/* ===== CSS Variables ===== */
:root {
  --bg: #14131A;
  --surface: #1E1C28;
  --surface-hover: #262436;
  --border: #302E3E;
  --border-light: #3F3D50;
  --primary: #E4873E;
  --primary-rgb: 228, 135, 62;
  --primary-hover: #F59B54;
  --primary-dark: #C97235;
  --secondary: #4EC4A8;
  --secondary-rgb: 78, 196, 168;
  --secondary-hover: #5FDABC;
  --text: #EDEBF0;
  --text-muted: #A29FB2;
  --text-dim: #78758D;
  --danger: #E05555;
  --danger-rgb: 224, 85, 85;
  --gradient-start: #14131A;
  --gradient-end: #1F1C2D;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.45);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--primary-hover);
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
}

h1 { font-size: clamp(2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: 1rem; }
h3 { font-size: 1.35rem; margin-bottom: 0.5rem; }

p {
  margin-bottom: 1rem;
  color: var(--text-muted);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
  line-height: 1.2;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 16px rgba(var(--primary-rgb), 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover), var(--primary));
  box-shadow: 0 6px 24px rgba(var(--primary-rgb), 0.5);
  transform: translateY(-2px);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(var(--secondary-rgb), 0.15);
  border: 1px solid var(--secondary);
  color: var(--secondary);
}

.btn-secondary:hover {
  background: var(--secondary);
  color: #14131A;
  transform: translateY(-2px);
}

/* ===== Navigation (.main-nav class - NOT bare nav) ===== */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(20, 19, 26, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}

.main-nav.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
  background: rgba(20, 19, 26, 0.96);
}

.main-nav .nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: 1140px;
  margin: 0 auto;
}

.main-nav .nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.main-nav .nav-logo .logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  display: inline-block;
  box-shadow: 0 0 12px rgba(var(--primary-rgb), 0.7);
}

.main-nav .nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
  align-items: center;
}

.main-nav .nav-links a {
  display: block;
  padding: 8px 18px;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all var(--transition);
}

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

.main-nav .nav-links .nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-weight: 600;
}

.main-nav .nav-links .nav-cta:hover {
  background: linear-gradient(135deg, var(--primary-hover), var(--primary));
  color: #fff;
  box-shadow: 0 4px 16px rgba(var(--primary-rgb), 0.4);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
  transform-origin: center;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ===== Home Page Wrapper ===== */
.home-page {
  overflow-x: hidden;
}

/* ===== Hero Section ===== */
.hero-section {
  position: relative;
  padding: 160px 0 100px;
  text-align: center;
  background: linear-gradient(160deg, var(--gradient-start) 0%, var(--gradient-end) 60%, #18172A 100%);
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(var(--primary-rgb), 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(var(--secondary-rgb), 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-section .hero-badge {
  display: inline-block;
  padding: 6px 20px;
  border-radius: 50px;
  border: 1px solid var(--border-light);
  background: rgba(var(--primary-rgb), 0.08);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.hero-section h1 {
  max-width: 800px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--text) 0%, #D5D0E0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-section .hero-subtitle {
  max-width: 640px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.hero-section .hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-section .hero-stats {
  display: flex;
  gap: 48px;
  justify-content: center;
  margin-top: 64px;
  flex-wrap: wrap;
}

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

.hero-stats .stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  display: block;
}

.hero-stats .stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ===== Section Common ===== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header .section-tag {
  display: inline-block;
  padding: 4px 16px;
  border-radius: 50px;
  background: rgba(var(--primary-rgb), 0.1);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-header h2 {
  margin-bottom: 12px;
}

.section-header .section-desc {
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* ===== About Section ===== */
.about-section {
  padding: 100px 0;
  position: relative;
}

.about-section .about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-section .about-visual {
  position: relative;
  height: 380px;
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-section .about-visual-inner {
  text-align: center;
  padding: 40px;
  position: relative;
  z-index: 1;
}

.about-section .about-visual-icon {
  font-size: 4rem;
  margin-bottom: 16px;
  display: block;
  filter: grayscale(0.2);
}

.about-section .about-visual-label {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-weight: 500;
}

.about-section .about-visual::before {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(var(--primary-rgb), 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.about-section .about-visual::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: -20px;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(var(--secondary-rgb), 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.about-section .about-text h2 {
  margin-bottom: 16px;
}

.about-section .about-text p {
  margin-bottom: 14px;
  font-size: 1.02rem;
  line-height: 1.8;
}

.about-section .about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 24px;
}

.about-section .about-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.about-section .about-feature-item .af-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.about-section .about-feature-item .af-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.about-section .about-feature-item .af-text strong {
  color: var(--text);
  display: block;
  margin-bottom: 2px;
}

/* ===== Services Section ===== */
.services-section {
  padding: 100px 0;
  background: var(--surface);
  position: relative;
}

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

.services-section .service-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.services-section .service-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.services-section .service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

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

.services-section .service-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  background: rgba(var(--primary-rgb), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

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

.services-section .service-card p {
  font-size: 0.92rem;
  margin-bottom: 0;
  line-height: 1.7;
}

/* ===== Features / Process Section ===== */
.features-section {
  padding: 100px 0;
}

.features-section .features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.features-section .feature-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.features-section .feature-card:hover {
  background: var(--surface-hover);
  border-color: var(--secondary);
  transform: translateY(-3px);
}

.features-section .feature-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(var(--secondary-rgb), 0.15);
  color: var(--secondary);
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.features-section .feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.features-section .feature-card p {
  font-size: 0.88rem;
  margin-bottom: 0;
  line-height: 1.6;
}

/* ===== Testimonials Section ===== */
.testimonials-section {
  padding: 100px 0;
  background: var(--surface);
}

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

.testimonials-section .testimonial-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
}

.testimonials-section .testimonial-card .t-quote {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

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

.testimonials-section .testimonial-card .t-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(var(--primary-rgb), 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--primary);
  font-size: 0.9rem;
}

.testimonials-section .testimonial-card .t-name {
  font-weight: 600;
  color: var(--text);
  font-size: 0.9rem;
}

.testimonials-section .testimonial-card .t-role {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ===== Contact Section ===== */
.contact-section {
  padding: 100px 0;
}

.contact-section .contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.contact-section .contact-info h2 {
  margin-bottom: 16px;
}

.contact-section .contact-info p {
  margin-bottom: 28px;
}

.contact-section .contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}

.contact-section .contact-detail .cd-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: rgba(var(--primary-rgb), 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-section .contact-detail .cd-text strong {
  display: block;
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.contact-section .contact-detail .cd-text span {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.contact-section .contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
}

.contact-section .form-group {
  margin-bottom: 20px;
}

.contact-section .form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
  color: var(--text);
}

.contact-section .form-group input,
.contact-section .form-group textarea,
.contact-section .form-group select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition);
  outline: none;
}

.contact-section .form-group input:focus,
.contact-section .form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.12);
}

.contact-section .form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-section .form-feedback {
  margin-top: 12px;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  display: none;
}

.contact-section .form-feedback.success {
  display: block;
  background: rgba(var(--secondary-rgb), 0.12);
  border: 1px solid var(--secondary);
  color: var(--secondary);
}

.contact-section .form-feedback.error {
  display: block;
  background: rgba(var(--danger-rgb), 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(135deg, var(--surface), #25223A);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(var(--primary-rgb), 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-section h2 {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.cta-section p {
  max-width: 540px;
  margin: 0 auto 28px;
  font-size: 1.05rem;
}

/* ===== Footer ===== */
.site-footer {
  background: #0E0D14;
  border-top: 1px solid var(--border);
  padding: 48px 0 28px;
}

.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}

.site-footer .footer-brand h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.site-footer .footer-brand p {
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 0;
}

.site-footer .footer-col h4 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
  color: var(--text-dim);
}

.site-footer .footer-col ul {
  list-style: none;
}

.site-footer .footer-col ul li {
  margin-bottom: 10px;
}

.site-footer .footer-col ul li a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.site-footer .footer-col ul li a:hover {
  color: var(--primary);
}

.site-footer .footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.site-footer .footer-bottom a {
  color: var(--text-muted);
}

.site-footer .footer-bottom a:hover {
  color: var(--primary);
}

/* ===== Scroll Reveal ===== */
.fade-up {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

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

@media (max-width: 768px) {
  .about-section .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .about-section .about-visual {
    height: 260px;
  }
  .services-section .services-grid {
    grid-template-columns: 1fr;
  }
  .features-section .features-grid {
    grid-template-columns: 1fr 1fr;
  }
  .testimonials-section .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .contact-section .contact-grid {
    grid-template-columns: 1fr;
  }
  .site-footer .footer-grid {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    background: var(--bg);
    padding: 90px 28px 28px;
    gap: 4px;
    border-left: 1px solid var(--border);
    transition: right var(--transition);
    box-shadow: var(--shadow-lg);
  }

  .main-nav .nav-links.active {
    right: 0;
  }

  .main-nav .nav-links a {
    width: 100%;
    padding: 12px 16px;
  }

  .hero-section {
    padding: 120px 0 64px;
  }

  .hero-section .hero-stats {
    gap: 24px;
    margin-top: 40px;
  }

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

  .about-section,
  .services-section,
  .features-section,
  .testimonials-section,
  .contact-section {
    padding: 64px 0;
  }

  .cta-section {
    padding: 56px 0;
  }
}

@media (max-width: 480px) {
  .features-section .features-grid {
    grid-template-columns: 1fr;
  }
  .hero-section .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  .contact-section .contact-form {
    padding: 24px 20px;
  }
}