/* ============================================================
   Samsung Yedek Parça — stil
   Mobil öncelikli, hızlı, sade.
   ============================================================ */
:root{
  --bg:#f6f8fb;
  --surface:#ffffff;
  --ink:#0f1720;
  --muted:#5b6672;
  --line:#e5e9f0;
  --brand:#8b1622;        /* BTSH logo kırmızısı */
  --brand-dark:#6f111b;   /* koyu kırmızı (hover) */
  --ink-dark:#1a1618;     /* sıcak koyu nötr (hero/footer) */
  --wa:#25d366;           /* WhatsApp yeşili */
  --wa-dark:#1da851;
  --ok:#0f9d58;
  --warn:#b45309;
  --radius:14px;
  --shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.06);
  --wrap:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  line-height:1.5;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 18px}

/* ---------- Butonlar ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;justify-content:center;
  border:0;cursor:pointer;font-weight:700;font-size:15px;
  padding:11px 16px;border-radius:11px;transition:.15s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-wa{background:var(--wa);color:#04310f}
.btn-wa:hover{background:var(--wa-dark);color:#fff}
.btn-call{background:var(--brand);color:#fff}
.btn-call:hover{background:var(--brand-dark)}
.btn-ghost{background:#eef1f7;color:var(--ink)}
.btn-ghost:hover{background:#e3e8f2}
.btn-sm{padding:9px 12px;font-size:14px;border-radius:10px}
.btn-block{width:100%}
.btn-icon{padding-left:0;padding-right:0;width:44px}
.btn-icon svg{width:20px;height:20px}

/* ---------- Header ---------- */
.hdr{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hdr-in{display:flex;align-items:center;gap:14px;height:64px}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:38px;width:auto;display:block}
.nav{display:none;gap:22px;margin-left:8px}
.nav a{color:var(--muted);font-weight:600;font-size:15px}
.nav a:hover{color:var(--ink)}
.hdr-cta{margin-left:auto;display:flex;gap:8px}
.hdr-cta .btn-call .lbl{display:none}
@media(min-width:820px){
  .nav{display:flex}
  .hdr-cta .btn-call .lbl{display:inline}
}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(160deg,#1a1618,#241e20 65%,#2b2224);color:#fff}
.hero-in{padding:56px 0 60px;display:grid;gap:26px}
.hero h1{font-size:clamp(28px,5vw,44px);line-height:1.12;margin:0;letter-spacing:-.5px}
.hero p{font-size:clamp(16px,2.4vw,19px);color:#d3d7de;margin:0;max-width:640px}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px}
.hero .btn-call{background:#fff;color:var(--brand)}
.hero .btn-call:hover{background:#f3e9ea}
.trust{display:flex;flex-wrap:wrap;gap:8px}
.trust span{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);
  padding:7px 12px;border-radius:999px;font-size:13.5px;font-weight:600}

/* ---------- Bölüm başlıkları ---------- */
.section{padding:46px 0}
.section h2{font-size:clamp(22px,3.5vw,30px);margin:0 0 6px;letter-spacing:-.4px}
.section .sub{color:var(--muted);margin:0 0 22px;font-size:16px}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.seeall{color:var(--brand);font-weight:700;font-size:15px;white-space:nowrap}
.seeall:hover{color:var(--brand-dark)}

/* ---------- Sayfa başlığı (iç sayfalar) ---------- */
.pagehead{background:linear-gradient(160deg,#1a1618,#241e20 70%);color:#fff;padding:34px 0 30px}
.pagehead h1{font-size:clamp(26px,4vw,38px);margin:6px 0 8px;letter-spacing:-.5px}
.pagehead p{margin:0;color:#d3d7de;max-width:640px}
.crumbs{font-size:14px;color:#a9adb5}
.crumbs a{color:#d3d7de}.crumbs a:hover{color:#fff}
.crumbs span{margin:0 6px;opacity:.7}

/* ---------- Neden biz? (özellikler) ---------- */
.features{display:grid;gap:16px;grid-template-columns:repeat(2,1fr)}
@media(min-width:860px){.features{grid-template-columns:repeat(4,1fr)}}
.feature{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 18px;box-shadow:var(--shadow)}
.feature .ic{font-size:28px;line-height:1;margin-bottom:12px}
.feature h3{font-size:16.5px;margin:0 0 6px}
.feature p{margin:0;color:var(--muted);font-size:14.5px}

/* ---------- Hakkımızda bandı ---------- */
.aboutband{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.about{display:grid;gap:24px;align-items:center}
@media(min-width:820px){.about{grid-template-columns:1.3fr 1fr}}
.about h2{margin:0 0 10px}
.about p{margin:0 0 18px;color:var(--muted);font-size:16px;max-width:600px}
.about-list{list-style:none;margin:0;padding:0;display:grid;gap:10px;font-weight:600}

/* ---------- Nasıl çalışır ---------- */
.steps{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:760px){.steps{grid-template-columns:repeat(3,1fr)}}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow)}
.step .num{width:34px;height:34px;border-radius:9px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-weight:800;margin-bottom:12px}
.step h3{margin:0 0 6px;font-size:17px}
.step p{margin:0;color:var(--muted);font-size:14.5px}

/* ---------- Filtre ---------- */
.tools{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-bottom:20px}
.filters{display:grid;gap:10px;margin-bottom:18px}
.filter-row{display:flex;gap:10px;align-items:flex-start}
.filter-row[hidden]{display:none}
.filter-lbl{flex:none;width:52px;padding-top:9px;font-size:12.5px;font-weight:700;
  color:var(--muted);text-transform:uppercase;letter-spacing:.4px}
.filter-row .chips{flex:1}
#model-row .chip{background:#eef1f7;border-color:transparent}
#model-row .chip.active{background:var(--brand);color:#fff}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:var(--surface);border:1px solid var(--line);color:var(--muted);
  padding:9px 14px;border-radius:999px;font-weight:600;font-size:14px;cursor:pointer;transition:.15s}
.chip:hover{border-color:#c9d2e3}
.chip.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.search{flex:1;min-width:200px;position:relative}
.search input{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:11px;
  font-size:15px;background:var(--surface)}
.search input:focus{outline:2px solid var(--brand);outline-offset:0;border-color:transparent}

/* ---------- Ürün grid ---------- */
.grid{display:grid;gap:16px;grid-template-columns:repeat(2,1fr)}
@media(min-width:640px){.grid{grid-template-columns:repeat(3,1fr)}}
@media(min-width:960px){.grid{grid-template-columns:repeat(4,1fr)}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow)}
.card .thumb{aspect-ratio:1/1;background:#eef1f7;display:grid;place-items:center;position:relative;overflow:hidden}
.card .thumb img{width:100%;height:100%;object-fit:cover}
.card .ph{color:#9aa6ba;font-size:13px;text-align:center;padding:10px;display:grid;gap:6px;justify-items:center}
.card .ph svg{width:34px;height:34px;opacity:.5}
.card .body{padding:12px 12px 14px;display:flex;flex-direction:column;gap:8px;flex:1}
.card .cat{font-size:12px;color:var(--brand);font-weight:700;text-transform:uppercase;letter-spacing:.4px}
.card h3{font-size:15.5px;margin:0;line-height:1.25}
.card h3 a{color:inherit}
.card h3 a:hover{color:var(--brand)}
.card a.thumb{cursor:pointer}
.card .var{display:inline-block;font-size:12px;background:#eef1f7;color:var(--muted);
  padding:3px 8px;border-radius:6px;font-weight:600;width:fit-content}
.card .price{font-weight:800;font-size:16px}
.card .price .ask{font-weight:600;color:var(--muted);font-size:13.5px}
.card .actions{margin-top:auto;display:grid;grid-template-columns:1fr auto;gap:7px}
.empty{text-align:center;color:var(--muted);padding:40px 0}
.more-wrap{display:flex;justify-content:center;margin-top:24px}
.more-wrap .btn{min-width:220px}

/* ---------- Kategori showcase (opsiyonel bölüm) ---------- */
.catgrid{display:grid;gap:14px;grid-template-columns:repeat(2,1fr)}
@media(min-width:760px){.catgrid{grid-template-columns:repeat(3,1fr)}}
@media(min-width:960px){.catgrid{grid-template-columns:repeat(6,1fr)}}
.catcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 12px;text-align:center;box-shadow:var(--shadow);cursor:pointer;transition:.15s;
  font-weight:700;display:flex;flex-direction:column;align-items:center;gap:10px}
.catcard:hover{transform:translateY(-2px);border-color:#c9d2e3;color:var(--brand)}
.catcard .ic{font-size:28px;line-height:1}

/* ---------- İçerik / prose (Hakkımızda) ---------- */
.prose{max-width:760px}
.prose p{color:var(--muted);font-size:16px;margin:0 0 16px}
.prose strong{color:var(--ink)}
.prose h3{margin:26px 0 8px;font-size:19px}

/* ---------- SSS (accordion) ---------- */
.faq{max-width:820px;display:grid;gap:10px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);overflow:hidden}
.faq summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:700;font-size:16px;
  display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;line-height:1;color:var(--brand);font-weight:700}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0;padding:0 18px 16px;color:var(--muted);font-size:15px}
.faq details p a{color:var(--brand);font-weight:700}

/* ---------- İletişim ---------- */
.contact{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:760px){.contact{grid-template-columns:repeat(3,1fr)}}
.contact-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow);display:grid;gap:6px}
.contact-card .ic{font-size:26px;line-height:1;margin-bottom:4px}
.contact-card h3{margin:0;font-size:16.5px}
.contact-card .muted{color:var(--muted);font-size:14px;margin:0}
.contact-card a{color:var(--brand);font-weight:700}
.contact-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}

/* ---------- Ürün detay sayfası ---------- */
.pcrumbs{font-size:14px;color:var(--muted);margin-bottom:18px}
.pcrumbs a{color:var(--brand);font-weight:600}
.pcrumbs a:hover{color:var(--brand-dark)}
.product{display:grid;gap:24px}
@media(min-width:820px){.product{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:34px;align-items:start}}
.product-media{position:relative;aspect-ratio:1/1;background:#eef1f7;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;display:grid;place-items:center;box-shadow:var(--shadow)}
.product-media img{width:100%;height:100%;object-fit:cover}
.product-info .cat{font-size:13px;color:var(--brand);font-weight:700;text-transform:uppercase;letter-spacing:.4px}
.product-info h1{font-size:clamp(24px,3.5vw,32px);margin:6px 0 12px;letter-spacing:-.4px}
.product-info .var{display:inline-block;font-size:13px;background:#eef1f7;color:var(--muted);
  padding:4px 10px;border-radius:7px;font-weight:600;margin-bottom:12px}
.pprice{font-weight:800;font-size:22px;margin:6px 0 4px}
.pprice .ask{font-weight:600;color:var(--muted);font-size:15px}
.pdesc{color:var(--muted);font-size:15.5px;margin:12px 0 0;max-width:52ch}
.pactions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0}
.pactions .btn{flex:1 1 auto;min-width:150px}
.pmeta{list-style:none;margin:8px 0 0;padding:18px 0 0;border-top:1px solid var(--line);
  display:grid;gap:10px}
.pmeta li{display:flex;justify-content:space-between;gap:12px;font-size:15px}
.pmeta li span{color:var(--muted)}
.pmeta li strong{font-weight:700}
.related{margin-top:48px;padding-top:30px;border-top:1px solid var(--line)}

/* ---------- Callback form ---------- */
.formband{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.formcard{background:linear-gradient(160deg,#201a1c,#2a2224);color:#fff;border-radius:18px;
  padding:26px;display:grid;gap:16px;max-width:760px;margin:0 auto}
.formcard h2{margin:0;color:#fff}
.formcard p{margin:0;color:#d3d7de}
.form{display:grid;gap:12px}
.form-row{display:grid;gap:12px}
@media(min-width:640px){.form-row{grid-template-columns:1fr 1fr}}
.form input,.form textarea{width:100%;padding:12px 13px;border:0;border-radius:10px;font-size:15px;font-family:inherit}
.form textarea{min-height:70px;resize:vertical}

/* ---------- Footer ---------- */
.foot{background:#171314;color:#c6c2c3;padding:34px 0 40px;margin-top:20px}
.foot-in{display:grid;gap:20px}
@media(min-width:760px){.foot-in{grid-template-columns:1.4fr 1fr 1fr}}
.foot h4{color:#fff;margin:0 0 10px;font-size:15px}
.foot a{color:#c6c2c3}.foot a:hover{color:#fff}
.foot .muted{color:#8a8f98;font-size:13.5px}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:7px;font-size:14.5px}

/* ---------- Mobil sabit arama çubuğu ---------- */
.mobar{position:fixed;left:0;right:0;bottom:0;z-index:60;display:grid;grid-template-columns:1fr 1fr;
  gap:8px;padding:9px 12px;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-top:1px solid var(--line)}
.mobar .btn{border-radius:12px}
@media(min-width:820px){.mobar{display:none}}
body{padding-bottom:70px}
@media(min-width:820px){body{padding-bottom:0}}