/* ========================================
   MERTSAR MÜHENDİSLİK - Corporate Website
   Design System & Styles
   ======================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Outfit:wght@400;500;600;700;800&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Primary Palette - Deep Navy & Steel */
  --primary-900: #0a1628;
  --primary-800: #0f2240;
  --primary-700: #142e58;
  --primary-600: #1a3a6e;
  --primary-500: #1e4d8c;
  --primary-400: #2a6bc4;
  --primary-300: #4a8ee0;
  --primary-200: #7cb3f0;
  --primary-100: #b8d8fa;
  --primary-50: #e8f2ff;

  /* Accent - Warm Orange/Amber */
  --accent-600: #c45e10;
  --accent-500: #e67e22;
  --accent-400: #f39c3a;
  --accent-300: #f5b565;
  --accent-200: #f9d29d;
  --accent-100: #fde8c8;

  /* Neutrals */
  --neutral-950: #06080c;
  --neutral-900: #0c1018;
  --neutral-800: #161c2a;
  --neutral-700: #232b3d;
  --neutral-600: #3a4560;
  --neutral-500: #566380;
  --neutral-400: #7a8aa6;
  --neutral-300: #a0aec0;
  --neutral-200: #c8d2e0;
  --neutral-100: #e4e9f0;
  --neutral-50: #f4f6f9;

  /* Semantic */
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-700) 50%, var(--primary-600) 100%);
  --gradient-card: linear-gradient(145deg, rgba(20, 46, 88, 0.4) 0%, rgba(10, 22, 40, 0.6) 100%);
  --gradient-accent: linear-gradient(135deg, var(--accent-500) 0%, var(--accent-400) 100%);
  --gradient-text: linear-gradient(135deg, var(--primary-200) 0%, var(--accent-400) 100%);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 16px 60px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(230, 126, 34, 0.2);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.175, 0.885, 0.32, 1.275);

  /* Layout */
  --container-max: 1200px;
  --nav-height: 110px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  color: var(--neutral-200);
  background-color: var(--neutral-950);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--neutral-50);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

p {
  color: var(--neutral-300);
  font-size: 1rem;
  line-height: 1.8;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent-400);
  margin-bottom: var(--space-lg);
}

.section-label::before {
  content: '';
  width: 30px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
}

.section-title {
  margin-bottom: var(--space-lg);
}

.section-desc {
  max-width: 600px;
  font-size: 1.05rem;
  color: var(--neutral-400);
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--primary-900);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(230, 126, 34, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  background: transparent;
  color: var(--neutral-100);
  border: 1.5px solid var(--neutral-600);
}

.btn-outline:hover {
  border-color: var(--accent-400);
  color: var(--accent-400);
  transform: translateY(-2px);
}

.btn-icon {
  font-size: 1.1rem;
  transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
  transform: translateX(3px);
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(6, 8, 12, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: var(--shadow-md);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo-brand,
.footer-logo-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.site-logo-img {
  height: 95px;
  width: auto;
  object-fit: contain;
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.site-logo-img:hover {
  transform: scale(1.03);
  filter: drop-shadow(0 0 10px rgba(230, 126, 34, 0.4));
}

.footer-logo-img {
  height: 110px;
  width: auto;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--neutral-300);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--neutral-50);
}

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

.nav-cta {
  padding: 10px 24px;
  font-size: 0.85rem;
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-sm);
  z-index: 1001;
}

.nav-hamburger span {
  width: 24px;
  height: 2px;
  background: var(--neutral-100);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(6, 8, 12, 0.4) 0%,
    rgba(6, 8, 12, 0.6) 40%,
    rgba(6, 8, 12, 0.95) 100%
  );
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent-400);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat 8s infinite;
}

@keyframes particleFloat {
  0% { opacity: 0; transform: translateY(100vh) scale(0); }
  20% { opacity: 0.6; }
  80% { opacity: 0.3; }
  100% { opacity: 0; transform: translateY(-20vh) scale(1); }
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-content {
  max-width: 700px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 20px;
  background: rgba(230, 126, 34, 0.1);
  border: 1px solid rgba(230, 126, 34, 0.25);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-400);
  margin-bottom: var(--space-2xl);
  animation: fadeSlideUp 0.8s ease-out;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent-400);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800;
  margin-bottom: var(--space-xl);
  animation: fadeSlideUp 0.8s ease-out 0.1s both;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--neutral-300);
  margin-bottom: var(--space-2xl);
  max-width: 560px;
  animation: fadeSlideUp 0.8s ease-out 0.2s both;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  animation: fadeSlideUp 0.8s ease-out 0.3s both;
}

.hero-stats {
  display: flex;
  gap: var(--space-3xl);
  margin-top: var(--space-4xl);
  animation: fadeSlideUp 0.8s ease-out 0.4s both;
}

.hero-stat {
  position: relative;
}

.hero-stat::after {
  content: '';
  position: absolute;
  right: calc(var(--space-3xl) / -2);
  top: 0;
  height: 100%;
  width: 1px;
  background: var(--neutral-700);
}

.hero-stat:last-child::after {
  display: none;
}

.hero-stat-value {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--neutral-50);
  line-height: 1;
}

.hero-stat-value .accent {
  color: var(--accent-400);
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--neutral-500);
  margin-top: var(--space-xs);
}

/* --- Scroll Indicator --- */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--neutral-500);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: fadeSlideUp 0.8s ease-out 0.5s both;
}

.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--neutral-600);
  border-radius: 12px;
  position: relative;
}

.scroll-mouse::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 8px;
  background: var(--accent-400);
  border-radius: var(--radius-full);
  animation: scrollWheel 2s infinite;
}

@keyframes scrollWheel {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* --- Sections Common --- */
.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-4xl);
}

.section-header .section-desc {
  margin: 0 auto;
}

/* --- About Section --- */
.about {
  background: var(--neutral-900);
  overflow: hidden;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.about-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  transition: transform var(--transition-slow);
}

.about-image:hover img {
  transform: scale(1.03);
}

.about-image-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-xl);
  background: linear-gradient(transparent, rgba(6, 8, 12, 0.9));
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.about-experience {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-400);
  line-height: 1;
}

.about-experience-text {
  font-size: 0.9rem;
  color: var(--neutral-300);
  line-height: 1.3;
}

.about-content .section-label {
  text-align: left;
}

.about-content .section-title {
  text-align: left;
}

.about-text {
  margin-bottom: var(--space-2xl);
}

/* Vision & Mission Cards */
.vm-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.vm-card {
  padding: var(--space-xl);
  background: var(--gradient-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.vm-card:hover {
  border-color: rgba(230, 126, 34, 0.2);
  transform: translateX(5px);
  box-shadow: var(--shadow-md);
}

.vm-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.vm-card-icon {
  width: 44px;
  height: 44px;
  background: rgba(230, 126, 34, 0.1);
  border: 1px solid rgba(230, 126, 34, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.vm-card-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--neutral-50);
}

.vm-card p {
  font-size: 0.92rem;
  color: var(--neutral-400);
}

/* --- Services Section --- */
.services {
  background: var(--neutral-950);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.service-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.service-card:hover {
  transform: translateY(-5px);
  border-color: rgba(230, 126, 34, 0.15);
  box-shadow: var(--shadow-lg);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 56px;
  height: 56px;
  background: rgba(230, 126, 34, 0.08);
  border: 1px solid rgba(230, 126, 34, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-xl);
  transition: all var(--transition-base);
}

.service-card:hover .service-icon {
  background: rgba(230, 126, 34, 0.15);
  border-color: rgba(230, 126, 34, 0.3);
  transform: scale(1.05);
}

.service-card h3 {
  margin-bottom: var(--space-md);
  font-size: 1.2rem;
}

.service-card p {
  font-size: 0.92rem;
  color: var(--neutral-400);
}

.service-card-img {
  margin-top: var(--space-xl);
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 160px;
}

.service-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.service-card:hover .service-card-img img {
  transform: scale(1.05);
}

/* --- Gallery Section --- */
.gallery {
  background: var(--neutral-900);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 280px;
  gap: var(--space-lg);
}

.gallery-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.08);
}

/* Watermark MS Logo */
.gallery-watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  pointer-events: none;
}

.gallery-watermark img {
  width: 120px;
  height: auto;
  opacity: 0.08;
  filter: brightness(10);
}

.gallery-item:hover .gallery-watermark img {
  opacity: 0.15;
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 50%, rgba(6, 8, 12, 0.85) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: var(--space-xl);
  z-index: 3;
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-overlay-text {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--neutral-50);
}

/* --- References Section --- */
.references-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.ref-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.ref-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(230, 126, 34, 0.06) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.ref-card:hover {
  border-color: rgba(230, 126, 34, 0.2);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(230, 126, 34, 0.05);
}

.ref-card:hover::before {
  opacity: 1;
}

.ref-card img {
  max-height: 55px;
  max-width: 80%;
  object-fit: contain;
  filter: brightness(0.9) opacity(0.85);
  transition: all var(--transition-base);
  position: relative;
  z-index: 1;
}

.ref-card:hover img {
  filter: brightness(1.1) opacity(1);
  transform: scale(1.06);
}

/* --- Values / Why Us --- */
.values,
.values-section {
  background: var(--neutral-950);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.value-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
  background: var(--gradient-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.value-card:hover {
  transform: translateY(-5px);
  border-color: rgba(230, 126, 34, 0.15);
  box-shadow: var(--shadow-md);
}

.value-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-xl);
  background: rgba(230, 126, 34, 0.08);
  border: 1px solid rgba(230, 126, 34, 0.15);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  transition: all var(--transition-base);
}

.value-card:hover .value-icon {
  background: rgba(230, 126, 34, 0.15);
  transform: scale(1.1) rotate(5deg);
}

.value-card h3 {
  margin-bottom: var(--space-md);
  font-size: 1.1rem;
}

.value-card p {
  font-size: 0.88rem;
  color: var(--neutral-400);
}

/* --- Contact Section --- */
.contact {
  background: var(--neutral-900);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
}

.contact-info .section-label {
  text-align: left;
}

.contact-info .section-title {
  text-align: left;
}

.contact-info .section-desc {
  margin-bottom: var(--space-2xl);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  margin-top: auto;
}

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
}

.contact-detail-icon {
  width: 48px;
  height: 48px;
  background: rgba(230, 126, 34, 0.08);
  border: 1px solid rgba(230, 126, 34, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-detail-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--neutral-500);
  margin-bottom: 2px;
}

.contact-detail-value {
  font-size: 1rem;
  color: var(--neutral-200);
}

/* Contact Form */
.contact-form-wrapper {
  background: var(--gradient-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  backdrop-filter: blur(10px);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--neutral-300);
}

.form-group input,
.form-group textarea {
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--neutral-100);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-400);
  box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.1);
  background: rgba(255, 255, 255, 0.05);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--neutral-600);
}

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

.form-submit {
  width: 100%;
  justify-content: center;
  padding: 16px;
  font-size: 1rem;
}

/* --- Footer --- */
.footer {
  background: var(--neutral-950);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--neutral-500);
  margin-top: var(--space-md);
  max-width: 300px;
}

.footer-title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--neutral-300);
  margin-bottom: var(--space-xl);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-link {
  font-size: 0.9rem;
  color: var(--neutral-500);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-400);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--neutral-600);
}

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-400);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: rgba(230, 126, 34, 0.1);
  border-color: rgba(230, 126, 34, 0.3);
  color: var(--accent-400);
  transform: translateY(-2px);
}

/* --- Animations --- */
@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 220px;
  }

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

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

@media (max-width: 768px) {
  :root {
    --nav-height: 70px;
  }

  .container {
    padding: 0 var(--space-lg);
  }

  .nav-links {
    position: fixed;
    inset: 0;
    background: rgba(6, 8, 12, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: var(--space-2xl);
    transform: translateX(100%);
    transition: transform var(--transition-base);
  }

  .nav-links.active {
    transform: translateX(0);
  }

  .nav-link {
    font-size: 1.2rem;
  }

  .nav-hamburger {
    display: flex;
  }

  .hero h1 {
    font-size: clamp(2rem, 7vw, 3rem);
  }

  .hero-stats {
    gap: var(--space-xl);
    flex-wrap: wrap;
  }

  .hero-stat-value {
    font-size: 1.6rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

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

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

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

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 200px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .section {
    padding: var(--space-4xl) 0;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
}