/* ============================================================
   Group Elite LLC — Stylesheet
   Institutional Fintech Website
   ============================================================ */

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

/* ============================================================
   CSS CUSTOM PROPERTIES
   ============================================================ */
:root {
  /* Colors */
  --bg-primary: #080e1e;
  --bg-secondary: #0d1a30;
  --bg-tertiary: #111f3a;
  --accent-primary: #2b7fff;
  --accent-secondary: #00c2ff;
  --accent-glow: rgba(43, 127, 255, 0.15);
  --text-primary: #f0f4ff;
  --text-secondary: #a0b0cc;
  --border-color: rgba(43, 127, 255, 0.18);
  --border-hover: rgba(43, 127, 255, 0.5);
  --card-bg: rgba(17, 31, 58, 0.85);
  --card-border: rgba(43, 127, 255, 0.22);

  /* Typography */
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --section-padding: 120px 0;
  --container-width: 1200px;
  --container-padding: 0 24px;
  --gap-sm: 8px;
  --gap-md: 16px;
  --gap-lg: 24px;
  --gap-xl: 40px;
  --gap-2xl: 64px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Navbar */
  --nav-height: 72px;
}

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

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, textarea {
  font-family: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--container-padding);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: var(--gap-md);
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: var(--gap-md);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.7;
}

/* Fade-in animation for scroll reveal */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ============================================================
   NAVIGATION
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
  background: rgba(8, 14, 30, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border-color), 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  height: 40px;
  flex-shrink: 0;
}

.nav-logo img {
  height: 36px;
  width: auto;
  filter: brightness(0) invert(1);
}

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

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  letter-spacing: 0.02em;
}

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

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

.btn-portal {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), border-color var(--transition-fast);
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.btn-portal:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition-base), opacity var(--transition-base);
  border-radius: 1px;
}

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

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

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

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

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 50% 40%, rgba(43, 127, 255, 0.18) 0%, transparent 55%),
    radial-gradient(ellipse at center, rgba(8, 14, 30, 0.05) 0%, rgba(8, 14, 30, 0.65) 60%, rgba(8, 14, 30, 0.95) 100%);
  z-index: 1;
}

/* Ambient glow behind hero content */
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 820px;
  padding: 0 24px;
}

.hero-content::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(43, 127, 255, 0.2) 0%, transparent 65%);
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
}

.hero-headline {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: var(--gap-lg);
  letter-spacing: -0.02em;
}

.hero-headline .accent {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subheadline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 680px;
  margin: 0 auto var(--gap-xl);
}

.hero-ctas {
  display: flex;
  gap: var(--gap-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: #fff;
  background: var(--accent-primary);
  padding: 14px 32px;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  letter-spacing: 0.01em;
}

.btn-primary:hover {
  background: #1558d6;
  transform: translateY(-1px);
  box-shadow: 0 8px 30px rgba(26, 109, 255, 0.25);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 14px 32px;
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.btn-ghost:hover {
  border-color: var(--accent-primary);
  background: rgba(26, 109, 255, 0.06);
  transform: translateY(-1px);
}

/* ============================================================
   VALUE STRIP
   ============================================================ */
.value-strip {
  padding: 80px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-lg);
}

.value-item {
  text-align: center;
  padding: var(--gap-xl) var(--gap-lg);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.value-item:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 4px 24px var(--accent-glow);
}

.value-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--gap-lg);
}

.value-icon svg {
  width: 100%;
  height: 100%;
}

.value-item h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: var(--gap-sm);
}

.value-item p {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about {
  padding: var(--section-padding);
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-2xl);
  align-items: start;
}

.about-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--gap-lg);
  line-height: 1.8;
}

.mission-box {
  margin-top: var(--gap-xl);
  padding: var(--gap-lg) var(--gap-xl);
  background: rgba(43, 127, 255, 0.08);
  border-left: 3px solid var(--accent-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  border: 1px solid var(--card-border);
  border-left: 3px solid var(--accent-primary);
}

.mission-box p {
  font-size: 1rem;
  color: var(--text-primary);
  font-style: italic;
  line-height: 1.8;
  margin-bottom: 0;
}

/* About network visualization */
.about-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.about-network {
  position: relative;
  width: 400px;
  height: 400px;
}

.network-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Node glow animation */
.node-core {
  animation: core-pulse 3s ease-in-out infinite;
}

@keyframes core-pulse {
  0%, 100% { filter: drop-shadow(0 0 4px rgba(43, 127, 255, 0.3)); }
  50% { filter: drop-shadow(0 0 12px rgba(43, 127, 255, 0.6)); }
}

.node-inner {
  animation: node-blink 4s ease-in-out infinite;
}

.network-nodes .node:nth-of-type(3) .node-inner { animation-delay: 0.5s; }
.network-nodes .node:nth-of-type(5) .node-inner { animation-delay: 1s; }
.network-nodes .node:nth-of-type(7) .node-inner { animation-delay: 1.5s; }
.network-nodes .node:nth-of-type(9) .node-inner { animation-delay: 2s; }
.network-nodes .node:nth-of-type(11) .node-inner { animation-delay: 2.5s; }
.network-nodes .node:nth-of-type(13) .node-inner { animation-delay: 3s; }

@keyframes node-blink {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.9; }
}

/* Pulse lines — data flowing through network */
.pulse-line {
  stroke-dasharray: 8 200;
  stroke-dashoffset: 0;
  opacity: 0;
}

.pulse-1 {
  animation: line-pulse 3s ease-in-out infinite;
}

.pulse-2 {
  animation: line-pulse 3s ease-in-out 0.8s infinite;
}

.pulse-3 {
  animation: line-pulse 3s ease-in-out 1.6s infinite;
}

.pulse-4 {
  animation: line-pulse 3.5s ease-in-out 2.2s infinite;
}

@keyframes line-pulse {
  0% {
    stroke-dashoffset: 200;
    opacity: 0;
  }
  30% {
    opacity: 0.8;
  }
  100% {
    stroke-dashoffset: -200;
    opacity: 0;
  }
}

/* Network labels */
.network-labels text {
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ============================================================
   SERVICES SECTION
   ============================================================ */
.services {
  padding: var(--section-padding);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.services-header {
  margin-bottom: var(--gap-2xl);
}

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

.service-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--gap-xl);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.service-card:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 8px 40px rgba(43, 127, 255, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  transform: translateY(-3px);
  background: rgba(20, 36, 66, 0.9);
}

.service-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
  margin-bottom: var(--gap-md);
  letter-spacing: 0.05em;
}

.service-card h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: var(--gap-sm);
  line-height: 1.4;
}

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

/* ============================================================
   TECHNOLOGY SECTION
   ============================================================ */
.technology {
  padding: var(--section-padding);
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(13, 26, 48, 0.5) 50%, var(--bg-primary) 100%);
}

.technology-header {
  margin-bottom: var(--gap-2xl);
}

.tech-tabs {
  display: flex;
  gap: var(--gap-sm);
  margin-bottom: var(--gap-xl);
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0;
}

.tech-tab {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--gap-md) var(--gap-lg);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
  margin-bottom: -1px;
}

.tech-tab:hover {
  color: var(--text-primary);
}

.tech-tab.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}

.tech-panel {
  display: none;
  animation: fadePanel 0.4s ease;
}

.tech-panel.active {
  display: block;
}

@keyframes fadePanel {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tech-panel-content {
  padding: var(--gap-xl) 0;
}

.tech-panel-content h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: var(--gap-md);
}

.tech-panel-content p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--gap-lg);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-sm);
  margin-bottom: var(--gap-lg);
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-secondary);
  background: rgba(0, 194, 255, 0.08);
  border: 1px solid rgba(0, 194, 255, 0.2);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.tech-tag:hover {
  background: rgba(0, 194, 255, 0.14);
  border-color: rgba(0, 194, 255, 0.35);
}

/* AI Models grid */
.ai-models-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-md);
  margin-top: var(--gap-lg);
}

.ai-model-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: var(--gap-lg);
  transition: border-color var(--transition-fast);
}

.ai-model-item:hover {
  border-color: var(--border-hover);
}

.ai-model-item h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.ai-model-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ============================================================
   CLIENTS SECTION
   ============================================================ */
.clients {
  padding: var(--section-padding);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.clients-header {
  margin-bottom: var(--gap-2xl);
}

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

.client-category {
  padding: var(--gap-xl);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.client-category:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 4px 24px var(--accent-glow);
}

.client-category h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: var(--gap-sm);
  padding-bottom: var(--gap-sm);
  border-bottom: 2px solid var(--accent-primary);
  display: inline-block;
}

.client-category p {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.clients-note {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-style: italic;
  opacity: 0.8;
}

/* ============================================================
   COMPLIANCE SECTION
   ============================================================ */
.compliance {
  padding: var(--section-padding);
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(13, 26, 48, 0.4) 50%, var(--bg-primary) 100%);
}

.compliance-header {
  margin-bottom: var(--gap-2xl);
}

.compliance-content {
  max-width: 800px;
}

.compliance-block {
  margin-bottom: var(--gap-lg);
  padding: var(--gap-lg);
  background: rgba(17, 31, 58, 0.4);
  border-radius: var(--radius-md);
  border: 1px solid rgba(43, 127, 255, 0.08);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.compliance-block:hover {
  border-color: var(--card-border);
  background: rgba(17, 31, 58, 0.6);
}

.compliance-block h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: var(--gap-sm);
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
}

.compliance-block h3::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--accent-primary);
  border-radius: 2px;
  flex-shrink: 0;
}

.compliance-block p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  padding-left: 0;
  margin-top: var(--gap-sm);
}

/* ============================================================
   CONTACT SECTION
   ============================================================ */
.contact {
  padding: var(--section-padding);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.contact-header {
  margin-bottom: var(--gap-2xl);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-2xl);
  align-items: start;
}

.contact-info p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--gap-lg);
}

.contact-email {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent-secondary);
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}

.form-group input,
.form-group textarea {
  font-size: 0.95rem;
  color: var(--text-primary);
  background: rgba(17, 31, 58, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.form-group input:hover,
.form-group textarea:hover {
  background: rgba(20, 36, 66, 0.8);
  border-color: rgba(43, 127, 255, 0.3);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(26, 109, 255, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(136, 153, 187, 0.4);
}

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

.form-submit {
  margin-top: var(--gap-sm);
}

.form-submit .btn-primary {
  width: 100%;
  justify-content: center;
  border: none;
}

.form-note {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-style: italic;
  opacity: 0.7;
  margin-top: var(--gap-sm);
}

/* Thank you message */
.form-success {
  display: none;
  text-align: center;
  padding: var(--gap-2xl) var(--gap-xl);
}

.form-success.show {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--gap-md);
}

.form-success .success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(26, 109, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.form-success .success-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--accent-primary);
}

.form-success h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.3rem;
  color: var(--text-primary);
}

.form-success p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  padding: 60px 0 40px;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
}

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

.footer-logo img {
  height: 32px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.7;
}

.footer-nav {
  display: flex;
  gap: var(--gap-lg);
}

.footer-nav a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--gap-lg);
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-secondary);
  opacity: 0.7;
}

.footer-disclaimer {
  font-size: 0.7rem;
  color: var(--text-secondary);
  opacity: 0.5;
  max-width: 600px;
  line-height: 1.6;
  text-align: right;
}

.footer-portal {
  font-size: 0.8rem;
  color: var(--text-secondary);
  opacity: 0.6;
  transition: color var(--transition-fast), opacity var(--transition-fast);
  margin-top: var(--gap-sm);
}

.footer-portal:hover {
  color: var(--text-primary);
  opacity: 1;
}

/* ============================================================
   RESPONSIVE — TABLET (max-width: 1024px)
   ============================================================ */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px 0;
  }

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

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

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

  .about-visual {
    min-height: 320px;
  }

  .about-network {
    width: 340px;
    height: 340px;
  }

  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--gap-lg);
  }

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

  .footer-main {
    flex-direction: column;
    gap: var(--gap-lg);
    text-align: center;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .footer-disclaimer {
    text-align: center;
  }
}

/* ============================================================
   RESPONSIVE — MOBILE (max-width: 768px)
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --section-padding: 64px 0;
    --nav-height: 64px;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    flex-direction: column;
    background: rgba(8, 14, 30, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: var(--gap-xl) var(--gap-lg);
    gap: var(--gap-lg);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
    border-bottom: 1px solid var(--border-color);
    align-items: flex-start;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-toggle {
    display: flex;
  }

  .value-grid {
    grid-template-columns: 1fr;
    gap: var(--gap-lg);
  }

  .value-item {
    padding: var(--gap-lg);
  }

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

  .ai-models-grid {
    grid-template-columns: 1fr;
  }

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

  .tech-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .tech-tabs::-webkit-scrollbar {
    display: none;
  }

  .hero-headline {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .hero-subheadline {
    font-size: 1rem;
  }

  .hero-ctas {
    flex-direction: column;
    align-items: center;
  }

  .hero-ctas .btn-primary,
  .hero-ctas .btn-ghost {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .footer-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--gap-md);
  }
}

/* ============================================================
   RESPONSIVE — SMALL MOBILE (max-width: 480px)
   ============================================================ */
@media (max-width: 480px) {
  :root {
    --section-padding: 48px 0;
    --container-padding: 0 16px;
  }

  .section-title {
    font-size: clamp(1.6rem, 6vw, 2rem);
  }

  .service-card {
    padding: var(--gap-lg);
  }

  .about-network {
    width: 280px;
    height: 280px;
  }
}