/* ============================
   Δ DELTA 360 — MODERN THEME
   ============================ */

:root {
  /* Brand - Enhanced Orange/Amber Palette */
  --brand: #f97316;
  --brand-hover: #ea580c;
  --brand-light: #fed7aa;
  --brand-dark: #c2410c;
  --brand-tint: rgba(249, 115, 22, 0.08);
  --brand-glow: rgba(249, 115, 22, 0.2);

  /* Status Colors */
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --info: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.1);

  /* Light Mode (Default) */
  --bg-primary: #ffffff;
  --bg-secondary: #fafafa;
  --bg-tertiary: #f5f5f5;
  --bg-hover: #f0f0f0;
  --bg-active: #e8e8e8;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --text-disabled: #cbd5e1;

  --border: #e2e8f0;
  --border-dark: #cbd5e1;
  --border-light: #f1f5f9;

  /* Dark Mode */
  --dark-bg-primary: #0f172a;
  --dark-bg-secondary: #1e293b;
  --dark-bg-tertiary: #334155;
  --dark-bg-hover: #475569;
  --dark-bg-active: #64748b;

  --dark-text-primary: #f8fafc;
  --dark-text-secondary: #cbd5e1;
  --dark-text-tertiary: #94a3b8;
  --dark-text-disabled: #64748b;

  --dark-border: #334155;
  --dark-border-dark: #475569;
  --dark-border-light: #1e293b;

  /* Shadows - Enhanced with multiple levels */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);
  --shadow-brand: 0 4px 16px var(--brand-glow);

  /* Spacing & Border Radius */
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Blur */
  --blur-sm: blur(8px);
  --blur-md: blur(12px);
  --blur-lg: blur(16px);
}

/* Dark theme */
body.dark {
  --bg-primary: var(--dark-bg-primary);
  --bg-secondary: var(--dark-bg-secondary);
  --bg-tertiary: var(--dark-bg-tertiary);
  --bg-hover: var(--dark-bg-hover);
  --bg-active: var(--dark-bg-active);
  --text-primary: var(--dark-text-primary);
  --text-secondary: var(--dark-text-secondary);
  --text-tertiary: var(--dark-text-tertiary);
  --text-disabled: var(--dark-text-disabled);
  --border: var(--dark-border);
  --border-dark: var(--dark-border-dark);
  --border-light: var(--dark-border-light);
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.7);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.8);
  --brand-tint: rgba(249, 115, 22, 0.12);
  --brand-glow: rgba(249, 115, 22, 0.3);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Helvetica Neue', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* Enhanced Scrollbars */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-dark);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-primary);
  transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

::-webkit-scrollbar-corner {
  background: transparent;
}

/* Typography - Enhanced */
h1 { 
  font-size: 32px; 
  font-weight: 700; 
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h2 { 
  font-size: 26px; 
  font-weight: 700; 
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h3 { 
  font-size: 20px; 
  font-weight: 600; 
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h4 { 
  font-size: 16px; 
  font-weight: 600; 
  line-height: 1.4;
}

p {
  margin-bottom: 1em;
}

a {
  color: var(--brand);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

a:hover {
  color: var(--brand-hover);
}

a:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Input base styles - Enhanced */
input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  transition: all var(--transition-base);
  width: 100%;
}

input::placeholder,
textarea::placeholder {
  color: var(--text-disabled);
}

input:hover,
textarea:hover,
select:hover {
  border-color: var(--border-dark);
}

input:focus, 
textarea:focus, 
select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px var(--brand-tint);
  background: var(--bg-primary);
}

input:disabled,
textarea:disabled,
select:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Selection */
::selection {
  background: var(--brand-tint);
  color: var(--text-primary);
}

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

/* Utility classes */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.skeleton {
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-tertiary) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

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

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

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

@keyframes fadeInUp {
  from { 
    opacity: 0; 
    transform: translateY(12px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

@keyframes slideUp {
  from { 
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  100% {
    transform: scale(4);
    opacity: 0;
  }
}

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

/* Print styles */
@media print {
  body {
    background: white;
    color: black;
  }
}