/* ISON MRP tanıtım sitesi — uygulamanın kimliği: açık zemin + #0a84ff mavi (macOS-vari).
   Kendi kendine yeter: harici font/CDN yok (sistem yazı yığını), tek CSS. */
:root {
  --accent: #0a84ff;
  --accent-deep: #0668cc;
  --accent-tint: #e9f3ff;
  --ink: #16222e;
  --muted: #5c6b7a;
  --ground: #f6f8fb;
  --panel: #ffffff;
  --hairline: #dfe5ec;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(22, 40, 60, .10), 0 1px 3px rgba(22, 40, 60, .06);
  --wrap: 1120px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--ground);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
code { background: var(--accent-tint); padding: 1px 6px; border-radius: 6px; font-size: .92em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.small { font-size: 13px; }
.muted { color: var(--muted); }

h1, h2, h3 { line-height: 1.18; letter-spacing: -0.015em; text-wrap: balance; }
h2 { font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 10px; }
.section-lead { color: var(--muted); max-width: 62ch; margin-bottom: 34px; font-size: 17px; }

/* ---------- butonlar ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 12px; font-weight: 600; font-size: 16px;
  border: 1px solid transparent; cursor: pointer; transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 6px 18px rgba(10, 132, 255, .35); }
.btn-primary:hover { background: var(--accent-deep); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--hairline); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-light { background: #fff; color: var(--accent-deep); box-shadow: 0 6px 18px rgba(0, 30, 60, .25); }
.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 10px; }
.btn-xl { padding: 16px 34px; font-size: 18px; border-radius: 14px; }

/* ---------- üst çubuk ---------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: rgba(255, 255, 255, .82); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--hairline);
}
.topbar-in { display: flex; align-items: center; gap: 28px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-size: 18px; }
.brand img { height: 30px; width: auto; }
.brand b { color: var(--accent); }
.topnav { display: flex; gap: 22px; margin-left: auto; }
.topnav a { color: var(--muted); font-size: 14.5px; font-weight: 500; }
.topnav a:hover { color: var(--accent); }

/* ---------- hero ---------- */
.hero {
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(10, 132, 255, .14), transparent 60%),
    radial-gradient(700px 380px at -10% 30%, rgba(120, 90, 220, .08), transparent 55%),
    linear-gradient(#fbfcfe, var(--ground));
  border-bottom: 1px solid var(--hairline);
}
.hero-in { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 48px; align-items: center; padding-top: 72px; padding-bottom: 84px; }
.eyebrow { color: var(--accent-deep); font-weight: 700; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 14px; }
.hero h1 { font-size: clamp(30px, 4.2vw, 46px); margin-bottom: 18px; }
.lead { font-size: 18px; color: var(--muted); margin-bottom: 26px; max-width: 54ch; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 26px; }
.hero-ticks { list-style: none; display: grid; gap: 8px; }
.hero-ticks li { padding-left: 26px; position: relative; color: var(--muted); font-size: 15px; }
.hero-ticks li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

.hero-shot { cursor: zoom-in; }
.browser-frame { background: #fff; border: 1px solid var(--hairline); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.browser-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; background: #eef1f5; border-bottom: 1px solid var(--hairline); }
.browser-bar i { width: 11px; height: 11px; border-radius: 50%; background: #d5dae1; }
.browser-bar i:nth-child(1) { background: #ff5f57; } .browser-bar i:nth-child(2) { background: #febc2e; } .browser-bar i:nth-child(3) { background: #28c840; }
.browser-bar span { margin-left: 10px; font-size: 12px; color: var(--muted); background: #fff; border: 1px solid var(--hairline); border-radius: 7px; padding: 2px 40px; }

/* ---------- ETA uyum bandı ---------- */
.tape { background: #fff; border-bottom: 1px solid var(--hairline); }
.tape-in { display: flex; align-items: center; gap: 28px; padding: 22px 24px; }
.tape-logo { height: 52px; width: auto; flex: none; }
.tape p { color: var(--muted); font-size: 15px; max-width: 78ch; }

/* ---------- bölümler ---------- */
.section { padding: 78px 0; }
.section-alt { background: #fff; border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }

.grid { display: grid; gap: 18px; }
.features { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.card { background: var(--panel); border: 1px solid var(--hairline); border-radius: var(--radius); padding: 22px; }
.features .card { transition: box-shadow .15s ease, transform .15s ease; }
.features .card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.fi { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 11px; background: color-mix(in srgb, var(--c) 14%, #fff); color: var(--c); font-size: 19px; margin-bottom: 12px; }
.card h3 { font-size: 16.5px; margin-bottom: 6px; }
.card p { font-size: 14px; color: var(--muted); }

/* ---------- ekran vitrini ---------- */
.showcase { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.shot { background: #fff; border: 1px solid var(--hairline); border-radius: var(--radius); overflow: hidden; cursor: zoom-in; box-shadow: 0 2px 10px rgba(22, 40, 60, .05); transition: box-shadow .15s ease, transform .15s ease; }
.shot:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.shot img { aspect-ratio: 16/10; object-fit: cover; object-position: top left; border-bottom: 1px solid var(--hairline); }
.shot figcaption { padding: 14px 16px; display: grid; gap: 2px; }
.shot figcaption b { font-size: 15px; }
.shot figcaption span { font-size: 13px; color: var(--muted); }

/* ---------- ETA bölümü ---------- */
.eta-band { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); gap: 44px; align-items: center; }
.ticks { list-style: none; display: grid; gap: 10px; margin: 18px 0; }
.ticks li { padding-left: 28px; position: relative; }
.ticks li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--accent); font-weight: 800; }
.eta-logo-card { background: #fff; border: 1px solid var(--hairline); border-radius: var(--radius); box-shadow: var(--shadow); padding: 34px; display: grid; place-items: center; }
.eta-logo-card img { max-height: 110px; width: auto; }

/* ---------- deneme CTA ---------- */
.cta-band { background: linear-gradient(120deg, var(--accent-deep), var(--accent) 70%); color: #fff; }
.cta-in { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding-top: 52px; padding-bottom: 52px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; }
.cta-band p { max-width: 60ch; opacity: .92; }

/* ---------- kurulum adımları ---------- */
.steps { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.step { position: relative; padding-top: 30px; }
.step-no { position: absolute; top: -18px; left: 20px; width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; background: var(--accent); color: #fff; font-weight: 800; font-size: 17px; box-shadow: 0 4px 12px rgba(10, 132, 255, .4); }

/* ---------- indirme ---------- */
.dl-band { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: 44px; align-items: start; }
.req { list-style: none; display: grid; gap: 9px; margin: 12px 0 14px; }
.req li { padding-left: 24px; position: relative; font-size: 14.5px; }
.req li::before { content: "•"; position: absolute; left: 6px; color: var(--accent); font-weight: 800; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--hairline); background: #fff; }
.footer-in { display: flex; align-items: center; gap: 24px; padding: 26px 24px; flex-wrap: wrap; }
.brand-footer { font-size: 15px; }
.brand-footer img { height: 24px; }
.footer p { color: var(--muted); font-size: 13px; flex: 1; min-width: 260px; }
.footer nav { display: flex; gap: 18px; font-size: 13.5px; }

/* ---------- lightbox ---------- */
/* DİKKAT: aşağıdaki display:grid, hidden özniteliğinin UA varsayılanını (display:none) EZER —
   [hidden] kuralı olmadan lightbox açılışta görünür kalır ve kapanmaz (canlı yakalandı). */
.lightbox[hidden] { display: none; }
.lightbox { position: fixed; inset: 0; z-index: 90; background: rgba(10, 18, 26, .88); display: grid; place-items: center; padding: 4vmin; cursor: zoom-out; }
.lightbox img { max-width: 94vw; max-height: 90vh; border-radius: 10px; box-shadow: 0 20px 60px rgba(0, 0, 0, .5); }
.lb-close { position: fixed; top: 18px; right: 24px; color: #fff; font-size: 15px; opacity: .8; }

/* ---------- duyarlılık ---------- */
@media (max-width: 900px) {
  .hero-in { grid-template-columns: 1fr; padding-top: 48px; padding-bottom: 56px; }
  .eta-band, .dl-band { grid-template-columns: 1fr; }
  .topnav { display: none; }
  .tape-in { flex-direction: column; text-align: center; gap: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .features .card, .shot { transition: none; }
}