/* =============================================
   CAD — Design System
   ============================================= */
:root {
  --black: #0a0a0a;
  --white: #ffffff;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-300: #d4d4d4;
  --gray-400: #a3a3a3;
  --gray-500: #737373;
  --gray-600: #525252;
  --gray-700: #404040;
  --gray-800: #262626;
  --gray-900: #171717;
  --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-accent: linear-gradient(135deg, #667eea, #764ba2);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width: 1200px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--gray-700) transparent;
}

body {
  font-family: var(--font);
  background: var(--black);
  color: var(--gray-100);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

::selection {
  background: #667eea;
  color: var(--white);
}

/* =============================================
   Container
   ============================================= */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* =============================================
   Typography
   ============================================= */
.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section {
  padding: 120px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #667eea;
  border: 1px solid rgba(102, 126, 234, 0.3);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--gray-400);
  line-height: 1.7;
}

/* =============================================
   Buttons
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: 50px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--white);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(102, 126, 234, 0.4);
}

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

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

/* =============================================
   Navigation
   ============================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding: 12px 0;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-400);
  transition: var(--transition);
  position: relative;
}

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

.nav-links a:hover {
  color: var(--white);
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

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

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

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

/* =============================================
   Hero
   ============================================= */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(0,0,0,0.65), rgba(0,0,0,0.8)),
    url('assets/bg-04.jpg') center/cover no-repeat fixed;
  pointer-events: none;
  z-index: 0;
}

.hero-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  transition: opacity 0.3s;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding-top: 80px;
}

.hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #667eea;
  border: 1px solid rgba(102, 126, 234, 0.25);
  padding: 8px 20px;
  border-radius: 100px;
  margin-bottom: 24px;
  animation: fadeUp 0.8s ease-out;
}

.hero-title {
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
  animation: fadeUp 0.8s ease-out 0.15s both;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--gray-400);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
  animation: fadeUp 0.8s ease-out 0.3s both;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeUp 0.8s ease-out 0.45s both;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 80px;
  animation: fadeUp 0.8s ease-out 0.6s both;
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--gray-500);
  font-weight: 500;
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--gray-500);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: fadeUp 0.8s ease-out 0.8s both;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--gray-500), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* =============================================
   About
   ============================================= */
.about {
  background:
    linear-gradient(rgba(23,23,23,0.95), rgba(23,23,23,0.95)),
    url('assets/bg-01.jpg') center/cover no-repeat fixed;
}

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

.about-card {
  background: rgba(38, 38, 38, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition);
}

.about-card:hover {
  border-color: #667eea;
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.about-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: rgba(102, 126, 234, 0.1);
  color: #667eea;
  margin-bottom: 20px;
}

.about-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.about-card p {
  color: var(--gray-400);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* =============================================
   Services
   ============================================= */
.services {
  background:
    linear-gradient(rgba(0,0,0,0.88), rgba(0,0,0,0.88)),
    url('assets/bg-05.jpg') center/cover no-repeat fixed;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: rgba(23, 23, 23, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

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

.service-card:hover {
  border-color: var(--gray-700);
  transform: translateY(-4px);
}

.service-number {
  font-size: 3rem;
  font-weight: 900;
  color: rgba(102, 126, 234, 0.1);
  line-height: 1;
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.service-card p {
  color: var(--gray-400);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* =============================================
   Pricing
   ============================================= */
.pricing {
  background: var(--black);
}

.pricing-simple {
  display: flex;
  justify-content: center;
}

.pricing-simple-card {
  background: var(--gray-900);
  border: 1px solid var(--gray-800);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  max-width: 520px;
  width: 100%;
  transition: var(--transition);
}

.pricing-simple-card:hover {
  border-color: var(--gray-700);
  transform: translateY(-4px);
}

.pricing-simple-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  margin-bottom: 16px;
}

.pricing-simple-amount {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 16px;
}

.pricing-simple-amount .pricing-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-400);
}

.pricing-simple-amount .pricing-value {
  font-size: 4rem;
  font-weight: 900;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  letter-spacing: -0.04em;
}

.pricing-simple-note {
  font-size: 1rem;
  color: var(--gray-500);
  font-weight: 500;
  margin-left: 4px;
}

.pricing-simple-desc {
  color: var(--gray-400);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 380px;
  margin-left: auto;
  margin-right: auto;
}

/* =============================================
   Portfolio
   ============================================= */
.portfolio {
  background:
    linear-gradient(rgba(23,23,23,0.92), rgba(23,23,23,0.92)),
    url('assets/bg-05.jpg') center/cover no-repeat fixed;
}

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

.portfolio-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--gray-800);
  border: 1px solid var(--gray-700);
  transition: var(--transition);
  animation: fadeUp 0.6s ease-out both;
  animation-delay: calc(var(--i, 0) * 0.1s);
}

.portfolio-item:hover {
  transform: translateY(-6px);
  border-color: #667eea;
  box-shadow: 0 24px 60px rgba(0,0,0,0.4);
}

.portfolio-image {
  aspect-ratio: 16 / 11;
  overflow: hidden;
}

.portfolio-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.portfolio-item:hover .portfolio-placeholder {
  transform: scale(1.08);
}

.portfolio-label {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
  opacity: 0.5;
}

.portfolio-info {
  padding: 20px 24px 24px;
}

.portfolio-category {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #667eea;
  margin-bottom: 6px;
  display: block;
}

.portfolio-info h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.portfolio-info p {
  font-size: 0.85rem;
  color: var(--gray-400);
}

/* =============================================
   Testimonials
   ============================================= */
.testimonials {
  background:
    linear-gradient(rgba(0,0,0,0.85), rgba(0,0,0,0.85)),
    url('assets/bg-02.jpg') center/cover no-repeat;
  background-attachment: fixed;
}

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

.testimonial-card {
  background: rgba(23, 23, 23, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: var(--gray-700);
  transform: translateY(-4px);
}

.testimonial-stars {
  color: #fbbf24;
  font-size: 1.1rem;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.testimonial-text {
  color: var(--gray-300);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 24px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

.testimonial-author strong {
  display: block;
  font-size: 0.9rem;
}

.testimonial-author span {
  display: block;
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* =============================================
   Contact
   ============================================= */
.contact {
  background:
    linear-gradient(rgba(23,23,23,0.96), rgba(23,23,23,0.96)),
    url('assets/bg-03.jpg') center/cover no-repeat fixed;
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info .section-title {
  margin-bottom: 16px;
}

.contact-info > p {
  color: var(--gray-400);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 32px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--gray-300);
  font-size: 0.95rem;
}

.contact-detail svg {
  color: #667eea;
  flex-shrink: 0;
}

.contact-form {
  background: rgba(38, 38, 38, 0.9);
  backdrop-filter: blur(12px);
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  background: var(--gray-900);
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-sm);
  color: var(--white);
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-500);
}

/* =============================================
   Footer
   ============================================= */
.footer {
  background:
    linear-gradient(rgba(23,23,23,0.97), rgba(23,23,23,0.97)),
    url('assets/gallery-01.jpg') center/cover no-repeat fixed;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 64px 0 32px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  font-size: 1.75rem;
}

.footer-brand p {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 320px;
  line-height: 1.7;
}

.footer-links h4 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  margin-bottom: 20px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--gray-500);
  transition: var(--transition);
}

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

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--gray-800);
  text-align: center;
}

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

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

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

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

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    transition: var(--transition);
    border-left: 1px solid var(--gray-800);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    font-size: 1.1rem;
  }

  .menu-toggle {
    display: flex;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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

  .section {
    padding: 80px 0;
  }

  .about-grid,
  .services-grid,
  .portfolio-grid,
  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact-form {
    padding: 24px;
  }

  .section-header {
    margin-bottom: 40px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .stat-item {
    flex: 1;
    min-width: 80px;
  }
}

/* =============================================
   Smooth Scroll Animation
   ============================================= */
html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}