/* Renkler: metin/arka plan kontrastı WCAG AA (4.5:1) üzerinde seçildi. */
:root {
  --text: #1a1f2b;
  --muted: #4a5263;
  --bg: #ffffff;
  --bg-alt: #f3f5f9;
  --primary: #1d4ed8;
  --primary-dark: #1e3a8a;
  --primary-soft: #e8eefc;
  --line: #d9dee7;
  --border: #6b7280;
  --error: #b42318;
  --error-bg: #fef3f2;
  --success: #067647;
  --success-bg: #ecfdf3;
  --focus: #f59e0b;
  --radius: 10px;
  --shadow: 0 6px 24px rgba(26, 31, 43, 0.08);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

h1, h2, h3 { line-height: 1.25; margin: 0 0 0.75rem; }
h1 { font-size: clamp(1.9rem, 5vw, 3rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1rem; }

.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }

/* Klavye kullanıcıları için belirgin odak halkası */
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.skip-link {
  position: absolute; left: 16px; top: -100px;
  background: var(--text); color: #fff; padding: 0.5rem 1rem; z-index: 20;
}
.skip-link:focus { top: 8px; }

/* ---------- Üst bar ---------- */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 16px; padding-top: 12px; padding-bottom: 12px; }
.logo {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 1.25rem; color: var(--primary-dark); text-decoration: none;
}
.logo-mark {
  width: 22px; height: 22px; border-radius: 6px;
  background: linear-gradient(135deg, var(--primary) 0 50%, var(--primary-dark) 50% 100%);
}
.main-nav { display: none; gap: 24px; margin-left: auto; }
.main-nav a { color: var(--text); text-decoration: none; font-weight: 500; }
.main-nav a:hover { color: var(--primary); }
.header-inner .btn { margin-left: auto; }

/* ---------- Butonlar ---------- */
.btn {
  display: inline-block;
  font: inherit; font-weight: 600; text-align: center;
  color: #fff; background: var(--primary);
  border: 2px solid var(--primary); border-radius: var(--radius);
  padding: 0.7rem 1.4rem;
  text-decoration: none; cursor: pointer;
}
.btn:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn:disabled { opacity: 0.7; cursor: wait; }
.btn-small { padding: 0.4rem 0.9rem; font-size: 0.95rem; }
.btn-ghost { color: var(--primary-dark); background: transparent; }
.btn-ghost:hover { color: #fff; }
.btn-block { width: 100%; }

/* ---------- Hero ---------- */
.hero { padding: 48px 0 56px; background: linear-gradient(180deg, var(--primary-soft), var(--bg)); }
.hero-grid { display: grid; gap: 40px; align-items: center; }
.eyebrow { color: var(--primary-dark); font-weight: 600; font-size: 0.95rem; margin-bottom: 0.5rem; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 36em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 1.5rem 0; }
.checks { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 20px; color: var(--muted); }
.checks li::before { content: "✓"; color: var(--success); font-weight: 700; margin-right: 6px; }

/* Örnek akış kartı (yalnızca HTML/CSS) */
.flow-card {
  margin: 0; background: var(--bg); border: 1px solid var(--line);
  border-radius: 16px; padding: 24px; box-shadow: var(--shadow);
}
.flow-title { font-weight: 700; margin-bottom: 16px; }
.flow { list-style: none; margin: 0; padding: 0; }
.flow li { position: relative; display: flex; gap: 14px; align-items: flex-start; padding-bottom: 20px; }
.flow li:last-child { padding-bottom: 0; }
/* Adımları birleştiren dikey çizgi */
.flow li:not(:last-child)::after {
  content: ""; position: absolute; left: 15px; top: 34px; bottom: 4px;
  width: 2px; background: var(--line);
}
.flow small { display: block; color: var(--muted); }
.flow-dot {
  flex: none; width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--primary-soft); color: var(--primary-dark); font-weight: 700;
}
.flow-dot-done { background: var(--success-bg); color: var(--success); }

/* ---------- Bölümler ---------- */
.section { padding: 56px 0; }
section[id] { scroll-margin-top: 64px; } /* yapışkan üst bar başlığı kapatmasın */
.section-alt { background: var(--bg-alt); }
.section-lead { color: var(--muted); margin-bottom: 2rem; }

.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.steps li { border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.steps p { margin: 0; color: var(--muted); }
.step-no {
  display: inline-grid; place-items: center; width: 36px; height: 36px; margin-bottom: 12px;
  border-radius: 50%; background: var(--primary); color: #fff; font-weight: 700;
}

.cards { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.card p { margin: 0; color: var(--muted); }
.icon {
  width: 40px; height: 40px; padding: 8px; margin-bottom: 12px;
  border-radius: 10px; background: var(--primary-soft);
  fill: none; stroke: var(--primary-dark); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}

.examples { display: grid; gap: 16px; }
.example { border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.example dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 8px 12px; }
.example dt { font-weight: 700; font-size: 0.85rem; padding: 2px 8px; border-radius: 6px; align-self: start; }
.example dt:nth-of-type(1) { background: var(--error-bg); color: var(--error); }
.example dt:nth-of-type(2) { background: var(--success-bg); color: var(--success); }
.example dd { margin: 0; color: var(--muted); }

/* ---------- Form bölümü ---------- */
.form-grid { display: grid; gap: 32px; align-items: start; }
.form-intro h3 { margin-top: 1.5rem; }
.next-steps { padding-left: 1.25rem; margin: 0 0 1rem; color: var(--muted); }
.next-steps li { margin-bottom: 0.4rem; }
.note { font-size: 0.95rem; color: var(--muted); }

.form-card {
  background: var(--bg); border: 1px solid var(--line); border-radius: 16px;
  padding: 24px 20px; box-shadow: var(--shadow);
}
.form-required { color: var(--muted); font-size: 0.95rem; }

.field { margin-bottom: 1.25rem; }
label { display: block; font-weight: 600; margin-bottom: 0.35rem; }

input, select, textarea {
  width: 100%;
  font: inherit; color: var(--text);
  background: #fff;
  border: 1px solid var(--border); border-radius: 8px;
  padding: 0.65rem 0.75rem;
}
textarea { resize: vertical; }

[aria-invalid="true"] { border-color: var(--error); border-width: 2px; }

.hint { font-size: 0.9rem; color: var(--muted); margin: 0.3rem 0 0; }
.field-error { color: var(--error); font-size: 0.95rem; font-weight: 600; margin: 0.3rem 0 0; }
.field-error:empty { display: none; }

/* Honeypot alanı ekran dışında; display:none bazı botlar tarafından atlanır */
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

.form-status { margin-top: 1.25rem; border-radius: 8px; }
.form-status:empty { display: none; }
.form-status.is-success { padding: 1rem; color: var(--success); background: var(--success-bg); border: 1px solid var(--success); }
.form-status.is-error { padding: 1rem; color: var(--error); background: var(--error-bg); border: 1px solid var(--error); }
.form-status.is-pending { padding: 1rem; color: var(--muted); background: var(--bg-alt); }

/* ---------- SSS ---------- */
.faq details { border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 12px; background: var(--bg); }
.faq summary { cursor: pointer; font-weight: 600; padding: 16px 20px; }
.faq details p { margin: 0; padding: 0 20px 16px; color: var(--muted); }

/* ---------- Alt bilgi ---------- */
.site-footer { padding: 32px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.95rem; }
.footer-inner { display: grid; gap: 12px; }
.site-footer p { margin: 0; }

/* ---------- Tablet ---------- */
@media (min-width: 700px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .examples { grid-template-columns: repeat(3, 1fr); }
  .form-card { padding: 32px; }
  .section { padding: 72px 0; }
}

/* ---------- Masaüstü ---------- */
@media (min-width: 960px) {
  .main-nav { display: flex; }
  .header-inner .btn { margin-left: 8px; }
  .hero { padding: 88px 0 96px; }
  .hero-grid { grid-template-columns: 1.15fr 0.85fr; gap: 56px; }
  .cards { grid-template-columns: repeat(4, 1fr); }
  .form-grid { grid-template-columns: 0.9fr 1.1fr; gap: 56px; }
  .footer-inner { grid-template-columns: auto 1fr; align-items: center; gap: 32px; }
}