/* ==========================================================================
   ÇELİKAR AUTO — car.celikar.com
   Bağımsız otomotiv yedek parça sitesi · premium dark-grafit + kırmızı
   Hiçbir portföy sitesiyle stil paylaşmaz (bambaşka oluşum).
   ========================================================================== */

:root{
  --ink:#0c0f14;          /* near-black graphite */
  --ink-2:#11151c;
  --panel:#161b22;
  --panel-2:#1c222b;
  --line:#252c37;
  --line-soft:#1e242d;
  --red:#d81f2b;          /* signature — rafine, daha az neon */
  --red-2:#f0323f;
  --red-dark:#9e1019;
  --amber:#f5a524;        /* trust accent */
  --text:#e9eef5;
  --muted:#98a2b0;
  --muted-2:#6c7583;
  --white:#ffffff;
  --ok:#31c48d;
  --radius:14px;
  --radius-lg:22px;
  --shadow:0 18px 50px -18px rgba(0,0,0,.65);
  --shadow-red:0 12px 32px -14px rgba(216,31,43,.32);
  --maxw:1180px;
  --ff-body:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --ff-head:"Sora",var(--ff-body);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--ink);color:var(--text);
  font-family:var(--ff-body);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--ff-head);font-weight:800;line-height:1.12;letter-spacing:-.02em;margin:0}
p{margin:0}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.center{text-align:center}

/* accent word */
.accent{color:var(--red)}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--ff-head);font-weight:700;font-size:.72rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--red-2);
  padding:7px 14px;border:1px solid rgba(225,29,42,.32);border-radius:100px;
  background:rgba(225,29,42,.07);
}
.kicker::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red);box-shadow:0 0 10px var(--red)}

/* ---------- buttons ---------- */
.btn{
  --bg:var(--red);
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:var(--ff-head);font-weight:700;font-size:.98rem;
  padding:14px 26px;border-radius:100px;border:1px solid transparent;
  background:var(--bg);color:#fff;cursor:pointer;text-decoration:none;
  transition:transform .18s ease,box-shadow .25s ease,background .2s ease;
  white-space:nowrap;
}
/* prose içindeki butonlar link stilini almasın (kırmızı-üstüne-kırmızı bug'ı) */
.prose a.btn{color:#fff;text-decoration:none}
.prose a.btn.ghost{color:var(--text)}
.prose a.btn:hover{text-decoration:none;color:#fff}
.cta-band a.btn,.cta-band .btn{color:var(--red-dark)}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-red)}
.btn.red{background:linear-gradient(135deg,var(--red-2),var(--red-dark))}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn.ghost:hover{border-color:var(--red);box-shadow:none;background:rgba(225,29,42,.06)}
.btn.lg{padding:17px 34px;font-size:1.05rem}
.btn svg{width:18px;height:18px}

/* ---------- header ---------- */
header.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;
  border-bottom:1px solid transparent;
}
header.nav.scrolled{
  background:rgba(12,15,20,.82);backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line-soft);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--ff-head);font-weight:800;font-size:1.32rem;letter-spacing:-.03em}
.brand .mark{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--red-2),var(--red-dark));box-shadow:var(--shadow-red);
}
.brand .mark svg{width:22px;height:22px}
.brand small{display:block;font-family:var(--ff-body);font-weight:600;font-size:.6rem;letter-spacing:.22em;color:var(--muted);margin-top:1px}
.brand-logo{height:27px;width:auto;display:block}
.brand-tag{font-family:var(--ff-head);font-weight:700;font-size:.58rem;letter-spacing:.2em;color:var(--red-2);background:rgba(216,31,43,.09);border:1px solid rgba(216,31,43,.34);padding:3px 7px;border-radius:5px;line-height:1;text-transform:uppercase}
footer .brand-logo{height:26px}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{
  font-weight:600;font-size:.93rem;color:var(--muted);padding:9px 12px;border-radius:9px;white-space:nowrap;
  transition:color .2s,background .2s;
}
.nav-links a:hover,.nav-links a.active{color:var(--white);background:rgba(255,255,255,.05)}
.nav-cta{display:flex;align-items:center;gap:12px}
.hamburger{display:none;background:none;border:0;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.hamburger span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.25s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;padding:170px 0 90px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;background:#0a0d12 url(/assets/hero-engine.jpg) center right/cover no-repeat}
.hero-bg::before{ /* gerçek motor görseli üstüne premium karartma + kırmızı vurgu */
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(1000px 520px at 85% 6%,rgba(216,31,43,.26),transparent 55%),
    linear-gradient(100deg,rgba(10,13,18,.975) 0%,rgba(10,13,18,.93) 44%,rgba(10,13,18,.82) 76%,rgba(10,13,18,.72) 100%),
    linear-gradient(180deg,transparent 68%,#0c0f14 100%);
}
.hero-grid{ /* subtle tech grid */
  position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:52px 52px;mask-image:radial-gradient(900px 500px at 70% 20%,#000,transparent 75%);
}
.hero-in{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center}
.hero h1{font-size:clamp(2.3rem,5vw,3.7rem);margin:22px 0 18px}
.hero .lede{font-size:1.16rem;color:var(--muted);max-width:560px;margin-bottom:30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-trust{display:flex;gap:26px;margin-top:34px;flex-wrap:wrap}
.hero-trust .t{display:flex;flex-direction:column}
.hero-trust .t b{font-family:var(--ff-head);font-size:1.5rem;color:var(--white);line-height:1}
.hero-trust .t span{font-size:.82rem;color:var(--muted-2);margin-top:4px}

/* hero art card */
.hero-art{position:relative}
.hero-card{
  background:linear-gradient(160deg,var(--panel),var(--ink-2));
  border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow);
  position:relative;overflow:hidden;
}
.hero-card::before{content:"";position:absolute;top:-40%;right:-30%;width:70%;height:80%;background:radial-gradient(circle,rgba(225,29,42,.22),transparent 70%)}
.hero-card h3{font-size:1.05rem;margin-bottom:4px;position:relative}
.hero-card .sub{font-size:.85rem;color:var(--muted);margin-bottom:18px;position:relative}
.mini-field{background:var(--ink);border:1px solid var(--line);border-radius:10px;padding:11px 14px;margin-bottom:10px;display:flex;align-items:center;gap:11px;position:relative}
.mini-field svg{width:17px;height:17px;color:var(--red-2);flex:0 0 auto}
.mini-field span{font-size:.9rem;color:var(--muted)}
.mini-field .val{color:var(--text);font-weight:600;margin-left:auto;font-size:.85rem}
.hero-card .btn{width:100%;margin-top:6px;position:relative}

/* ---------- brand marquee ---------- */
.marquee-sec{padding:34px 0;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);background:var(--ink-2)}
.marquee-lbl{text-align:center;font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted-2);margin-bottom:22px;font-weight:600}
.marquee{display:flex;overflow:hidden;mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee-track{display:flex;gap:56px;align-items:center;animation:scroll 34s linear infinite;padding-right:56px}
.marquee:hover .marquee-track{animation-play-state:paused}
.marquee-track span{font-family:var(--ff-head);font-weight:800;font-size:1.5rem;color:#4a5361;white-space:nowrap;letter-spacing:.02em;transition:color .3s}
.marquee-track span:hover{color:var(--text)}
@keyframes scroll{to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
section{position:relative}
.sec{padding:88px 0}
.sec-head{max-width:640px;margin:0 auto 52px;text-align:center}
.sec-head h2{font-size:clamp(1.9rem,3.6vw,2.7rem);margin:16px 0 14px}
.sec-head p{color:var(--muted);font-size:1.05rem}

/* category grid */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:16px}
.cat{
  background:linear-gradient(160deg,var(--panel),var(--ink-2));border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 22px;transition:transform .2s,border-color .2s,box-shadow .25s;
  position:relative;overflow:hidden;cursor:default;
}
.cat:hover{transform:translateY(-4px);border-color:rgba(225,29,42,.4);box-shadow:var(--shadow)}
.cat .ico{width:50px;height:50px;border-radius:12px;display:grid;place-items:center;background:rgba(225,29,42,.1);border:1px solid rgba(225,29,42,.22);margin-bottom:16px}
.cat .ico svg{width:26px;height:26px;color:var(--red-2)}
.cat h3{font-size:1.12rem;margin-bottom:7px}
.cat p{font-size:.9rem;color:var(--muted)}

/* how it works */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step{position:relative;padding:30px 26px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius)}
.step .num{font-family:var(--ff-head);font-weight:800;font-size:2.6rem;color:transparent;-webkit-text-stroke:1.5px var(--red);line-height:1;margin-bottom:14px;display:block}
.step h3{font-size:1.18rem;margin-bottom:9px}
.step p{color:var(--muted);font-size:.95rem}
.step:not(:last-child)::after{content:"";position:absolute;top:50%;right:-15px;width:22px;height:2px;background:var(--line);z-index:2}

/* advantages */
.adv-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.adv{display:flex;gap:16px;padding:24px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);transition:border-color .2s}
.adv:hover{border-color:rgba(225,29,42,.35)}
.adv .ico{flex:0 0 auto;width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,var(--red-2),var(--red-dark));box-shadow:var(--shadow-red)}
.adv .ico svg{width:24px;height:24px;color:#fff}
.adv h3{font-size:1.06rem;margin-bottom:6px}
.adv p{font-size:.9rem;color:var(--muted)}

/* trust strip */
.trust{background:linear-gradient(120deg,var(--panel),var(--ink-2));border:1px solid var(--line);border-radius:var(--radius-lg);padding:40px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.trust .t b{font-family:var(--ff-head);font-size:2.2rem;color:var(--white);display:block}
.trust .t span{color:var(--muted);font-size:.9rem}

/* CTA band */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--red-dark),#7a0b12);border-radius:var(--radius-lg);padding:60px 50px;text-align:center}
.cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 80% -20%,rgba(255,255,255,.14),transparent 60%)}
.cta-band h2{font-size:clamp(1.8rem,3.4vw,2.5rem);color:#fff;position:relative;margin-bottom:14px}
.cta-band p{color:rgba(255,255,255,.9);position:relative;margin-bottom:28px;font-size:1.08rem}
.cta-band .btn{background:#fff;color:var(--red-dark)}
.cta-band .btn:hover{box-shadow:0 14px 40px -12px rgba(0,0,0,.5)}

/* ---------- forms (RFQ) ---------- */
.form-wrap{max-width:820px;margin:0 auto;background:linear-gradient(160deg,var(--panel),var(--ink-2));border:1px solid var(--line);border-radius:var(--radius-lg);padding:38px;box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:2px}
.field.full{grid-column:1/-1}
.field label{font-size:.85rem;font-weight:600;color:var(--text)}
.field label .req{color:var(--red-2)}
.field input,.field select,.field textarea{
  background:var(--ink);border:1px solid var(--line);border-radius:10px;color:var(--text);
  padding:12px 14px;font-family:var(--ff-body);font-size:.95rem;transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(225,29,42,.15)}
.field textarea{resize:vertical;min-height:110px}
.field .hint{font-size:.76rem;color:var(--muted-2)}
.field select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='none' stroke='%2398a2b0' stroke-width='2' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:38px}
.check{display:flex;gap:11px;align-items:flex-start;font-size:.85rem;color:var(--muted);grid-column:1/-1;margin:6px 0}
.check input{width:18px;height:18px;margin-top:2px;accent-color:var(--red)}
.check a{color:var(--red-2);text-decoration:underline}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.form-msg{display:none;padding:16px 18px;border-radius:12px;margin-bottom:20px;font-weight:600}
.form-msg.ok{display:block;background:rgba(49,196,141,.12);border:1px solid rgba(49,196,141,.4);color:var(--ok)}
.form-msg.err{display:block;background:rgba(225,29,42,.12);border:1px solid rgba(225,29,42,.4);color:var(--red-2)}

/* ---------- footer ---------- */
footer.ft{background:var(--ink-2);border-top:1px solid var(--line-soft);padding:60px 0 28px;margin-top:20px}
.ft-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;margin-bottom:44px}
.ft-brand p{color:var(--muted);font-size:.92rem;margin:16px 0;max-width:300px}
.ft-col h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.12em;color:var(--muted-2);margin-bottom:16px}
.ft-col a{display:block;color:var(--muted);font-size:.92rem;padding:5px 0;transition:color .2s}
.ft-col a:hover{color:var(--red-2)}
.ft-contact a{display:flex;gap:9px;align-items:center}
.ft-contact svg{width:16px;height:16px;color:var(--red-2)}
.ft-bottom{border-top:1px solid var(--line-soft);padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted-2);font-size:.85rem}
.ft-bottom .socials{display:flex;gap:10px}
.ft-bottom .socials a{width:34px;height:34px;border-radius:9px;border:1px solid var(--line);display:grid;place-items:center;transition:.2s}
.ft-bottom .socials a:hover{border-color:var(--red);background:rgba(225,29,42,.08)}
.ft-bottom .socials svg{width:17px;height:17px;color:var(--muted)}

/* ---------- page hero (interior pages) ---------- */
.page-hero{padding:150px 0 56px;position:relative;overflow:hidden;border-bottom:1px solid var(--line-soft);background:#0a0d12 url(/assets/hero-engine.jpg) center/cover}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(800px 400px at 82% -10%,rgba(216,31,43,.20),transparent 60%),linear-gradient(100deg,rgba(10,13,18,.975) 0%,rgba(10,13,18,.92) 55%,rgba(10,13,18,.86) 100%)}
.page-hero .container{position:relative}
.page-hero h1{font-size:clamp(2rem,4vw,3rem);margin:16px 0 12px}
.page-hero p{color:var(--muted);font-size:1.08rem;max-width:620px}
.breadcrumb{font-size:.85rem;color:var(--muted-2)}
.breadcrumb a:hover{color:var(--red-2)}

/* prose (legal/about) */
.prose{max-width:820px;margin:0 auto}
.prose h2{font-size:1.5rem;margin:38px 0 14px;color:var(--white)}
.prose h3{font-size:1.15rem;margin:26px 0 10px}
.prose p,.prose li{color:var(--muted);margin-bottom:12px}
.prose ul{padding-left:22px;margin-bottom:16px}
.prose a{color:var(--red-2);text-decoration:underline}
.prose .todo{background:rgba(245,165,36,.1);border:1px dashed var(--amber);color:var(--amber);padding:2px 8px;border-radius:6px;font-size:.85em;font-weight:600}
.prose .box{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:22px;margin:22px 0}

/* brand hub cards */
.brand-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px}
.brand-card{display:flex;flex-direction:column;align-items:center;gap:12px;padding:26px 18px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);transition:transform .2s,border-color .2s;text-align:center}
.brand-card:hover{transform:translateY(-4px);border-color:rgba(225,29,42,.4)}
.brand-card .bn{font-family:var(--ff-head);font-weight:800;font-size:1.15rem}
.brand-card .bp{font-size:.8rem;color:var(--muted)}

/* ---------- responsive ---------- */
@media(max-width:1024px){
  .hero-in{grid-template-columns:1fr;gap:38px}
  .hero-art{max-width:440px}
  .steps{grid-template-columns:1fr}
  .step:not(:last-child)::after{display:none}
  .trust{grid-template-columns:repeat(2,1fr);gap:28px}
  .ft-grid{grid-template-columns:1fr 1fr;gap:28px}
  .nav-links{display:none;position:absolute;top:74px;left:0;right:0;flex-direction:column;background:rgba(12,15,20,.97);backdrop-filter:blur(14px);padding:14px 22px;gap:2px;border-bottom:1px solid var(--line)}
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 10px;width:100%}
  .hamburger{display:flex}
  .form-grid{grid-template-columns:1fr}
}
@media(max-width:560px){
  .hero{padding:140px 0 70px}
  .sec{padding:64px 0}
  .form-wrap{padding:24px}
  .cta-band{padding:44px 26px}
  .trust{grid-template-columns:1fr 1fr}
  .ft-grid{grid-template-columns:1fr}
  .hero-trust{gap:20px}
}