/* ============================================
  IntelliSwine Design System
  Modern UI with Glassmorphism & Gradients
  ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Primary Palette */
  --primary-50: #f0fdf4;
  --primary-100: #dcfce7;
  --primary-200: #bbf7d0;
  --primary-300: #86efac;
  --primary-400: #4ade80;
  --primary-500: #22c55e;
  --primary-600: #16a34a;
  --primary-700: #15803d;
  --primary-800: #166534;
  --primary-900: #14532d;

  /* Accent */
  --accent-400: #fb923c;
  --accent-500: #f97316;
  --accent-600: #ea580c;

  /* Neutral */
  --neutral-50: #fafafa;
  --neutral-100: #f5f5f5;
  --neutral-200: #e5e5e5;
  --neutral-300: #d4d4d4;
  --neutral-400: #a3a3a3;
  --neutral-500: #737373;
  --neutral-600: #525252;
  --neutral-700: #404040;
  --neutral-800: #262626;
  --neutral-900: #171717;

  /* Semantic */
  --success: #22c55e;
  --warning: #eab308;
  --danger: #ef4444;
  --info: #3b82f6;

  /* Surface */
  --surface-primary: #ffffff;
  --surface-secondary: #f8fafc;
  --surface-glass: rgba(255, 255, 255, 0.72);
  --surface-glass-border: rgba(255, 255, 255, 0.24);
  --surface-dark: #0f172a;
  --surface-dark-secondary: #1e293b;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #16a34a 0%, #22c55e 50%, #4ade80 100%);
  --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 40%, #14532d 100%);
  --gradient-accent: linear-gradient(135deg, #f97316 0%, #fb923c 100%);
  --gradient-mesh: radial-gradient(at 40% 20%, rgba(34, 197, 94, 0.15) 0, transparent 50%),
                   radial-gradient(at 80% 0%, rgba(249, 115, 22, 0.1) 0, transparent 50%),
                   radial-gradient(at 0% 50%, rgba(59, 130, 246, 0.08) 0, transparent 50%);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Plus Jakarta Sans', var(--font-sans);
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* 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;

  /* Border Radius */
  --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, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 40px rgba(34, 197, 94, 0.15);
  --shadow-glow-accent: 0 0 40px rgba(249, 115, 22, 0.15);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --max-width: 1280px;
  --nav-height: 72px;
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--neutral-800);
  background: var(--surface-secondary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

/* ---------- Typography ---------- */
.text-display {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.text-h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.text-h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.text-h3 {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 600;
  line-height: 1.3;
}

.text-body {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--neutral-600);
}

.text-body-lg {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--neutral-500);
}

.text-caption {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--neutral-500);
}

.text-overline {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary-600);
}

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

.section {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-3xl);
}

.section-header .text-overline {
  margin-bottom: var(--space-sm);
  display: inline-block;
}

.section-header .text-h2 {
  margin-bottom: var(--space-md);
}

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1100;
  transition: all var(--transition-base);
}

.mobile-overlay {
  display: none;
}

.navbar.scrolled {
  background: var(--surface-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--surface-glass-border);
  box-shadow: var(--shadow-sm);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--neutral-900);
}

.nav-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.1rem;
  box-shadow: var(--shadow-glow);
}

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

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--neutral-600);
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-600);
}

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

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

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.65rem 1.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 50px rgba(34, 197, 94, 0.25);
}

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

.btn-secondary {
  background: var(--surface-primary);
  color: var(--neutral-800);
  border: 1.5px solid var(--neutral-200);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--primary-300);
  background: var(--primary-50);
  color: var(--primary-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  color: var(--neutral-600);
  padding: 0.5rem 1rem;
}

.btn-ghost:hover {
  color: var(--primary-600);
  background: var(--primary-50);
}

.btn-accent {
  background: var(--gradient-accent);
  color: white;
  box-shadow: var(--shadow-md), var(--shadow-glow-accent);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 50px rgba(249, 115, 22, 0.25);
}

.btn-lg {
  padding: 0.85rem 2rem;
  font-size: 1rem;
  border-radius: var(--radius-xl);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.8rem;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* ---------- Cards ---------- */
.card {
  background: var(--surface-primary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--neutral-200);
  transition: all var(--transition-base);
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
  border-color: var(--primary-200);
}

.card-glass {
  background: var(--surface-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-xl);
}

.card-dark {
  background: var(--surface-dark-secondary);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-xl);
  color: white;
}

/* ---------- Badge / Chip ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.3rem 0.85rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--primary-50);
  color: var(--primary-700);
  border: 1px solid var(--primary-200);
}

.badge-accent {
  background: rgba(249, 115, 22, 0.08);
  color: var(--accent-600);
  border-color: rgba(249, 115, 22, 0.2);
}

.badge-dark {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.8);
  border-color: rgba(255, 255, 255, 0.12);
}

.badge-dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ---------- Input Fields ---------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--neutral-700);
}

.form-input {
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  background: var(--surface-primary);
  color: var(--neutral-800);
  transition: all var(--transition-fast);
  width: 100%;
  box-sizing: border-box;
}

.form-input:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.12);
}

.form-input::placeholder {
  color: var(--neutral-400);
}

.form-input-icon {
  position: relative;
}

.form-input-icon .form-input {
  padding-left: 2.75rem;
}

.form-input-icon .input-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--neutral-400);
  font-size: 1.1rem;
  pointer-events: none;
}

/* ---------- Divider ---------- */
.divider {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  color: var(--neutral-400);
  font-size: 0.8rem;
  margin: var(--space-lg) 0;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--neutral-200);
}

/* ---------- Toggle / Switch ---------- */
.toggle-switch {
  position: relative;
  width: 48px;
  height: 26px;
}

.toggle-switch input {
  display: none;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--neutral-300);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  transition: transform var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--primary-500);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(22px);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--surface-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-4xl) 0 var(--space-xl);
}

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

.footer-brand {
  max-width: 320px;
}

.footer-brand .nav-logo {
  color: white;
  margin-bottom: var(--space-md);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.5);
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-lg);
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--primary-400);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.35);
}

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.4);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--primary-600);
  color: white;
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }

/* ---------- Hamburger / Mobile Menu ---------- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  z-index: 10;
  position: relative;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--neutral-700);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.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);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(300px, 85vw);
    height: 100vh;
    background: var(--surface-primary);
    flex-direction: column;
    padding: calc(var(--nav-height) + 60px + var(--space-xl)) var(--space-xl) var(--space-xl);
    box-shadow: var(--shadow-2xl);
    transition: right var(--transition-slow);
    z-index: 2;
    gap: var(--space-sm);
    align-items: flex-start;
    overflow-y: auto;
  }

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

  .nav-links a {
    font-size: 1.05rem;
    padding: var(--space-sm) 0;
    width: 100%;
  }

  .nav-actions {
    position: fixed;
    top: var(--nav-height);
    right: -100%;
    width: min(300px, 85vw);
    height: auto;
    flex-direction: row;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-xl);
    background: var(--surface-primary);
    border-bottom: 1px solid var(--neutral-200);
    transition: right var(--transition-slow);
    z-index: 3;
  }

  .nav-actions.open {
    right: 0;
  }

  .nav-actions .btn {
    flex: 1;
    text-align: center;
  }

  .mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
    backdrop-filter: blur(4px);
  }

  .mobile-overlay.active {
    display: block;
  }

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

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

@media (max-width: 480px) {
  :root {
    --space-lg: 1rem;
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 2.5rem;
    --space-4xl: 3.5rem;
  }
}

/* ---------- Utility Classes ---------- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-4,
  .grid-3,
  .grid-2 { grid-template-columns: 1fr; }
}

.mx-auto { margin-left: auto; margin-right: auto; }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.w-full { width: 100%; }
.relative { position: relative; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}