/**
 * CRITICAL CSS - Loaded synchronously before first paint
 *
 * This file contains:
 * 1. CSS variables (colors, spacing, etc.)
 * 2. Accent color themes (applied by theme-init.js)
 * 3. Basic html/body/root styles
 * 4. Loading indicator
 * 5. Minimal fallback styles for components affected by CSS loading race conditions
 *
 * Note: Component fallbacks (status badges, armband numbers) prevent visual glitches
 * during the brief window when React renders before component CSS loads.
 */

/* ============================================
   ESSENTIAL CSS VARIABLES
   ============================================ */
:root {
  /* Base Theme Colors (Light) - Warm premium backgrounds */
  --background: #F8F7F4;  /* Warm off-white */
  --foreground: #0a0a0a;
  --card: #FEFDFB;        /* Subtle cream tint */
  --border: #e5e7eb;
  --muted: #f6f6f6;
  --input: #f3f4f6;

  /* Primary Color - Default to teal (overridden by accent classes) */
  --primary: #14b8a6;
  --primary-hover: #0d9488;
  --primary-foreground: #ffffff;
  
  /* Accent Color - Defaults to primary, overridden by accent classes */
  --accent-color: var(--primary);

  /* Overlay/Shadow Colors */
  --overlay-white-heavy: rgba(255, 255, 255, 0.8);
  --shadow-medium: rgba(0, 0, 0, 0.3);
  --shadow-subtle: rgba(0, 0, 0, 0.1);

  /* Spacing Tokens */
  --token-space-xs: 0.125rem;
  --token-space-sm: 0.25rem;
  --token-space-md: 0.5rem;
  --token-space-lg: 0.75rem;
  --token-space-xl: 1rem;
  --token-space-2xl: 1.25rem;
  --token-space-3xl: 1.5rem;
  --token-space-4xl: 2rem;

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

  /* Font Sizes */
  --font-size-base: 1rem;
  --token-font-sm: 0.75rem;
  --token-font-md: 0.875rem;
  --token-font-lg: 1rem;
  --token-font-xl: 1.25rem;

  /* Text Colors */
  --muted-foreground: #6b7280;

  /* ===== STATUS BADGE COLORS (Critical - must load before React) ===== */
  /* Class status badges */
  --status-no-status-bg: #9ca3af;
  --status-no-status-text: #ffffff;
  --status-setup-bg: #b45309;
  --status-briefing-bg: #ff6b00;
  --status-in-progress-bg: #0066ff;
  --status-offline-scoring-bg: #f59e0b;
  --status-completed-bg: #00cc66;
  --status-break-bg: #c000ff;

  /* Check-in status colors */
  --checkin-none: #6b7280;
  --checkin-none-text: #ffffff;
  --checkin-checked-in: #22c55e;
  --checkin-checked-in-text: #ffffff;
  --checkin-conflict: #f97316;
  --checkin-conflict-text: #ffffff;
  --checkin-pulled: #dc3545;
  --checkin-pulled-text: #ffffff;
  --checkin-at-gate: #6f42c1;
  --checkin-at-gate-text: #ffffff;
  --checkin-in-ring: #f59e0b;
  --checkin-in-ring-text: #1a1a1a;
  --token-text-secondary: #6b7280;

  /* Secondary/Surface Colors - Warm premium backgrounds */
  --secondary: #F8F7F4;  /* Warm off-white - page container backgrounds */
  --secondary-foreground: #0f172a;

  /* Shadows */
  --token-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --token-shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);

  /* Z-Index */
  --token-z-modal: 1000;

  /* Dark Overlay */
  --overlay-dark-heavy: rgba(26, 29, 35, 0.8);
}

/* ============================================
   DARK THEME
   ============================================ */
.theme-dark {
  --background: #1a1a1e;  /* Warmer charcoal */
  --foreground: #ffffff;
  --card: rgba(30, 41, 59, 0.7);
  --border: #4a5568;
  --muted: #2d3748;
  --input: #2d3748;
  --overlay-white-heavy: rgba(30, 41, 59, 0.9);
  --muted-foreground: #94a3b8;
  --token-text-secondary: #94a3b8;
  --secondary: #1e293b;
  --secondary-foreground: #f8fafc;
}

/* ============================================
   ACCENT COLOR THEMES
   (Applied by theme-init.js synchronously)
   ============================================ */
:root.accent-green,
html.accent-green {
  --primary: #14b8a6;
  --primary-hover: #0d9488;
  --accent-primary: #14b8a6;
  --accent-color: #14b8a6;
  --accent-glow: rgba(20, 184, 166, 0.3);
}

:root.accent-blue,
html.accent-blue {
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --accent-primary: #3b82f6;
  --accent-color: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.3);
}

:root.accent-orange,
html.accent-orange {
  --primary: #f97316;
  --primary-hover: #ea580c;
  --accent-primary: #f97316;
  --accent-color: #f97316;
  --accent-glow: rgba(249, 115, 22, 0.3);
}

:root.accent-purple,
html.accent-purple {
  --primary: #8b5cf6;
  --primary-hover: #7c3aed;
  --accent-primary: #8b5cf6;
  --accent-color: #8b5cf6;
  --accent-glow: rgba(139, 92, 246, 0.3);
}

/* ============================================
   BASE LAYOUT (minimal - prevents white flash)
   ============================================ */
html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background-color: var(--background);
  color: var(--foreground);
  /* Montserrat is primary, system fonts as fallback */
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
}

#root {
  min-height: 100vh;
  background-color: var(--background);
}

/* Main page containers - prevent white flash */
.home-container,
.page-container,
.entry-list-container,
.class-list-container,
.app-container {
  background-color: var(--background);
  min-height: 100vh;
}

/* Landing & Login page overrides - use their own dark themes */
/* These pages have isolated dark themes and must NOT inherit app design tokens */
body:has(.landing-page),
body:has(.login-container) {
  /* Override ALL design token variables that could leak light colors */
  --background: #09090b !important;
  --foreground: #fafafa !important;
  --card: #18181b !important;
  --card-foreground: #fafafa !important;
  --surface: #18181b !important;
  --muted: #27272a !important;
  --muted-foreground: #a1a1aa !important;
  --secondary: #18181b !important;
  --secondary-foreground: #fafafa !important;
}

body:has(.landing-page),
body:has(.landing-page) #root,
body:has(.login-container),
body:has(.login-container) #root {
  background-color: #09090b !important;
  color: #fafafa !important;
}

.landing-page,
.landing-page *,
.login-container,
.login-container *,
.login-background {
  /* Force dark backgrounds on all elements */
  --background: #09090b;
  --card: #18181b;
  --surface: #18181b;
}

/* Ensure login logo elements don't inherit app backgrounds */
.login-container .logo-container,
.login-container .logo-image,
.login-container .logo-img {
  background-color: transparent !important;
}

/* Page loader - matches theme background */
.page-loader-container {
  background-color: var(--background);
  min-height: 100vh;
}

.page-loader-container .loader-text {
  color: var(--muted-foreground);
}

.page-loader-container .loader-spinner {
  color: var(--primary);
}

* {
  box-sizing: border-box;
}

/* ============================================
   CRITICAL COMPONENT FALLBACKS
   Ensures elements look correct before component CSS loads
   Prevents visual glitches during CSS loading race condition
   ============================================ */

/* Status Badge Fallbacks - White text is the default (always, light or dark mode) */
.status-badge,
.class-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  background: #9ca3af; /* Gray default */
  color: #ffffff; /* Always white text on status badges */
  border: none;
}

/* Status-specific background colors (text color inherited from base) */
.status-badge.no-status,
.class-status-badge.no-status { background: #9ca3af; }
.status-badge.setup,
.class-status-badge.setup { background: #b45309; }
.status-badge.briefing,
.class-status-badge.briefing { background: #ff6b00; }
.status-badge.break,
.class-status-badge.break { background: #c000ff; }
.status-badge.start-time,
.class-status-badge.start-time { background: #14b8a6; }
.status-badge.in-progress,
.class-status-badge.in-progress { background: #0066ff; }
.status-badge.completed,
.class-status-badge.completed { background: #00cc66; }
.status-badge.pending,
.class-status-badge.pending { background: #9ca3af; }

/* Status text inherits white from parent badge */
.status-badge .status-text,
.class-status-badge .status-text {
  color: inherit;
}

/* Armband Badge Fallback - Teal circular badge (Home page dog cards) */
.apple-armband-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  min-width: 2.75rem;
  min-height: 2.75rem;
  border-radius: 50%;
  background: var(--primary, #14b8a6); /* Teal default */
  color: #ffffff;
  font-weight: 700;
  font-size: 0.9375rem;
}

/* Dog Card Fallbacks - Prevent overlap during CSS loading */
.dog-card,
.entry-card {
  min-height: 70px;
  max-height: none;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-sizing: border-box;
}

/* ============================================
   ABOVE-THE-FOLD COMPONENT FALLBACKS
   Prevents layout shift on initial render
   ============================================ */

/* Search Input - Home page header */
.search-input-container,
.search-controls-header {
  display: flex;
  align-items: center;
  gap: var(--token-space-md);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--token-radius-lg);
}

.search-input-full {
  width: 100%;
  padding: var(--token-space-md) var(--token-space-xl);
  background: var(--input);
  border: 1px solid var(--border);
  border-radius: var(--token-radius-md);
  font-size: var(--token-font-md);
  color: var(--foreground);
}

/* Tab Bar - Filter controls */
.apple-tabs-container {
  display: grid;
  width: 100%;
  border-radius: var(--token-radius-lg);
  background: var(--muted);
  padding: var(--token-space-sm);
}

.apple-tab-trigger {
  border-radius: var(--token-radius-md);
  padding: var(--token-space-lg) var(--token-space-xl);
  background: transparent;
  border: none;
  color: var(--muted-foreground);
  font-weight: 500;
  cursor: pointer;
}

.apple-tab-trigger[data-state="active"],
.apple-tab-trigger.active {
  background: var(--card);
  color: var(--foreground);
}

/* Class Card Structure - Prevents layout shift */
.class-card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--token-radius-lg);
  padding: var(--token-space-lg);
  min-height: 80px;
}

/* Floating Action Button - Position immediately */
.floating-action-button {
  position: fixed;
  bottom: calc(env(safe-area-inset-bottom, 0px) + 5rem);
  right: var(--token-space-xl);
  z-index: 100;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: var(--primary);
  color: var(--primary-foreground);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* ============================================
   LOADING INDICATOR
   (Shows while React is loading)
   ============================================ */
#root:empty::before {
  content: "";
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}