/*
  Ne: Tanitim sitesinin (www.sbysis.com ana sayfa) tek stil dosyasi.
  Ne yapar: Sade beyaz zemin, TEK RENK siyah vurgu (kullanici karari 24.09.2026: iki renkli / renk gecisli basliklar "hazir sablon" gibi
  duruyor), sistem fontu; ust menu, giris bolumu, ozellik kartlari, adimlar,
  guvenlik, mobil, SSS, iletisim ve alt bilgi bolumleri. Mobil uyumlu (tek sutuna iner). Harici font/kutuphane YOK, JavaScript YOK (SSS <details>).
  Neden var: Tanitim sayfasi panelden ayri bir yuzey; admin.css (tablo/kenar menu agirlikli) ile sisirilmesin diye ayri ve kucuk tutulur.
  Etkilesim: Pages/_SiteLayout.cshtml, Pages/Index.cshtml, wwwroot/img/site/*.svg.
*/
:root {
  --s-text: #0f172a;
  --s-body: #334155;
  --s-muted: #64748b;
  --s-line: #e5e9f2;
  --s-soft: #f8fafc;
  --s-primary: #111827;
  --s-primary-dark: #000000;
  --s-primary-soft: #f3f4f6;
  --s-success: #16a34a;
  --s-radius: 14px;
  --s-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--s-font); color: var(--s-body); background: #fff; font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--s-text); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: #cbd5e1; }
a:hover { text-decoration-color: var(--s-text); }
h1, h2, h3 { color: var(--s-text); line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.01em; }
h1 { font-size: clamp(32px, 4.4vw, 50px); font-weight: 800; }
h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 750; }
h3 { font-size: 18px; font-weight: 650; }
p { margin: 0 0 14px; }

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section-soft { background: var(--s-soft); border-top: 1px solid var(--s-line); border-bottom: 1px solid var(--s-line); }
.section-head { max-width: 720px; margin: 0 0 44px; }
.section-head.center { margin: 0 auto 44px; text-align: center; }
.eyebrow { display: inline-block; font-size: 12.5px; font-weight: 650; color: var(--s-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 12px; }
.since { font-size: 17px; color: var(--s-text); font-weight: 550; margin: 4px 0 14px; padding-left: 14px; border-left: 3px solid var(--s-text); }
.lead { font-size: 18px; color: var(--s-muted); }

/* Butonlar */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 22px; border-radius: 10px; font-weight: 650; font-size: 15px; border: 1px solid transparent; transition: background .15s, border-color .15s, color .15s; }
.btn, .btn:hover { text-decoration: none; }
.btn-primary { background: var(--s-primary); color: #fff; }
.btn-primary:hover { background: var(--s-primary-dark); }
.btn-ghost { background: #fff; color: var(--s-text); border-color: var(--s-line); }
.btn-ghost:hover { border-color: #cbd5e1; background: var(--s-soft); }
.btn-small { padding: 8px 16px; font-size: 14px; }

/* Ust menu */
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255, 255, 255, 0.94); backdrop-filter: saturate(160%) blur(8px); border-bottom: 1px solid var(--s-line); }
.site-header .container { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--s-text); }
.brand, .brand:hover { text-decoration: none; }
.brand-mark { width: 32px; height: 32px; border-radius: 9px; background: var(--s-text); color: #fff; display: grid; place-items: center; font-size: 17px; }
.site-nav { display: flex; gap: 24px; margin-left: 12px; }
.site-nav a { color: var(--s-body); font-size: 15px; font-weight: 550; text-decoration: none; }
.site-nav a:hover { color: var(--s-text); text-decoration: underline; }
.header-actions { margin-left: auto; display: flex; gap: 10px; }
.menu-toggle { display: none; margin-left: auto; }
.menu-toggle summary { list-style: none; cursor: pointer; padding: 8px 12px; border: 1px solid var(--s-line); border-radius: 8px; font-weight: 600; font-size: 14px; }
.menu-toggle summary::-webkit-details-marker { display: none; }
.menu-panel { position: absolute; right: 16px; top: 62px; background: #fff; border: 1px solid var(--s-line); border-radius: 12px; box-shadow: 0 12px 32px rgba(15, 23, 42, .12); padding: 12px; display: grid; gap: 6px; min-width: 220px; }
.menu-panel a { padding: 8px 10px; border-radius: 8px; color: var(--s-text); text-decoration: none; }
.menu-panel a:hover { background: var(--s-soft); text-decoration: none; }

/* Giris bolumu */
.hero { padding: 72px 0 64px; background: #fff; }
.hero-grid { display: grid; grid-template-columns: 1.02fr 1.18fr; gap: 48px; align-items: center; }
.hero .lead { max-width: 560px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 22px; }
.hero-points { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; color: var(--s-body); font-size: 15px; }
.hero-points li { display: flex; gap: 10px; align-items: flex-start; }
.check { flex: 0 0 20px; width: 20px; height: 20px; border-radius: 50%; background: var(--s-text); color: #fff; display: grid; place-items: center; font-size: 11px; font-weight: 800; margin-top: 3px; }
.hero-visual { position: relative; }

/* Guven cubugu */
.trust { border-top: 1px solid var(--s-line); border-bottom: 1px solid var(--s-line); background: #fff; }
.trust .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.trust-item { padding: 22px 18px; border-left: 1px solid var(--s-line); }
.trust-item:first-child { border-left: 0; }
.trust-item strong { display: block; color: var(--s-text); font-size: 15px; }
.trust-item span { color: var(--s-muted); font-size: 14px; }

/* Kartlar */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card { background: #fff; border: 1px solid var(--s-line); border-radius: var(--s-radius); padding: 26px; }
.card p { color: var(--s-muted); font-size: 15px; margin: 0; }
.card-icon { width: 44px; height: 44px; border-radius: 12px; background: var(--s-soft); border: 1px solid var(--s-line); color: var(--s-text); display: grid; place-items: center; margin-bottom: 16px; }
.card-icon svg { width: 22px; height: 22px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.tag { font-size: 13px; padding: 4px 10px; border-radius: 999px; background: var(--s-soft); border: 1px solid var(--s-line); color: var(--s-body); }

/* Iki sutunlu anlatim */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split.reverse .split-media { order: -1; }
.feature-list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 14px; }
.feature-list li { display: grid; grid-template-columns: 20px 1fr; gap: 12px; }
.feature-list strong { color: var(--s-text); }

/* Adimlar */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
.step { position: relative; padding: 26px 26px 26px 26px; border: 1px solid var(--s-line); border-radius: var(--s-radius); background: #fff; }
.step::before { counter-increment: step; content: counter(step); display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--s-text); color: #fff; font-weight: 700; margin-bottom: 14px; }
.step p { color: var(--s-muted); font-size: 15px; margin: 0; }

/* Guvenlik */
.security { background: #0b0f17; color: #cbd5e1; }
.security h2, .security h3 { color: #fff; }
.security .eyebrow { color: #9ca3af; }
.security .lead { color: #94a3b8; }
.security .card { background: #131a26; border-color: #1f2937; }
.security .card p { color: #94a3b8; }
.security .card-icon { background: #1f2937; border-color: #374151; color: #fff; }

/* Lisans */
.pricing { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 28px; align-items: stretch; }
.price-card { border: 1px solid var(--s-line); border-radius: var(--s-radius); padding: 30px; background: #fff; }
.price-card.highlight { border-color: var(--s-text); }
.price-card ul { padding-left: 18px; margin: 12px 0 0; color: var(--s-body); }
.price-card li { margin-bottom: 6px; }

/* SSS */
.faq { max-width: 820px; margin: 0 auto; display: grid; gap: 12px; }
.faq details { border: 1px solid var(--s-line); border-radius: 12px; background: #fff; padding: 0 20px; }
.faq summary { cursor: pointer; list-style: none; padding: 18px 0; font-weight: 650; color: var(--s-text); display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--s-text); font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--s-muted); padding-bottom: 18px; margin: 0; }

/* Cagri bandi */
.cta { background: var(--s-text); color: #e5e7eb; border-radius: 20px; padding: 48px; display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; }
.cta h2 { color: #fff; }
.cta p { margin: 0; color: #d1d5db; }
.cta .btn-ghost { border-color: transparent; }

/* Iletisim + alt bilgi */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.site-footer { border-top: 1px solid var(--s-line); padding: 40px 0 28px; color: var(--s-muted); font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.footer-grid h4 { color: var(--s-text); font-size: 14px; margin: 0 0 10px; }
.footer-grid a { display: block; color: var(--s-muted); margin-bottom: 6px; text-decoration: none; }
.footer-bottom { border-top: 1px solid var(--s-line); margin-top: 28px; padding-top: 18px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* Mobil */
@media (max-width: 1000px) {
  .site-nav, .header-actions { display: none; }
  .menu-toggle { display: block; }
  .hero-grid, .split, .pricing, .cta { grid-template-columns: 1fr; }
  .split.reverse .split-media { order: 0; }
  .grid-3, .grid-4, .steps, .contact-grid { grid-template-columns: 1fr 1fr; }
  .trust .container { grid-template-columns: 1fr 1fr; }
  .trust-item:nth-child(3) { border-left: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 60px 0; }
  .hero { padding: 44px 0; }
  .grid-3, .grid-4, .steps, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
  .trust .container { grid-template-columns: 1fr; }
  .trust-item { border-left: 0; border-top: 1px solid var(--s-line); }
  .trust-item:first-child { border-top: 0; }
  .cta { padding: 32px 24px; }
}

/* Giris / basvuru (Pages/Account/_AuthLayout) */
.auth-body { background: #fff; }
.auth-shell { display: grid; grid-template-columns: 1fr 1fr; min-height: 100vh; }
/* Masaustunde sayfa TAM ekran yuksekliginde sabit, sayfa kaymaz; ekran cok kisaysa yalnizca form sutunu kayar (02.10.2026). */
@media (min-width: 901px) {
  .auth-body { overflow: hidden; }
  .auth-shell { height: 100vh; height: 100dvh; min-height: 0; }
  .auth-main { overflow-y: auto; }
}
/* Sol panel: ozgun dalga gorseli + ortada tek kelime marka (02.10.2026). */
.auth-aside { background: #0c1e17 url("/img/site/auth-waves.svg") center / cover no-repeat; display: flex; align-items: center; justify-content: center; padding: 40px; }
.auth-wordmark { color: #f8f7f2; text-decoration: none; font-weight: 800; font-size: clamp(72px, 8.5vw, 136px); letter-spacing: -0.045em; line-height: 1; text-shadow: 0 10px 40px rgba(0, 0, 0, 0.28); }
.auth-wordmark sup { font-size: 0.24em; font-weight: 700; letter-spacing: 0; vertical-align: top; position: relative; top: 0.34em; margin-left: 0.04em; }
.auth-main { display: flex; flex-direction: column; padding: 22px 40px 24px; }
.auth-top { display: flex; align-items: center; justify-content: flex-end; gap: 12px; }
.auth-brand-mobile { display: none; margin-right: auto; }
.auth-home { font-size: 14px; color: var(--s-muted); text-decoration: none; }
.auth-home:hover { color: var(--s-text); }
.auth-panel { width: 100%; max-width: 400px; margin: auto; padding: 16px 0; }
.auth-title { font-size: 30px; margin-bottom: 6px; }
.auth-sub { color: var(--s-muted); margin-bottom: 26px; }
.auth-form { display: grid; gap: 16px; }
.auth-field { display: grid; gap: 6px; font-size: 14px; font-weight: 600; color: var(--s-text); }
.auth-field input, .auth-field select, .auth-field textarea { font: inherit; font-weight: 400; font-size: 15px; color: var(--s-text); padding: 11px 13px; border: 1px solid #d1d5db; border-radius: 10px; background: #fff; width: 100%; }
.auth-field input:focus, .auth-field select:focus, .auth-field textarea:focus { outline: none; border-color: var(--s-text); box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.08); }
.auth-submit { width: 100%; padding: 13px 22px; }
.auth-errors { color: #b91c1c; font-size: 14px; }
.auth-errors ul { margin: 0; padding-left: 18px; }
.auth-errors.validation-summary-valid { display: none; }
.auth-notice { border: 1px solid #bbf7d0; background: #f0fdf4; color: #166534; border-radius: 10px; padding: 12px 14px; font-size: 14px; margin-bottom: 18px; }
.auth-divider { display: flex; align-items: center; gap: 12px; margin: 30px 0 16px; color: var(--s-muted); font-size: 13px; }
.auth-divider::before, .auth-divider::after { content: ""; flex: 1; height: 1px; background: var(--s-line); }
.auth-alt p { color: var(--s-muted); font-size: 14px; margin-bottom: 14px; }
@media (max-width: 900px) {
  .auth-shell { grid-template-columns: 1fr; }
  .auth-aside { display: none; }
  .auth-brand-mobile { display: inline-flex; }
  .auth-main { padding: 20px 20px 32px; }
}

/* Basvuru formu (genis panel) */
.auth-panel-wide { max-width: 720px; }
.auth-section { border: 1px solid var(--s-line); border-radius: 14px; padding: 18px 18px 8px; margin: 0; }
.auth-section legend { font-weight: 700; color: var(--s-text); padding: 0 8px; font-size: 15px; }
.auth-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 10px; }
.auth-grid .span-2 { grid-column: 1 / -1; }
.auth-hint { color: var(--s-muted); font-size: 13px; margin: 4px 0 10px; }
.auth-check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--s-body); margin: 12px 0 10px; }
.auth-check input { margin-top: 3px; }
.auth-success { text-align: center; }
.auth-success-icon { width: 64px; height: 64px; border-radius: 50%; background: var(--s-text); color: #fff; display: grid; place-items: center; font-size: 28px; font-weight: 800; margin: 0 auto 18px; }
@media (max-width: 640px) { .auth-grid { grid-template-columns: 1fr; } }