/* Ren pazarlama sitesi (rentekno.com)
   Mimari: koyu hero + sağda gerçek ürün kartı, yuvarlak nav, açık gövde, koyu footer.
   Marka: Ren mavisi #0F52FF + lacivert; yazı tipleri yerel (fonts.css): Manrope + Inter.
   Sabit tasarım (referans mimarisiyle uyumlu): koyu hero/CTA/footer + açık gövde. */

:root {
  --hero: #0B1222;
  --hero-2: #0E1830;
  --body: #F5F7FA;
  --surface: #FFFFFF;
  --ink: #0E1B3D;
  --ink-2: #51607F;
  --ink-3: #8592AC;
  --line: #E6EBF2;
  --line-2: #EFF2F7;
  --accent: #0F52FF;
  --accent-ink: #FFFFFF;
  --accent-2: #2E6BFF;
  --navy: #0B1222;
  --ok: #157347; --ok-bg: #E4F3EA;
  --warn: #9A5B00; --warn-bg: #FBEFD8;
  --info: #0F52FF; --info-bg: #E7EEFF;
  --mut: #64748B; --mut-bg: #EEF1F6;
  --sh: 0 1px 2px rgba(10,18,34,.05), 0 14px 40px rgba(10,18,34,.09);
  --sh-card: 0 30px 70px rgba(5,12,30,.35);
  --r: 16px; --r-s: 12px;
  --maxw: 1160px;
  --sp: clamp(68px, 9vw, 112px);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--body); color: var(--ink); font: 400 17px/1.6 Inter, system-ui, -apple-system, "Segoe UI", sans-serif; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
h1,h2,h3,h4 { font-family: Manrope, Inter, system-ui, sans-serif; font-weight: 800; letter-spacing: -.035em; line-height: 1.04; margin: 0; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
ul { margin: 0; padding: 0; list-style: none; }
strong { font-weight: 600; }
.kapsa { width: min(var(--maxw), calc(100% - 44px)); margin-inline: auto; }
.atla { position: absolute; inset-inline-start: 12px; top: -48px; background: #fff; color: var(--navy); padding: 10px 14px; border-radius: 8px; z-index: 80; }
.atla:focus { top: 12px; }
:focus-visible { outline: 2.5px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* düğme */
.dugme { display: inline-flex; align-items: center; gap: 9px; height: 50px; padding: 0 22px; border-radius: var(--r-s); background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: 15.5px; border: 1px solid transparent; cursor: pointer; transition: transform .12s ease, background .15s ease, border-color .15s ease; white-space: nowrap; }
.dugme:hover { background: var(--accent-2); }
.dugme:active { transform: translateY(1px); }
.dugme.hayalet { background: transparent; color: #fff; border-color: rgba(255,255,255,.26); }
.dugme.hayalet:hover { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.5); }
.dugme.koyu { background: var(--navy); color: #fff; }
.dugme.koyu:hover { background: #16233f; }
.dugme svg { width: 17px; height: 17px; }

/* yuvarlak nav */
.ust { position: sticky; top: 14px; z-index: 50; margin-top: 14px; }
.ust-ic { width: min(var(--maxw), calc(100% - 28px)); margin-inline: auto; display: flex; align-items: center; gap: 22px; height: 60px; padding: 0 10px 0 20px; background: rgba(255,255,255,.92); backdrop-filter: blur(12px); border: 1px solid var(--line); border-radius: 999px; box-shadow: var(--sh); }
.marka img { height: 28px; width: auto; }
.nav { display: flex; gap: 2px; margin-inline-start: 14px; }
.nav a { color: var(--ink-2); font-size: 14.5px; font-weight: 500; padding: 9px 13px; border-radius: 999px; }
.nav a:hover { color: var(--ink); background: var(--line-2); }
.ust-sag { margin-inline-start: auto; display: flex; align-items: center; gap: 8px; }
.ust-sag .giris { color: var(--ink-2); font-size: 14.5px; font-weight: 600; padding: 9px 14px; }
.ust-sag .giris:hover { color: var(--ink); }
.ust .dugme { height: 42px; padding: 0 18px; font-size: 14.5px; }

/* hero (koyu) */
.hero { background: var(--hero); color: #fff; margin-top: -74px; padding-top: 148px; padding-bottom: clamp(64px, 8vw, 104px); position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(58% 55% at 82% -6%, rgba(46,107,255,.30), transparent 60%), radial-gradient(46% 42% at 6% 112%, rgba(15,82,255,.14), transparent 60%); pointer-events: none; }
.hero .kapsa { position: relative; display: grid; grid-template-columns: 1.02fr .98fr; gap: clamp(36px, 5vw, 72px); align-items: center; }
.hero h1 { font-size: clamp(44px, 7.2vw, 84px); line-height: 1.015; letter-spacing: -.05em; color: #fff; }
.hero .lead { margin-top: 26px; font-size: clamp(17px, 1.95vw, 20px); line-height: 1.55; color: rgba(255,255,255,.72); max-width: 44ch; }
.hero .eylem { display: flex; align-items: center; gap: 12px; margin-top: 36px; flex-wrap: wrap; }

/* ürün kartı */
.kart { background: var(--surface); color: var(--ink); border-radius: 20px; box-shadow: var(--sh-card); overflow: hidden; }
.kart .k-ust { display: flex; align-items: flex-start; justify-content: space-between; padding: 20px 22px 16px; border-bottom: 1px solid var(--line-2); }
.kart .k-ust h3 { font-size: 18px; letter-spacing: -.02em; }
.kart .k-ust .surucu { margin-top: 4px; font-size: 13px; color: var(--ink-3); font-family: Inter; font-weight: 400; letter-spacing: 0; }
.kart .k-ust .sayac { text-align: right; flex: none; }
.kart .k-ust .sayac b { font-family: Manrope; font-weight: 800; font-size: 24px; letter-spacing: -.02em; }
.kart .k-ust .sayac span { display: block; font-size: 11.5px; color: var(--ink-3); }
.satir { display: grid; grid-template-columns: 26px 1fr auto; gap: 14px; align-items: center; padding: 14px 22px; position: relative; }
.satir + .satir { border-top: 1px solid var(--line-2); }
.satir .no { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-family: Manrope; font-weight: 700; font-size: 12.5px; color: #fff; background: var(--mut); }
.satir.v .no { background: var(--accent); }
.satir .yer b { display: block; font-size: 14.5px; font-weight: 600; }
.satir .yer span { font-size: 12.5px; color: var(--ink-3); }
.rozet { font-size: 11.5px; font-weight: 700; padding: 5px 10px; border-radius: 999px; white-space: nowrap; }
.rozet.ok { color: var(--ok); background: var(--ok-bg); }
.rozet.warn { color: var(--warn); background: var(--warn-bg); }
.rozet.info { color: var(--info); background: var(--info-bg); }
.rozet.mut { color: var(--mut); background: var(--mut-bg); }
.kart .k-alt { display: flex; align-items: center; justify-content: space-between; padding: 14px 22px; border-top: 1px solid var(--line-2); font-size: 12.5px; color: var(--ink-3); }
.k-ust .canli { display: inline-flex; align-items: center; gap: 7px; margin-top: 9px; font-size: 12px; font-weight: 700; color: var(--ok); }
.nabiz { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); position: relative; flex: none; }
.nabiz::after { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 2px solid var(--ok); opacity: 0; }
.satir .ek { display: block; margin-top: 3px; font-size: 11.5px; font-weight: 600; color: var(--accent); }
.satir.simdi { background: linear-gradient(90deg, var(--info-bg) 0%, transparent 70%); }
.k-alt .ornek { padding: 3px 9px; border-radius: 999px; background: var(--line-2); color: var(--ink-3); font-weight: 600; font-size: 11px; }
@media (prefers-reduced-motion: no-preference) {
  .nabiz::after { animation: nb 1.9s ease-out infinite; }
  @keyframes nb { 0% { transform: scale(.55); opacity: .6; } 100% { transform: scale(1.6); opacity: 0; } }
  .hero .kart { animation: kgir .7s cubic-bezier(.16, 1, .3, 1) both; }
  @keyframes kgir { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
}

/* bölüm iskeleti */
section { padding: var(--sp) 0; }
.b-ust { max-width: 42ch; margin-bottom: 52px; }
.b-ust h2 { font-size: clamp(30px, 4.4vw, 50px); }
.b-ust p { margin-top: 16px; font-size: 18px; color: var(--ink-2); line-height: 1.55; }

/* nasıl çalışır: numaralı akış */
.akis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.adim { background: var(--surface); padding: 28px 26px; }
.adim .no { font-family: Manrope; font-weight: 800; font-size: 15px; color: var(--accent); margin-bottom: 14px; }
.adim h3 { font-size: 18.5px; letter-spacing: -.02em; }
.adim p { margin-top: 9px; color: var(--ink-2); font-size: 15px; line-height: 1.5; }

/* modüller */
.moduller { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.modul-izgara { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px 44px; }
.modul .im { width: 44px; height: 44px; border-radius: 12px; background: var(--info-bg); color: var(--accent); display: grid; place-items: center; margin-bottom: 18px; }
.modul .im svg { width: 24px; height: 24px; }
.modul h3 { font-size: 19px; letter-spacing: -.02em; }
.modul p { margin-top: 9px; color: var(--ink-2); font-size: 15.5px; line-height: 1.55; }

/* SSS */
.sss { max-width: 820px; }
.sss details { border-bottom: 1px solid var(--line); }
.sss summary { cursor: pointer; list-style: none; display: flex; align-items: center; gap: 16px; padding: 22px 0; font-family: Manrope; font-weight: 700; font-size: 18px; letter-spacing: -.015em; }
.sss summary::-webkit-details-marker { display: none; }
.sss summary .art { margin-inline-start: auto; flex: none; width: 22px; height: 22px; color: var(--ink-3); transition: transform .2s ease; }
.sss details[open] summary .art { transform: rotate(45deg); color: var(--accent); }
.sss details p { color: var(--ink-2); font-size: 15.5px; line-height: 1.6; padding: 0 0 24px; max-width: 70ch; }
@media (prefers-reduced-motion: reduce) { .sss summary .art { transition: none; } }

/* kapanış (koyu) */
.kapanis { background: var(--hero); color: #fff; }
.kapanis::before { content: ""; }
.kapanis .kapsa { text-align: center; }
.kapanis h2 { color: #fff; font-size: clamp(32px, 5vw, 56px); max-width: 16ch; margin-inline: auto; }
.kapanis p { margin: 18px auto 0; color: rgba(255,255,255,.72); font-size: 18px; max-width: 46ch; line-height: 1.55; }
.kapanis .eylem { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 34px; flex-wrap: wrap; }

/* footer (koyu) */
.alt { background: var(--hero-2); color: rgba(255,255,255,.7); padding: 64px 0 40px; }
.alt .kapsa { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 36px; }
.alt .marka img { height: 28px; }
.alt .ozet { margin-top: 16px; font-size: 14.5px; max-width: 32ch; line-height: 1.55; color: rgba(255,255,255,.6); }
.alt h4 { font-family: Inter; font-size: 12.5px; font-weight: 700; color: rgba(255,255,255,.5); letter-spacing: .04em; text-transform: uppercase; margin-bottom: 15px; }
.alt li { margin-bottom: 11px; }
.alt li a { color: rgba(255,255,255,.72); font-size: 15px; }
.alt li a:hover { color: #fff; }
.alt .telif { grid-column: 1 / -1; margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.12); font-size: 14px; color: rgba(255,255,255,.5); display: flex; gap: 10px 24px; justify-content: space-between; flex-wrap: wrap; }

/* hafif giriş animasyonu */
@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: view()) {
    .anim { opacity: 0; transform: translateY(16px); animation: belir linear both; animation-timeline: view(); animation-range: entry 0% cover 20%; }
    @keyframes belir { to { opacity: 1; transform: none; } }
  }
}

/* duyarlı */
@media (max-width: 900px) {
  .hero .kapsa { grid-template-columns: 1fr; gap: 44px; }
  .akis { grid-template-columns: 1fr 1fr; }
  .modul-izgara { grid-template-columns: 1fr 1fr; gap: 34px; }
}
@media (max-width: 620px) {
  .nav { display: none; }
  .ust-sag .giris { display: none; }
  .akis, .modul-izgara { grid-template-columns: 1fr; }
  .alt .kapsa { grid-template-columns: 1fr 1fr; }
  .alt > .kapsa > div:first-child { grid-column: 1 / -1; }
}