/* ============ Erenköy Bilgisayar — Modern 3D Tema ============ */
:root {
  --bg: #04070f;
  --bg2: #0a1228;
  --surface: rgba(255, 255, 255, .045);
  --border: rgba(255, 255, 255, .09);
  --txt: #e6edf7;
  --muted: #93a1b8;
  --accent: #22d3ee;
  --accent2: #8b5cf6;
  --wa: #25d366;
  --radius: 18px;
  --shadow: 0 20px 60px rgba(0, 0, 0, .45);
  --glow: 0 0 40px rgba(34, 211, 238, .18);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: radial-gradient(1200px 800px at 80% -10%, #101c42 0%, var(--bg) 55%) fixed, var(--bg);
  color: var(--txt);
  line-height: 1.65;
  overflow-x: hidden;
}
h1, h2, h3, h4 { font-family: 'Sora', sans-serif; line-height: 1.2; }
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
.container { width: min(1180px, 92%); margin-inline: auto; }
.center { text-align: center; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 8px; top: 8px; background: var(--accent); color: #04121a; padding: 8px 14px; border-radius: 8px; z-index: 999; }

.glass {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border-radius: 12px;
  font-weight: 600; font-size: .95rem; cursor: pointer; border: 0;
  transition: transform .2s, box-shadow .25s, background .25s;
  will-change: transform;
}
.btn-lg { padding: 15px 30px; font-size: 1.05rem; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #38bdf8 50%, var(--accent2) 130%);
  color: #051019; box-shadow: 0 8px 26px rgba(34, 211, 238, .35);
}
.btn-primary:hover { transform: translateY(-3px) scale(1.02); box-shadow: 0 14px 36px rgba(34, 211, 238, .5); }
.btn-ghost { background: rgba(255,255,255,.06); color: var(--txt); border: 1px solid var(--border); }
.btn-ghost:hover { transform: translateY(-3px); background: rgba(255,255,255,.12); border-color: rgba(34,211,238,.5); }
.btn-wa { background: var(--wa); color: #04120a; box-shadow: 0 8px 26px rgba(37, 211, 102, .35); }
.btn-wa:hover { transform: translateY(-3px); box-shadow: 0 14px 36px rgba(37, 211, 102, .5); }

.chip {
  display: inline-block; padding: 6px 16px; border-radius: 999px;
  background: rgba(34, 211, 238, .1); border: 1px solid rgba(34, 211, 238, .3);
  color: var(--accent); font-size: .82rem; font-weight: 600; letter-spacing: .4px;
  margin-bottom: 18px;
}
.grad-txt {
  background: linear-gradient(120deg, var(--accent), #7dd3fc 45%, var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.topbar { background: rgba(255,255,255,.03); border-bottom: 1px solid var(--border); font-size: .8rem; }
.topbar-in { display: flex; gap: 22px; padding: 7px 0; flex-wrap: wrap; justify-content: center; }
.topbar-item { color: var(--muted); }
a.topbar-item:hover { color: var(--accent); }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(4, 7, 15, .75);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s;
}
.site-header.scrolled { box-shadow: 0 10px 40px rgba(0,0,0,.5); }
.header-in { display: flex; align-items: center; gap: 24px; padding: 13px 0; }
.brand { display: flex; align-items: center; gap: 11px; color: var(--txt); }
.brand img { filter: drop-shadow(0 0 8px rgba(34,211,238,.4)); }
.brand-txt { display: flex; flex-direction: column; line-height: 1.15; }
.brand-txt strong { font-family: 'Sora'; font-size: 1.02rem; }
.brand-txt small { color: var(--muted); font-size: .72rem; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a {
  color: var(--muted); padding: 8px 13px; border-radius: 9px;
  font-size: .92rem; font-weight: 500; transition: color .2s, background .2s;
}
.nav a:hover, .nav a.on { color: var(--txt); background: rgba(34, 211, 238, .1); }
.nav a.on { color: var(--accent); }
.header-cta { display: flex; gap: 10px; }
.burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.burger span { display: block; width: 24px; height: 2.5px; background: var(--txt); margin: 5px 0; border-radius: 2px; transition: .3s; }

.hero { position: relative; padding: 90px 0 70px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.orb { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .5; animation: float 12s ease-in-out infinite; }
.orb-1 { width: 420px; height: 420px; background: rgba(34, 211, 238, .25); top: -120px; right: -60px; }
.orb-2 { width: 340px; height: 340px; background: rgba(139, 92, 246, .28); bottom: -100px; left: -80px; animation-delay: -4s; }
.orb-3 { width: 220px; height: 220px; background: rgba(56, 189, 248, .2); top: 40%; left: 45%; animation-delay: -8s; }
@keyframes float { 0%,100% { transform: translateY(0) } 50% { transform: translateY(-34px) } }
.grid-overlay {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
}
.hero-in { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 50px; align-items: center; }
.hero h1 { font-size: clamp(2.1rem, 4.6vw, 3.6rem); font-weight: 800; margin: 6px 0 20px; }
.lead { color: var(--muted); font-size: 1.12rem; max-width: 56ch; }
.hero-btns { display: flex; gap: 14px; margin: 30px 0 24px; flex-wrap: wrap; }
.hero-badges { display: flex; gap: 18px; flex-wrap: wrap; color: var(--muted); font-size: .88rem; }

.hero-visual { perspective: 1000px; }
.hero-card {
  position: relative; padding: 34px; box-shadow: var(--shadow), var(--glow);
  transform-style: preserve-3d;
}
.hero-card img { width: 100%; transform: translateZ(30px); }
.hero-mini {
  position: absolute; padding: 12px 16px; font-size: .8rem;
  display: flex; flex-direction: column; box-shadow: var(--shadow);
  transform: translateZ(60px); animation: bob 6s ease-in-out infinite;
}
.hero-mini strong { font-size: .88rem; }
.hero-mini small { color: var(--muted); }
.mini-1 { top: -18px; left: -26px; }
.mini-2 { bottom: 34px; right: -30px; animation-delay: -2s; }
.mini-3 { bottom: -20px; left: 12%; animation-delay: -4s; }
@keyframes bob { 0%,100% { margin-top: 0 } 50% { margin-top: -12px } }

.tilt { transform-style: preserve-3d; transition: transform .18s ease-out, box-shadow .3s; }

.section { padding: 72px 0; position: relative; }
.sec-head { text-align: center; max-width: 720px; margin: 0 auto 46px; }
.sec-head h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); margin-bottom: 14px; }
.sec-head p { color: var(--muted); }

.stats { padding: 30px 0 20px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { text-align: center; padding: 28px 16px; box-shadow: var(--shadow); }
.stat-ico { font-size: 1.7rem; display: block; margin-bottom: 8px; }
.stat-num, .stat-suffix { font-family: 'Sora'; font-size: 2.2rem; font-weight: 800; color: var(--accent); }
.stat p { color: var(--muted); font-size: .9rem; margin-top: 4px; }

.cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 34px; }
.card {
  display: flex; flex-direction: column; gap: 10px; padding: 30px 26px;
  color: var(--txt); position: relative; overflow: hidden; box-shadow: var(--shadow);
}
.card::before {
  content: ''; position: absolute; inset: 0; opacity: 0; transition: opacity .35s;
  background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 50%), rgba(34,211,238,.12), transparent 65%);
  pointer-events: none;
}
.card:hover::before { opacity: 1; }
.card-ico { font-size: 2.1rem; filter: drop-shadow(0 0 12px rgba(34,211,238,.35)); }
.card h3 { font-size: 1.15rem; }
.card p { color: var(--muted); font-size: .93rem; flex: 1; }
.card-more { color: var(--accent); font-weight: 600; font-size: .9rem; }
.price-note { color: #fbbf24; font-size: .85rem; font-weight: 600; }
.price-note.big { font-size: 1.05rem; }
.card-post { padding: 0; }
.card-img { height: 190px; overflow: hidden; border-radius: var(--radius) var(--radius) 0 0; }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.card-post:hover .card-img img { transform: scale(1.06); }
.card-post .card-body { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 9px; }
.post-date { color: var(--accent); font-size: .78rem; font-weight: 600; letter-spacing: .5px; }

.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.why-item { padding: 30px 22px; text-align: center; box-shadow: var(--shadow); }
.why-item span { font-size: 2rem; display: block; margin-bottom: 12px; }
.why-item h3 { font-size: 1.02rem; margin-bottom: 8px; }
.why-item p { color: var(--muted); font-size: .88rem; }

/* ---- Testimonials / Slider ---- */
.stars { color: #fbbf24; letter-spacing: 3px; font-size: 1.05rem; }
.t-name { color: var(--accent); font-size: .9rem; }
.t-slider { position: relative; display: flex; align-items: stretch; gap: 10px; }
.t-track {
  display: flex; gap: 20px; overflow-x: auto; scroll-snap-type: x mandatory;
  scroll-behavior: smooth; padding: 6px 2px 18px; flex: 1;
  scrollbar-width: none; -ms-overflow-style: none;
}
.t-track::-webkit-scrollbar { display: none; }
.t-card {
  min-width: min(360px, 82vw); max-width: 360px; scroll-snap-align: start;
  padding: 26px 24px; display: flex; flex-direction: column; gap: 10px;
  position: relative; box-shadow: var(--shadow);
}
.t-body { color: var(--muted); font-size: .92rem; flex: 1; }
.t-src {
  position: absolute; top: 18px; right: 18px; width: 26px; height: 26px;
  border-radius: 50%; background: #fff; color: #4285f4; font-weight: 800;
  display: flex; align-items: center; justify-content: center; font-size: .95rem;
  font-family: 'Sora'; box-shadow: 0 2px 8px rgba(0,0,0,.4);
}
.t-arrow {
  align-self: center; width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--border); background: rgba(255,255,255,.06);
  color: var(--txt); font-size: 1.5rem; cursor: pointer; flex-shrink: 0;
  transition: background .2s, border-color .2s;
}
.t-arrow:hover { background: rgba(34,211,238,.15); border-color: var(--accent); }
.t-ctas { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 8px; }
@media (max-width: 720px) { .t-arrow { display: none; } }

.page-head { padding: 74px 0 20px; text-align: center; position: relative; }
.page-head h1 { font-size: clamp(1.9rem, 4vw, 3rem); font-weight: 800; }
.page-head p { color: var(--muted); margin-top: 12px; }
.err-page { padding: 110px 0 60px; }
.err-code { font-size: clamp(5rem, 14vw, 9rem); font-weight: 800; }
.center-btns { justify-content: center; }

.svc-layout { display: grid; grid-template-columns: 1fr 330px; gap: 26px; align-items: start; }
.svc-body { padding: 38px; box-shadow: var(--shadow); }
.svc-img { border-radius: 12px; margin-bottom: 26px; }
.rich h3 { margin: 26px 0 10px; font-size: 1.25rem; }
.rich p { margin-bottom: 14px; color: #c3cede; }
.rich ul { margin: 0 0 16px 22px; color: #c3cede; }
.rich li { margin-bottom: 7px; }
.svc-cta { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.side-box { padding: 26px; margin-bottom: 22px; box-shadow: var(--shadow); }
.side-box h3 { margin-bottom: 14px; font-size: 1.05rem; }
.side-list { list-style: none; }
.side-list li { border-bottom: 1px solid var(--border); }
.side-list li:last-child { border: 0; }
.side-list a { display: block; padding: 10px 2px; color: var(--muted); font-size: .92rem; transition: color .2s, padding-left .2s; }
.side-list a:hover { color: var(--accent); padding-left: 8px; }
.side-box p { color: var(--muted); font-size: .92rem; margin-bottom: 10px; }

.about-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 26px; align-items: start; }
.about-img img { box-shadow: var(--shadow), var(--glow); }

.blog-single { max-width: 860px; }

.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.g-item { overflow: hidden; cursor: zoom-in; position: relative; box-shadow: var(--shadow); }
.g-item img { width: 100%; height: 240px; object-fit: cover; transition: transform .5s; }
.g-item:hover img { transform: scale(1.07); }
.g-item figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 26px 16px 12px;
  background: linear-gradient(transparent, rgba(4,7,15,.9)); font-size: .85rem;
}
.lightbox {
  position: fixed; inset: 0; z-index: 300; background: rgba(2,4,10,.92);
  display: flex; align-items: center; justify-content: center; padding: 4vh 4vw;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 12px; box-shadow: var(--shadow); }
.lb-close { position: absolute; top: 18px; right: 24px; background: none; border: 0; color: #fff; font-size: 1.8rem; cursor: pointer; }

.faq-wrap { max-width: 820px; }
.faq { margin-bottom: 14px; overflow: hidden; }
.faq summary {
  list-style: none; cursor: pointer; padding: 20px 24px; font-weight: 600;
  font-family: 'Sora'; display: flex; justify-content: space-between; align-items: center; gap: 14px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq-arrow { transition: transform .3s; color: var(--accent); }
.faq[open] .faq-arrow { transform: rotate(180deg); }
.faq p { padding: 0 24px 20px; color: var(--muted); }

.contact-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 26px; margin-bottom: 40px; }
.contact-info p { margin-bottom: 16px; }
.contact-form { display: flex; flex-direction: column; gap: 14px; }
.contact-form label { display: flex; flex-direction: column; gap: 6px; font-size: .88rem; color: var(--muted); font-weight: 500; }
.contact-form input, .contact-form textarea {
  background: rgba(255,255,255,.05); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 14px; color: var(--txt); font: inherit; font-size: .95rem;
  transition: border-color .2s, box-shadow .2s;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(34,211,238,.15);
}
.hp { position: absolute !important; left: -9999px !important; height: 0; width: 0; opacity: 0; }
.wa-note { color: var(--muted); font-size: .85rem; margin-bottom: 14px; padding: 10px 12px; background: rgba(37,211,102,.08); border: 1px solid rgba(37,211,102,.25); border-radius: 10px; }
.transit-note { color: var(--muted); }
.form-ok { background: rgba(37,211,102,.12); border: 1px solid rgba(37,211,102,.4); border-radius: 10px; padding: 13px 16px; margin-bottom: 16px; font-size: .93rem; }
.map-wrap h3 { margin-bottom: 18px; font-size: 1.3rem; }
.map-frame { overflow: hidden; height: 420px; box-shadow: var(--shadow); }
.map-frame iframe { width: 100%; height: 100%; border: 0; filter: grayscale(.2) contrast(1.05); }
.map-wrap .btn { margin-top: 18px; }
.amenity-chips { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.amenity-chips .btn { margin-top: 0; }

.cta-band { padding: 30px 0 72px; }
.cta-band-in {
  display: flex; align-items: center; justify-content: space-between; gap: 26px; flex-wrap: wrap;
  padding: 44px 46px; border-radius: 24px;
  background: linear-gradient(135deg, rgba(34,211,238,.14), rgba(139,92,246,.14));
  border: 1px solid rgba(34,211,238,.3); box-shadow: var(--glow);
}
.cta-band h2 { font-size: 1.6rem; margin-bottom: 8px; }
.cta-band p { color: var(--muted); }
.cta-band-btns { display: flex; gap: 14px; flex-wrap: wrap; }

.site-footer { border-top: 1px solid var(--border); background: rgba(255,255,255,.02); padding-top: 56px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.1fr; gap: 36px; padding-bottom: 40px; }
.f-col h4 { font-size: .95rem; margin-bottom: 16px; color: var(--txt); }
.f-col ul { list-style: none; }
.f-col li { margin-bottom: 9px; font-size: .89rem; color: var(--muted); }
.f-col a { color: var(--muted); transition: color .2s; }
.f-col a:hover { color: var(--accent); }
.f-about { color: var(--muted); font-size: .89rem; margin: 14px 0; }
.socials { display: flex; gap: 12px; }
.socials a { font-size: .85rem; padding: 6px 12px; border: 1px solid var(--border); border-radius: 8px; }
.socials a:hover { border-color: var(--accent); }
.f-contact li { line-height: 1.5; }
.f-bottom { border-top: 1px solid var(--border); padding: 18px 0; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; font-size: .8rem; color: var(--muted); }

.wa-float {
  position: fixed; right: 22px; bottom: 22px; z-index: 200;
  width: 58px; height: 58px; border-radius: 50%;
  background: var(--wa); display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 30px rgba(37,211,102,.45); animation: pulse 2.6s infinite;
  transition: transform .2s;
}
.wa-float:hover { transform: scale(1.1); }
@keyframes pulse {
  0% { box-shadow: 0 10px 30px rgba(37,211,102,.45), 0 0 0 0 rgba(37,211,102,.4); }
  70% { box-shadow: 0 10px 30px rgba(37,211,102,.45), 0 0 0 18px rgba(37,211,102,0); }
  100% { box-shadow: 0 10px 30px rgba(37,211,102,.45), 0 0 0 0 rgba(37,211,102,0); }
}

.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.vis { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .orb, .hero-mini, .wa-float { animation: none; }
}

@media (max-width: 1024px) {
  .hero-in { grid-template-columns: 1fr; }
  .hero-visual { max-width: 520px; margin: 20px auto 0; }
  .cards-grid, .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid, .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .svc-layout, .about-layout, .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .header-cta { display: none; }
}
@media (max-width: 720px) {
  .nav {
    position: fixed; inset: 0; top: 0; background: rgba(4,7,15,.97); z-index: 150;
    flex-direction: column; justify-content: center; align-items: center; gap: 10px;
    opacity: 0; pointer-events: none; transition: opacity .3s;
  }
  .nav.open { opacity: 1; pointer-events: auto; }
  .nav a { font-size: 1.25rem; padding: 12px 26px; }
  .burger { display: block; margin-left: auto; z-index: 200; position: relative; }
  .burger.x span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
  .burger.x span:nth-child(2) { opacity: 0; }
  .burger.x span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }
  .cards-grid, .gallery-grid, .why-grid, .stats-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 44px; }
  .hero-mini { display: none; }
  .section { padding: 52px 0; }
  .svc-body { padding: 26px 20px; }
  .cta-band-in { padding: 32px 24px; }
  .topbar-in { justify-content: flex-start; gap: 12px; }
  .topbar-item:nth-child(2) { display: none; }
}


/* ===== Tema Sistemi (acik/koyu) ===== */
html[data-theme="light"]{
  --bg:#eef2f8; --bg2:#ffffff; --surface:#ffffff;
  --border:rgba(20,40,80,.10); --txt:#16233a; --muted:#566581;
  --accent:#0284c7; --accent2:#f59e0b;
  --shadow:0 16px 40px rgba(20,40,90,.10);
  --glow:0 0 38px rgba(2,132,199,.10);
}
html[data-theme="light"] body{
  background:radial-gradient(1100px 700px at 82% -10%, #dce9fb 0%, var(--bg) 55%) fixed, var(--bg);
}
html[data-theme="light"] .rich p,
html[data-theme="light"] .rich ul,
html[data-theme="light"] .rich li{ color:var(--txt); }
html[data-theme="light"] .hero-bg{ opacity:.12; }
html[data-theme="light"] .glass{ background:rgba(255,255,255,.85); }
.theme-toggle{ background:var(--surface); border:1px solid var(--border); color:var(--txt); width:42px; height:42px; border-radius:50%; cursor:pointer; font-size:1.05rem; display:inline-flex; align-items:center; justify-content:center; transition:transform .2s, box-shadow .2s; }
.theme-toggle:hover{ transform:translateY(-2px); box-shadow:var(--shadow); }

/* Acik tema - header/nav duzeltmeleri */
html[data-theme="light"] .site-header{ background:rgba(255,255,255,.80)!important; border-bottom:1px solid var(--border); }
html[data-theme="light"] .site-header.scrolled{ background:rgba(255,255,255,.93)!important; box-shadow:0 6px 24px rgba(20,40,90,.08); }
html[data-theme="light"] .topbar{ background:rgba(255,255,255,.55); border-bottom:1px solid var(--border); }
html[data-theme="light"] .nav a{ color:var(--txt); }
html[data-theme="light"] .nav a:hover, html[data-theme="light"] .nav a.on{ color:var(--accent); }
html[data-theme="light"] .btn-ghost{ color:var(--txt)!important; border-color:var(--border); }
html[data-theme="light"] .menu-toggle, html[data-theme="light"] .nav-toggle, html[data-theme="light"] .hamburger{ color:var(--txt)!important; }
html[data-theme="light"] .logo-txt small, html[data-theme="light"] .brand small{ color:var(--muted); }