/* ==========================================
   ArthaTek AI – Design System & Styles
   Professional Dark Theme
   ========================================== */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ==========================================
   CSS Custom Properties
   ========================================== */
:root {
  /* Colors — Deep navy + teal/cyan + gold */
  --navy-950: #020617;
  --navy-900: #0a0f1e;
  --navy-800: #0f172a;
  --navy-700: #1a2332;
  --navy-600: #253040;
  --navy-500: #334155;

  --teal-400: #2dd4bf;
  --teal-500: #14b8a6;
  --cyan-400: #22d3ee;
  --blue-500: #3b82f6;
  --blue-400: #60a5fa;

  --gold-400: #c9a84c;
  --gold-300: #dbb85c;

  --white: #ffffff;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;

  /* Functional */
  --bg-primary: var(--navy-900);
  --bg-secondary: var(--navy-800);
  --bg-card: rgba(15, 23, 42, 0.6);
  --bg-card-hover: rgba(25, 35, 55, 0.8);
  --text-primary: var(--gray-100);
  --text-secondary: var(--gray-400);
  --text-muted: var(--gray-500);
  --accent-primary: var(--teal-400);
  --accent-secondary: var(--blue-500);
  --border-color: rgba(51, 65, 85, 0.5);

  /* Gradients */
  --gradient-accent: linear-gradient(135deg, var(--teal-400), var(--blue-500));
  --gradient-hero: radial-gradient(ellipse at 20% 50%, rgba(45, 212, 191, 0.08) 0%, transparent 50%),
                    radial-gradient(ellipse at 80% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
                    var(--bg-primary);
  --gradient-card: linear-gradient(135deg, rgba(45, 212, 191, 0.05), rgba(59, 130, 246, 0.05));
  --gradient-glow: linear-gradient(135deg, var(--teal-400), var(--cyan-400), var(--blue-500));

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 56px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(45, 212, 191, 0.15);
  --shadow-glow-blue: 0 0 40px rgba(59, 130, 246, 0.15);

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --section-pad: 120px 24px;
  --container-max: 1200px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(45, 212, 191, 0.1);
  color: var(--accent-primary);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 8px 20px;
  border-radius: 50px;
  border: 1px solid rgba(45, 212, 191, 0.2);
  margin-bottom: 20px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.8;
}

.section-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

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

/* Reveal animation */
.reveal, .reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ==========================================
   Navigation
   ========================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all 0.4s ease;
}

.navbar.scrolled {
  background: rgba(10, 15, 30, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo-img {
  height: 40px;
  width: auto;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--gradient-glow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.3s ease;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width 0.3s ease;
  border-radius: 2px;
}

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

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

.nav-cta {
  background: var(--gradient-accent) !important;
  color: var(--navy-900) !important;
  padding: 10px 24px !important;
  border-radius: 50px !important;
  font-weight: 600 !important;
  transition: transform 0.3s ease, box-shadow 0.3s ease !important;
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  transform: translateY(-2px) !important;
  box-shadow: var(--shadow-glow) !important;
}

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

.hamburger span {
  width: 24px;
  height: 2.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

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

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

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

.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.nav-overlay.active {
  opacity: 1;
  pointer-events: all;
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--gradient-hero);
  overflow: hidden;
  padding: 120px 24px 80px;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45, 212, 191, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 212, 191, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.hero-glow-1 {
  top: 10%;
  left: 5%;
  width: 500px;
  height: 500px;
  background: rgba(45, 212, 191, 0.08);
  animation: pulseGlow 8s ease-in-out infinite;
}

.hero-glow-2 {
  bottom: 10%;
  right: 5%;
  width: 400px;
  height: 400px;
  background: rgba(59, 130, 246, 0.08);
  animation: pulseGlow 10s ease-in-out infinite reverse;
}

@keyframes pulseGlow {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.2); opacity: 1; }
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(45, 212, 191, 0.08);
  backdrop-filter: blur(10px);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent-primary);
  margin-bottom: 28px;
  border: 1px solid rgba(45, 212, 191, 0.15);
  animation: fadeInDown 0.8s ease forwards;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--teal-400);
  border-radius: 50%;
  animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5.5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: 24px;
  animation: fadeInUp 0.8s 0.2s ease forwards;
  opacity: 0;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 520px;
  animation: fadeInUp 0.8s 0.4s ease forwards;
  opacity: 0;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s 0.6s ease forwards;
  opacity: 0;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-accent);
  color: var(--navy-900);
  padding: 16px 36px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 8px 32px rgba(45, 212, 191, 0.2);
  position: relative;
  overflow: hidden;
  font-family: var(--font-body);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: left 0.5s ease;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(45, 212, 191, 0.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-primary);
  padding: 16px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: var(--font-body);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.05);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

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

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  animation: fadeInUp 0.8s 0.8s ease forwards;
  opacity: 0;
}

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

.hero-stat-value {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  background: var(--gradient-glow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 4px;
}

.hero-stat-divider {
  width: 1px;
  background: var(--border-color);
  align-self: stretch;
}

/* Hero Visual — Floating Cards */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInUp 1s 0.5s ease forwards;
  opacity: 0;
}

.hero-card-stack {
  position: relative;
  width: 420px;
  height: 420px;
}

.floating-card {
  position: absolute;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(45, 212, 191, 0.15);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease;
}

.floating-card:hover {
  transform: translateY(-4px) !important;
}

.card-icon {
  font-size: 1.5rem;
}

.card-1 {
  top: 20px;
  left: 30px;
  animation: float1 6s ease-in-out infinite;
}

.card-2 {
  top: 120px;
  right: 10px;
  animation: float2 7s ease-in-out infinite;
}

.card-3 {
  bottom: 120px;
  left: 10px;
  animation: float3 8s ease-in-out infinite;
}

.card-4 {
  bottom: 20px;
  right: 30px;
  animation: float4 6.5s ease-in-out infinite;
}

@keyframes float1 {
  0%, 100% { transform: translateY(0) rotate(-1deg); }
  50% { transform: translateY(-12px) rotate(1deg); }
}

@keyframes float2 {
  0%, 100% { transform: translateY(0) rotate(1deg); }
  50% { transform: translateY(-10px) rotate(-1deg); }
}

@keyframes float3 {
  0%, 100% { transform: translateY(0) rotate(1deg); }
  50% { transform: translateY(-14px) rotate(-1deg); }
}

@keyframes float4 {
  0%, 100% { transform: translateY(0) rotate(-1deg); }
  50% { transform: translateY(-8px) rotate(1deg); }
}

/* ==========================================
   About Section
   ========================================== */
.about {
  padding: var(--section-pad);
  background: var(--bg-primary);
  position: relative;
}

.about .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-metrics {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all 0.4s ease;
}

.metric-card:hover {
  border-color: rgba(45, 212, 191, 0.3);
  background: var(--bg-card-hover);
  transform: translateX(8px);
}

.metric-icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.metric-card h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.metric-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================
   Services Section
   ========================================== */
.services {
  padding: var(--section-pad);
  background: var(--bg-secondary);
  position: relative;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  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);
  transition: transform 0.4s ease;
  transform-origin: left;
}

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

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(45, 212, 191, 0.25);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.service-icon-wrapper {
  width: 56px;
  height: 56px;
  background: rgba(45, 212, 191, 0.1);
  border: 1px solid rgba(45, 212, 191, 0.2);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--accent-primary);
  transition: all 0.4s ease;
}

.service-card:hover .service-icon-wrapper {
  background: var(--gradient-accent);
  color: var(--navy-900);
  border-color: transparent;
  transform: scale(1.05);
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.service-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-tags span {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-primary);
  background: rgba(45, 212, 191, 0.08);
  border: 1px solid rgba(45, 212, 191, 0.15);
  padding: 4px 12px;
  border-radius: 50px;
}

/* ==========================================
   Why Us Section
   ========================================== */
.why-us {
  padding: var(--section-pad);
  background: var(--bg-primary);
}

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

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: all 0.4s ease;
  position: relative;
}

.why-card:hover {
  border-color: rgba(45, 212, 191, 0.25);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.why-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-glow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.3;
  margin-bottom: 16px;
  line-height: 1;
}

.why-card:hover .why-number {
  opacity: 0.6;
}

.why-card h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.why-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact {
  padding: var(--section-pad);
  background: var(--bg-secondary);
  position: relative;
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 32px;
}

.contact-detail-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: rgba(45, 212, 191, 0.1);
  border: 1px solid rgba(45, 212, 191, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
}

.contact-detail-item h5 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.contact-detail-item a,
.contact-detail-item p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.contact-detail-item a:hover {
  color: var(--accent-primary);
}

/* Contact Form */
.contact-form-wrapper {
  position: relative;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  background: rgba(10, 15, 30, 0.5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-body);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  outline: none;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.1);
}

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

.form-success {
  display: none;
  text-align: center;
  padding: 60px 40px;
  background: var(--bg-card);
  border: 1px solid rgba(45, 212, 191, 0.3);
  border-radius: var(--radius-lg);
}

.form-success.show {
  display: block;
}

.success-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-accent);
  color: var(--navy-900);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 auto 20px;
}

.form-success h4 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.form-success p {
  color: var(--text-secondary);
}

/* ==========================================
   Footer
   ========================================== */
.footer {
  padding: 60px 24px 30px;
  background: var(--navy-950);
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo-img {
  height: 40px;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer-links-group h5 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-links-group ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-group a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

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

.back-to-top {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.back-to-top:hover {
  color: var(--accent-primary);
}

/* ==========================================
   Responsive — Tablet
   ========================================== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-subtitle {
    max-width: 100%;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    display: none;
  }

  .about .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

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

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

/* ==========================================
   Responsive — Mobile
   ========================================== */
@media (max-width: 768px) {
  :root {
    --section-pad: 80px 16px;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: rgba(10, 15, 30, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 24px;
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: -8px 0 32px rgba(0,0,0,0.3);
    padding: 24px;
    border-left: 1px solid var(--border-color);
  }

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

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

  .hamburger {
    display: flex;
  }

  .hero {
    padding: 100px 16px 60px;
    min-height: auto;
  }

  .hero-title {
    font-size: clamp(1.8rem, 7vw, 2.8rem);
  }

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

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

  .section-title {
    font-size: clamp(1.6rem, 6vw, 2.4rem);
  }

  .contact-form {
    padding: 28px 20px;
  }

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

/* ==========================================
   Responsive — Small Mobile
   ========================================== */
@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .hero-stat-divider {
    width: 40px;
    height: 1px;
    align-self: center;
  }
}