/* ═══════════════════════════════════════════════════════
   YETER SİHHİ TESİSAT — style.css
   ═══════════════════════════════════════════════════════ */

/* ─── VARIABLES ─── */
:root {
  --blue-900: #0a1628;
  --blue-800: #0f2140;
  --blue-700: #133266;
  --blue-600: #1a4b8c;
  --blue-500: #2563eb;
  --blue-400: #4a8af5;
  --blue-300: #7db0fc;
  --blue-200: #b8d4fe;
  --blue-100: #dbeafe;
  --blue-50:  #eff6ff;
  --white:    #ffffff;
  --gray-50:  #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-500: #64748b;
  --gray-700: #334155;
  --accent:      #10b981;
  --accent-dark: #059669;
  --whatsapp:      #25d366;
  --whatsapp-dark: #1ebe57;
  --shadow-sm: 0 1px 3px rgba(10,22,40,.08);
  --shadow-md: 0 4px 16px rgba(10,22,40,.1);
  --shadow-lg: 0 12px 40px rgba(10,22,40,.15);
  --shadow-xl: 0 20px 60px rgba(10,22,40,.2);
}

/* ─── RESET ─── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'DM Sans', sans-serif;
  color: var(--blue-900);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; }

/* ─── ANIMATIONS ─── */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}
@keyframes pulse-wa {
  0%, 100% { box-shadow: 0 4px 20px rgba(37,211,102,.45); }
  50%      { box-shadow: 0 4px 30px rgba(37,211,102,.65); }
}
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── SHARED ─── */
.section-label {
  text-align: center;
  font-weight: 700;
  font-size: .85rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--blue-500);
  margin-bottom: 12px;
}
.section-title {
  text-align: center;
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: 3px;
  color: var(--blue-900);
  margin-bottom: 48px;
}

/* ════════════════════════════════════════════════════════
   TOP BAR
   ════════════════════════════════════════════════════════ */
.top-bar {
  background: var(--blue-900);
  color: var(--white);
  padding: 10px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}
.top-bar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.top-bar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}
.top-bar .phone-link {
  color: var(--white);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .5px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color .2s;
}
.top-bar .phone-link:hover { color: var(--blue-300); }
.top-bar .phone-link svg { flex-shrink: 0; }

.whatsapp-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--whatsapp);
  color: var(--white);
  padding: 7px 18px;
  border-radius: 50px;
  font-weight: 600;
  font-size: .9rem;
  transition: background .2s, transform .15s;
}
.whatsapp-btn:hover { background: var(--whatsapp-dark); transform: translateY(-1px); }
.whatsapp-btn svg { flex-shrink: 0; }

.top-bar-site {
  font-size: .85rem;
  color: var(--blue-300);
  letter-spacing: .3px;
}

/* ════════════════════════════════════════════════════════
   HERO
   ════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  background: linear-gradient(165deg, var(--blue-900) 0%, var(--blue-700) 50%, var(--blue-500) 100%);
  color: var(--white);
  padding: 80px 24px 90px;
  text-align: center;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(37,99,235,.4) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(16,185,129,.15) 0%, transparent 40%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0; right: 0;
  height: 80px;
  background: var(--white);
  clip-path: ellipse(55% 100% at 50% 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
}
.hero-icon {
  width: 64px; height: 64px;
  margin: 0 auto 20px;
  background: rgba(255,255,255,.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: float 3s ease-in-out infinite;
}
.hero h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(3rem, 8vw, 5.5rem);
  letter-spacing: 6px;
  line-height: 1;
  margin-bottom: 16px;
  text-shadow: 0 4px 20px rgba(0,0,0,.25);
}
.hero-slogan {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 600;
  letter-spacing: 6px;
  text-transform: uppercase;
  color: var(--blue-200);
  margin-bottom: 32px;
}
.hero-desc {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--blue-100);
  max-width: 560px;
  margin: 0 auto 36px;
}
.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ─── BUTTONS ─── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--white);
  color: var(--blue-700);
  padding: 16px 36px;
  border-radius: 60px;
  font-weight: 700;
  font-size: 1.05rem;
  transition: all .25s;
  box-shadow: var(--shadow-lg);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  background: var(--blue-50);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--whatsapp);
  color: var(--white);
  padding: 16px 36px;
  border-radius: 60px;
  font-weight: 700;
  font-size: 1.05rem;
  transition: all .25s;
  box-shadow: 0 4px 20px rgba(37,211,102,.35);
}
.btn-secondary:hover {
  background: var(--whatsapp-dark);
  transform: translateY(-2px);
}

/* ════════════════════════════════════════════════════════
   SERVICES
   ════════════════════════════════════════════════════════ */
.services {
  padding: 80px 24px;
  max-width: 1100px;
  margin: 0 auto;
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}
.service-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  padding: 36px 28px;
  text-align: center;
  transition: all .3s;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue-500), var(--blue-300));
  transform: scaleX(0);
  transition: transform .3s;
}
.service-card:hover {
  border-color: var(--blue-300);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 68px; height: 68px;
  margin: 0 auto 20px;
  background: var(--blue-50);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .3s;
}
.service-card:hover .service-icon { background: var(--blue-100); }
.service-icon svg { color: var(--blue-500); }
.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--blue-900);
}
.service-card p {
  font-size: .92rem;
  line-height: 1.6;
  color: var(--gray-500);
}

/* ════════════════════════════════════════════════════════
   CTA BAND
   ════════════════════════════════════════════════════════ */
.cta-band {
  background: linear-gradient(135deg, var(--blue-700), var(--blue-500));
  padding: 56px 24px;
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 50%, rgba(255,255,255,.08) 0%, transparent 60%);
}
.cta-band-inner {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}
.cta-band h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: 3px;
  margin-bottom: 12px;
}
.cta-band p {
  font-size: 1.05rem;
  color: var(--blue-200);
  margin-bottom: 28px;
}
.cta-band .btn-primary {
  font-size: 1.15rem;
  padding: 18px 44px;
}

/* ════════════════════════════════════════════════════════
   ABOUT
   ════════════════════════════════════════════════════════ */
.about {
  padding: 80px 24px;
  max-width: 1100px;
  margin: 0 auto;
}
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.about-text h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: 2px;
  color: var(--blue-900);
  margin-bottom: 8px;
}
.about-text .about-motto {
  font-weight: 700;
  font-size: .95rem;
  color: var(--blue-500);
  margin-bottom: 20px;
  font-style: italic;
}
.about-text p {
  font-size: .98rem;
  line-height: 1.8;
  color: var(--gray-700);
  margin-bottom: 14px;
}
.about-img {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  background: var(--blue-50);
}
.about-img img {
  width: 100%; height: auto;
  object-fit: contain;
}
.about-img::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  border: 2px solid rgba(37,99,235,.1);
  pointer-events: none;
}

/* ════════════════════════════════════════════════════════
   WHY US
   ════════════════════════════════════════════════════════ */
.why-us {
  padding: 80px 24px;
  background: var(--blue-50);
}
.why-us-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}
.why-card {
  background: var(--white);
  border-radius: 18px;
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--gray-200);
  transition: all .3s;
}
.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-300);
}
.why-icon {
  width: 56px; height: 56px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-400));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
}
.why-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--blue-900);
  margin-bottom: 8px;
}
.why-card p {
  font-size: .9rem;
  line-height: 1.6;
  color: var(--gray-500);
}

/* ════════════════════════════════════════════════════════
   TESTIMONIALS
   ════════════════════════════════════════════════════════ */
.testimonials {
  padding: 80px 24px;
  max-width: 1100px;
  margin: 0 auto;
}
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.testimonial-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  padding: 32px 28px;
  position: relative;
  transition: all .3s;
}
.testimonial-card:hover {
  border-color: var(--blue-200);
  box-shadow: var(--shadow-md);
}
.testimonial-card .stars {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}
.testimonial-card .quote {
  font-size: .95rem;
  line-height: 1.7;
  color: var(--gray-700);
  margin-bottom: 18px;
  font-style: italic;
}
.testimonial-card .author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.author-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--blue-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--blue-600);
  font-size: .95rem;
  flex-shrink: 0;
}
.author-info .name {
  font-weight: 700;
  font-size: .9rem;
  color: var(--blue-900);
}
.author-info .location {
  font-size: .8rem;
  color: var(--gray-500);
}

/* ════════════════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════════════════ */
footer {
  background: var(--blue-900);
  color: var(--blue-200);
  padding: 48px 24px 28px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 36px;
  margin-bottom: 36px;
}
.footer-brand h3 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.6rem;
  letter-spacing: 3px;
  color: var(--white);
  margin-bottom: 10px;
}
.footer-brand p {
  font-size: .9rem;
  line-height: 1.7;
  color: var(--blue-300);
}
.footer-contact h4,
.footer-social h4 {
  font-weight: 700;
  color: var(--white);
  margin-bottom: 14px;
  font-size: .95rem;
}
.footer-contact a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--blue-200);
  font-size: .95rem;
  margin-bottom: 12px;
  transition: color .2s;
}
.footer-contact a:hover { color: var(--white); }

.social-icons {
  display: flex;
  gap: 12px;
}
.social-icon {
  width: 42px; height: 42px;
  border-radius: 12px;
  background: rgba(255,255,255,.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-200);
  transition: all .2s;
}
.social-icon:hover {
  background: var(--blue-500);
  color: var(--white);
  transform: translateY(-2px);
}
.footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .85rem;
  color: var(--gray-500);
}
.footer-bottom a {
  color: var(--blue-300);
  font-weight: 600;
}
.footer-bottom a:hover { color: var(--white); }

/* ════════════════════════════════════════════════════════
   FLOATING WHATSAPP
   ════════════════════════════════════════════════════════ */
.floating-wa {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 999;
  width: 60px; height: 60px;
  background: var(--whatsapp);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  box-shadow: 0 4px 20px rgba(37,211,102,.45);
  transition: transform .2s, box-shadow .2s;
  animation: pulse-wa 2s ease-in-out infinite;
}
.floating-wa:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(37,211,102,.55);
}

/* ════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .about-inner {
    grid-template-columns: 1fr;
  }
  .about-img { order: -1; }
}

@media (max-width: 640px) {
  .top-bar-inner { justify-content: center; text-align: center; }
  .top-bar-site  { display: none; }

  .hero { padding: 60px 20px 70px; }
  .hero h1 { letter-spacing: 3px; }
  .hero-slogan { letter-spacing: 3px; font-size: .9rem; }
  .hero-cta { flex-direction: column; align-items: center; }
  .btn-primary,
  .btn-secondary { width: 100%; max-width: 300px; justify-content: center; }

  .services { padding: 60px 20px; }
  .services-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }

  .footer-inner { text-align: center; }
  .footer-contact a { justify-content: center; }
  .social-icons { justify-content: center; }
  .footer-bottom { justify-content: center; text-align: center; }

  .floating-wa { width: 54px; height: 54px; bottom: 18px; right: 18px; }
}