/* Picsera AI Automation Agency - Modern Minimalism Premium Design System */

:root {
  /* Color System */
  --color-primary-50: #E6F0FF;
  --color-primary-100: #CCE0FF;
  --color-primary-500: #0066FF;
  --color-primary-600: #0052CC;
  --color-primary-900: #003D99;
  
  --color-neutral-50: #FAFAFA;
  --color-neutral-100: #F5F5F5;
  --color-neutral-200: #E5E5E5;
  --color-neutral-500: #A3A3A3;
  --color-neutral-700: #404040;
  --color-neutral-900: #171717;
  
  --color-semantic-success: #10B981;
  --color-semantic-warning: #F59E0B;
  --color-semantic-error: #EF4444;
  
  --color-bg-page: #FAFAFA;
  --color-bg-surface: #F5F5F5;
  --color-bg-elevated: #FFFFFF;
  
  /* Typography */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  --text-hero: 64px;
  --text-title: 48px;
  --text-subtitle: 32px;
  --text-large: 20px;
  --text-body: 16px;
  --text-small: 14px;
  --text-caption: 12px;
  
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.1;
  --line-height-heading: 1.3;
  --line-height-body: 1.6;
  
  --letter-spacing-tight: -0.02em;
  --letter-spacing-slight: -0.01em;
  --letter-spacing-normal: 0;
  
  /* Spacing (8-Point Grid) */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 96px;
  --space-4xl: 128px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-card: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-card-hover: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --shadow-modal: 0 20px 25px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.04);
  
  /* Animation */
  --duration-fast: 200ms;
  --duration-base: 250ms;
  --duration-slow: 300ms;
  --easing-default: ease-out;
  --easing-smooth: ease-in-out;
  
  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--text-body);
  line-height: var(--line-height-body);
  color: var(--color-neutral-900);
  background-color: var(--color-bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography Hierarchy */
h1 {
  font-size: var(--text-hero);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-neutral-900);
}

h2 {
  font-size: var(--text-title);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-heading);
  letter-spacing: var(--letter-spacing-slight);
  color: var(--color-neutral-900);
}

h3 {
  font-size: var(--text-subtitle);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-heading);
  color: var(--color-neutral-900);
}

h4 {
  font-size: var(--text-large);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-heading);
  color: var(--color-neutral-900);
}

p {
  color: var(--color-neutral-700);
  line-height: var(--line-height-body);
}

/* Container and Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  background-color: var(--color-bg-elevated);
  box-shadow: none;
  transition: box-shadow var(--duration-base) var(--easing-default);
  z-index: 1000;
  height: 80px;
  display: flex;
  align-items: center;
}

.navbar.scrolled {
  box-shadow: var(--shadow-card);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-xl);
}

.nav-link {
  color: var(--color-neutral-700);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: var(--text-body);
  transition: color var(--duration-fast) var(--easing-default);
}

.nav-link:hover {
  color: var(--color-primary-500);
}

.nav-cta {
  background-color: var(--color-primary-500);
  color: white;
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-body);
  cursor: pointer;
  transition: all var(--duration-fast) var(--easing-default);
}

.nav-cta:hover {
  background-color: var(--color-primary-600);
  transform: translateY(-2px) scale(1.02);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--color-neutral-900);
  transition: var(--duration-fast) var(--easing-default);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-body);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--easing-default);
  min-height: 48px;
}

.btn-primary {
  background-color: var(--color-primary-500);
  color: white;
}

.btn-primary:hover {
  background-color: var(--color-primary-600);
  transform: translateY(-2px) scale(1.02);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-neutral-700);
  border: 2px solid var(--color-neutral-200);
}

.btn-secondary:hover {
  background-color: var(--color-neutral-50);
  border-color: var(--color-neutral-300);
}

.btn-large {
  padding: var(--space-md) var(--space-2xl);
  font-size: var(--text-large);
  min-height: 56px;
}

/* Hero Section */
.hero {
  padding: var(--space-4xl) 0;
  text-align: center;
  background-color: var(--color-bg-elevated);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  margin-bottom: var(--space-lg);
}

.hero p {
  font-size: var(--text-large);
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

/* Page Header (200px) */
.page-header {
  padding: var(--space-2xl) 0;
  text-align: center;
  background-color: var(--color-bg-elevated);
}

.page-header h1 {
  margin-bottom: var(--space-md);
}

.page-header p {
  font-size: var(--text-large);
  max-width: 600px;
  margin: 0 auto;
}

/* Cards */
.card {
  background-color: var(--color-bg-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  transition: all var(--duration-base) var(--easing-default);
}

.card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-card-hover);
}

.card-elevated {
  background-color: var(--color-bg-elevated);
}

.card-feature {
  text-align: center;
}

.card-feature h3 {
  margin-bottom: var(--space-md);
}

.card-feature p {
  margin-bottom: var(--space-lg);
}

/* Grid Systems */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-1 { grid-template-columns: 1fr; }
.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: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

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

.section-header p {
  font-size: var(--text-large);
  max-width: 600px;
  margin: 0 auto;
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-3xl) 0;
}

.stat-card {
  text-align: center;
  padding: var(--space-xl);
  background-color: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.stat-number {
  font-size: var(--text-title);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-500);
  display: block;
  margin-bottom: var(--space-sm);
}

.stat-label {
  font-size: var(--text-small);
  color: var(--color-neutral-700);
  font-weight: var(--font-weight-medium);
}

/* Pricing Cards */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin: var(--space-3xl) 0;
}

@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

.pricing-card {
  background-color: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-card);
  position: relative;
  transition: all var(--duration-base) var(--easing-default);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.pricing-card.featured {
  border: 2px solid var(--color-primary-500);
  transform: scale(1.05);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-4px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary-500);
  color: white;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--text-small);
  font-weight: var(--font-weight-semibold);
}

.pricing-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.pricing-title {
  font-size: var(--text-subtitle);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-sm);
}

.pricing-price {
  font-size: var(--text-title);
  font-weight: var(--font-weight-bold);
  color: var(--color-neutral-900);
}

.pricing-period {
  font-size: var(--text-body);
  color: var(--color-neutral-700);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--space-xl);
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-neutral-200);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.check-icon {
  color: var(--color-semantic-success);
  font-weight: bold;
}

/* Forms */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-neutral-900);
}

.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  font-size: var(--text-body);
  font-family: var(--font-family-primary);
  transition: border-color var(--duration-fast) var(--easing-default);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 2px rgba(0, 102, 255, 0.2);
}

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

/* Footer */
.footer {
  background-color: var(--color-neutral-900);
  color: white;
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2xl);
  margin-bottom: var(--space-xl);
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

.footer-section h4 {
  color: white;
  margin-bottom: var(--space-lg);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--space-sm);
}

.footer-section ul li a {
  color: var(--color-neutral-200);
  text-decoration: none;
  transition: color var(--duration-fast) var(--easing-default);
}

.footer-section ul li a:hover {
  color: var(--color-primary-500);
}

.footer-bottom {
  border-top: 1px solid var(--color-neutral-700);
  padding-top: var(--space-xl);
  text-align: center;
  color: var(--color-neutral-500);
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --text-hero: 40px;
    --text-title: 32px;
    --text-subtitle: 24px;
  }
  
  .hero {
    padding: var(--space-2xl) 0;
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .nav-links {
    display: none;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp var(--duration-slow) var(--easing-default);
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print Styles */
@media print {
  .navbar,
  .footer {
    display: none;
  }
  
  body {
    background-color: white;
    color: black;
  }
}