/* ============================================================
   RetailHub Pro - Design System v2
   Bold • Futuristic • Technical
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: 'Geist', system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  color: var(--text-body);
  line-height: 1.6;
  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, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* --- Design Tokens --- */
:root {
  /* Surfaces */
  --bg: #fafafa;
  --bg-alt: #f4f4f5;
  --bg-dark: #09090b;
  --bg-dark-alt: #18181b;
  --surface: #ffffff;
  --surface-dark: #1c1c1f;
  --surface-dark-hover: #27272a;

  /* Text */
  --text-primary: #09090b;
  --text-body: #3f3f46;
  --text-muted: #71717a;
  --text-faint: #a1a1aa;
  --text-on-dark: #fafafa;
  --text-body-dark: #d4d4d8;
  --text-muted-dark: #a1a1aa;

  /* Accent - Monochrome */
  --accent: #000000;
  --accent-light: #3f3f46;
  --accent-dark: #000000;
  --accent-ultra: #09090b;
  --accent-bg: rgba(0, 0, 0, 0.04);
  --accent-bg-strong: rgba(0, 0, 0, 0.08);

  /* Secondary */
  --cyan: #3f3f46;
  --cyan-light: #52525b;
  --cyan-bg: rgba(0, 0, 0, 0.04);

  /* Tertiary */
  --lime: #3f3f46;
  --lime-bg: rgba(0, 0, 0, 0.04);

  /* Danger */
  --red: #09090b;
  --red-bg: rgba(0, 0, 0, 0.04);

  /* Borders */
  --border: #e4e4e7;
  --border-strong: #d4d4d8;
  --border-dark: #27272a;
  --border-dark-strong: #3f3f46;

  /* Gradient */
  --gradient-accent: linear-gradient(135deg, #27272a, #000000);
  --gradient-line: linear-gradient(90deg, #e4e4e7, #71717a);
  --gradient-mesh: radial-gradient(ellipse at 20% 50%, rgba(0,0,0,0.03) 0%, transparent 50%),
                    radial-gradient(ellipse at 80% 20%, rgba(0,0,0,0.02) 0%, transparent 50%);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Typography */
  --font-body: 'Geist', system-ui, -apple-system, sans-serif;
  --font-heading: 'Geist', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: clamp(2.5rem, 1.5rem + 4vw, 4rem);
  --text-6xl: clamp(3rem, 2rem + 5vw, 5rem);

  /* Radii */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);
  --shadow-xl: 0 24px 48px rgba(0,0,0,0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Container */
  --container-max: 1200px;
  --container-wide: 1400px;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--wide {
  max-width: var(--container-wide);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  line-height: 1.15;
  text-wrap: balance;
  font-weight: 800;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-6xl); }
h2 { font-size: var(--text-5xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }

p {
  text-wrap: pretty;
  max-width: 65ch;
}

/* Section labels - technical monospace */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-4);
  padding: var(--space-1) var(--space-3);
  background: var(--accent-bg);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.section-label::before {
  content: "//";
  opacity: 0.5;
}

.section-title {
  margin-bottom: var(--space-6);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.7;
}

/* Dark section overrides */
.dark-section h1,
.dark-section h2,
.dark-section h3,
.dark-section h4,
.dark-section h5 {
  color: var(--text-on-dark);
}

.dark-section p,
.dark-section .section-subtitle {
  color: var(--text-body-dark);
}

.dark-section .section-label {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text-on-dark);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.btn-primary {
  background: var(--accent);
  color: var(--text-on-dark);
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-strong);
}

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

.dark-section .btn-ghost {
  color: var(--text-on-dark);
  border-color: var(--border-dark-strong);
}

.dark-section .btn-ghost:hover {
  border-color: var(--accent-light);
  color: var(--accent-light);
}

.btn-lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-base);
  border-radius: var(--radius-xl);
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-4) 0;
  transition: all var(--transition-base);
  background: transparent;
}

.header.scrolled {
  background: rgba(250, 250, 250, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon img,
.logo-icon svg {
  width: 100%;
  height: 100%;
}

.logo span {
  color: var(--text-muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: center;
}

.nav-links a {
  position: relative;
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.lang-toggle {
  display: flex;
  align-items: center;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 2px;
  font-size: var(--text-xs);
  font-weight: 600;
}

.lang-toggle button {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.lang-toggle button.active {
  background: var(--accent);
  color: white;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
  border-radius: 2px;
}

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

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

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

/* --- Sections --- */
section {
  padding: var(--space-24) 0;
  position: relative;
}

/* --- HERO --- */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: var(--space-16);
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

/* Geometric background - grid + gradient mesh */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg .orb {
  display: none; /* Remove blurry orbs - replaced by geometric mesh */
}

.hero-bg .grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.5;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 20%, transparent 70%);
}

/* Gradient mesh overlay */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-mesh);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--accent-bg);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent);
  font-weight: 500;
  margin-bottom: var(--space-8);
  letter-spacing: 0.05em;
}

.hero-badge svg {
  width: 14px;
  height: 14px;
}

.hero h1 {
  margin-bottom: var(--space-6);
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--text-muted);
  margin-bottom: var(--space-10);
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--space-10);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
}

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

.hero-stat-value {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.hero-stat-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

/* Dashboard mockup */
.hero-visual {
  position: relative;
}

.dashboard-mockup {
  width: 100%;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
  overflow: hidden;
  transform: perspective(1200px) rotateY(-6deg) rotateX(3deg);
  transition: transform var(--transition-slow);
  background: var(--bg-dark);
}

.dashboard-mockup:hover {
  transform: perspective(1200px) rotateY(-2deg) rotateX(1deg);
}

.dashboard-mockup img {
  width: 100%;
  display: block;
}

.dashboard-glow {
  position: absolute;
  inset: -30%;
  background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.05), transparent 60%);
  z-index: -1;
  pointer-events: none;
}

/* --- PROBLEM (dark section) --- */
.problem {
  background: var(--bg-dark);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.problem-card {
  padding: var(--space-8);
  background: var(--surface-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.problem-card:hover {
  background: var(--surface-dark-hover);
  border-color: var(--border-dark-strong);
  transform: translateY(-4px);
}

.problem-card-icon {
  width: 96px;
  height: 96px;
  background: #ffffff;
  border-radius: 20px;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.problem-card-icon svg {
  width: 22px;
  height: 22px;
}

.problem-card h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
  color: var(--text-on-dark);
  font-weight: 700;
}

.problem-card p {
  font-size: var(--text-sm);
  color: var(--text-muted-dark);
  line-height: 1.6;
}

/* --- SOLUTION (light) --- */
.solution {
  background: var(--bg);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-12);
}

.solution-item {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
}

.solution-icon {
  width: 96px;
  height: 96px;
  min-width: 96px;
  background: #ffffff;
  border-radius: 20px;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.solution-icon svg {
  width: 22px;
  height: 22px;
}

.solution-item h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
  font-weight: 700;
}

.solution-item p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- MODULES (light alt bg) --- */
.modules {
  background: var(--bg-alt);
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-12);
}

.module-card {
  padding: var(--space-8);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

/* Gradient top border on hover */
.module-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-line);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: left;
}

.module-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

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

.module-card-icon {
  width: 96px;
  height: 96px;
  background: #ffffff;
  border-radius: 20px;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.module-card h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
  font-weight: 700;
}

.module-card p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- BENTO GRID --- */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.bento-cell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 280px;
  position: relative;
  overflow: hidden;
}

.bento-hero {
  grid-column: span 2;
  grid-row: span 2;
  padding: 0;
}

.bento-hero .bento-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-8);
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
}

.bento-hero h4, .bento-hero p {
  color: var(--text-on-dark);
}

.bento-wide {
  grid-column: span 2;
}

@media (max-width: 768px) {
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .bento-hero, .bento-wide {
    grid-column: span 1;
  }
}

/* --- USE CASES (dark section) --- */
.usecases {
  background: var(--bg-dark);
}

.usecases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-12);
}

.usecase-card {
  padding: var(--space-8);
  background: var(--surface-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
}

.usecase-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
  background: var(--surface-dark-hover);
}

.usecase-icon {
  width: 96px;
  height: 96px;
  min-width: 96px;
  background: #ffffff;
  border-radius: 20px;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.usecase-card h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
  color: var(--text-on-dark);
  font-weight: 700;
}

.usecase-card p {
  font-size: var(--text-sm);
  color: var(--text-muted-dark);
  line-height: 1.6;
}

/* --- AI SECTION (light with mesh bg) --- */
.ai-section {
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.ai-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-mesh);
  pointer-events: none;
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-12);
  position: relative;
}

.ai-card {
  padding: var(--space-6) var(--space-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  text-align: center;
}

.ai-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.2);
}

.ai-card-icon {
  width: 96px;
  height: 96px;
  background: #ffffff;
  border-radius: 20px;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
}

.ai-card h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
  font-weight: 700;
}

.ai-card p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- BENEFITS (light alt) --- */
.benefits {
  background: var(--bg-alt);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-12);
}

.benefit-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  transition: background var(--transition-base);
}

.benefit-item:hover {
  background: var(--surface);
}

.benefit-check {
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: var(--radius-full);
  background: rgba(22, 163, 74, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #16a34a;
  margin-top: 2px;
}

.benefit-check svg {
  width: 14px;
  height: 14px;
}

.benefit-item h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
  font-weight: 700;
}

.benefit-item p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- CLIENTS (dark section) --- */
.clients {
  background: var(--bg-dark);
}

.clients-grid {
  margin-top: var(--space-12);
  max-width: 800px;
}

.client-card {
  padding: var(--space-10);
  background: var(--surface-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-2xl);
  position: relative;
  overflow: hidden;
}

.client-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-line);
}

.client-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.client-logo {
  width: 56px;
  height: 56px;
  min-width: 56px;
  border-radius: var(--radius-xl);
  background: var(--accent-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-light);
}

.client-logo svg {
  width: 28px;
  height: 28px;
}

.client-name {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--text-on-dark);
  margin-bottom: var(--space-1);
}

.client-segment {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--accent-light);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 500;
}

.client-desc {
  font-size: var(--text-base);
  color: var(--text-body-dark);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: none;
}

.client-stats {
  display: flex;
  gap: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-dark);
}

.client-stat {
  text-align: left;
}

.client-stat-value {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--text-on-dark);
  letter-spacing: -0.02em;
}

.client-stat-label {
  font-size: var(--text-sm);
  color: var(--text-muted-dark);
  margin-top: var(--space-1);
}

/* --- ARCHITECTURE (dark section) --- */
.architecture {
  background: var(--bg-dark);
}

.architecture-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-12);
  margin-top: var(--space-16);
  position: relative;
  padding: var(--space-12) 0;
}

.arch-network-bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  background-image: radial-gradient(circle at center, rgba(99, 102, 241, 0.1) 0%, transparent 60%);
  z-index: 0;
}

.arch-network-bg::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 100vw; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.3), transparent);
}
.arch-network-bg::before {
  content: "";
  position: absolute;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 1px; height: 100%;
  background: linear-gradient(180deg, transparent, rgba(99, 102, 241, 0.3), transparent);
}

.arch-core-wrapper {
  position: relative;
  z-index: 10;
}

.arch-hub {
  width: 160px;
  height: 160px;
  background: var(--surface-dark);
  border: 1px solid var(--border-dark-strong);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--text-on-dark);
  box-shadow: 0 0 50px rgba(99, 102, 241, 0.3), inset 0 0 20px rgba(99, 102, 241, 0.2);
  position: relative;
}

.arch-hub::before {
  content: "";
  position: absolute;
  inset: -24px;
  border-radius: var(--radius-full);
  border: 1px dashed var(--accent);
  opacity: 0.4;
  animation: spin 30s linear infinite;
}

.arch-hub::after {
  content: "";
  position: absolute;
  inset: -48px;
  border-radius: var(--radius-full);
  border: 1px dashed var(--accent-light);
  opacity: 0.15;
  animation: spin 45s linear infinite reverse;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.arch-modules-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4) var(--space-6);
  max-width: 900px;
  position: relative;
  z-index: 5;
}

.arch-module-node {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-on-dark);
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.arch-module-node::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.arch-module-node:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
  color: white;
}

.arch-module-node:hover::before {
  opacity: 1;
}

.arch-description {
  text-align: center;
  margin-top: var(--space-8);
  font-size: var(--text-lg);
  color: var(--text-muted-dark);
  max-width: 650px;
  margin-inline: auto;
  line-height: 1.7;
  position: relative;
  z-index: 5;
}

/* --- CTA (gradient section) --- */
.cta-section {
  background: var(--gradient-accent);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(255,255,255,0.06) 0%, transparent 50%);
}

/* Geometric pattern overlay */
.cta-section::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  margin-bottom: var(--space-6);
  color: white;
}

.cta-section p {
  font-size: var(--text-xl);
  color: rgba(255,255,255,0.85);
  margin: 0 auto var(--space-10);
  max-width: 550px;
}

.cta-section .btn-primary {
  background: white;
  color: var(--accent-dark);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  font-weight: 700;
}

.cta-section .btn-primary:hover {
  background: var(--gray-50, #f8fafc);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

/* --- FOOTER --- */
.footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border-dark);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer .logo {
  color: var(--text-on-dark);
}

.footer-brand p {
  color: var(--text-muted-dark);
  font-size: var(--text-sm);
  margin-top: var(--space-4);
  max-width: 300px;
}

.footer-col h5 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-faint);
  margin-bottom: var(--space-5);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-col a {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-muted-dark);
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--accent-light);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--text-muted-dark);
}

/* --- CONTACT MODAL --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(9, 9, 11, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: var(--space-6);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  max-width: 520px;
  width: 100%;
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition-slow);
  position: relative;
  box-shadow: var(--shadow-xl);
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  border: 1px solid var(--border);
}

.modal-close:hover {
  background: var(--border);
  color: var(--text-primary);
}

.modal h3 {
  margin-bottom: var(--space-2);
}

.modal-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-8);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast);
  outline: none;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-submit {
  width: 100%;
  margin-top: var(--space-4);
}

.form-success {
  display: none;
  text-align: center;
  padding: var(--space-10) 0;
}

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

.form-success-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
  color: white;
}

.form-success h4 { margin-bottom: var(--space-3); }

.form-success p {
  color: var(--text-muted);
  margin-inline: auto;
}

/* === ANIMATIONS === */
/* Hide mobile nav on desktop */
.mobile-nav {
  display: none;
}

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal.visible {
  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; }

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .dashboard-mockup,
  .dashboard-mockup:hover {
    transform: none;
  }

  .arch-hub::after, .arch-hub::before {
    animation: none;
  }

  * {
    transition-duration: 0.01ms !important;
  }
}

/* --- FLOATING DOT NAVIGATION --- */
.floating-nav {
  position: fixed;
  top: 50%;
  right: var(--space-6);
  transform: translateY(-50%);
  z-index: 999;
}

.floating-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
}

.floating-nav .nav-dot {
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--text-muted);
  background: transparent;
  transition: all var(--transition-base);
  position: relative;
}

.floating-nav .nav-dot:hover {
  border-color: var(--accent);
  transform: scale(1.2);
}

.floating-nav .nav-dot.active {
  background: var(--accent);
  border-color: var(--accent);
  transform: scale(1.3);
}

/* Tooltip on hover */
.floating-nav .nav-dot::before {
  content: attr(title);
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%) translateX(10px);
  background: var(--surface-dark);
  color: var(--text-on-dark);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.floating-nav .nav-dot:hover::before {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

@media (max-width: 1024px) {
  .floating-nav {
    display: none;
  }
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .hero-content {
    text-align: center;
    margin-inline: auto;
  }

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

  .dashboard-mockup {
    transform: perspective(1200px) rotateY(0deg) rotateX(3deg);
    max-width: 600px;
    margin-inline: auto;
  }

  .dashboard-mockup:hover {
    transform: perspective(1200px) rotateY(0deg) rotateX(1deg);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 768px) {
  section {
    padding: var(--space-16) 0;
  }

  .nav-links { display: none; }
  .nav-actions .btn { display: none; }

  .mobile-menu-btn {
    display: flex;
  }

  .mobile-nav {
    display: block;
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 360px;
    height: 100dvh;
    background: var(--surface);
    border-left: 1px solid var(--border);
    z-index: 999;
    padding: 100px var(--space-8) var(--space-8);
    transition: right var(--transition-base);
    overflow-y: auto;
  }

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

  .mobile-nav a {
    display: block;
    padding: var(--space-4) 0;
    font-size: var(--text-lg);
    color: var(--text-body);
    border-bottom: 1px solid var(--border);
    transition: color var(--transition-fast);
  }

  .mobile-nav a:hover {
    color: var(--accent);
  }

  .mobile-nav .btn {
    display: flex;
    width: 100%;
    margin-top: var(--space-6);
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-4);
    align-items: center;
  }

  .hero h1 {
    font-size: clamp(2rem, 1.2rem + 4vw, 3.5rem);
  }

  .hero-subtitle {
    font-size: var(--text-lg);
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding-inline: var(--space-4);
  }

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

  .hero-ctas .btn { text-align: center; }

  .problem-grid,
  .modules-grid,
  .usecases-grid,
  .ai-grid,
  .benefits-grid,
  .solution-grid {
    grid-template-columns: 1fr;
  }

  .arch-modules-grid {
    flex-direction: column;
    align-items: center;
  }
}