/* PlatinPDF — statik pazarlama sitesi ortak stili.
   Sistem font yığını kullanır (harici font YOK -> hızlı LCP / iyi Core Web Vitals).
   Açık + koyu tema destekli; platin/grafit marka paleti. */

:root {
  --bg: #f7f8fa;
  --bg-soft: #eef0f4;
  --surface: #ffffff;
  --surface-2: #f2f3f6;
  --border: #e2e5ea;
  --text: #1c1f28;
  --text-soft: #565b68;
  --graphite: #2a2e38;
  --graphite-2: #3a3f4b;
  --silver: #9aa0ad;
  --accent: #2a2e38;
  --accent-contrast: #ffffff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(28, 31, 40, .08);
  --shadow-lg: 0 24px 60px rgba(28, 31, 40, .14);
  --maxw: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161c;
    --bg-soft: #191c23;
    --surface: #1e212a;
    --surface-2: #23262f;
    --border: #2d313b;
    --text: #eef0f4;
    --text-soft: #a7adba;
    --graphite: #d7dbe3;
    --graphite-2: #c2c7d1;
    --silver: #7b8291;
    --accent: #e7eaf0;
    --accent-contrast: #14161c;
    --shadow: 0 10px 30px rgba(0, 0, 0, .35);
    --shadow-lg: 0 24px 60px rgba(0, 0, 0, .5);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: linear-gradient(170deg, var(--bg) 0%, var(--bg-soft) 100%);
  background-attachment: fixed;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; text-decoration: none; color: var(--text); }
.brand img { width: 30px; height: 30px; border-radius: 8px; box-shadow: 0 4px 12px rgba(40,44,58,.25); }
.nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.nav a { text-decoration: none; color: var(--text-soft); font-size: 14px; font-weight: 600; padding: 8px 12px; border-radius: 999px; }
.nav a:hover { color: var(--text); background: var(--surface-2); }
.lang-switch { display: flex; gap: 4px; margin-left: 4px; border: 1px solid var(--border); border-radius: 999px; padding: 3px; }
.lang-switch a { padding: 4px 10px; font-size: 13px; border-radius: 999px; }
.lang-switch a[aria-current="true"] { background: var(--accent); color: var(--accent-contrast); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 700; font-size: 16px; text-decoration: none; cursor: pointer;
  padding: 14px 26px; border-radius: 999px; border: 1px solid transparent;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn-primary { background: var(--accent); color: var(--accent-contrast); box-shadow: var(--shadow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-lg { padding: 17px 34px; font-size: 17px; }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 40px; text-align: center; }
.hero h1 { font-size: clamp(30px, 5vw, 50px); line-height: 1.1; margin: 0 0 16px; letter-spacing: -.02em; font-weight: 850; }
.hero .sub { font-size: clamp(16px, 2.4vw, 20px); color: var(--text-soft); max-width: 660px; margin: 0 auto 30px; }
.hero .cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; color: var(--silver);
  padding: 6px 14px; border: 1px solid var(--border); border-radius: 999px; margin-bottom: 20px; background: var(--surface);
}
.trust-row { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; margin-top: 26px; color: var(--text-soft); font-size: 14px; font-weight: 600; }
.trust-row span { display: inline-flex; align-items: center; gap: 6px; }
.trust-row .dot { color: #29a36a; font-weight: 900; }

/* Dropzone-style CTA */
.dropzone {
  max-width: 620px; margin: 34px auto 0; padding: 40px 24px;
  border: 2px dashed var(--silver); border-radius: var(--radius);
  background: var(--surface); box-shadow: var(--shadow);
  text-align: center; text-decoration: none; color: var(--text); display: block;
  transition: border-color .15s ease, transform .15s ease;
}
.dropzone:hover { border-color: var(--accent); transform: translateY(-2px); }
.dropzone .big { font-size: 19px; font-weight: 800; margin-bottom: 6px; }
.dropzone .small { color: var(--text-soft); font-size: 14px; }
.dropzone .plus { font-size: 34px; line-height: 1; margin-bottom: 12px; color: var(--silver); }

/* ---------- Sections ---------- */
section { padding: 46px 0; }
h2 { font-size: clamp(24px, 3.4vw, 34px); line-height: 1.2; margin: 0 0 14px; letter-spacing: -.015em; font-weight: 800; }
h3 { font-size: 19px; margin: 0 0 8px; font-weight: 750; }
.lead { color: var(--text-soft); font-size: 17px; max-width: 720px; }
.section-head { margin-bottom: 30px; }
.section-head.center { text-align: center; }
.section-head.center .lead { margin: 0 auto; }
p { margin: 0 0 14px; }
.prose p { color: var(--text-soft); }
.prose { max-width: 760px; }

/* Feature grid */
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow);
}
.card .ic { width: 42px; height: 42px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  background: var(--surface-2); font-size: 22px; margin-bottom: 14px; }
.card p { color: var(--text-soft); margin: 0; font-size: 15px; }

/* How-to steps */
.steps { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); counter-reset: step; }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); position: relative; }
.step .num { width: 34px; height: 34px; border-radius: 999px; background: var(--accent); color: var(--accent-contrast);
  display: flex; align-items: center; justify-content: center; font-weight: 800; margin-bottom: 12px; }
.step p { color: var(--text-soft); margin: 0; font-size: 15px; }

/* Format chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.chip { font-size: 13px; font-weight: 700; color: var(--text-soft); background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 999px; padding: 6px 12px; }

/* FAQ */
.faq { max-width: 800px; }
.faq details {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 4px 20px; margin-bottom: 12px; box-shadow: var(--shadow);
}
.faq summary { cursor: pointer; font-weight: 700; font-size: 17px; padding: 16px 0; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--silver); font-weight: 800; font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { color: var(--text-soft); margin: 0 0 16px; }

/* Related links */
.related { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.related a { text-decoration: none; }
.related .card:hover { border-color: var(--accent); transform: translateY(-2px); transition: .15s ease; }
.related h3 { color: var(--text); }
.related .card p { margin-top: 4px; }

/* CTA band */
.cta-band { text-align: center; background: var(--graphite); color: #fff; border-radius: var(--radius); padding: 48px 24px; box-shadow: var(--shadow-lg); }
.cta-band h2 { color: #fff; }
.cta-band p { color: #c8ccd6; max-width: 560px; margin: 0 auto 26px; }
.cta-band .btn-primary { background: #fff; color: var(--graphite); }

/* Breadcrumb */
.crumbs { font-size: 13px; color: var(--text-soft); padding: 18px 0 0; }
.crumbs a { text-decoration: none; color: var(--text-soft); }
.crumbs a:hover { color: var(--text); text-decoration: underline; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); margin-top: 30px; padding: 40px 0; color: var(--text-soft); font-size: 14px; }
.site-footer .cols { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; margin-bottom: 24px; }
.site-footer a { color: var(--text-soft); text-decoration: none; }
.site-footer a:hover { color: var(--text); }
.site-footer h4 { color: var(--text); font-size: 14px; margin: 0 0 10px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.site-footer .legal { border-top: 1px solid var(--border); padding-top: 20px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* Utilities */
.center { text-align: center; }
.mt-l { margin-top: 40px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

@media (max-width: 640px) {
  .site-header .wrap { height: 58px; }
  .nav .nav-links { display: none; }
  .hero { padding: 48px 0 30px; }
  section { padding: 36px 0; }
}