split { display: grid; grid-template-columns: 1fr; gap: 48px; align-items: start; }
@media (min-width: 900px) { .split { grid-template-columns: 1fr 1fr; gap: 80px; } }
.split p + .btn { margin-top: 26px; }
.role { color: var(--phosphor); font: 500 15px/1.6 var(--mono); }

/* ---------- Cam kartlar ---------- */
.glass {
  background: linear-gradient(145deg, rgba(255,255,255,.06), rgba(255,255,255,.015));
  border: 1px solid var(--hairline-2); border-radius: 22px;
  backdrop-filter: blur(18px) saturate(140%); -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 24px 60px -30px rgba(0,0,0,.8);
}
.cards { display: grid; gap: 18px; grid-template-columns: 1fr; margin-top: 44px; }
@media (min-width: 640px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .cards.cats, .cards.latest, .cards.labs { grid-template-columns: repeat(3, 1fr); } }
.card { position: relative; display: flex; flex-direction: column; padding: 28px; min-height: 230px; transition: transform .45s var(--ease), border-color .3s, box-shadow .3s; overflow: hidden; }
.card::before { content: ''; position: absolute; inset: 0; background: radial-gradient(420px 220px at var(--mx, 80%) var(--my, 0%), var(--phosphor-faint), transparent 70%); opacity: 0; transition: opacity .4s; pointer-events: none; }
.card:hover { transform: translateY(-6px); border-color: var(--phosphor-soft); }
.card:hover::before { opacity: 1; }
.card .no { position: absolute; right: 22px; top: 12px; font: 700 64px/1 var(--mono); color: rgba(255,255,255,.04); }
.card small { font: 500 11px/1 var(--mono); letter-spacing: .16em; color: var(--phosphor); margin-bottom: 14px; }
.card h3 { font-size: 24px; line-height: 1.2; letter-spacing: -.02em; margin-bottom: 10px; }
.card p { color: var(--ink-dim); font-size: 15px; line-height: 1.55; flex: 1; }
.card .foot { margin-top: 20px; display: flex; align-items: center; gap: 6px; font: 500 13px/1 var(--mono); color: var(--ink-dim); }
.card .foot b { color: var(--copper-bright); font-size: 18px; }
.card .foot i, .course i { margin-left: auto; font-style: normal; color: var(--phosphor); transition: translate .3s var(--ease); }
.card:hover .foot i, .course:hover i { translate: 6px 0; }

/* Sayılar */
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 44px; }
@media (min-width: 800px) { .stats { grid-template-columns: repeat(4, 1fr); } }
.stat { padding: 30px 24px; text-align: left; }
.stat b { display: block; font: 700 clamp(48px, 8vw, 92px)/1 var(--display); letter-spacing: -.05em; color: var(--phosphor); font-variant-numeric: tabular-nums; text-shadow: 0 0 40px var(--phosphor-faint); }
.stat span { font: 500 12px/1 var(--mono); letter-spacing: .18em; text-transform: uppercase; color: var(--ink-dim); }

/* Kurslar */
.stack { display: grid; gap: 16px; }
.course { display: flex; align-items: center; gap: 18px; padding: 22px; transition: transform .4s var(--ease), border-color .3s; }
.course:hover { transform: translateX(6px); border-color: var(--phosphor-soft); }
.course .ico { display: grid; place-items: center; width: 60px; height: 60px; flex: none; border-radius: 16px; background: var(--phosphor-faint); color: var(--phosphor); font: 700 20px/1 var(--mono); }
.course .ct b { display: block; font-size: 19px; line-height: 1.3; }
.course small { color: var(--ink-dim); font: 400 13px/1.4 var(--mono); }

/* Araç özellik bandı */
.feature { padding: clamp(32px, 6vw, 80px); position: relative; overflow: hidden; }
.feature::after { content: ''; position: absolute; right: -80px; top: -80px; width: 320px; height: 320px; border-radius: 50%; background: radial-gradient(circle, rgba(217,119,6,.28), transparent 70%); pointer-events: none; }
.feature h2 { max-width: 12em; }
.feature p { margin-bottom: 30px; color: var(--ink-dim); }

.bio { padding: clamp(26px, 4vw, 44px); }
.bio p { margin-bottom: 24px; }

/* SSS */
.faq { display: grid; gap: 12px; margin-top: 36px; }
.faq details { padding: 0 24px; transition: border-color .3s; }
.faq details[open] { border-color: var(--phosphor-soft); }
.faq summary { list-style: none; cursor: pointer; padding: 22px 28px 22px 0; font-weight: 600; font-size: 18px; position: relative; min-height: 48px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; position: absolute; right: 0; top: 50%; translate: 0 -50%; font: 400 28px/1 var(--mono); color: var(--phosphor); transition: rotate .35s var(--ease); }
.faq details[open] summary::after { rotate: 45deg; }
.faq details p { padding-bottom: 24px; color: var(--ink-dim); }

.mail { font: 500 clamp(18px, 4.6vw, 34px)/1.2 var(--mono); color: var(--phosphor); border-bottom: 2px solid var(--phosphor-faint); word-break: break-all; transition: border-color .3s; }
.mail:hover { border-color: var(--phosphor); }
.socials { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 22px; }
.socials a { font: 500 13px/1 var(--mono); padding: 10px 16px; border: 1px solid var(--hairline-2); border-radius: 999px; }
.socials a:hover { border-color: var(--phosphor); color: var(--phosphor); }

/* Büyük CTA */
.final { padding: clamp(100px, 16vw, 240px) 0; text-align: center; position: relative; }
.final::before { content: ''; position: absolute; inset: 10% 0 0; background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(0,255,163,.1), transparent 70%); pointer-events: none; }
.final .wrap { position: relative; }
.final h2 { max-width: none; font-size: clamp(44px, 10vw, 140px); line-height: .98; letter-spacing: -.045em; margin-bottom: 48px; }

.bottom { border-top: 1px solid var(--hairline); padding: 28px 0 40px; color: var(--ink-faint); font: 400 13px/1.5 var(--mono); }
.bottom .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.bottom a { color: var(--phosphor); }

/* ---------- Kaydırınca beliren bölümler ---------- */
.js .rv { opacity: 0; transform: translateY(34px); transition: opacity .9s var(--ease), transform .9s var(--ease); transition-delay: var(--d, 0ms); }
.js .rv.in { opacity: 1; transform: none; }

@media (max-width: 520px) {
  body { font-size: 16px; }
  .brand span { font-size: 13px; }
  .brand img { width: 24px; height: 24px; }
  .langsw a { padding: 8px 10px; font-size: 12px; }
  .hero-fade { background: linear-gradient(0deg, var(--void) 0%, rgba(9,10,15,.7) 45%, rgba(9,10,15,.5) 100%); }
  .card { min-height: 0; padding: 24px; }
  .course { padding: 16px; gap: 14px; }
  .course .ico { width: 50px; height: 50px; }
}

/* Hareket azaltma tercihi */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
  .js .rv { opacity: 1; transform: none; }
}