/* ============================================================
   ERC BİOTEKNOLOJİ - Ana CSS
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Raleway:wght@300;400;500;600;700;800&family=Source+Sans+3:wght@300;400;500;600;700&display=swap');

/* ---- CSS Değişkenleri ---- */
:root {
  --navy:    #0d2b5e;
  --navy-dk: #081a3a;
  --red:     #c0392b;
  --red-lt:  #e74c3c;
  --blue:    #2471a3;
  --blue-lt: #2980b9;
  --silver:  #bdc3c7;
  --light:   #f4f6f8;
  --white:   #ffffff;
  --text:    #2c3e50;
  --text-lt: #5d6d7e;
  --border:  #dce3ea;
  --shadow:  0 4px 24px rgba(13,43,94,0.10);
  --shadow-md: 0 8px 40px rgba(13,43,94,0.14);
  --radius:  6px;
  --radius-lg: 12px;
  --transition: 0.3s ease;
  --font-head: 'Raleway', sans-serif;
  --font-body: 'Source Sans 3', sans-serif;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- Yardımcı Sınıflar ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-pad { padding: 80px 0; }
.section-pad-sm { padding: 56px 0; }
.text-center { text-align: center; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }

/* ============================================================
   HEADER & NAV
   ============================================================ */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--navy-dk);
  box-shadow: 0 2px 16px rgba(0,0,0,0.22);
  transition: var(--transition);
}
#site-header.scrolled {
  background: rgba(8,26,58,0.97);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.site-logo img.logo-icon {
  height: 50px;
  width: auto;
}
.site-logo .logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.site-logo .logo-text span:first-child {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--white);
  letter-spacing: 2px;
}
.site-logo .logo-text span:last-child {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 0.65rem;
  color: var(--silver);
  letter-spacing: 3px;
  text-transform: uppercase;
}

/* Nav */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav > li { position: relative; }
.main-nav > li > a {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 8px 14px;
  font-family: var(--font-head);
  font-size: 0.82rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.8px;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav > li > a:hover,
.main-nav > li > a.active {
  color: var(--white);
  background: rgba(255,255,255,0.1);
}
.main-nav > li > a .arrow {
  font-size: 0.65rem;
  transition: transform 0.25s;
}
.main-nav > li:hover > a .arrow { transform: rotate(180deg); }

/* Dropdown */
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  border-top: 3px solid var(--red);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.22s ease;
  z-index: 200;
}
.main-nav > li:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown li a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
  border-bottom: 1px solid var(--border);
}
.dropdown li:last-child a { border-bottom: none; }
.dropdown li a:hover { background: var(--light); color: var(--navy); padding-left: 24px; }
.dropdown li a .dot {
  width: 6px; height: 6px;
  background: var(--red);
  border-radius: 50%;
  flex-shrink: 0;
}

/* Header CTA */
.header-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}
.header-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.75);
  font-size: 0.82rem;
  font-weight: 500;
}
.header-phone .ph-icon {
  width: 30px; height: 30px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
}
.btn-contact {
  padding: 9px 20px;
  background: var(--red);
  color: var(--white);
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: var(--transition);
}
.btn-contact:hover { background: var(--red-lt); transform: translateY(-1px); }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--navy-dk) 0%, var(--navy) 50%, #1a3a6e 100%);
  overflow: hidden;
  padding-top: 72px;
}
.hero-bg-pattern {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse at 70% 50%, rgba(36,113,163,0.18) 0%, transparent 60%),
    radial-gradient(ellipse at 20% 80%, rgba(192,57,43,0.10) 0%, transparent 50%);
}
.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
  padding: 80px 0;
}
.hero-text { color: var(--white); }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(192,57,43,0.2);
  border: 1px solid rgba(192,57,43,0.4);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #f1948a;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero-badge .badge-dot {
  width: 6px; height: 6px;
  background: var(--red-lt);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}
.hero-title {
  font-family: var(--font-head);
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
}
.hero-title .accent { color: #5dade2; }
.hero-title .accent-red { color: #f1948a; }
.hero-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.72);
  margin-bottom: 36px;
  max-width: 480px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  padding: 14px 32px;
  background: var(--red);
  color: var(--white);
  font-family: var(--font-head);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: all 0.3s;
  box-shadow: 0 4px 16px rgba(192,57,43,0.4);
}
.btn-primary:hover { background: var(--red-lt); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(192,57,43,0.5); }
.btn-outline {
  padding: 14px 32px;
  background: transparent;
  color: var(--white);
  font-family: var(--font-head);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: var(--radius);
  border: 2px solid rgba(255,255,255,0.35);
  transition: var(--transition);
}
.btn-outline:hover { border-color: var(--white); background: rgba(255,255,255,0.08); }

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.hero-stat-item .num {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}
.hero-stat-item .num span { color: var(--red-lt); }
.hero-stat-item .lbl {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.5px;
  margin-top: 4px;
}

/* Hero Visual */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-logo-wrap {
  position: relative;
  width: 300px;
  height: 300px;
  background: white;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 0 0 6px rgba(255,255,255,0.12), 0 0 60px rgba(36,113,163,0.45), 0 0 120px rgba(36,113,163,0.2);
  padding: 0;
}
.hero-logo-wrap::before {
  content: '';
  position: absolute;
  inset: -24px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(36,113,163,0.18) 0%, transparent 70%);
  animation: glow 4s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
}
@keyframes glow {
  0%,100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.9; }
}
.hero-logo-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  animation: float 6s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}
.hero-orbit {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.08);
  animation: spin 20s linear infinite;
}
.hero-orbit-1 { inset: -40px; animation-duration: 25s; }
.hero-orbit-2 { inset: -80px; animation-duration: 40s; animation-direction: reverse; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.4);
  font-size: 0.7rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  animation: bounce 2.5s ease-in-out infinite;
}
.scroll-indicator .scroll-arrow { font-size: 1.1rem; }
@keyframes bounce {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ============================================================
   SECTION HEADINGS
   ============================================================ */
.section-header { margin-bottom: 52px; }
.section-header.text-center { text-align: center; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 12px;
}
.section-tag::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--red);
  border-radius: 2px;
}
.section-title {
  font-family: var(--font-head);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--navy-dk);
  line-height: 1.25;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1rem;
  color: var(--text-lt);
  max-width: 560px;
  line-height: 1.8;
}
.section-header.text-center .section-desc { margin: 0 auto; }
.title-line {
  display: block;
  width: 48px; height: 4px;
  background: linear-gradient(90deg, var(--red), var(--blue));
  border-radius: 2px;
  margin-top: 16px;
}
.text-center .title-line { margin: 16px auto 0; }

/* ============================================================
   HIZMETLER (Services)
   ============================================================ */
#hizmetler { background: var(--light); }
.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--navy), var(--blue));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.service-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--navy), var(--blue));
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 22px;
  color: var(--white);
}
.service-card h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy-dk);
  margin-bottom: 12px;
}
.service-card p {
  font-size: 0.9rem;
  color: var(--text-lt);
  line-height: 1.75;
}
.service-card .read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--blue);
  letter-spacing: 0.5px;
  transition: var(--transition);
}
.service-card .read-more:hover { gap: 10px; color: var(--navy); }

/* ============================================================
   HAKKIMIZDA (About)
   ============================================================ */
#hakkimizda { background: var(--white); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.about-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.about-logo-display {
  background: linear-gradient(135deg, var(--navy-dk), var(--navy));
  border-radius: var(--radius-lg);
  padding: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 360px;
  position: relative;
  overflow: hidden;
}
.about-logo-display::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(36,113,163,0.2) 0%, transparent 70%);
}
.about-logo-display img { position: relative; z-index: 1; max-width: 260px; }
.about-badge-float {
  position: absolute;
  bottom: -18px;
  right: -18px;
  background: var(--red);
  color: var(--white);
  padding: 18px 22px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
}
.about-badge-float .big-num {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  display: block;
}
.about-badge-float .small-txt {
  font-size: 0.72rem;
  opacity: 0.85;
  margin-top: 4px;
}

.about-text .section-header { margin-bottom: 28px; }
.about-text p {
  font-size: 0.97rem;
  color: var(--text-lt);
  line-height: 1.85;
  margin-bottom: 16px;
}
.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 28px 0;
}
.about-feat-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.about-feat-item .feat-icon {
  width: 36px; height: 36px;
  background: var(--light);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  color: var(--navy);
}
.about-feat-item .feat-text { font-size: 0.88rem; font-weight: 600; color: var(--text); line-height: 1.4; padding-top: 8px; }

/* ============================================================
   ÜRÜNLER (Products)
   ============================================================ */
#urunler { background: var(--light); }
.product-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}
.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}
.product-card-header {
  padding: 32px;
  background: linear-gradient(135deg, var(--navy-dk), var(--navy));
  text-align: center;
  position: relative;
  overflow: hidden;
}
.product-card-header::before {
  content: '';
  position: absolute;
  top: -20px; right: -20px;
  width: 80px; height: 80px;
  border: 2px solid rgba(255,255,255,0.08);
  border-radius: 50%;
}
.product-card-header .prod-icon {
  font-size: 2.8rem;
  margin-bottom: 8px;
}
.product-card-header h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}
.product-card-header .prod-category {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 1px;
  margin-top: 4px;
}
.product-card-body {
  padding: 24px 28px;
}
.product-card-body p {
  font-size: 0.88rem;
  color: var(--text-lt);
  line-height: 1.7;
  margin-bottom: 16px;
}
.prod-tag {
  display: inline-block;
  padding: 4px 10px;
  background: var(--light);
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--navy);
  margin: 2px;
  letter-spacing: 0.5px;
}

/* ============================================================
   VIZYON MİSYON
   ============================================================ */
#vizyon {
  background: linear-gradient(135deg, var(--navy-dk), var(--navy));
  color: var(--white);
}
.vizyon-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.vizyon-item {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: var(--transition);
}
.vizyon-item:hover {
  background: rgba(255,255,255,0.10);
  transform: translateY(-4px);
}
.vizyon-item .viz-icon {
  font-size: 2.2rem;
  margin-bottom: 18px;
}
.vizyon-item h3 {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--white);
}
.vizyon-item p {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.85;
}

/* ============================================================
   RAKAMLAR (Stats Counter)
   ============================================================ */
#rakamlar { background: var(--white); }
.stats-row {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat-item {
  padding: 40px 24px;
  text-align: center;
  border-right: 1px solid var(--border);
  transition: var(--transition);
}
.stat-item:last-child { border-right: none; }
.stat-item:hover { background: var(--light); }
.stat-item .stat-num {
  font-family: var(--font-head);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-item .stat-num span { color: var(--red); }
.stat-item .stat-lbl {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-lt);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* ============================================================
   COZUM ORTAKLARI
   ============================================================ */
#ortaklar { background: var(--light); }
.ortak-grid {
  display: grid;
  grid-template-columns: repeat(5,1fr);
  gap: 20px;
}
.ortak-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.ortak-card:hover { border-color: var(--blue); transform: translateY(-3px); box-shadow: var(--shadow); }
.ortak-card .ortak-icon {
  font-size: 2rem;
  width: 56px; height: 56px;
  background: var(--light);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
}
.ortak-card span {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-lt);
  text-align: center;
}

/* ============================================================
   İLETİŞİM (Contact)
   ============================================================ */
#iletisim { background: var(--white); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 56px;
  align-items: start;
}
.contact-info h3 {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--navy-dk);
  margin-bottom: 24px;
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}
.contact-item .ci-icon {
  width: 44px; height: 44px;
  background: var(--light);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  color: var(--navy);
}
.contact-item .ci-text .ci-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-lt);
  margin-bottom: 4px;
}
.contact-item .ci-text .ci-value {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 500;
}
.contact-item .ci-text .ci-value a:hover { color: var(--red); }

/* Form */
.contact-form {
  background: var(--light);
  border-radius: var(--radius-lg);
  padding: 40px;
}
.contact-form h3 {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--navy-dk);
  margin-bottom: 28px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 7px;
  letter-spacing: 0.3px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 11px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text);
  background: var(--white);
  transition: var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(36,113,163,0.12);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.btn-submit {
  width: 100%;
  padding: 14px;
  background: var(--navy);
  color: var(--white);
  font-family: var(--font-head);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: all 0.3s;
  cursor: pointer;
  border: none;
}
.btn-submit:hover { background: var(--blue); transform: translateY(-2px); }

/* ============================================================
   FOOTER
   ============================================================ */
#footer {
  background: var(--navy-dk);
  color: rgba(255,255,255,0.65);
  padding-top: 64px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.footer-brand .logo-wrap img { height: 44px; width: auto; }
.footer-brand .brand-name {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 2px;
}
.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.8;
  margin-bottom: 22px;
  max-width: 280px;
}
.social-links { display: flex; gap: 10px; }
.social-link {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  transition: var(--transition);
  color: rgba(255,255,255,0.65);
}
.social-link:hover { background: var(--red); color: var(--white); }

.footer-col h4 {
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-col ul li { margin-bottom: 9px; }
.footer-col ul li a {
  font-size: 0.85rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 7px;
}
.footer-col ul li a::before {
  content: '›';
  color: var(--red);
  font-size: 1rem;
  line-height: 1;
}
.footer-col ul li a:hover { color: var(--white); padding-left: 4px; }

.footer-bottom {
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
}
.footer-bottom a { color: rgba(255,255,255,0.4); transition: var(--transition); }
.footer-bottom a:hover { color: var(--white); }

/* ============================================================
   PAGE HEADER (iç sayfalar)
   ============================================================ */
.page-header {
  background: linear-gradient(135deg, var(--navy-dk), var(--navy));
  padding: 100px 0 56px;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin-top: 72px;
}
.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 50px 50px;
}
.page-header h1 {
  position: relative;
  font-family: var(--font-head);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 12px;
}
.page-header .breadcrumb {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
}
.page-header .breadcrumb a { color: rgba(255,255,255,0.65); transition: var(--transition); }
.page-header .breadcrumb a:hover { color: var(--white); }
.page-header .breadcrumb .sep { font-size: 0.7rem; }

/* ============================================================
   ANİMASYONLAR
   ============================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-up:nth-child(1) { transition-delay: 0.0s; }
.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }

/* ============================================================
   MOBILE NAV PANEL
   ============================================================ */
.mobile-nav {
  display: none;
  position: fixed;
  top: 72px;
  left: 0; right: 0;
  background: var(--navy-dk);
  z-index: 999;
  border-top: 1px solid rgba(255,255,255,0.1);
  max-height: calc(100vh - 72px);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.3s ease;
}
.mobile-nav.open {
  transform: translateX(0);
}
.mobile-nav ul { padding: 16px 0; }
.mobile-nav li a {
  display: block;
  padding: 13px 24px;
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  font-weight: 500;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: var(--transition);
}
.mobile-nav li a:hover { background: rgba(255,255,255,0.07); color: var(--white); padding-left: 32px; }
.mobile-nav li.sub-item a { padding-left: 40px; font-size: 0.82rem; color: rgba(255,255,255,0.6); }
.mobile-nav .mob-section-head {
  padding: 10px 24px;
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  font-weight: 600;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1100px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .hero-title { font-size: 2.6rem; }
  .stats-row { grid-template-columns: repeat(2,1fr); }
  .stats-row .stat-item:nth-child(2) { border-right: none; }
  .stats-row .stat-item:nth-child(3) { border-top: 1px solid var(--border); }
  .ortak-grid { grid-template-columns: repeat(3,1fr); }
}

@media (max-width: 900px) {
  .main-nav, .header-phone, .btn-contact, .header-cta { display: none; }
  .hamburger { display: flex; margin-left: auto; }
  .mobile-nav { display: block; }
  .hero-content { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-text { order: 2; }
  .hero-visual { order: 1; }
  .hero-logo-wrap { width: 220px; height: 220px; }
  .hero-desc { margin: 0 auto 36px; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .vizyon-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: repeat(2,1fr); }
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .hero-title { font-size: 2.2rem; }
}

@media (max-width: 600px) {
  .section-title { font-size: 1.75rem; }
  .hero-title { font-size: 1.85rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr; }
  .stats-row .stat-item { border-right: none; border-bottom: 1px solid var(--border); }
  .ortak-grid { grid-template-columns: repeat(2,1fr); }
  .about-features { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .contact-form { padding: 28px 20px; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
}

/* ---- Footer Credit ---- */
.footer-credit {
  padding: 12px 0;
  text-align: center;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.3);
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top: 8px;
}
.footer-credit a {
  color: rgba(255,255,255,0.5);
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: color 0.2s;
}
.footer-credit a:hover { color: var(--white); }

/* ---- WhatsApp Float Button ---- */
.wa-float {
  position: fixed;
  bottom: 88px;
  right: 28px;
  width: 52px;
  height: 52px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37,211,102,0.45);
  z-index: 500;
  transition: all 0.3s;
  text-decoration: none;
}
.wa-float:hover { transform: scale(1.1); box-shadow: 0 6px 28px rgba(37,211,102,0.6); }
.wa-float svg { width: 28px; height: 28px; fill: white; }

/* ---- Dil Seçici ---- */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 12px;
  flex-shrink: 0;
}
.lang-btn {
  padding: 4px 9px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: rgba(255,255,255,0.55);
  border-radius: 4px;
  border: 1px solid rgba(255,255,255,0.15);
  transition: all 0.2s;
  text-transform: uppercase;
  line-height: 1;
}
.lang-btn:hover { color: white; border-color: rgba(255,255,255,0.4); background: rgba(255,255,255,0.07); }
.lang-btn.active { color: white; background: var(--red); border-color: var(--red); }