/* --- Değişkenler --- */
:root {
  --bg: #0f0f12;
  --bg-card: #18181c;
  --bg-elevated: #1e1e24;
  --text: #e8e8ec;
  --text-muted: #9a9aa8;
  --accent: #7c3aed;
  --accent-hover: #8b5cf6;
  --border: #2d2d35;
  --radius: 8px;
  --radius-lg: 12px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Consolas', 'Monaco', monospace;
  --header-h: 60px;
  --container: 1200px;
  --space: 1rem;
  --transition: 0.2s ease;
}

/* --- Sıfırlama --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  background-image: var(--logo-bg);
  background-repeat: no-repeat;
  background-position: left center;
  background-size: auto 70vh;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
ul, ol { margin: 0; padding: 0; list-style: none; }

/* --- Layout --- */
.main-content {
  flex: 1;
  padding: var(--space) var(--space) 2rem;
}
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space);
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
}
.logo:hover { color: var(--accent); }

/* --- Footer --- */
.site-footer {
  margin-top: auto;
  padding: 2rem var(--space);
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer-inner { max-width: var(--container); margin: 0 auto; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; margin-bottom: 1rem; }
.footer-link {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.footer-link:hover { color: var(--accent); }
.footer-copy, .footer-legal { color: var(--text-muted); font-size: 0.85rem; margin: 0.25rem 0; }
.footer-legal a { color: var(--text-muted); }
.footer-legal a:hover { color: var(--text); }

/* --- Tipografi --- */
h1, h2, h3, h4 { margin: 0 0 0.5em; font-weight: 600; line-height: 1.2; }
h1 { font-size: 1.75rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.section-title { margin-bottom: 1rem; }