/* Mo-Theory Website - Main Stylesheet */

:root {
  /* Color Palette */
  --primary-dark: #0a1929;
  --primary: #0d2b4b;
  --primary-light: #1a4a7c;
  --accent: #7e57c2;
  --accent-light: #b085f5;
  --text-light: #ffffff;
  --text-dark: #333333;
  --text-muted: #6c757d;
  --background: #f8f9fa;
  --card-bg: #ffffff;
  --border-color: #dee2e6;
  
  /* Gradients */
  --cosmic-gradient: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  --accent-gradient: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Typography */
  --font-primary: 'Roboto', sans-serif;
  --font-heading: 'Playfair Display', serif;
  --font-mono: 'Roboto Mono', monospace;
  
  /* Borders */
  --border-radius-sm: 0.25rem;
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--background);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
  color: var(--primary);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2rem;
  position: relative;
  padding-bottom: var(--spacing-md);
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--accent);
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-md);
}

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

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

ul, ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

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

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Header */
.header {
  background: var(--cosmic-gradient);
  color: var(--text-light);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--text-light);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo:hover {
  color: var(--text-light);
}

.logo-text {
  white-space: nowrap;
}

.logo-icon {
  width: 40px;
  height: 40px;
  margin-right: var(--spacing-sm);
  background: var(--accent-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Navigation */
.nav {
  display: flex;
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin-left: var(--spacing-lg);
}

.nav-link {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: var(--transition-fast);
}

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

.nav-link:hover {
  color: var(--text-light);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  background: var(--cosmic-gradient);
  color: var(--text-light);
  padding: var(--spacing-xxl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('../images/cosmic-background.svg');
  background-size: cover;
  opacity: 0.1;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-light);
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xl);
  font-weight: 300;
}

.hero-cta {
  display: inline-block;
  background: var(--accent-gradient);
  color: var(--text-light);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.hero-cta:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  color: var(--text-light);
}

/* Section Styling */
.section {
  padding: var(--spacing-xxl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-title h2 {
  display: inline-block;
}

.section-title h2::after {
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-title {
  color: var(--primary);
  margin-bottom: var(--spacing-md);
}

.card-content {
  color: var(--text-dark);
}

/* Grid Layout */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

/* Concept Cards */
.concept-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: var(--spacing-lg);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.concept-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.concept-card-title {
  color: var(--primary);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.concept-card-content {
  flex-grow: 1;
}

/* Equations */
.equation {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  text-align: center;
  overflow-x: auto;
  box-shadow: var(--shadow);
}

.equation-variables {
  margin-top: var(--spacing-md);
  text-align: left;
}

.equation-variables h4 {
  margin-bottom: var(--spacing-sm);
}

.equation-variables ul {
  list-style-type: none;
  padding-left: 0;
  columns: 2;
  column-gap: var(--spacing-lg);
}

.equation-variables li {
  margin-bottom: var(--spacing-sm);
  break-inside: avoid;
}

/* Visualizations */
.visualization {
  margin: var(--spacing-xl) 0;
  text-align: center;
}

.visualization-image {
  max-width: 100%;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.visualization figcaption {
  margin-top: var(--spacing-md);
  font-style: italic;
  color: var(--text-muted);
}

/* Tables */
.table-container {
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  box-shadow: var(--shadow);
  border-radius: var(--border-radius);
  overflow: hidden;
}

thead {
  background-color: var(--primary);
  color: var(--text-light);
}

th, td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

tbody tr:nth-child(even) {
  background-color: rgba(0, 0, 0, 0.02);
}

tbody tr:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(126, 87, 194, 0.1);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

.btn {
  display: inline-block;
  background: var(--accent-gradient);
  color: var(--text-light);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  text-align: center;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  color: var(--text-light);
}

.btn-block {
  display: block;
  width: 100%;
}

/* References */
.reference {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
  text-indent: -var(--spacing-lg);
}

.reference a {
  word-break: break-word;
}

/* Footer */
.footer {
  background: var(--cosmic-gradient);
  color: var(--text-light);
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.footer-content {
  max-width: 600px;
  margin: 0 auto;
}

.footer-cta {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  font-family: var(--font-heading);
}

.footer-links {
  margin-bottom: var(--spacing-lg);
}

.footer-link {
  color: var(--text-light);
  margin: 0 var(--spacing-sm);
}

.footer-copyright {
  font-size: 0.9rem;
  opacity: 0.8;
}

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

.text-right {
  text-align: right;
}

.mb-0 {
  margin-bottom: 0;
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.mb-4 {
  margin-bottom: var(--spacing-xl);
}

.mb-5 {
  margin-bottom: var(--spacing-xxl);
}

.mt-0 {
  margin-top: 0;
}

.mt-1 {
  margin-top: var(--spacing-sm);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

.mt-3 {
  margin-top: var(--spacing-lg);
}

.mt-4 {
  margin-top: var(--spacing-xl);
}

.mt-5 {
  margin-top: var(--spacing-xxl);
}

/* Responsive Styles */
@media (max-width: 992px) {
  html {
    font-size: 15px;
  }
  
  .equation-variables ul {
    columns: 1;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  .header-container {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .nav {
    margin-top: var(--spacing-md);
    width: 100%;
  }
  
  .nav-list {
    flex-direction: column;
    width: 100%;
  }
  
  .nav-item {
    margin-left: 0;
    margin-bottom: var(--spacing-sm);
  }
  
  .mobile-menu-toggle {
    display: block;
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
  }
  
  .nav {
    display: none;
  }
  
  .nav.active {
    display: block;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.2rem;
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .hero {
    padding: var(--spacing-xl) 0;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
}

/* Animation Styles */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.8s ease forwards;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.8;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.pulse {
  animation: pulse 2s infinite;
}

/* Pressure Ripple Animation */
.pressure-ripple {
  position: relative;
  width: 200px;
  height: 200px;
  margin: 0 auto;
}

.ripple {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  background: var(--accent-gradient);
  border-radius: 50%;
  opacity: 0.8;
}

.ripple::before,
.ripple::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 50%;
  border: 2px solid var(--accent);
  animation: rippleEffect 2s infinite;
}

.ripple::after {
  animation-delay: 0.5s;
}

@keyframes rippleEffect {
  0% {
    transform: scale(1);
    opacity: 0.8;
  }
  100% {
    transform: scale(3);
    opacity: 0;
  }
}

/* Dark Mode Toggle */
.dark-mode-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  box-shadow: var(--shadow);
  border: none;
  transition: var(--transition);
}

.dark-mode-toggle:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* Dark Mode Styles */
body.dark-mode {
  --background: #121212;
  --card-bg: #1e1e1e;
  --text-dark: #e0e0e0;
  --text-muted: #a0a0a0;
  --border-color: #333333;
}

body.dark-mode .card,
body.dark-mode .concept-card,
body.dark-mode .equation {
  background-color: #1e1e1e;
}

body.dark-mode tbody tr:nth-child(even) {
  background-color: rgba(255, 255, 255, 0.05);
}

body.dark-mode tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

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

.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent);
  color: var(--text-light);
  padding: var(--spacing-sm) var(--spacing-md);
  z-index: 1001;
  transition: top 0.3s;
}

.skip-to-content:focus {
  top: 0;
}

/* Print Styles */
@media print {
  .header, .footer, .dark-mode-toggle {
    display: none;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.5;
    color: #000;
    background-color: #fff;
  }
  
  a {
    color: #000;
    text-decoration: underline;
  }
  
  .container {
    width: 100%;
    max-width: none;
    padding: 0;
    margin: 0;
  }
  
  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
    page-break-inside: avoid;
  }
  
  p, table, figure {
    page-break-inside: avoid;
  }
  
  img {
    max-width: 100% !important;
  }
}