:root {
  --bg: #07091a;
  --surface: #0f1330;
  --stroke: rgba(255, 255, 255, 0.08);
  --text: #eef1ff;
  --muted: #9aa3c7;
  --pulse: #3cf2ff;
  --violet: #8b6cff;
  --charge: #4dff9a;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(60rem 40rem at 85% -10%, rgba(139, 108, 255, 0.22), transparent 60%),
    radial-gradient(50rem 36rem at -10% 20%, rgba(60, 242, 255, 0.14), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--pulse); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }

header.top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 0;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; letter-spacing: 0.02em; font-size: 18px; }
.brand:hover { text-decoration: none; }
.brand svg { width: 34px; height: 34px; }
nav.top a { color: var(--muted); margin-left: 18px; font-size: 14px; }

/* --- Tanıtım --- */
.hero { padding: 56px 0 24px; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border: 1px solid var(--stroke); border-radius: 999px;
  color: var(--muted); font-size: 13px; background: rgba(255, 255, 255, 0.03);
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--charge); box-shadow: 0 0 0 0 rgba(77, 255, 154, 0.6); animation: live 2s infinite; }
@keyframes live { 70% { box-shadow: 0 0 0 10px rgba(77, 255, 154, 0); } 100% { box-shadow: 0 0 0 0 rgba(77, 255, 154, 0); } }

h1 {
  font-size: clamp(38px, 7vw, 68px); line-height: 1.05; margin: 22px 0 16px; letter-spacing: -0.02em;
  background: linear-gradient(120deg, #fff 30%, var(--pulse) 70%, var(--violet));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { color: var(--muted); font-size: clamp(16px, 2.4vw, 19px); max-width: 560px; margin: 0 auto; }

.ecg { width: 100%; max-width: 760px; height: 120px; margin: 34px auto 0; display: block; }
.ecg path { fill: none; stroke: url(#ecgGrad); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 1400; stroke-dashoffset: 1400; animation: beat 3.2s ease-in-out infinite; filter: drop-shadow(0 0 6px rgba(60, 242, 255, 0.6)); }
@keyframes beat { 0% { stroke-dashoffset: 1400; } 55% { stroke-dashoffset: 0; } 100% { stroke-dashoffset: -1400; } }

.badge {
  display: inline-block; margin-top: 30px; padding: 12px 22px; border-radius: 14px;
  background: linear-gradient(135deg, rgba(60, 242, 255, 0.18), rgba(139, 108, 255, 0.18));
  border: 1px solid rgba(60, 242, 255, 0.35); color: var(--text); font-weight: 600;
}

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; padding: 48px 0; }
.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--stroke); border-radius: 20px; padding: 20px;
}
.card .ic { width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 12px; background: rgba(60, 242, 255, 0.12); color: var(--pulse); }
.card .ic svg { width: 20px; height: 20px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

.trust { text-align: center; color: var(--muted); font-size: 14px; padding-bottom: 40px; }
.trust strong { color: var(--text); }

/* --- Metin sayfaları --- */
.doc { max-width: 720px; padding-top: 24px; padding-bottom: 40px; }
.doc h1 { font-size: clamp(32px, 6vw, 44px); margin: 12px 0 6px; }
.doc .updated { color: var(--muted); font-size: 14px; margin: 0 0 28px; }
.doc h2 { font-size: 20px; margin: 34px 0 10px; color: var(--text); }
.doc p, .doc li { color: #cfd5f3; }
.doc ul { padding-left: 20px; }
.doc li { margin: 6px 0; }
.doc .summary { background: var(--surface); border: 1px solid var(--stroke); border-radius: 16px; padding: 16px 20px; }
.doc .summary ul { margin: 0; }
.doc code { background: rgba(255, 255, 255, 0.06); padding: 1px 6px; border-radius: 6px; font-size: 0.92em; }

footer.bottom { border-top: 1px solid var(--stroke); padding: 22px 0 34px; color: var(--muted); font-size: 13px; }
footer.bottom .links a { color: var(--muted); margin-right: 16px; }
footer.bottom p { margin: 10px 0 0; }

@media (prefers-reduced-motion: reduce) {
  .ecg path { animation: none; stroke-dashoffset: 0; }
  .dot { animation: none; }
}