/* ==========================================================================
   MCP Mini Landing Page - Constructivist Style (1920s USSR)
   ========================================================================== */

/* CSS Variables - Design Tokens */
:root {
  /* Constructivist Color Palette */
  --color-red: #E31E24;
  --color-red-dark: #B71C1C;
  --color-black: #000000;
  --color-white: #FFFFFF;
  --color-gray-light: #F5F5F5;
  --color-gray-medium: #9E9E9E;
  --color-gray-dark: #424242;
  
  /* Typography */
  --font-primary: 'Arial', 'Helvetica', sans-serif;
  --font-weight-bold: 700;
  --font-weight-normal: 400;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Borders */
  --border-width-thick: 4px;
  --border-width-medium: 2px;
  --border-width-thin: 1px;
  
  /* Shadows */
  --shadow-constructivist: 8px 8px 0 0 var(--color-black);
  --shadow-constructivist-small: 4px 4px 0 0 var(--color-black);
}

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

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

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--color-black);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 3rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

h2 {
  font-size: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h3 {
  font-size: 1.5rem;
  text-transform: uppercase;
}

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

/* Layout Container */
.landing-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header Section */
.header {
  border: var(--border-width-thick) solid var(--color-black);
  background-color: var(--color-red);
  color: var(--color-white);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-constructivist);
  text-align: center;
}

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

.header .tagline {
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.95;
}

/* Main Content Grid */
.main-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

/* Left Column - Information */
.info-section {
  border: var(--border-width-thick) solid var(--color-black);
  padding: var(--spacing-lg);
  background-color: var(--color-gray-light);
  box-shadow: var(--shadow-constructivist-small);
}

.info-section h2 {
  color: var(--color-red);
  margin-bottom: var(--spacing-md);
  border-bottom: var(--border-width-medium) solid var(--color-black);
  padding-bottom: var(--spacing-sm);
}

.features-list {
  list-style: none;
  margin-top: var(--spacing-md);
}

.features-list li {
  padding: var(--spacing-sm) 0;
  border-left: var(--border-width-thick) solid var(--color-red);
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  position: relative;
}

.features-list li::before {
  content: "▶";
  position: absolute;
  left: -12px;
  color: var(--color-red);
  font-size: 0.8rem;
}

/* Right Column - Login Form */
.login-section {
  border: var(--border-width-thick) solid var(--color-black);
  padding: var(--spacing-lg);
  background-color: var(--color-white);
  box-shadow: var(--shadow-constructivist-small);
}

.login-section h2 {
  color: var(--color-red);
  margin-bottom: var(--spacing-md);
  border-bottom: var(--border-width-medium) solid var(--color-black);
  padding-bottom: var(--spacing-sm);
}

/* Form Styles */
.login-form {
  margin-top: var(--spacing-md);
}

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

.form-group label {
  display: block;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
  color: var(--color-black);
}

.form-group input {
  width: 100%;
  padding: var(--spacing-sm);
  border: var(--border-width-medium) solid var(--color-black);
  background-color: var(--color-white);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: all 0.2s ease;
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-red);
  box-shadow: 0 0 0 2px var(--color-red);
}

.form-group input:disabled {
  background-color: var(--color-gray-light);
  cursor: not-allowed;
}

/* Button Styles */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border: var(--border-width-thick) solid var(--color-black);
  background-color: var(--color-red);
  color: var(--color-white);
  font-family: var(--font-primary);
  font-weight: var(--font-weight-bold);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  box-shadow: var(--shadow-constructivist-small);
  width: 100%;
  text-align: center;
}

.btn:hover:not(:disabled) {
  background-color: var(--color-red-dark);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 0 var(--color-black);
}

.btn:active:not(:disabled) {
  transform: translate(0, 0);
  box-shadow: var(--shadow-constructivist-small);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Notification System */
.notification-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 1000;
  max-width: 400px;
}

.notification {
  border: var(--border-width-thick) solid var(--color-black);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  box-shadow: var(--shadow-constructivist-small);
  animation: slideIn 0.3s ease-out;
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.notification-success {
  background-color: var(--color-white);
  border-left: var(--border-width-thick) solid var(--color-red);
}

.notification-error {
  background-color: var(--color-red);
  color: var(--color-white);
}

.notification-info {
  background-color: var(--color-gray-light);
  border-left: var(--border-width-thick) solid var(--color-black);
}

.notification-message {
  flex: 1;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

.notification-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: inherit;
  padding: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.notification-close:hover {
  opacity: 1;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.notification.hiding {
  animation: slideOut 0.3s ease-in forwards;
}

@keyframes slideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-white);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: var(--spacing-xs);
  vertical-align: middle;
}

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

.hidden {
  display: none;
}

/* API Info Section */
.api-info {
  border: var(--border-width-thick) solid var(--color-black);
  padding: var(--spacing-lg);
  background-color: var(--color-gray-light);
  box-shadow: var(--shadow-constructivist-small);
  margin-top: var(--spacing-xl);
}

.api-info h3 {
  color: var(--color-red);
  margin-bottom: var(--spacing-md);
  border-bottom: var(--border-width-medium) solid var(--color-black);
  padding-bottom: var(--spacing-sm);
}

.api-endpoints {
  list-style: none;
  margin-top: var(--spacing-md);
}

.api-endpoints li {
  padding: var(--spacing-xs) 0;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  border-left: var(--border-width-thick) solid var(--color-black);
  padding-left: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
}

.api-endpoints code {
  background-color: var(--color-white);
  padding: 2px 4px;
  border: var(--border-width-thin) solid var(--color-black);
  font-weight: var(--font-weight-bold);
}

/* Responsive Design */
@media (max-width: 968px) {
  .main-content {
    grid-template-columns: 1fr;
  }
  
  .header h1 {
    font-size: 2rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .notification-container {
    right: var(--spacing-sm);
    left: var(--spacing-sm);
    max-width: none;
  }
}

@media (max-width: 640px) {
  .landing-container {
    padding: var(--spacing-sm);
  }
  
  .header {
    padding: var(--spacing-md);
  }
  
  .header h1 {
    font-size: 1.5rem;
  }
  
  .info-section,
  .login-section,
  .api-info {
    padding: var(--spacing-md);
  }
}

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

/* Focus Styles for Keyboard Navigation */
*:focus-visible {
  outline: var(--border-width-medium) solid var(--color-red);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .notification-container,
  .login-section {
    display: none;
  }
  
  .landing-container {
    box-shadow: none;
  }
}