/* UI.css - Dark Metallic Industrial Theme */

:root {
  /* Dark Metallic Color Palette */
  --lens-primary: #3b82f6;           /* Metallic blue */
  --lens-primary-light: #60a5fa;     /* Lighter metallic blue */
  --lens-primary-dark: #1e40af;      /* Darker blue */
  --lens-secondary: #f59e0b;         /* Gold accent */
  --lens-accent: #06b6d4;            /* Cyan accent */

  /* Dark Metallic Surfaces */
  --lens-bg: #0f172a;                /* Deep dark blue-black */
  --lens-surface: #1e293b;           /* Dark slate surface */
  --lens-surface-elevated: #334155;  /* Elevated slate */
  --lens-surface-highlight: #475569; /* Highlighted surface */

  /* Metallic Borders & Accents */
  --lens-border: #475569;            /* Gunmetal border */
  --lens-border-light: #64748b;      /* Light gunmetal */
  --lens-border-bright: #94a3b8;     /* Bright metallic */

  /* Text Colors (High Contrast for Readability) */
  --lens-text-primary: #f1f5f9;      /* Bright white-blue */
  --lens-text-secondary: #cbd5e1;    /* Light gray */
  --lens-text-muted: #94a3b8;        /* Medium gray */
  --lens-text-inverse: #0f172a;      /* Dark text on light */

  /* Status Colors (Metallic Versions) */
  --lens-success: #10b981;           /* Green */
  --lens-success-bg: rgba(16, 185, 129, 0.15);
  --lens-warning: #f59e0b;           /* Gold */
  --lens-warning-bg: rgba(245, 158, 11, 0.15);
  --lens-error: #ef4444;             /* Red */
  --lens-error-bg: rgba(239, 68, 68, 0.15);
  --lens-info: #3b82f6;              /* Blue */
  --lens-info-bg: rgba(59, 130, 246, 0.15);

  /* Interactive States */
  --lens-hover: rgba(59, 130, 246, 0.15);
  --lens-active: rgba(59, 130, 246, 0.25);
  --lens-focus: rgba(59, 130, 246, 0.4);

  /* Metallic Shadows (Deeper for 3D Effect) */
  --lens-shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.4);
  --lens-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --lens-shadow-md: 0 6px 12px -2px rgba(0, 0, 0, 0.5), 0 4px 8px -2px rgba(0, 0, 0, 0.3);
  --lens-shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.6), 0 6px 12px -3px rgba(0, 0, 0, 0.4);
  --lens-shadow-xl: 0 20px 40px -8px rgba(0, 0, 0, 0.7), 0 10px 20px -5px rgba(0, 0, 0, 0.5);

  /* Metallic Shine Effect */
  --lens-shine: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 50%, rgba(255,255,255,0) 100%);

  /* Border Radius */
  --lens-radius-sm: 0.375rem;
  --lens-radius: 0.5rem;
  --lens-radius-md: 0.75rem;
  --lens-radius-lg: 1rem;
  --lens-radius-xl: 1.5rem;

  /* Spacing Scale */
  --lens-space-1: 0.25rem;
  --lens-space-2: 0.5rem;
  --lens-space-3: 0.75rem;
  --lens-space-4: 1rem;
  --lens-space-5: 1.25rem;
  --lens-space-6: 1.5rem;
  --lens-space-8: 2rem;
  --lens-space-10: 2.5rem;
  --lens-space-12: 3rem;

  /* Typography */
  --lens-font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --lens-font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;

  /* Font Sizes */
  --lens-text-xs: 0.75rem;
  --lens-text-sm: 0.875rem;
  --lens-text-base: 1rem;
  --lens-text-lg: 1.125rem;
  --lens-text-xl: 1.25rem;
  --lens-text-2xl: 1.5rem;
  --lens-text-3xl: 1.875rem;
  --lens-text-4xl: 2.25rem;

  /* Line Heights */
  --lens-leading-tight: 1.25;
  --lens-leading-snug: 1.375;
  --lens-leading-normal: 1.5;
  --lens-leading-relaxed: 1.625;
}

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

html {
  font-family: var(--lens-font-sans);
  line-height: var(--lens-leading-normal);
  color: var(--lens-text-primary);
  background-color: var(--lens-bg);
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

/* Hero Background - Subtle Metallic Texture */
.lens-hero-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(245, 158, 11, 0.02) 0%, transparent 50%);
  z-index: -1;
}

/* Layout Components */
.lens-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--lens-space-4);
}

.lens-container-sm {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--lens-space-4);
}

.lens-stack {
  display: flex;
  flex-direction: column;
  gap: var(--lens-space-4);
}

.lens-stack-sm {
  gap: var(--lens-space-2);
}

.lens-stack-lg {
  gap: var(--lens-space-6);
}

.lens-grid {
  display: grid;
  gap: var(--lens-space-4);
}

.lens-grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.lens-grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Card Components - Metallic */
.lens-card {
  background: var(--lens-surface);
  border-radius: var(--lens-radius-lg);
  box-shadow: var(--lens-shadow-md);
  padding: var(--lens-space-6);
  border: 1px solid var(--lens-border);
  position: relative;
  transition: all 0.3s ease;
}

.lens-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--lens-shine);
  border-radius: var(--lens-radius-lg);
  pointer-events: none;
  opacity: 0.5;
}

.lens-card:hover {
  box-shadow: var(--lens-shadow-lg);
  transform: translateY(-2px);
  border-color: var(--lens-border-light);
}

.lens-card-elevated {
  box-shadow: var(--lens-shadow-xl);
  border: 1px solid var(--lens-border-light);
  background: var(--lens-surface-elevated);
}

.lens-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--lens-space-4);
  padding-bottom: var(--lens-space-3);
  border-bottom: 1px solid var(--lens-border);
}

.lens-card-title {
  font-size: var(--lens-text-xl);
  font-weight: 600;
  color: var(--lens-text-primary);
  margin: 0;
}

.lens-card-body {
  color: var(--lens-text-secondary);
}

/* Typography */
.lens-heading-1 {
  font-size: var(--lens-text-4xl);
  font-weight: 700;
  line-height: var(--lens-leading-tight);
  color: var(--lens-text-primary);
  margin: 0 0 var(--lens-space-6) 0;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.lens-heading-2 {
  font-size: var(--lens-text-3xl);
  font-weight: 600;
  line-height: var(--lens-leading-tight);
  color: var(--lens-text-primary);
  margin: 0 0 var(--lens-space-4) 0;
}

.lens-heading-3 {
  font-size: var(--lens-text-2xl);
  font-weight: 600;
  line-height: var(--lens-leading-snug);
  color: var(--lens-text-primary);
  margin: 0 0 var(--lens-space-3) 0;
}

.lens-text {
  font-size: var(--lens-text-base);
  line-height: var(--lens-leading-normal);
  color: var(--lens-text-secondary);
  margin: 0;
}

.lens-text-sm {
  font-size: var(--lens-text-sm);
  color: var(--lens-text-muted);
}

.lens-text-lg {
  font-size: var(--lens-text-lg);
}

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

/* Button Components - Metallic */
.lens-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--lens-space-2);
  padding: var(--lens-space-3) var(--lens-space-6);
  font-family: inherit;
  font-size: var(--lens-text-base);
  font-weight: 600;
  line-height: 1;
  border: none;
  border-radius: var(--lens-radius);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
  min-height: 44px;
  position: relative;
  overflow: hidden;
}

.lens-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: left 0.5s ease;
}

.lens-btn:hover::before {
  left: 100%;
}

.lens-btn:focus {
  outline: 2px solid var(--lens-focus);
  outline-offset: 2px;
}

.lens-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.lens-btn-primary {
  background: linear-gradient(135deg, var(--lens-primary) 0%, var(--lens-primary-dark) 100%);
  color: var(--lens-text-primary);
  box-shadow: var(--lens-shadow),
              inset 0 1px 0 rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.1);
}

.lens-btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--lens-primary-light) 0%, var(--lens-primary) 100%);
  transform: translateY(-2px);
  box-shadow: var(--lens-shadow-lg),
              inset 0 1px 0 rgba(255,255,255,0.15);
}

.lens-btn-secondary {
  background: linear-gradient(135deg, var(--lens-surface-elevated) 0%, var(--lens-surface) 100%);
  color: var(--lens-text-primary);
  border: 1px solid var(--lens-border);
  box-shadow: var(--lens-shadow),
              inset 0 1px 0 rgba(255,255,255,0.05);
}

.lens-btn-secondary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--lens-surface-highlight) 0%, var(--lens-surface-elevated) 100%);
  border-color: var(--lens-border-light);
  transform: translateY(-1px);
  box-shadow: var(--lens-shadow-md);
}

.lens-btn-accent {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: var(--lens-text-inverse);
  box-shadow: var(--lens-shadow),
              inset 0 1px 0 rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.1);
}

.lens-btn-accent:hover:not(:disabled) {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  transform: translateY(-2px);
  box-shadow: var(--lens-shadow-lg),
              inset 0 1px 0 rgba(255,255,255,0.25);
}

.lens-btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--lens-text-secondary);
  border: 1px solid var(--lens-border);
}

.lens-btn-ghost:hover:not(:disabled) {
  background: rgba(255,255,255,0.1);
  color: var(--lens-text-primary);
  border-color: var(--lens-border-light);
}

.lens-btn-sm {
  padding: var(--lens-space-2) var(--lens-space-4);
  font-size: var(--lens-text-sm);
  min-height: 36px;
}

.lens-btn-lg {
  padding: var(--lens-space-4) var(--lens-space-8);
  font-size: var(--lens-text-lg);
  min-height: 52px;
}

/* Form Components - Dark Metallic */
.lens-form-group {
  display: flex;
  flex-direction: column;
  gap: var(--lens-space-2);
}

.lens-label {
  font-size: var(--lens-text-sm);
  font-weight: 600;
  color: var(--lens-text-primary);
}

.lens-input {
  padding: var(--lens-space-3);
  font-family: inherit;
  font-size: var(--lens-text-base);
  border: 1px solid var(--lens-border);
  border-radius: var(--lens-radius);
  background: var(--lens-surface);
  color: var(--lens-text-primary);
  transition: all 0.2s ease;
  min-height: 44px;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.lens-input:focus {
  outline: none;
  border-color: var(--lens-primary);
  box-shadow: 0 0 0 3px var(--lens-focus),
              inset 0 2px 4px rgba(0, 0, 0, 0.3);
  background: var(--lens-surface-elevated);
}

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

/* Navigation - Metallic Bar */
.lens-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--lens-space-4) var(--lens-space-6);
  background: linear-gradient(135deg, var(--lens-surface) 0%, var(--lens-surface-elevated) 100%);
  border-bottom: 1px solid var(--lens-border-light);
  box-shadow: var(--lens-shadow-md),
              inset 0 1px 0 rgba(255,255,255,0.05);
  position: relative;
}

.lens-nav::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lens-border-bright), transparent);
}

.lens-nav-brand {
  font-size: var(--lens-text-xl);
  font-weight: 700;
  background: linear-gradient(135deg, var(--lens-primary-light) 0%, var(--lens-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}

.lens-nav-links {
  display: flex;
  align-items: center;
  gap: var(--lens-space-4);
}

/* Status Indicators - Metallic */
.lens-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--lens-space-1) var(--lens-space-3);
  font-size: var(--lens-text-xs);
  font-weight: 600;
  border-radius: var(--lens-radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border: 1px solid;
}

.lens-badge-success {
  background: var(--lens-success-bg);
  color: var(--lens-success);
  border-color: var(--lens-success);
}

.lens-badge-warning {
  background: var(--lens-warning-bg);
  color: var(--lens-warning);
  border-color: var(--lens-warning);
}

.lens-badge-error {
  background: var(--lens-error-bg);
  color: var(--lens-error);
  border-color: var(--lens-error);
}

.lens-badge-info {
  background: var(--lens-info-bg);
  color: var(--lens-info);
  border-color: var(--lens-info);
}

/* Loading States */
.lens-loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--lens-border);
  border-top: 2px solid var(--lens-primary);
  border-radius: 50%;
  animation: lens-spin 1s linear infinite;
}

@keyframes lens-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Utility Classes */
.lens-hidden {
  display: none !important;
}

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

.lens-text-center {
  text-align: center;
}

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

.lens-mb-0 { margin-bottom: 0; }
.lens-mb-1 { margin-bottom: var(--lens-space-1); }
.lens-mb-2 { margin-bottom: var(--lens-space-2); }
.lens-mb-3 { margin-bottom: var(--lens-space-3); }
.lens-mb-4 { margin-bottom: var(--lens-space-4); }
.lens-mb-6 { margin-bottom: var(--lens-space-6); }

.lens-mt-0 { margin-top: 0; }
.lens-mt-1 { margin-top: var(--lens-space-1); }
.lens-mt-2 { margin-top: var(--lens-space-2); }
.lens-mt-3 { margin-top: var(--lens-space-3); }
.lens-mt-4 { margin-top: var(--lens-space-4); }
.lens-mt-6 { margin-top: var(--lens-space-6); }

/* Responsive Design */
@media (max-width: 768px) {
  .lens-container {
    padding: var(--lens-space-3);
  }

  .lens-nav {
    padding: var(--lens-space-3) var(--lens-space-4);
  }

  .lens-card {
    padding: var(--lens-space-4);
  }

  .lens-heading-1 {
    font-size: var(--lens-text-3xl);
  }

  .lens-heading-2 {
    font-size: var(--lens-text-2xl);
  }

  .lens-btn {
    width: 100%;
    justify-content: center;
  }

  .lens-nav-links {
    gap: var(--lens-space-2);
  }

  .lens-grid-2,
  .lens-grid-3 {
    grid-template-columns: 1fr;
  }
}

/* Support for safe areas on mobile */
@supports (padding: max(0px)) {
  .lens-container {
    padding-left: max(var(--lens-space-4), env(safe-area-inset-left));
    padding-right: max(var(--lens-space-4), env(safe-area-inset-right));
  }

  .lens-nav {
    padding-left: max(var(--lens-space-6), env(safe-area-inset-left));
    padding-right: max(var(--lens-space-6), env(safe-area-inset-right));
    padding-top: max(var(--lens-space-4), env(safe-area-inset-top));
  }
}