/* Rüzgar POS — ödeme sistemleri rehberi */
:root{
  --bg:#f3f8fa;
  --bg-2:#e8f2f6;
  --card:#ffffff;
  --ink:#0d2530;
  --ink-2:#3d5966;
  --muted:#6a8591;
  --line:#d6e6ec;
  --teal:#0f8a83;
  --teal-ink:#0b6b66;
  --sky:#1b9ad6;
  --sky-soft:#e3f3fb;
  --teal-soft:#e2f5f2;
  --warn-soft:#fff6e0;
  --warn-line:#f0d58c;
  --shadow:0 1px 2px rgba(13,37,48,.05),0 6px 20px rgba(13,37,48,.06);
  --radius:16px;
  --wrap:1120px;
  --read:720px;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0a1a21;
    --bg-2:#0e222b;
    --card:#112a34;
    --ink:#e4f1f5;
    --ink-2:#b3cbd4;
    --muted:#86a3ae;
    --line:#1f3e4a;
    --teal:#38c7bc;
    --teal-ink:#5fd8ce;
    --sky:#5bbcec;
    --sky-soft:#12313e;
    --teal-soft:#0f3332;
    --warn-soft:#2e2814;
    --warn-line:#6b5a22;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"Manrope",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:17px;line-height:1.7;
}
a{color:var(--teal-ink);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--sky)}
img,svg{max-width:100%}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 16px}

/* header */
.site-head{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:19px;letter-spacing:-.01em}
.brand svg{width:34px;height:34px;flex:none}
.brand small{display:block;font-weight:600;font-size:11.5px;color:var(--muted);letter-spacing:.02em;line-height:1.1}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{text-decoration:none;color:var(--ink-2);font-weight:600;font-size:14.5px;padding:7px 12px;border-radius:999px}
.nav a:hover,.nav a[aria-current]{background:var(--teal-soft);color:var(--teal-ink)}

/* hero */
.hero{padding:44px 0 28px}
.hero-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:32px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--teal-ink);background:var(--teal-soft);padding:5px 12px;border-radius:999px;letter-spacing:.02em}
.hero h1{font-size:clamp(30px,5vw,46px);line-height:1.12;letter-spacing:-.025em;margin:16px 0 14px;font-weight:800}
.hero h1 em{font-style:normal;color:var(--teal)}
.hero p.lead{font-size:18.5px;color:var(--ink-2);margin:0 0 22px;max-width:56ch}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap}
.btn{display:inline-block;text-decoration:none;font-weight:700;font-size:15px;padding:11px 18px;border-radius:12px;border:1px solid var(--line);color:var(--ink);background:var(--card)}
.btn.primary{background:var(--teal);border-color:var(--teal);color:#fff}
.btn.primary:hover{background:var(--teal-ink);color:#fff}
@media (prefers-color-scheme: dark){.btn.primary{color:#062320}.btn.primary:hover{color:#062320}}
.hero-art{background:linear-gradient(150deg,var(--sky-soft),var(--teal-soft));border:1px solid var(--line);border-radius:24px;padding:22px}
.hero-art svg{display:block;width:100%;height:auto}

/* sections */
.section{padding:26px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.section-head h2{margin:0;font-size:26px;letter-spacing:-.015em}
.section-head p{margin:0;color:var(--muted);font-size:15px}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:8px}
.card .tag{align-self:flex-start;font-size:12px;font-weight:700;color:var(--sky);background:var(--sky-soft);padding:3px 10px;border-radius:999px}
.card h3{margin:2px 0 0;font-size:19px;line-height:1.3;letter-spacing:-.01em}
.card h3 a{color:var(--ink);text-decoration:none}
.card h3 a:hover{color:var(--teal-ink)}
.card p{margin:0;color:var(--ink-2);font-size:15.5px;line-height:1.6}
.card .meta{margin-top:auto;padding-top:8px;font-size:13px;color:var(--muted);font-weight:600}
.card.feature{grid-column:span 2;background:linear-gradient(135deg,var(--card),var(--teal-soft))}

.glossary{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.term{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--teal);border-radius:12px;padding:14px 16px}
.term b{display:block;font-size:15.5px;margin-bottom:2px}
.term span{font-size:14.5px;color:var(--ink-2);line-height:1.55;display:block}

.steps{counter-reset:s;display:grid;grid-template-columns:repeat(2,1fr);gap:12px;list-style:none;padding:0;margin:0}
.steps li{counter-increment:s;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 16px 16px 58px;position:relative;font-size:15.5px;color:var(--ink-2)}
.steps li::before{content:counter(s);position:absolute;left:16px;top:15px;width:28px;height:28px;border-radius:9px;background:var(--sky-soft);color:var(--sky);font-weight:800;display:grid;place-items:center;font-size:14px}
.steps li b{color:var(--ink)}

.note-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}

/* article */
.crumbs{font-size:14px;color:var(--muted);padding:18px 0 0}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"›";margin-right:6px;color:var(--muted)}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--teal-ink)}
.article-layout{display:grid;grid-template-columns:minmax(0,var(--read)) 280px;gap:36px;justify-content:center;padding:14px 0 40px}
.art-head{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:var(--shadow);margin-bottom:24px}
.art-head h1{font-size:clamp(27px,4.4vw,38px);line-height:1.18;letter-spacing:-.02em;margin:10px 0 12px}
.art-head .sub{color:var(--ink-2);font-size:17.5px;margin:0 0 14px}
.art-meta{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:13.5px;color:var(--muted);font-weight:600}
.prose h2{font-size:25px;line-height:1.3;letter-spacing:-.015em;margin:38px 0 10px;scroll-margin-top:84px}
.prose h3{font-size:19.5px;margin:26px 0 6px}
.prose p{margin:0 0 16px}
.prose ul,.prose ol{padding-left:22px;margin:0 0 18px}
.prose li{margin-bottom:6px}
.prose strong{color:var(--ink)}
.prose .callout{background:var(--sky-soft);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:20px 0}
.prose .callout.warn{background:var(--warn-soft);border-color:var(--warn-line)}
.prose .callout p:last-child{margin-bottom:0}
.prose .callout b.t{display:block;margin-bottom:4px;color:var(--ink)}
.table-wrap{overflow-x:auto;margin:6px 0 22px;border:1px solid var(--line);border-radius:14px;background:var(--card)}
.prose table{border-collapse:collapse;width:100%;font-size:15px;min-width:520px}
.prose th,.prose td{padding:11px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.prose th{background:var(--teal-soft);font-weight:700;color:var(--ink);font-size:14px}
.prose tr:last-child td{border-bottom:0}
.prose .faq h3{font-size:17.5px;margin:20px 0 4px}
.prose code{font-size:.92em;background:var(--bg-2);padding:1px 6px;border-radius:6px}
.formula{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14.5px;background:var(--bg-2);border-radius:12px;padding:14px 16px;margin:0 0 18px;overflow-x:auto;white-space:pre}

.side{position:relative}
.side-box{position:sticky;top:84px;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.side-box h2{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 10px}
.toc{list-style:none;margin:0;padding:0;font-size:14.5px}
.toc li{margin:0}
.toc a{display:block;padding:6px 10px;border-radius:8px;text-decoration:none;color:var(--ink-2);line-height:1.4}
.toc a:hover{background:var(--teal-soft);color:var(--teal-ink)}

.related{margin-top:36px}
.related h2{font-size:21px;margin:0 0 12px}
.related .cards{grid-template-columns:repeat(2,1fr)}

.page-simple{max-width:var(--read);margin:0 auto;padding:10px 0 50px}

/* footer */
.site-foot{border-top:1px solid var(--line);background:var(--card);padding:22px 0;font-size:14px;color:var(--muted);margin-top:30px}
.site-foot .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.site-foot a{color:var(--muted)}

@media (max-width:960px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .side{order:-1}
  .side-box{position:static}
  .cards{grid-template-columns:repeat(2,1fr)}
  .glossary{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  body{font-size:16.5px}
  .hero{padding:28px 0 14px}
  .hero-grid{grid-template-columns:1fr}
  .cards,.related .cards,.steps{grid-template-columns:1fr}
  .card.feature{grid-column:auto}
  .glossary{grid-template-columns:1fr}
  .art-head{padding:20px}
  .nav a{padding:6px 9px;font-size:14px}
}

/* hesaplayıcı */
.calc{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px;margin:24px 0;box-shadow:var(--shadow)}
.calc h3{margin:0 0 4px}
.calc-hint{font-size:14px;color:var(--muted);margin:0 0 14px!important}
.calc-grid,.calc-cols{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}
.calc fieldset{border:1px solid var(--line);border-radius:12px;padding:10px 12px 12px;margin:0;display:grid;gap:8px}
.calc legend{font-weight:800;font-size:14px;color:var(--teal-ink);padding:0 6px}
.calc label{display:grid;gap:4px;font-size:13.5px;font-weight:600;color:var(--ink-2)}
.calc input{font:inherit;font-size:16px;padding:9px 11px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--ink);width:100%}
.calc input:focus{outline:2px solid var(--sky);outline-offset:1px}
.calc-out{display:grid;gap:4px;background:var(--teal-soft);border-radius:12px;padding:12px 14px;font-size:15px}
.calc-win{font-weight:700;color:var(--teal-ink)}
@media (max-width:640px){.calc-grid,.calc-cols{grid-template-columns:1fr}}