/* RST Elektrik - Kurumsal Web Sitesi
   Açık tema: beyaz, açık gri, soft mavi */

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f7fa;
  --bg-soft: #eef2f7;
  --blue-soft: #5b8ba8;
  --blue-dark: #3d6b82;
  --blue-light: #7ba3bc;
  --text-primary: #2c3e50;
  --text-secondary: #5a6c7d;
  --text-muted: #8b9cad;
  --border: #e1e8ed;
  --accent-red: #c75b4a;
  --accent-orange: #d4835c;
  --shadow: 0 2px 12px rgba(59, 107, 130, 0.08);
  --shadow-hover: 0 8px 24px rgba(59, 107, 130, 0.12);
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 0.25s ease;
  --whatsapp: #25d366;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Source Sans 3', 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--blue-dark);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--blue-soft);
}

/* Header – sabit yükseklik, logo büyük kalır ama header’ı büyütmez */
/* Üst bant: telefon + Hemen ara + WhatsApp */
.header-top {
  position: relative;
  z-index: 110;
  background: var(--blue-dark);
  color: #fff;
  padding: 0.5rem 1.5rem;
}

.header-top-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.header-phone {
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.header-top-btns {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  z-index: 1;
}

.btn-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: opacity var(--transition), transform var(--transition);
  position: relative;
  z-index: 2;
  cursor: pointer;
}

.btn-top:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.btn-call {
  background: #fff;
  color: var(--blue-dark);
}

.btn-call:hover {
  color: var(--blue-dark);
}

.btn-wa {
  background: var(--whatsapp);
  color: #fff;
}

.btn-wa:hover {
  color: #fff;
}

@media (max-width: 480px) {
  .header-top { padding: 0.6rem 1rem; }
  .header-top-inner { justify-content: center; }
  .header-phone { font-size: 0.95rem; }
  .btn-top {
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
    min-height: 44px;
    min-width: 44px;
  }
}

.site-header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
  overflow: visible;
  height: 72px;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  overflow: visible;
}

.logo {
  display: block;
  height: 72px;
  position: relative;
  overflow: visible;
  min-width: 260px;
}

.logo img {
  height: 264px;
  width: auto;
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  display: block;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-desktop a {
  padding: 0.5rem 1rem;
  color: var(--text-primary);
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.nav-desktop a:hover {
  background: var(--bg-secondary);
  color: var(--blue-dark);
}

.nav-desktop a.active {
  color: var(--blue-dark);
  background: var(--bg-soft);
}

/* Header WhatsApp butonu (en başta) */
.whatsapp-header-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  background: var(--whatsapp);
  color: #fff !important;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: filter var(--transition), transform var(--transition);
}
.whatsapp-header-btn:hover {
  filter: brightness(1.08);
  color: #fff;
  transform: translateY(-1px);
}

/* Sağda sabit kayan WhatsApp butonu */
.whatsapp-float {
  position: fixed;
  right: 1.25rem;
  bottom: 1.5rem;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  padding-left: 0.85rem;
  background: var(--whatsapp);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: 50px;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.45);
  transition: transform var(--transition), box-shadow var(--transition);
}
.whatsapp-float:hover {
  color: #fff;
  transform: scale(1.05);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.5);
}
.whatsapp-float svg {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
}
@media (max-width: 480px) {
  .whatsapp-float span { display: none; }
  .whatsapp-float { padding: 0.75rem; border-radius: 50%; }
  .whatsapp-float svg { width: 28px; height: 28px; }
}

/* Mobile menu button */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1.5rem;
  line-height: 1;
}

.nav-mobile {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  padding: 1rem;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile a {
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.nav-mobile a:hover {
  background: var(--bg-secondary);
}

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--bg-secondary) 0%, var(--bg-soft) 50%, rgba(123, 163, 188, 0.15) 100%);
  padding: 3rem 1.5rem 4rem;
  text-align: center;
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  background: rgba(91, 139, 168, 0.15);
  color: var(--blue-dark);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.35rem 1rem;
  border-radius: 2rem;
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Slider */
.slider-section {
  padding: 0;
  margin: 0;
  background: var(--bg-soft);
}

.slider-wrap {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  overflow: hidden;
  border-radius: 0;
}

.slider-track {
  position: relative;
  width: 100%;
  aspect-ratio: 21/9;
  min-height: 280px;
  overflow: hidden;
}

.slider-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s ease;
  overflow: hidden;
  background: var(--bg-soft);
}

.slider-slide.active {
  opacity: 1;
  visibility: visible;
  z-index: 1;
}

.slider-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
  pointer-events: none;
}

.slider-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem 1.5rem;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 500;
}

.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  color: var(--text-primary);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background var(--transition), transform var(--transition);
}

.slider-btn:hover {
  background: #fff;
  transform: translateY(-50%) scale(1.05);
}

.slider-prev { left: 1rem; }
.slider-next { right: 1rem; }

.slider-dots {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  gap: 0.5rem;
}

.slider-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.slider-dot:hover {
  background: rgba(255,255,255,0.8);
}

.slider-dot.active {
  background: #fff;
  transform: scale(1.2);
}

@media (max-width: 768px) {
  .slider-track { aspect-ratio: 16/9; min-height: 220px; }
  .slider-btn { width: 40px; height: 40px; font-size: 1.25rem; }
  .slider-prev { left: 0.5rem; }
  .slider-next { right: 0.5rem; }
  .slider-caption { font-size: 0.85rem; padding: 0.75rem 1rem; }
}

/* Sections */
.section {
  padding: 3.5rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* Service cards (home) */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.service-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}

.service-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.service-card .icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  background: var(--bg-soft);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--blue-dark);
}

.service-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Stats (sayılar) */
.stats-section {
  padding: 2.5rem 1.5rem;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  text-align: center;
}

.stat-item {
  padding: 1rem;
}

.stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--blue-dark);
  line-height: 1.2;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
  .stat-num { font-size: 1.6rem; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
}

/* Neden biz */
.why-section {
  padding: 3.5rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.why-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.why-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--blue-light);
}

.why-card h3 {
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.why-card h3::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--blue-soft);
  border-radius: 50%;
}

.why-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Intro block (sayfa giriş metni) */
.intro-block {
  max-width: 720px;
  margin: 0 auto 2rem;
  text-align: center;
}

.intro-block p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* Hizmet detay listesi (hizmetler sayfası) */
.service-detail-list {
  list-style: none;
  margin-top: 0.75rem;
  padding-left: 0;
}

.service-detail-list li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.service-detail-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--blue-soft);
  font-weight: 700;
}

/* About: misyon / değerler */
.mission-block {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2rem;
  border-left: 4px solid var(--blue-soft);
}

.mission-block h3 {
  font-size: 1.15rem;
  color: var(--blue-dark);
  margin-bottom: 0.5rem;
}

.mission-block p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin: 0;
}

.values-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.values-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.values-list li:last-child { border-bottom: none; }

.values-list strong {
  color: var(--text-primary);
  min-width: 120px;
}

/* İletişim: bilgi kutusu */
.contact-info-box {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 2rem;
  border: 1px solid var(--border);
}

.contact-info-box h3 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.contact-info-box p {
  margin: 0.35rem 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.contact-info-box a {
  color: var(--blue-dark);
}

/* Footer zengin */
.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  text-align: left;
  padding-bottom: 1.5rem;
}

.footer-col h4 {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.95);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.footer-col p, .footer-col a {
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
}

.footer-bottom {
  text-align: center;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.15);
}

@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
}

/* CTA strip */
.cta-strip {
  background: var(--blue-dark);
  color: #fff;
  padding: 2rem 1.5rem;
  text-align: center;
}

.cta-strip h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.cta-strip p {
  opacity: 0.9;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition), transform var(--transition);
  border: none;
  cursor: pointer;
  text-align: center;
}

.btn-primary {
  background: var(--blue-soft);
  color: #fff;
}

.btn-primary:hover {
  background: var(--blue-dark);
  color: #fff;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.8);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

/* Footer */
.site-footer {
  background: var(--text-primary);
  color: rgba(255,255,255,0.85);
  padding: 2.5rem 1.5rem 1.5rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-inner a {
  color: rgba(255,255,255,0.9);
}

.footer-inner a:hover {
  color: #fff;
}

.footer-logo {
  margin-bottom: 1rem;
  display: inline-block;
  text-decoration: none;
}

.footer-logo:hover {
  opacity: 0.9;
}

.footer-logo img {
  height: 104px;
  width: auto;
  margin: 0 auto;
  display: block;
  filter: brightness(0) invert(1);
  opacity: 0.95;
}

.site-footer p {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.copyright {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.15);
  font-size: 0.85rem;
  opacity: 0.8;
}

/* Page header (inner pages) */
.page-header {
  background: linear-gradient(160deg, var(--bg-secondary) 0%, var(--bg-soft) 100%);
  padding: 2rem 1.5rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

.page-header p {
  color: var(--text-secondary);
  margin-top: 0.35rem;
}

/* Services page list */
.service-list {
  list-style: none;
}

.service-list li {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  margin-bottom: 1rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  align-items: start;
  transition: box-shadow var(--transition);
}

.service-list li:hover {
  box-shadow: var(--shadow);
}

.service-list .icon {
  width: 48px;
  height: 48px;
  background: var(--bg-soft);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--blue-dark);
}

.service-list h3 {
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.service-list p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* About page */
.about-content {
  max-width: 720px;
  margin: 0 auto;
}

.about-content p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

.about-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.about-feature {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}

.about-feature strong {
  display: block;
  color: var(--blue-dark);
  margin-bottom: 0.35rem;
}

.about-feature span {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Contact page */
.contact-wrap {
  max-width: 720px;
  margin: 0 auto;
  display: grid;
  gap: 2rem;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.contact-actions a,
.contact-actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font: inherit;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue-soft);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .nav-mobile {
    display: none;
  }

  .nav-mobile.open {
    display: flex;
  }

  .service-list li {
    grid-template-columns: 1fr;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    padding: 2rem 1rem 3rem;
  }

  .section {
    padding: 2.5rem 1rem;
  }
}

@media (max-width: 480px) {
  .site-header {
    height: 64px;
  }

  .header-inner {
    padding: 0 1rem;
    height: 64px;
  }

  .logo {
    height: 64px;
  }

  .logo img {
    height: 228px;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }
}