/* ==========================================================================
   STRATMONT INVESTMENTS - DESIGN SYSTEM
   Single source of truth for design tokens and base styles
   ========================================================================== */

:root {
  color-scheme: light dark;

  /* Colors - Dark Theme (Default) */
  --color-bg-primary: #050810;
  --color-bg-darker: #020408;
  --color-bg-card: rgba(20, 25, 40, 0.6);
  --color-bg-card-hover: rgba(20, 25, 40, 0.8);
  --color-bg-glass: rgba(255, 255, 255, 0.03);
  --color-bg-glass-hover: rgba(255, 255, 255, 0.06);
  --color-bg-input: rgba(0, 0, 0, 0.2);
  --color-bg-sidebar: rgba(10, 10, 14, 0.98);
  
  --color-gold: #d4af37;
  --color-gold-dim: rgba(212, 175, 55, 0.15);
  --color-gold-glow: rgba(212, 175, 55, 0.25);
  --color-gold-gradient-start: #d4af37;
  --color-gold-gradient-end: #b89324;
  
  --color-text-primary: #f8fafc;
  --color-text-secondary: #f0f2f5;
  --color-text-muted: #94a3b8;
  --color-text-subtle: #6b7280;
  --color-text-dark: #374151;
  
  --color-success: #10b981;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-info: #3b82f6;
  --color-accent-blue: #1e3a8a;
  
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-gold: rgba(212, 175, 55, 0.3);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: clamp(1.25rem, 2vw, 1.5rem);
  --text-3xl: clamp(1.5rem, 3vw, 2rem);
  --text-4xl: clamp(2rem, 4vw, 2.5rem);
  --text-5xl: clamp(2.5rem, 5vw, 3.5rem);
  --text-6xl: clamp(3rem, 6vw, 4.5rem);

  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Border Radius */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows & Glassmorphism Tokens */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.6);
  --shadow-gold: 0 4px 24px rgba(212,175,55,0.15);
  --shadow-gold-lg: 0 8px 40px rgba(212,175,55,0.2);
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(255, 255, 255, 0.06);
  --shadow-card-hover: 0 12px 36px -4px rgba(0, 0, 0, 0.7), 0 0 1px 1px rgba(212, 175, 55, 0.3);
  --shadow-gold-glow: 0 0 24px -4px rgba(212, 175, 55, 0.35), 0 4px 16px -2px rgba(212, 175, 55, 0.2);
  --shadow-ambient: 0 8px 32px 0 rgba(0, 0, 0, 0.36);

  --bg-glass-card: rgba(20, 25, 40, 0.65);
  --bg-glass-card-hover: rgba(26, 33, 52, 0.85);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-hover: rgba(212, 175, 55, 0.35);

  /* Z-Index Scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-popover: 500;
  --z-toast: 600;
  --z-tooltip: 700;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --container-width: 1280px;
  --container-padding: 2rem;
  --sidebar-width: 260px;
  --topbar-height: 70px;
}

/* Light Theme Overrides */
[data-theme='light'] {
  --color-bg-primary: #f8fafc;
  --color-bg-darker: #f1f5f9;
  --color-bg-card: rgba(255, 255, 255, 0.9);
  --color-bg-card-hover: rgba(255, 255, 255, 1);
  --color-bg-glass: rgba(0, 0, 0, 0.02);
  --color-bg-glass-hover: rgba(0, 0, 0, 0.05);
  --color-bg-input: rgba(255, 255, 255, 0.8);
  --color-bg-sidebar: rgba(255, 255, 255, 0.98);
  
  --color-text-primary: #0f172a;
  --color-text-secondary: #1e293b;
  --color-text-muted: #64748b;
  --color-text-subtle: #94a3b8;
  --color-text-dark: #f8fafc;
  
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-gold: rgba(184, 147, 36, 0.35);
  --color-gold: #b89324;
  --color-gold-dim: rgba(184, 147, 36, 0.12);
  --color-gold-glow: rgba(184, 147, 36, 0.22);
  
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.16);
  --shadow-card: 0 4px 16px -2px rgba(15, 23, 42, 0.06), 0 0 1px 1px rgba(15, 23, 42, 0.05);
  --shadow-card-hover: 0 12px 32px -4px rgba(15, 23, 42, 0.12), 0 0 1px 1px rgba(184, 147, 36, 0.25);
  --shadow-gold-glow: 0 0 20px -4px rgba(184, 147, 36, 0.25), 0 4px 12px -2px rgba(184, 147, 36, 0.15);
  --shadow-ambient: 0 8px 24px 0 rgba(15, 23, 42, 0.06);

  --bg-glass-card: rgba(255, 255, 255, 0.85);
  --bg-glass-card-hover: rgba(255, 255, 255, 1);
  --border-glass: rgba(15, 23, 42, 0.08);
  --border-glass-hover: rgba(184, 147, 36, 0.35);
}

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

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -ms-overflow-style: none;  /* IE and Edge */
  scrollbar-width: none;  /* Firefox */
}

/* Hide scrollbar for Chrome, Safari and Opera */
::-webkit-scrollbar {
  display: none;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font-family: inherit;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
}

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

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

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.text-gold { color: var(--color-gold); }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.text-info { color: var(--color-info); }

.bg-darker { background-color: var(--color-bg-darker); }

/* ==========================================================================
   COMMON COMPONENT BASE STYLES
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section {
  padding-block: var(--space-16);
}

@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
  }
  .section {
    padding-block: var(--space-10);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-normal), color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
  line-height: 1.5;
}

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

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

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

.btn-primary {
  background: linear-gradient(135deg, var(--color-gold-gradient-start), var(--color-gold-gradient-end));
  color: #000;
  font-weight: 600;
  box-shadow: var(--shadow-gold);
}

.btn-primary:hover:not(:disabled) {
  box-shadow: var(--shadow-gold-lg);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg-glass-hover);
  border-color: var(--color-gold-dim);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-primary);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-bg-glass-hover);
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.btn-danger:hover:not(:disabled) {
  background: #dc2626;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* ==========================================================================
   KEYFRAME ANIMATIONS
   ========================================================================== */

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

@keyframes float {
  0% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0); }
}

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

/* ==========================================================================
   SKELETON LOADING
   ========================================================================== */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-card) 25%,
    var(--color-bg-glass-hover) 50%,
    var(--color-bg-card) 75%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite linear;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: var(--text-base);
  width: 100%;
  margin-bottom: var(--space-2);
}

.skeleton-circle {
  border-radius: var(--radius-full);
}

.skeleton-card {
  height: 200px;
  width: 100%;
}

/* ==========================================================================
   ELEVATED SAAS SURFACES & SHIMMER LOADERS (PHASE 2)
   ========================================================================== */

.card-elevated {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: background-color var(--transition-normal), color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
}

.card-elevated:hover {
  background: var(--bg-glass-card-hover);
  border-color: var(--border-glass-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

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

.skeleton-shimmer {
  background: linear-gradient(
    90deg,
    var(--color-bg-card) 0%,
    var(--color-bg-glass-hover) 50%,
    var(--color-bg-card) 100%
  );
  background-size: 200% 100%;
  animation: shimmer-pass 1.6s ease-in-out infinite;
  border-radius: var(--radius-md);
  transition: opacity var(--transition-normal);
}

.skeleton-fade-out {
  opacity: 0;
  pointer-events: none;
}