/* Sefer Saatleri — shared styles */
:root {
  --bg: #0d1b2e;
  --bg-elev: #162234;
  --bg-elev-2: #1c2c42;
  --border: #24374f;
  --text: #ffffff;
  --text-muted: #9fb0c3;
  --text-dim: #6b7d92;
  --accent: #1A7FD4;
  --accent-hover: #2b93e8;
  --max: 1080px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 27, 46, 0.85);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 17px; }
.brand img { width: 34px; height: 34px; border-radius: 9px; display: block; }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { color: var(--text-muted); font-size: 15px; font-weight: 500; transition: color .18s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-cta {
  background: var(--accent); color: #fff !important;
  padding: 9px 16px; border-radius: 10px; font-weight: 600;
}
.nav-cta:hover { background: var(--accent-hover); }

@media (max-width: 640px) {
  .nav-links { gap: 16px; }
  .nav-links a.hide-mobile { display: none; }
}

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 72px 20px 56px; }
.hero .logo {
  width: 104px; height: 104px; border-radius: 24px; overflow: hidden;
  margin: 0 auto 26px; box-shadow: 0 8px 32px rgba(0,0,0,.4);
}
.hero .logo img { width: 100%; height: 100%; display: block; }
.hero h1 { font-size: 44px; font-weight: 800; letter-spacing: -1.2px; margin-bottom: 14px; }
.hero .tagline { font-size: 19px; color: var(--text-muted); max-width: 560px; margin: 0 auto 36px; }

@media (max-width: 640px) { .hero h1 { font-size: 34px; } .hero .tagline { font-size: 17px; } }

/* ---------- Buttons ---------- */
.store-buttons { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 12px; font-size: 16px; font-weight: 600;
  transition: opacity .2s, transform .1s;
}
.btn:hover { opacity: .9; }
.btn:active { transform: translateY(1px); }
.btn-ios { background: #fff; color: #000; }
.btn-android { background: var(--accent); color: #fff; }

/* ---------- Sections ---------- */
.section { padding: 56px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 40px; }
.section-head h2 { font-size: 30px; font-weight: 800; letter-spacing: -.6px; margin-bottom: 12px; }
.section-head p { color: var(--text-muted); font-size: 17px; }
.eyebrow { color: var(--accent); font-weight: 700; font-size: 13px; letter-spacing: 1.4px; text-transform: uppercase; margin-bottom: 12px; }

/* ---------- Features ---------- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 16px; padding: 26px; text-align: left;
}
.feature-icon { font-size: 30px; margin-bottom: 14px; }
.feature-title { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.feature-desc { font-size: 14.5px; color: var(--text-muted); }

@media (max-width: 780px) { .features { grid-template-columns: 1fr; } }

/* ---------- Blog cards ---------- */
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.post-card {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 16px; overflow: hidden; display: flex; flex-direction: column;
  transition: border-color .2s, transform .2s;
}
.post-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.post-thumb {
  height: 150px; display: flex; align-items: center; justify-content: center;
  font-size: 52px; background: linear-gradient(135deg, #14304f, #0f2138);
  overflow: hidden;
}
.post-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.post-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.post-meta { font-size: 12.5px; color: var(--text-dim); margin-bottom: 10px; letter-spacing: .3px; }
.post-body h3 { font-size: 18px; font-weight: 700; line-height: 1.35; margin-bottom: 10px; }
.post-excerpt { font-size: 14px; color: var(--text-muted); flex: 1; }
.post-more { margin-top: 16px; color: var(--accent); font-weight: 600; font-size: 14.5px; }

@media (max-width: 780px) { .post-grid { grid-template-columns: 1fr; } }

/* ---------- Article ---------- */
.article { padding: 48px 0 64px; }
.article-wrap { max-width: 720px; margin: 0 auto; }
.breadcrumb { font-size: 13.5px; color: var(--text-dim); margin-bottom: 22px; }
.breadcrumb a:hover { color: var(--accent); }
.article h1 { font-size: 38px; font-weight: 800; letter-spacing: -.8px; line-height: 1.2; margin-bottom: 16px; }
.article-meta { color: var(--text-dim); font-size: 14px; margin-bottom: 28px; }
.article-hero { width: 100%; border-radius: 16px; border: 1px solid var(--border); display: block; margin-bottom: 32px; padding-bottom: 0; }
.article-body { font-size: 17px; color: #e4ebf3; }
.article-body h2 { font-size: 25px; font-weight: 700; margin: 40px 0 14px; letter-spacing: -.3px; }
.article-body h3 { font-size: 20px; font-weight: 700; margin: 28px 0 10px; }
.article-body p { margin-bottom: 18px; }
.article-body ul, .article-body ol { margin: 0 0 18px 22px; }
.article-body li { margin-bottom: 8px; }
.article-body a { color: var(--accent); }
.article-body a:hover { text-decoration: underline; }
.article-body strong { color: #fff; }
/* Yazı içindeki butonların metin rengi link kuralından etkilenmesin */
.article-body a.btn-ios { color: #000; }
.article-body a.btn-android { color: #fff; }
.article-body a.btn:hover { text-decoration: none; }

@media (max-width: 640px) { .article h1 { font-size: 29px; } .article-body { font-size: 16px; } }

/* App callout inside articles */
.app-callout {
  background: linear-gradient(135deg, #14304f, #12233a);
  border: 1px solid var(--border);
  border-radius: 16px; padding: 26px; margin: 34px 0;
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
}
.app-callout .cimg { width: 58px; height: 58px; border-radius: 14px; flex-shrink: 0; }
.app-callout .ctext { flex: 1; min-width: 220px; }
.app-callout h4 { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.app-callout p { font-size: 14.5px; color: var(--text-muted); margin: 0; }
.app-callout .cbtns { display: flex; gap: 10px; flex-wrap: wrap; }
.app-callout .cbtns .btn { padding: 11px 16px; font-size: 14.5px; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(135deg, #14304f, #0f2138);
  border: 1px solid var(--border); border-radius: 20px;
  padding: 44px 28px; text-align: center; margin: 20px 0;
}
.cta-band h2 { font-size: 27px; font-weight: 800; margin-bottom: 10px; }
.cta-band p { color: var(--text-muted); margin-bottom: 26px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 40px 0; margin-top: 40px; }
.footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.footer-brand img { width: 30px; height: 30px; border-radius: 8px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a { color: var(--text-muted); font-size: 14.5px; }
.footer-links a:hover { color: var(--accent); }
.footer-copy { color: var(--text-dim); font-size: 13px; margin-top: 24px; }