/* ==========================================================================
   MAIN.CSS - Temel Düzen, Izgara (Grid) ve Sayfa Iskeleti
   ========================================================================== */

/* --- TEMA VE GLOBAL DEĞİŞKENLER --- */
:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --border-color: #334155;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

/* --- RESET & TEMEL STİLLER --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
}

/* --- KONTEYNER VE YARDIMCI SINIFLAR --- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.text-center { text-align: center; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

/* --- HEADER & NAVIGASYON --- */
.navbar {
  background-color: rgba(30, 41, 59, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.8rem 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.3rem;
  transition: opacity 0.2s;
}

.logo:hover {
  opacity: 0.9;
}

.logo-icon { font-size: 1.5rem; }

/* --- HERO BÖLÜMÜ --- */
.hero {
  padding: 3.5rem 0 2.5rem;
}

.hero h1 {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 0.6rem;
  background: linear-gradient(to right, #818cf8, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* --- ARAÇLAR İZGARASI (GRID LAYOUT) --- */
.tools-section {
  padding: 1.5rem 0 4rem;
}

.section-title {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  border-left: 4px solid var(--accent);
  padding-left: 0.75rem;
  color: var(--text-primary);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* --- FOOTER LAYOUT --- */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding: 1.5rem 0;
  background-color: var(--bg-secondary);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}