/* ============================================
   VERSATILIS AI — Design System & Styles
   ============================================ */

/* --- Design Tokens --- */
:root {
  /* Colors */
  --bg-primary: #0a0f1c;
  --bg-secondary: #111827;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --bg-glass: rgba(10, 15, 28, 0.75);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(59, 130, 246, 0.3);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-blue: #3b82f6;
  --accent-violet: #8b5cf6;
  --accent-blue-light: #60a5fa;
  --accent-gradient: linear-gradient(135deg, var(--accent-blue), var(--accent-violet));

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;

  /* Effects */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.15);
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.8);
  --border-subtle: #e2e8f0;
  --border-glow: rgba(59, 130, 246, 0.4);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --shadow-glow: 0 4px 20px rgba(59, 130, 246, 0.1);
}



/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base);
  /* Smooth theme transition */
}


html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

ul,
ol {
  list-style: none;
}

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


/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-5xl) 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-blue-light);
  margin-bottom: var(--space-lg);
}

.section-label::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-gradient);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

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

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

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  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;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border-subtle);
}

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

.nav-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-logo img {
  height: 32px;
  width: auto;
  display: block;
  flex-shrink: 0;
  filter: brightness(1.1);
}

[data-theme="light"] .nav-logo img {
  filter: brightness(0.7);
}

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


.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}

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

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 1px;
  transition: width var(--transition-base);
}

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

.nav-cta {
  font-size: var(--font-size-sm) !important;
  font-weight: 500 !important;
  color: var(--text-primary) !important;
  padding: var(--space-sm) var(--space-lg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast), background var(--transition-fast) !important;
}

.nav-cta:hover {
  border-color: var(--accent-blue);
  background: rgba(59, 130, 246, 0.1);
}

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

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  line-height: 0;
  transition: all var(--transition-fast);
}

.theme-toggle svg {
  display: block;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
}

.theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--text-primary);
  background: var(--bg-card-hover);
}

/* Mobile menu button */

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

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

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

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

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


/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
  animation: float-orb 20s ease-in-out infinite;
}

.hero-bg::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
  animation: float-orb 25s ease-in-out infinite reverse;
}

@keyframes float-orb {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(30px, -40px) scale(1.05);
  }

  66% {
    transform: translate(-20px, 20px) scale(0.95);
  }
}

/* Grid overlay */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

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

.hero-content {
  max-width: 750px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.4;
  }
}

.hero-title {
  font-size: var(--font-size-6xl);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-xl);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 580px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  background: var(--accent-gradient);
  color: white;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-base);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 500;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  text-decoration: none;
}

.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

/* Hero stats strip */
.hero-stats {
  display: flex;
  gap: var(--space-3xl);
  margin-top: var(--space-4xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--border-subtle);
}

.hero-stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-top: 2px;
}


/* ============================================
   SERVICES
   ============================================ */
.services {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-3xl);
}

.service-card {
  padding: var(--space-2xl);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: background var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-4px);
}

.service-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient);
  margin-bottom: var(--space-lg);
}

.service-icon svg {
  width: 24px;
  height: 24px;
  stroke: white;
  stroke-width: 2;
  fill: none;
}

.service-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

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


/* ============================================
   WHY US
   ============================================ */
.why-us-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-3xl);
}

.why-card {
  padding: var(--space-2xl);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-base);
}

.why-card:hover {
  border-color: var(--border-glow);
}

.why-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.why-card:hover::before {
  opacity: 1;
}

.why-number {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: rgba(255, 255, 255, 0.04);
  line-height: 1;
  margin-bottom: var(--space-md);
}

.why-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.why-card p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.8;
}


/* ============================================
   PROCESS
   ============================================ */
.process {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-3xl);
  position: relative;
}

/* Arrow connectors between steps */

.process-step {
  text-align: center;
  position: relative;
}

.process-step:not(:last-child)::after {
  content: '→';
  position: absolute;
  top: 40px;
  right: calc(-1 * var(--space-xl) / 2);
  transform: translate(50%, -50%);
  font-size: var(--font-size-2xl);
  color: var(--accent-blue-light);
  line-height: 1;
  z-index: 1;
}

.step-number {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid var(--border-subtle);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--accent-blue-light);
  position: relative;
  z-index: 1;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.process-step:hover .step-number {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow);
}

.process-step h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.process-step p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 300px;
  margin: 0;
}


/* ============================================
   CONTACT / CTA
   ============================================ */
.contact {
  text-align: left;
}

.contact .section-subtitle {
  margin-bottom: var(--space-2xl);
}

.contact-card {
  max-width: 640px;
  margin: var(--space-3xl) 0 0;
  padding: var(--space-3xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.form-group {
  text-align: left;
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  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-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

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

.contact-form .btn-primary {
  width: 100%;
  justify-content: center;
  margin-top: var(--space-sm);
}

.contact-alt {
  margin-top: var(--space-xl);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.contact-alt a {
  color: var(--accent-blue-light);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.contact-alt a:hover {
  color: var(--accent-blue);
}


/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border-subtle);
}

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

.footer-copy {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-xl);
}

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

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


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

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .container {
    padding: 0 var(--space-lg);
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  /* Nav mobile */
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    inset: 0;
    top: var(--nav-height);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: var(--space-3xl);
    gap: var(--space-xl);
    background: var(--bg-primary);
    transform: translateX(100%);
    transition: transform var(--transition-base);
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-links a {
    font-size: var(--font-size-lg);
  }

  /* Hero mobile */
  .hero-title {
    font-size: var(--font-size-4xl);
  }

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

  .hero-stats {
    flex-direction: column;
    gap: var(--space-xl);
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Grids to single column */
  .services-grid,
  .why-us-grid,
  .process-steps {
    grid-template-columns: 1fr;
  }

  .process-steps::before {
    display: none;
  }

  .section-title {
    font-size: var(--font-size-3xl);
  }

  /* Form */
  .form-row {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer .container {
    flex-direction: column;
    gap: var(--space-md);
    text-align: left;
    align-items: flex-start;
  }
}