/* Temiz ve duyarlı temel stiller */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #fff;
  min-height: 100vh;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  padding: 24px 0;
  border-bottom: 1px solid #e5e7eb;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: #111827;
}

nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

nav a {
  color: #2563eb;
  text-decoration: none;
  font-size: 0.95rem;
}

nav a:hover {
  text-decoration: underline;
}

main {
  padding-bottom: 48px;
}

.hero {
  padding: 40px 0 40px;
  margin-bottom: 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 32px;
  align-items: center;
}

.hero-text h1 {
  font-size: 2.4rem;
  font-weight: 700;
  margin: 0 0 12px;
  color: #111827;
}

.hero-text p {
  font-size: 1.05rem;
  color: #4b5563;
  margin: 0 0 10px;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.phone-mock {
  width: 220px;
  height: 420px;
  border-radius: 32px;
  padding: 10px;
  background: linear-gradient(145deg, #e5e7eb, #f9fafb);
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.18);
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 24px;
  background: radial-gradient(circle at top, #eff6ff 0%, #ffffff 45%, #e5e7eb 100%);
  padding: 14px 14px 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.screen-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-size: 0.75rem;
  color: #4b5563;
}

.screen-title {
  font-weight: 600;
}

.screen-date {
  font-size: 0.72rem;
}

.screen-lines {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

.line {
  height: 6px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.08);
}

.line-strong {
  height: 8px;
  background: rgba(37, 99, 235, 0.32);
}

.line.short {
  width: 60%;
}

.divider {
  height: 1px;
  margin: 8px 0 2px;
  background: rgba(15, 23, 42, 0.12);
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 18px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: #eef2ff;
  color: #3730a3;
  font-weight: 600;
  font-size: 0.9rem;
}

.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #2563eb;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  background: #2563eb;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: background 0.2s;
}

.btn:hover {
  background: #1d4ed8;
  text-decoration: none;
}

.btn-secondary {
  background: #fff;
  color: #2563eb;
  border: 1px solid #2563eb;
}

.btn-secondary:hover {
  background: #eff6ff;
}

section {
  margin-bottom: 48px;
}

section h2 {
  margin-top: 0;
  margin-bottom: 20px;
  font-size: 1.75rem;
  font-weight: 600;
  color: #111827;
}

section h3 {
  margin-top: 24px;
  margin-bottom: 12px;
  font-size: 1.25rem;
  font-weight: 600;
  color: #1f2937;
}

section p {
  margin-bottom: 12px;
  color: #4b5563;
}

.faq-item {
  margin-bottom: 24px;
}

.faq-item strong {
  display: block;
  margin-bottom: 8px;
  color: #1f2937;
  font-weight: 600;
}

.faq-item p {
  margin-bottom: 0;
}

ul, ol {
  margin: 12px 0;
  padding-left: 24px;
  color: #4b5563;
}

li {
  margin-bottom: 8px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.card {
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 16px 16px 14px;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.1rem;
  color: #111827;
}

.card p {
  margin-bottom: 8px;
}

.card small {
  color: #6b7280;
}

.last-updated {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid #e5e7eb;
  font-size: 0.9rem;
  color: #6b7280;
}

footer {
  border-top: 1px solid #e5e7eb;
  padding-top: 24px;
  padding-bottom: 32px;
  margin-top: 48px;
  font-size: 0.9rem;
  color: #6b7280;
}

footer a {
  color: #2563eb;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.back-to-top {
  display: inline-block;
  margin-top: 12px;
  color: #2563eb;
  text-decoration: none;
  font-weight: 500;
}

.back-to-top:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }

  header {
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  nav {
    gap: 12px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .hero-text h1 {
    font-size: 2rem;
  }
}

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