:root {
    --bg: #f5f8fc;
    --surface: #ffffff;
    --text: #0f1b2d;
    --text-muted: #5b6b80;
    --border: rgba(15, 27, 45, 0.08);
    --primary: #0a7ad6;
    --primary-soft: rgba(10, 122, 214, 0.1);
    --brand-top: #08468f;
    --brand-bottom: #1c96e6;
    --accent: #4fe0da;
    --radius: 20px;
    --max: 1120px;
    color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b1320;
        --surface: #121c2c;
        --text: #eef3fa;
        --text-muted: #9aabc2;
        --border: rgba(255, 255, 255, 0.08);
        --primary: #4da3ff;
        --primary-soft: rgba(77, 163, 255, 0.14);
    }
}

* { box-sizing: border-box; }

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

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.6;
}

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

img { max-width: 100%; display: block; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Üst menü */
.nav {
    position: sticky;
    top: 0;
    z-index: 10;
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid var(--border);
}
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 18px; }
.brand:hover { text-decoration: none; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: 15px; }
.nav-links a { color: var(--text-muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.lang { border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; }

/* Hero */
.hero {
    position: relative;
    overflow: hidden;
    color: #fff;
    background:
        radial-gradient(circle at 85% 10%, rgba(79, 224, 218, 0.35), transparent 45%),
        linear-gradient(160deg, var(--brand-top), var(--brand-bottom));
}
.hero .container { display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 40px; padding-top: 72px; padding-bottom: 0; }
.hero h1 { font-size: clamp(36px, 5.4vw, 60px); line-height: 1.08; letter-spacing: -0.02em; margin: 0 0 18px; }
.hero p.lead { font-size: clamp(18px, 2vw, 21px); color: rgba(255, 255, 255, 0.88); margin: 0 0 30px; max-width: 34em; }
.hero-copy { padding-bottom: 72px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 999px;
    padding: 13px 22px;
    font-weight: 600;
    font-size: 16px;
}
.btn:hover { text-decoration: none; }
.btn-light { background: #fff; color: var(--brand-top); }
.btn-ghost { border: 1px solid rgba(255, 255, 255, 0.45); color: #fff; }
.btn-soon { background: rgba(255, 255, 255, 0.16); color: #fff; cursor: default; }
.hero-phones { display: flex; justify-content: center; align-items: flex-end; gap: 18px; align-self: end; }
.hero-phones .phone:nth-child(2) { transform: translateY(40px); }

/* Telefon çerçevesi */
.phone {
    width: 100%;
    max-width: 250px;
    border-radius: 40px;
    padding: 9px;
    background: #121620;
    box-shadow: 0 30px 60px rgba(0, 20, 60, 0.35), inset 0 0 0 2px #3a4352;
}
.phone img { border-radius: 32px; width: 100%; height: auto; }

/* Bölümler */
section.block { padding: 88px 0; }
.section-title { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-title h2 { font-size: clamp(28px, 3.6vw, 40px); line-height: 1.15; letter-spacing: -0.01em; margin: 0 0 12px; }
.section-title p { color: var(--text-muted); margin: 0; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.feature .icon {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: var(--primary-soft);
    color: var(--primary);
    margin-bottom: 16px;
}
.feature h3 { font-size: 19px; margin: 0 0 8px; }
.feature p { color: var(--text-muted); margin: 0; font-size: 16px; }

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    text-align: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 20px;
}
.stats strong { display: block; font-size: 38px; line-height: 1.1; color: var(--primary); }
.stats span { color: var(--text-muted); font-size: 15px; }

.gallery { display: flex; gap: 22px; overflow-x: auto; padding: 8px 20px 24px; scroll-snap-type: x mandatory; }
.gallery figure { flex: 0 0 220px; margin: 0; scroll-snap-align: center; }
.gallery figcaption { text-align: center; color: var(--text-muted); font-size: 14px; margin-top: 14px; }

.cta-final {
    text-align: center;
    color: #fff;
    border-radius: 28px;
    padding: 64px 24px;
    background:
        radial-gradient(circle at 15% 0%, rgba(79, 224, 218, 0.3), transparent 50%),
        linear-gradient(160deg, var(--brand-top), var(--brand-bottom));
}
.cta-final h2 { font-size: clamp(28px, 3.6vw, 40px); margin: 0 0 12px; }
.cta-final p { color: rgba(255, 255, 255, 0.88); margin: 0 0 28px; }
.cta-final .cta-row { justify-content: center; }

/* Metin sayfaları (gizlilik, destek) */
.page-head { background: var(--surface); border-bottom: 1px solid var(--border); padding: 56px 0 36px; }
.page-head h1 { font-size: clamp(30px, 4vw, 42px); margin: 0 0 8px; letter-spacing: -0.01em; }
.page-head p { color: var(--text-muted); margin: 0; }
.prose { max-width: 760px; margin: 0 auto; padding: 48px 20px 80px; }
.prose h2 { font-size: 22px; margin: 40px 0 12px; }
.prose h3 { font-size: 18px; margin: 28px 0 8px; }
.prose p, .prose li { color: var(--text); }
.prose ul { padding-left: 22px; }
.prose li { margin: 6px 0; }
.prose .muted { color: var(--text-muted); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 24px; margin: 18px 0; }

details { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 0 20px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 600; padding: 16px 0; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--text-muted); font-weight: 400; }
details[open] summary::after { content: "–"; }
details p { margin: 0 0 16px; color: var(--text-muted); }

/* Alt bilgi */
footer { border-top: 1px solid var(--border); padding: 32px 0 40px; color: var(--text-muted); font-size: 14px; }
footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
footer a { color: var(--text-muted); }

@media (max-width: 900px) {
    .hero .container { grid-template-columns: 1fr; text-align: center; padding-top: 48px; }
    .hero p.lead { margin-left: auto; margin-right: auto; }
    .hero-copy { padding-bottom: 8px; }
    .cta-row { justify-content: center; }
    .hero-phones .phone { max-width: 190px; }
    .features { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
    body { font-size: 16px; }
    .nav-links a.hide-sm { display: none; }
    .features { grid-template-columns: 1fr; }
    .stats { grid-template-columns: 1fr; }
    .hero-phones .phone:nth-child(2) { display: none; }
    section.block { padding: 64px 0; }
}