/* ============================================================================
   TOPO3D-Antilles v8 - Design System
   Professional BTP/Engineering Aesthetic
   Inspired by: Autodesk, Mapbox Studio, QGIS
   ============================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Inter:wght@400;500;600;700&display=swap');

/* ============================================================================
   ROOT VARIABLES - Color Palette
   ============================================================================ */

:root {
  /* Color Palette */
  --color-bg-primary: #0F1923;
  --color-bg-secondary: #1B2838;
  --color-bg-card: #1E2D3D;
  --color-bg-card-hover: #243447;
  --color-bg-light: #F5F7FA;

  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-accent: rgba(46, 204, 113, 0.3);

  --color-accent: #2ECC71;
  --color-accent-hover: #27AE60;
  --color-accent-secondary: #E67E22;
  --color-accent-secondary-hover: #D35400;

  --color-text: #E8ECF1;
  --color-text-muted: #7F8C8D;
  --color-text-dark: #1B2838;

  --color-success: #2ECC71;
  --color-error: #E74C3C;
  --color-warning: #F39C12;
  --color-info: #3498DB;

  /* Spacing (8px grid) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Typography */
  --font-heading: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'Fira Code', 'Cascadia Code', 'JetBrains Mono', monospace;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(46, 204, 113, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-base: 250ms ease-out;
  --transition-slow: 350ms ease-out;
}

/* ============================================================================
   RESET & BASE STYLES
   ============================================================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Selection highlight */
::selection {
  background-color: var(--color-accent);
  color: var(--color-text-dark);
}

/* Focus visible states */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Firefox scrollbar */
* {
  scrollbar-color: var(--color-border) var(--color-bg-secondary);
  scrollbar-width: thin;
}

/* ============================================================================
   TYPOGRAPHY
   ============================================================================ */

h1 {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

h2 {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

h4 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

p {
  margin-bottom: var(--space-md);
  font-size: 1rem;
  line-height: 1.6;
}

small {
  font-size: 0.875rem;
  line-height: 1.5;
}

/* Monospace for data values */
.mono {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--color-accent);
}

/* Text utility classes */
.text-accent {
  color: var(--color-accent);
}

.text-muted {
  color: var(--color-text-muted);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: 44px;
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:active {
  transform: scale(0.98);
}

/* Primary button - topo green */
.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-text-dark);
  border: 2px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow: var(--shadow-glow);
}

.btn-primary:disabled {
  background-color: var(--color-text-muted);
  border-color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: 0.6;
}

/* Secondary button - construction orange */
.btn-secondary {
  background-color: var(--color-accent-secondary);
  color: var(--color-text-dark);
  border: 2px solid var(--color-accent-secondary);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--color-accent-secondary-hover);
  border-color: var(--color-accent-secondary-hover);
  box-shadow: var(--shadow-md);
}

.btn-secondary:disabled {
  background-color: var(--color-text-muted);
  border-color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: 0.6;
}

/* Outline button */
.btn-outline {
  background-color: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-outline:hover {
  background-color: rgba(46, 204, 113, 0.1);
  border-color: var(--color-accent-hover);
  color: var(--color-accent-hover);
}

/* Ghost button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text);
  border: none;
}

.btn-ghost:hover {
  background-color: var(--color-bg-card-hover);
  color: var(--color-accent);
}

/* Button sizes */
.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: 0.875rem;
  min-height: 36px;
}

.btn-lg {
  padding: var(--space-md) var(--space-2xl);
  font-size: 1.125rem;
  min-height: 52px;
}

/* ============================================================================
   CARDS & PANELS
   ============================================================================ */

.card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  padding: var(--space-lg);
}

.card:hover {
  background-color: var(--color-bg-card-hover);
  border-color: var(--color-border-accent);
  box-shadow: var(--shadow-md);
}

.card-header {
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.card-header h3 {
  margin: 0;
}

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

.card-footer {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-md);
}

/* Glassmorphism card */
.card-glass {
  background: rgba(30, 45, 61, 0.7);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.card-glass:hover {
  background: rgba(30, 45, 61, 0.85);
  border-color: rgba(46, 204, 113, 0.4);
}

/* ============================================================================
   BADGES
   ============================================================================ */

.badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  background-color: var(--color-bg-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-accent {
  background-color: rgba(46, 204, 113, 0.15);
  color: var(--color-accent);
  border-color: var(--color-border-accent);
}

.badge-warning {
  background-color: rgba(243, 156, 18, 0.15);
  color: var(--color-warning);
  border-color: rgba(243, 156, 18, 0.3);
}

.badge-info {
  background-color: rgba(52, 152, 219, 0.15);
  color: var(--color-info);
  border-color: rgba(52, 152, 219, 0.3);
}

.badge-error {
  background-color: rgba(231, 76, 60, 0.15);
  color: var(--color-error);
  border-color: rgba(231, 76, 60, 0.3);
}

/* ============================================================================
   FORM ELEMENTS
   ============================================================================ */

.input,
.select,
textarea {
  width: 100%;
  padding: var(--space-md);
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.input:focus,
.select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.1);
  background-color: var(--color-bg-card);
}

.input::placeholder {
  color: var(--color-text-muted);
}

.select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%232ECC71' d='M1 4l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  padding-right: var(--space-2xl);
}

textarea {
  resize: vertical;
  min-height: 100px;
}

/* Checkbox toggle switch */
.checkbox-toggle {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 28px;
}

.checkbox-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-toggle .slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg-card);
  transition: background-color var(--transition-base);
  border-radius: 999px;
  border: 1px solid var(--color-border);
}

.checkbox-toggle .slider::before {
  position: absolute;
  content: '';
  height: 20px;
  width: 20px;
  left: 4px;
  bottom: 3px;
  background-color: var(--color-text);
  transition: transform var(--transition-base);
  border-radius: 50%;
}

.checkbox-toggle input:checked + .slider {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.checkbox-toggle input:checked + .slider::before {
  transform: translateX(24px);
  background-color: var(--color-text-dark);
}

/* ============================================================================
   CONTOUR LINE PATTERN BACKGROUND
   ============================================================================ */

.bg-contours {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200' viewBox='0 0 200 200'%3E%3Cg fill='none' stroke='rgba(255,255,255,0.03)' stroke-width='0.5'%3E%3Cpath d='M20,40 Q60,20 100,40 T180,40'/%3E%3Cpath d='M10,70 Q50,50 90,70 T170,70'/%3E%3Cpath d='M30,100 Q70,80 110,100 T190,100'/%3E%3Cpath d='M5,130 Q45,110 85,130 T165,130'/%3E%3Cpath d='M25,160 Q65,140 105,160 T185,160'/%3E%3Cpath d='M15,55 Q45,35 85,55 Q125,75 165,55'/%3E%3Cpath d='M20,115 Q60,95 100,115 Q140,135 180,115'/%3E%3C/g%3E%3C/svg%3E");
  background-repeat: repeat;
}

/* ============================================================================
   SECTION DIVIDERS
   ============================================================================ */

.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  margin: var(--space-2xl) 0;
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

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

/* Flexbox utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-start {
  justify-content: flex-start;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.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);
}

/* Text alignment */
.text-center {
  text-align: center;
}

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

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

/* Visibility */
.hidden {
  display: none !important;
}

.visible {
  display: block;
}

.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;
}

/* Margin utilities */
.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.my-auto {
  margin-top: auto;
  margin-bottom: auto;
}

/* Padding utilities */
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }

/* Display utilities */
.inline-block {
  display: inline-block;
}

.inline-flex {
  display: inline-flex;
}

.block {
  display: block;
}

/* ============================================================================
   ANIMATIONS & KEYFRAMES
   ============================================================================ */

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(46, 204, 113, 0.15);
  }
  50% {
    box-shadow: 0 0 30px rgba(46, 204, 113, 0.25);
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.animate-fade {
  animation: fadeIn var(--transition-base) ease-out;
}

.animate-slide-up {
  animation: slideUp var(--transition-base) ease-out;
}

.animate-slide-down {
  animation: slideDown var(--transition-base) ease-out;
}

.animate-pulse-glow {
  animation: pulse-glow 3s ease-in-out infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

/* Tablet breakpoint (768px) */
@media (max-width: 768px) {
  :root {
    font-size: 15px;
  }

  h1 {
    font-size: 2rem;
    margin-bottom: var(--space-md);
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

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

  .card {
    padding: var(--space-md);
  }
}

/* Mobile breakpoint (480px) */
@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  h3 {
    font-size: 1.125rem;
  }

  p {
    font-size: 0.95rem;
  }

  .btn {
    width: 100%;
    min-height: 40px;
  }

  .btn-lg {
    padding: var(--space-sm) var(--space-lg);
  }

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

  .card-footer {
    flex-direction: column;
  }

  .card-footer .btn {
    width: 100%;
  }

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

  .gap-lg {
    gap: var(--space-md);
  }
}

/* Dark mode is default, light mode support */
@media (prefers-color-scheme: light) {
  body {
    background-color: var(--color-bg-light);
    color: var(--color-text-dark);
  }

  .card {
    background-color: #FFFFFF;
    border-color: rgba(0, 0, 0, 0.1);
    color: var(--color-text-dark);
  }

  .input,
  .select,
  textarea {
    background-color: #FFFFFF;
    color: var(--color-text-dark);
    border-color: rgba(0, 0, 0, 0.15);
  }
}

/* ============================================================================
   ACCESSIBILITY
   ============================================================================ */

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: more) {
  .btn-primary {
    border-width: 2px;
  }

  .btn-secondary {
    border-width: 2px;
  }

  .card {
    border-width: 2px;
  }
}

/* ============================================================================
   PRINT STYLES
   ============================================================================ */

@media print {
  body {
    background-color: white;
    color: #000;
  }

  .btn,
  .card {
    border: 1px solid #000;
  }
}