:root {
  --bg: #ffffff; --fg: #1d2420; --muted: #5d6a63; --line: #e3e9e5; --brand: #00704A; --brand-ink: #ffffff;
  --card: #f5f8f6; --crit: #c2412d; --warn: #b7791f; --ok: #2f855a; --phone: #0f1512; --phone-fg: #e6ece8; --phone-card: #1b2520;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1512; --fg: #e6ece8; --muted: #9aa8a0; --line: #25312b; --brand: #3fbf8a; --brand-ink: #0f1512;
    --card: #161f1a; --crit: #f07a66; --warn: #e3b25a; --ok: #63c592; --phone: #000000; --phone-card: #161f1a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
a { color: var(--brand); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }

/* Üst şerit */
.top { border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 12px; min-height: 60px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; font-weight: 700; font-size: 1.1rem; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.top nav { display: flex; gap: 16px; margin-left: auto; flex-wrap: wrap; align-items: center; }
.top nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
.top nav a[aria-current="page"], .top nav a:hover { color: var(--fg); }
.lang-switch { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.lang-switch button { border: 0; background: transparent; color: var(--muted); font: inherit; font-size: .85rem; padding: 2px 10px; cursor: pointer; }
.lang-switch button[aria-pressed="true"] { background: var(--brand); color: var(--brand-ink); }

/* İki dil: seçili olmayan gizli */
html[data-lang="en"] [lang="tr"]:not(html), html[data-lang="tr"] [lang="en"]:not(html) { display: none !important; }

/* Bölümler */
.hero { padding: 56px 0 40px; }
.hero h1 { font-size: clamp(1.9rem, 4.5vw, 2.8rem); line-height: 1.15; margin: 0 0 14px; letter-spacing: -.01em; }
.hero p.lead { font-size: 1.15rem; color: var(--muted); max-width: 640px; margin: 0 0 22px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 10px; text-decoration: none; font-weight: 600; border: 1px solid var(--brand); }
.btn.primary { background: var(--brand); color: var(--brand-ink); }
.btn.ghost { color: var(--brand); }
section.block { padding: 36px 0; border-top: 1px solid var(--line); }
section.block h2 { font-size: 1.5rem; margin: 0 0 8px; }
section.block > .wrap > p.sub { color: var(--muted); margin: 0 0 22px; max-width: 680px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }

/* Mimari akış */
.flow { display: flex; flex-wrap: wrap; gap: 10px; align-items: stretch; }
.flow .step { flex: 1 1 160px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.flow .step b { display: block; }
.flow .step span { color: var(--muted); font-size: .9rem; }
.flow .arrow { align-self: center; color: var(--muted); font-size: 1.3rem; }
@media (max-width: 640px) { .flow .arrow { display: none; } }

/* Mobil bölüm: telefon maketi */
.split { display: grid; grid-template-columns: 1fr 300px; gap: 32px; align-items: center; }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } .phone { margin: 0 auto; } }
.phone { width: 280px; border-radius: 40px; background: var(--phone); padding: 14px; box-shadow: 0 10px 30px rgba(0,0,0,.18); color: var(--phone-fg); font-size: 13px; line-height: 1.35; }
.phone .screen { border-radius: 28px; background: #0b100d; padding: 16px 12px 14px; min-height: 480px; }
.phone .notch { width: 90px; height: 22px; border-radius: 12px; background: #000; margin: -6px auto 12px; }
.phone .title { font-weight: 700; font-size: 20px; margin: 0 4px 10px; }
.phone .row { background: var(--phone-card); border-radius: 12px; padding: 9px 11px; margin-bottom: 8px; display: flex; gap: 9px; align-items: flex-start; }
.phone .dot { width: 9px; height: 9px; border-radius: 50%; margin-top: 4px; flex: none; }
.phone .dot.c { background: #f07a66; } .phone .dot.w { background: #e3b25a; } .phone .dot.o { background: #63c592; }
.phone .row small { display: block; color: #9aa8a0; }
.phone .tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.phone .tile { background: var(--phone-card); border-radius: 12px; padding: 8px 10px; }
.phone .tile b { font-size: 18px; display: block; }
.phone .tile small { color: #9aa8a0; }
.phone .demo { font-size: 11px; text-align: center; color: #9aa8a0; margin-top: 8px; }
ul.ticks { padding-left: 0; list-style: none; margin: 0; }
ul.ticks li { padding-left: 26px; position: relative; margin: 8px 0; }
ul.ticks li::before { content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 700; }

/* Metin sayfaları (gizlilik, destek) */
.doc { padding: 32px 0 56px; }
.doc h1 { font-size: 1.7rem; margin: 0 0 4px; }
.doc h2 { font-size: 1.15rem; margin: 28px 0 6px; color: var(--brand); }
.doc p, .doc li { margin: 6px 0; }
.muted { color: var(--muted); font-size: .9rem; }

footer { border-top: 1px solid var(--line); padding: 22px 0 36px; color: var(--muted); font-size: .9rem; }
footer .wrap { display: flex; gap: 16px; flex-wrap: wrap; }
footer a { color: var(--muted); }