/* DOYS — ürün tanıtım sitesi. Ürün kimliği okuldan bağımsızdır:
   mobil uygulamanın markası sunucudan gelir (white-label), site ise
   DOYS'un kendi kimliğini taşır. */
:root {
  --ink: #101418;
  --ink-soft: #2b3138;
  --muted: #667180;
  --line: #e4e8ed;
  --bg: #ffffff;
  --bg-alt: #f6f8fa;
  --brand: #0d9488;
  --brand-deep: #0b7a70;
  --brand-soft: #e6f5f3;
  --radius: 14px;
  --wrap: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--brand-deep); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* Header */
header.site {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; letter-spacing: -.01em; color: var(--ink); text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav nav { margin-left: auto; display: flex; gap: 26px; }
.nav nav a { color: var(--ink-soft); text-decoration: none; font-size: 15px; }
.nav nav a:hover { color: var(--brand-deep); }
@media (max-width: 860px) { .nav nav { display: none; } .nav .btn { margin-left: auto; } }

.btn {
  display: inline-block; padding: 11px 20px; border-radius: 999px;
  background: var(--brand); color: #fff; text-decoration: none;
  font-weight: 600; font-size: 15px; border: 1px solid var(--brand);
}
.btn:hover { background: var(--brand-deep); border-color: var(--brand-deep); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--muted); background: var(--bg-alt); }

/* Sections */
section { padding: 84px 0; border-top: 1px solid var(--line); }
section:first-of-type { border-top: 0; }
section.alt { background: var(--bg-alt); }
h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.12; letter-spacing: -.025em; margin: 0 0 18px; }
h2 { font-size: clamp(26px, 3.4vw, 34px); line-height: 1.2; letter-spacing: -.02em; margin: 0 0 14px; }
h3 { font-size: 18px; margin: 0 0 6px; letter-spacing: -.01em; }
.lead { font-size: 19px; color: var(--muted); max-width: 62ch; margin: 0 0 28px; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: 12px; font-weight: 700; color: var(--brand-deep); margin: 0 0 12px; }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }

/* Hero */
.hero { padding: 92px 0 76px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-shot { display: flex; gap: 16px; justify-content: center; }
.hero-shot img { width: 47%; border-radius: 22px; border: 1px solid var(--line); box-shadow: 0 24px 60px rgba(16,20,24,.14); }
.hero-shot img:nth-child(2) { margin-top: 34px; }

/* Grid cards */
.grid { display: grid; gap: 20px; }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .g3, .g2 { grid-template-columns: 1fr; } }
.card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
section.alt .card { background: #fff; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.ico { width: 38px; height: 38px; border-radius: 10px; background: var(--brand-soft); color: var(--brand-deep);
  display: flex; align-items: center; justify-content: center; font-size: 19px; margin-bottom: 14px; }

/* Steps */
.steps { counter-reset: s; display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding-top: 52px; }
.step::before {
  counter-increment: s; content: counter(s);
  position: absolute; top: 0; left: 0; width: 38px; height: 38px; border-radius: 999px;
  background: var(--ink); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700;
}
.step p { color: var(--muted); margin: 0; }

/* Pricing */
.plan { border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; background: #fff; display: flex; flex-direction: column; }
.plan.featured { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.price { font-size: 30px; font-weight: 700; letter-spacing: -.02em; margin: 10px 0 4px; }
.price small { font-size: 14px; font-weight: 500; color: var(--muted); }
.plan ul { list-style: none; padding: 0; margin: 18px 0 24px; }
.plan li { padding-left: 26px; position: relative; font-size: 15px; color: var(--ink-soft); margin-bottom: 9px; }
.plan li::before { content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 700; }
.plan .btn { margin-top: auto; text-align: center; }
.note { font-size: 15px; color: var(--muted); }

/* FAQ */
details { border-bottom: 1px solid var(--line); padding: 18px 0; }
details summary { cursor: pointer; font-weight: 600; font-size: 17px; list-style: none; }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; float: right; color: var(--brand-deep); font-weight: 700; }
details[open] summary::after { content: "–"; }
details p { color: var(--muted); margin: 12px 0 0; max-width: 78ch; }

/* Contact */
.contact-box { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
@media (max-width: 900px) { .contact-box { grid-template-columns: 1fr; } }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.field input, .field textarea {
  width: 100%; padding: 11px 13px; border: 1px solid var(--line); border-radius: 10px;
  font: inherit; font-size: 15px; background: #fff; color: var(--ink);
}
.field textarea { min-height: 120px; resize: vertical; }
.kv { margin: 0 0 14px; }
.kv dt { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); font-weight: 700; }
.kv dd { margin: 2px 0 0; font-size: 17px; }

/* Legal pages */
.doc { max-width: 780px; margin: 0 auto; padding: 64px 24px 96px; }
.doc h1 { font-size: 36px; }
.doc h2 { font-size: 21px; margin-top: 38px; }
.doc p, .doc li { color: var(--ink-soft); font-size: 16px; }
.doc .updated { color: var(--muted); font-size: 15px; }

/* Footer */
footer.site { border-top: 1px solid var(--line); padding: 46px 0; background: var(--bg-alt); }
.foot { display: flex; flex-wrap: wrap; gap: 22px; align-items: center; }
.foot a { color: var(--ink-soft); text-decoration: none; font-size: 15px; }
.foot a:hover { color: var(--brand-deep); }
.foot .sep { margin-left: auto; color: var(--muted); font-size: 14px; }
.en-block { background: var(--bg-alt); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.en-block h3 { margin-bottom: 8px; }
.en-block p { color: var(--muted); font-size: 15px; margin: 0 0 10px; }