/* Base styles and CSS custom properties */

:root {
  /* Colors */
  --color-bg-primary: #000;
  --color-bg-secondary: #1a1a1a;
  --color-text-primary: #fff;
  --color-text-secondary: rgba(255, 255, 255, 0.8);
  --color-text-muted: rgba(255, 255, 255, 0.7);
  --color-accent: #22c55e;
  --color-accent-hover: #16a34a;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-success: #22c55e;
  --color-info: #3b82f6;
  
  /* Overlays */
  --overlay-light: rgba(255, 255, 255, 0.1);
  --overlay-medium: rgba(255, 255, 255, 0.2);
  --overlay-dark: rgba(0, 0, 0, 0.5);
  --overlay-gradient-top: linear-gradient(180deg, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
  --overlay-gradient-bottom: linear-gradient(0deg, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  
  /* Borders */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-full: 50%;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(34, 197, 94, 0.4);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  --font-size-xs: 0.7rem;
  --font-size-sm: 0.8rem;
  --font-size-md: 0.9rem;
  --font-size-lg: 1rem;
  --font-size-xl: 1.2rem;
  
  /* Touch targets */
  --touch-target-min: 44px;
  --touch-target-comfortable: 48px;
  
  /* Z-index layers */
  --z-overlay: 10000;
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  height: 100%;
  height: 100dvh; /* Dynamic viewport height for mobile */
}

body {
  font-family: var(--font-family-base);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  height: 100vh;
  height: 100dvh; /* Dynamic viewport height for mobile */
  overflow: hidden;
  display: flex;
  flex-direction: column;
  
  /* Prevent text selection on UI elements */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Allow text selection in specific areas */
input, textarea, [contenteditable] {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}

/* Base interactive elements */
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  transition: var(--transition-fast);
  
  /* Ensure minimum touch target */
  min-width: var(--touch-target-min);
  min-height: var(--touch-target-min);
}

button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

select {
  font-family: inherit;
  background: var(--overlay-light);
  border: 2px solid var(--overlay-medium);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: var(--transition-fast);
}

select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 10px rgba(34, 197, 94, 0.3);
}

/* Fix option styling for all select dropdowns */
select option {
  background: var(--color-bg-secondary) !important;
  color: var(--color-text-primary) !important;
  padding: var(--space-sm);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--overlay-medium);
  border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--overlay-medium);
}

/* 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;
}

.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;
}

/* Focus management */
.focus-trap {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
}

/* Safe area support for mobile devices */
@supports (padding: max(0px)) {
  body {
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
  }
}