/* 
 * İlik & Düğme Teması CSS (ilikdugme-temel)
 * Tasarım Konsepti: Açık Renk, Güven Veren, Modern Tekstil Dokulu
 */

:root {
  /* Renk Paleti (Açık ve Ferah) */
  --c-bg: #FCFCFD; /* Kırık beyaz */
  --c-surface: #F4F5F8; /* Yumuşak açık gri */
  --c-surface-hover: #EAECEF;
  --c-primary: #4A6FA5; /* Tekstile yakışan kurumsal mavi */
  --c-primary-hover: #3b5c8c;
  --c-accent: #8FA6C8; /* Pastel mavi vurgular */
  --c-text: #2C3545; /* Çok koyu lacivert/gri - okunabilirlik için siyah yerine */
  --c-text-muted: #5D6B82;
  --c-border: #E5E8EC;
  
  /* Callout Box Renkleri (Negatif filtre uyarısı) */
  --c-callout-bg: #FFF8E7; /* Soft krem/sarımtırak */
  --c-callout-border: #F3E2B8;
  --c-callout-text: #8A6517;

  /* Tipografi */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: 'Playfair Display', serif; /* Şık vurgular için eklenebilir, şimdilik modern sans kalalım */
  
  /* Ölçüler */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 9999px;
  
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-12: 4rem;
  --space-16: 6rem;
  
  --max-width: 1140px;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  margin: 0; 
  padding: 0;
  font-family: var(--font-sans);
  background-color: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--c-primary-hover); }
ul { list-style: none; padding: 0; margin: 0; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* ===== HEADER & FULLSCREEN MENU ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(252, 252, 253, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--c-border);
  height: 70px;
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.brand-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.brand-logo-icon { width: 24px; height: 24px; }

/* Menu Toggle Button */
.menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 5px;
  z-index: 1002; /* Menünün üstünde */
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--c-text);
  transition: all 0.3s ease;
}
.menu-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); background-color: var(--c-primary); }
.menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.menu-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background-color: var(--c-primary); }

/* Fullscreen Menu Overlay */
.fs-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--c-bg);
  z-index: 1001;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s;
}
.fs-menu.is-open {
  opacity: 1;
  visibility: visible;
}
.fs-menu-nav {
  text-align: center;
  transform: translateY(20px);
  transition: transform 0.4s ease;
}
.fs-menu.is-open .fs-menu-nav {
  transform: translateY(0);
}
.fs-menu-link {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--c-text);
  padding: var(--space-3) 0;
  transition: color 0.2s ease, transform 0.2s ease;
}
.fs-menu-link:hover, .fs-menu-link.active {
  color: var(--c-primary);
  transform: scale(1.05);
}
.fs-menu-footer {
  margin-top: var(--space-8);
  color: var(--c-text-muted);
  font-size: 1rem;
}
.fs-menu-footer a { color: var(--c-text); font-weight: 600; }

/* ===== HERO SECTION ===== */
.hero {
  padding: 120px 0 var(--space-12);
  background: linear-gradient(180deg, var(--c-surface) 0%, var(--c-bg) 100%);
  text-align: center;
}
.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  line-height: 1.1;
  color: var(--c-text);
}
.hero-subtitle {
  font-size: 1.25rem;
  color: var(--c-text-muted);
  max-width: 700px;
  margin: 0 auto var(--space-8);
}
.hero-image {
  max-width: 900px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(44,53,69,0.08);
  border: 1px solid var(--c-border);
}
.hero-image img { width: 100%; display: block; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-family: inherit;
}
.btn-primary { background-color: var(--c-primary); color: #fff; }
.btn-primary:hover { background-color: var(--c-primary-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 20px rgba(74,111,165,0.2); }
.btn-whatsapp { background-color: #25D366; color: #fff; }
.btn-whatsapp:hover { background-color: #1EBE5D; color: #fff; transform: translateY(-2px); box-shadow: 0 10px 20px rgba(37,211,102,0.2); }
.btn-outline { background-color: transparent; border: 2px solid var(--c-primary); color: var(--c-primary); }
.btn-outline:hover { background-color: var(--c-surface); color: var(--c-primary); }

/* ===== CONTENT SECTIONS (800-1200 words) ===== */
.section { padding: var(--space-12) 0; }
.section-alt { background-color: var(--c-surface); }
.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--space-6);
  color: var(--c-text);
}
.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}
@media(min-width: 768px) {
  .content-grid { grid-template-columns: 2fr 1fr; }
}

.article-content {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--c-text);
}
.article-content h2 { font-size: 1.75rem; margin-top: var(--space-8); margin-bottom: var(--space-4); color: var(--c-primary); }
.article-content h3 { font-size: 1.35rem; margin-top: var(--space-6); margin-bottom: var(--space-3); }
.article-content p { margin-bottom: var(--space-4); }
.article-content ul { padding-left: 1.5rem; list-style-type: disc; margin-bottom: var(--space-4); }
.article-content li { margin-bottom: var(--space-2); }

/* Callout Box (Negatif SEO / Uyarı) */
.callout {
  background-color: var(--c-callout-bg);
  border-left: 4px solid var(--c-callout-text);
  padding: var(--space-4);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--space-6) 0;
}
.callout-title { font-weight: 700; color: var(--c-callout-text); margin-bottom: var(--space-1); display: flex; align-items: center; gap: 8px;}
.callout p { color: var(--c-callout-text); margin: 0; font-size: 1rem; }

/* Contextual Links (Metin İçi Linkler) */
.ctx-link {
  color: var(--c-primary);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--c-accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}
.ctx-link:hover { background-color: rgba(74,111,165,0.1); }

/* ===== SERVICES GRID ===== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-6);
}
.service-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.service-card:hover {
  box-shadow: 0 15px 30px rgba(44,53,69,0.05);
  transform: translateY(-5px);
}
.service-icon { font-size: 2.5rem; margin-bottom: var(--space-3); }
.service-title { font-size: 1.25rem; font-weight: 700; margin-bottom: var(--space-2); }
.service-desc { color: var(--c-text-muted); font-size: 0.95rem; margin-bottom: var(--space-4); }

/* ===== FAQ ===== */
.faq-item {
  border-bottom: 1px solid var(--c-border);
  padding: var(--space-4) 0;
}
.faq-q {
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--c-text);
}
.faq-q-icon { font-size: 1.5rem; font-weight: 300; transition: transform 0.3s; color: var(--c-primary); }
.faq-item.is-open .faq-q-icon { transform: rotate(45deg); }
.faq-a {
  margin-top: var(--space-3);
  color: var(--c-text-muted);
  display: none;
  line-height: 1.7;
}
.faq-item.is-open .faq-a { display: block; }

/* ===== INTERNAL LINKS WIDGET (Footer Öncesi) ===== */
.internal-links-widget {
  background-color: var(--c-surface);
  border-top: 1px solid var(--c-border);
  padding: var(--space-8) 0;
}
.il-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}
.il-card {
  background: #fff;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.il-card a { font-weight: 600; color: var(--c-text); flex: 1;}
.il-card:hover { border-color: var(--c-primary); }
.il-card:hover a { color: var(--c-primary); }

/* ===== FOOTER ===== */
.site-footer {
  background-color: #fff;
  border-top: 1px solid var(--c-border);
  padding: var(--space-12) 0 var(--space-6);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}
@media(min-width: 768px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}
.footer-col h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: var(--space-4); }
.footer-links li { margin-bottom: var(--space-2); }
.footer-links a { color: var(--c-text-muted); }
.footer-links a:hover { color: var(--c-primary); }
.footer-bottom {
  border-top: 1px solid var(--c-border);
  padding-top: var(--space-4);
  text-align: center;
  color: var(--c-text-muted);
  font-size: 0.9rem;
}

/* WhatsApp Floating */
.wa-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: #25D366;
  color: white;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 20px rgba(37,211,102,0.3);
  z-index: 999;
  transition: transform 0.2s;
}
.wa-float:hover { transform: scale(1.1); color: white; }
.wa-float svg { width: 32px; height: 32px; fill: currentColor; }