/* ==========================================================================
   SLN DANIŞMANLIK VE MÜHENDİSLİK - DESIGN SYSTEM & STYLESHEET
   Aesthetics: Ultra-contemporary minimal engineering, pink & purple glassmorphism
   ========================================================================== */

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

:root {
  /* Color Tokens - Luxury Pink & Purple Palette */
  --bg-primary: #0d0614;
  --bg-secondary: #160b24;
  --bg-surface: #200f38;
  --bg-glass: rgba(32, 15, 56, 0.65);
  --bg-glass-hover: rgba(45, 20, 80, 0.85);
  --bg-glass-border: rgba(236, 72, 153, 0.18);

  --accent-pink: #ec4899;
  --accent-pink-hover: #db2777;
  --accent-purple: #a855f7;
  --accent-purple-hover: #9333ea;
  --accent-fuchsia: #d946ef;
  --accent-rose: #f43f5e;
  --accent-pink-light: rgba(236, 72, 153, 0.15);

  --text-main: #fcf7ff;
  --text-muted: #c0a9d4;
  --text-dim: #8b74a3;
  --border-light: rgba(236, 72, 153, 0.12);

  /* Typography */
  --font-heading: 'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;

  /* Shadows & Glows */
  --glow-pink: 0 0 30px rgba(236, 72, 153, 0.4);
  --glow-purple: 0 0 30px rgba(168, 85, 247, 0.4);
  --card-shadow: 0 10px 35px -10px rgba(0, 0, 0, 0.7);
  --backdrop-blur: blur(16px);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Background Animated Gradient Mesh - Pink & Purple Orbs */
.bg-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(130px);
  opacity: 0.38;
  animation: orbFloat 22s infinite ease-in-out alternate;
}

.bg-orb-1 {
  top: -10%;
  left: -10%;
  width: 55vw;
  height: 55vw;
  background: radial-gradient(circle, var(--accent-pink) 0%, transparent 70%);
}

.bg-orb-2 {
  bottom: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, var(--accent-purple) 0%, transparent 70%);
  animation-delay: -7s;
}

.bg-orb-3 {
  top: 40%;
  left: 30%;
  width: 45vw;
  height: 45vw;
  background: radial-gradient(circle, var(--accent-fuchsia) 0%, transparent 70%);
  animation-delay: -14s;
  opacity: 0.25;
}

@keyframes orbFloat {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(6%, 12%) scale(1.1); }
  100% { transform: translate(-6%, 6%) scale(0.95); }
}

/* Grid Overlay Background */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(236, 72, 153, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(236, 72, 153, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: -1;
  pointer-events: none;
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-main);
  line-height: 1.25;
}

.text-gradient {
  background: linear-gradient(135deg, #ffffff 0%, #f472b6 60%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-pink {
  background: linear-gradient(135deg, #f472b6 0%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-purple {
  background: linear-gradient(135deg, #c084fc 0%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  background: rgba(236, 72, 153, 0.12);
  color: var(--accent-pink);
  border: 1px solid rgba(236, 72, 153, 0.3);
}

.badge-purple {
  background: rgba(168, 85, 247, 0.15);
  color: var(--accent-purple);
  border-color: rgba(168, 85, 247, 0.35);
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px auto;
}

.section-header .subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-top: 16px;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-top: 12px;
  letter-spacing: -0.02em;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition-fast);
  border: none;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-pink) 0%, var(--accent-purple) 100%);
  color: #fff;
  box-shadow: 0 4px 25px rgba(236, 72, 153, 0.45);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 32px rgba(236, 72, 153, 0.65);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-main);
  border: 1px solid var(--bg-glass-border);
  backdrop-filter: var(--backdrop-blur);
}

.btn-secondary:hover {
  background: var(--bg-glass-hover);
  border-color: rgba(236, 72, 153, 0.4);
  transform: translateY(-2px);
}

.btn-purple {
  background: linear-gradient(135deg, var(--accent-purple) 0%, #7c3aed 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(168, 85, 247, 0.4);
}

.btn-purple:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(168, 85, 247, 0.6);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition-normal);
}

.navbar.scrolled {
  padding: 12px 0;
  background: rgba(13, 6, 20, 0.9);
  backdrop-filter: var(--backdrop-blur);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.logo-image-wrapper {
  background: transparent;
  padding: 2px 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.logo-image-wrapper:hover {
  transform: translateY(-2px) scale(1.03);
}

.brand-logo-img {
  height: 54px;
  width: auto;
  max-width: 240px;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 0 14px rgba(236, 72, 153, 0.4));
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  color: #fff;
  box-shadow: var(--glow-pink);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.logo-subtitle {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.925rem;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-main);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-pink), var(--accent-purple));
  transition: var(--transition-fast);
  border-radius: 2px;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Lang Switcher */
.lang-switch {
  display: flex;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  padding: 3px;
  border-radius: var(--radius-full);
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-fast);
}

.lang-btn.active {
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  color: #fff;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding-top: 170px;
  padding-bottom: 100px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.hero-content .hero-tag {
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  line-height: 1.15;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Hero Metrics Card */
.hero-card {
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  backdrop-filter: var(--backdrop-blur);
  box-shadow: var(--card-shadow);
  position: relative;
}

.hero-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.5), transparent 60%, rgba(168, 85, 247, 0.5));
  border-radius: var(--radius-lg);
  z-index: -1;
  opacity: 0.6;
}

.card-header-badge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}

.card-header-badge span {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--accent-pink);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-pink);
  margin-right: 6px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.stat-box {
  background: rgba(22, 11, 36, 0.7);
  border: 1px solid rgba(236, 72, 153, 0.15);
  border-radius: var(--radius-md);
  padding: 22px;
  text-align: center;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
  margin-bottom: 6px;
  background: linear-gradient(135deg, #ffffff, var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ISO Standards Section */
.iso-filter-bar {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  color: var(--text-muted);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 18px rgba(236, 72, 153, 0.4);
}

.iso-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 30px;
}

.iso-card {
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: var(--backdrop-blur);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.iso-card:hover {
  transform: translateY(-6px);
  border-color: rgba(236, 72, 153, 0.45);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.8);
}

.iso-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.iso-code {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-pink);
}

.iso-icon {
  width: 48px;
  height: 48px;
  background: rgba(236, 72, 153, 0.12);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--accent-pink);
}

.iso-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
  font-weight: 700;
}

.iso-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-grow: 1;
}

.iso-features {
  list-style: none;
  margin-bottom: 24px;
}

.iso-features li {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.iso-features li::before {
  content: '✓';
  color: var(--accent-purple);
  font-weight: 800;
}

/* Engineering Services Section */
.eng-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 30px;
}

.eng-card {
  background: linear-gradient(180deg, var(--bg-glass) 0%, rgba(22, 11, 36, 0.8) 100%);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  backdrop-filter: var(--backdrop-blur);
  position: relative;
  transition: var(--transition-normal);
}

.eng-card:hover {
  border-color: rgba(168, 85, 247, 0.45);
  transform: translateY(-4px);
}

.eng-icon-wrapper {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.2), rgba(168, 85, 247, 0.2));
  border: 1px solid rgba(236, 72, 153, 0.35);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
}

/* Process Timeline */
.process-section {
  background: rgba(22, 11, 36, 0.5);
  border-y: 1px solid var(--border-light);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 35px;
  left: 10%;
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-pink), var(--accent-purple));
  z-index: 1;
}

.step-card {
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  z-index: 2;
  text-align: center;
}

.step-number {
  width: 48px;
  height: 48px;
  background: var(--bg-primary);
  border: 2px solid var(--accent-pink);
  color: var(--accent-pink);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px auto;
}

.step-card:nth-child(even) .step-number {
  border-color: var(--accent-purple);
  color: var(--accent-purple);
}

/* Modals & Form Styling */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(13, 6, 20, 0.88);
  backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 650px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 36px;
  position: relative;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.85);
  transform: scale(0.95);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-main);
}

.form-select, .form-input, .form-textarea {
  width: 100%;
  background: rgba(13, 6, 20, 0.8);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.form-select:focus, .form-input:focus, .form-textarea:focus {
  border-color: var(--accent-pink);
  box-shadow: 0 0 15px rgba(236, 72, 153, 0.3);
}

/* Footer */
footer {
  background: #08030d;
  border-top: 1px solid var(--border-light);
  padding: 80px 0 30px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 50px;
  margin-bottom: 60px;
}

.footer-about p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 16px;
  margin-bottom: 24px;
}

.footer-title {
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-pink);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(236, 72, 153, 0.08);
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .banner-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: repeat(2, 1fr); }
  .timeline::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .hero-title { font-size: 2.5rem; }
  .section-header h2 { font-size: 2rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* Visual Showcase Banner Section */
.banner-section {
  padding: 20px 0 80px 0;
}

.banner-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.banner-card {
  position: relative;
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: var(--backdrop-blur);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  height: 260px;
}

.banner-card:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: rgba(236, 72, 153, 0.45);
  box-shadow: 0 20px 40px -15px rgba(236, 72, 153, 0.35);
}

.banner-svg-container {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
  z-index: 1;
}

.banner-svg-container svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13, 6, 20, 0.25) 0%, rgba(13, 6, 20, 0.92) 100%);
  z-index: 2;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.banner-badge {
  align-self: flex-start;
  background: rgba(13, 6, 20, 0.75);
  border: 1px solid rgba(236, 72, 153, 0.35);
  color: var(--accent-pink);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.banner-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
}

.banner-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}