/* Tea-inspired Design System for Josie's Birthday Party Site */

/* ===== CSS VARIABLES ===== */
:root {
  /* Colors - Tea inspired palette */
  --color-primary: #8B5CF6;        /* Vibrant purple */
  --color-primary-dark: #7C3AED;
  --color-primary-light: #A78BFA;
  
  --color-secondary: #EC4899;      /* Pink accent */
  --color-secondary-dark: #DB2777;
  --color-secondary-light: #F9A8D4;
  
  --color-accent-green: #10B981;   /* Green accent */
  --color-accent-blue: #3B82F6;    /* Blue accent */
  
  --color-background: #FFFBF5;     /* Warm cream */
  --color-surface: #FFFFFF;
  --color-surface-alt: #FEF3C7;    /* Light yellow tint */
  
  --color-text-primary: #1F2937;   /* Dark gray */
  --color-text-secondary: #6B7280; /* Medium gray */
  --color-text-light: #9CA3AF;     /* Light gray */
  
  --color-border: #E5E7EB;
  --color-error: #EF4444;
  --color-success: #10B981;
  
  /* Typography */
  --font-family: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* 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);
}

/* ===== DARK THEME ===== */
[data-theme="dark"] {
  /* Colors - Dark mode palette */
  --color-primary: #A78BFA;        /* Lighter purple for dark bg */
  --color-primary-dark: #C4B5FD;
  --color-primary-light: #8B5CF6;
  
  --color-secondary: #F9A8D4;      /* Lighter pink accent */
  --color-secondary-dark: #FBCFE8;
  --color-secondary-light: #EC4899;
  
  --color-accent-green: #34D399;   /* Lighter green */
  --color-accent-blue: #60A5FA;    /* Lighter blue */
  
  --color-background: #111827;     /* Dark gray background */
  --color-surface: #1F2937;        /* Slightly lighter surface */
  --color-surface-alt: #374151;    /* Alternative surface */
  
  --color-text-primary: #F9FAFB;   /* Light text */
  --color-text-secondary: #D1D5DB; /* Medium light gray */
  --color-text-light: #9CA3AF;     /* Gray */
  
  --color-border: #374151;
  --color-error: #F87171;
  --color-success: #34D399;
  
  /* Shadows - adjusted for dark mode */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

/* Loading overlay dark mode */
[data-theme="dark"] #loading-overlay {
  background: rgba(17, 24, 39, 0.9);
}

/* Radio option hover dark mode */
[data-theme="dark"] .radio-option:hover {
  border-color: var(--color-primary-light);
  background: rgba(167, 139, 250, 0.1);
}

[data-theme="dark"] .radio-option.selected {
  border-color: var(--color-primary);
  background: rgba(167, 139, 250, 0.15);
}

/* Checkbox option hover dark mode */
[data-theme="dark"] .checkbox-option:hover {
  border-color: var(--color-primary-light);
  background: rgba(167, 139, 250, 0.1);
}

[data-theme="dark"] .checkbox-option.selected {
  border-color: var(--color-primary);
  background: rgba(167, 139, 250, 0.15);
}

/* ===== GLOBAL STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-4xl);
  color: var(--color-primary);
}

h2 {
  font-size: var(--font-size-3xl);
  color: var(--color-primary);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

.container-wide {
  max-width: 900px;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--spacing-xl);
}

.header {
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.header h1 {
  margin-bottom: var(--spacing-sm);
}

.header p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: var(--font-size-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  font-family: inherit;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-primary);
  color: white;
}

.btn-success {
  background: var(--color-success);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-success:hover:not(:disabled) {
  background: #059669;
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
  display: block;
}

.btn.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ===== FORMS ===== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

input[type="text"],
input[type="password"],
input[type="url"],
select,
textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: var(--font-size-base);
  font-family: inherit;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

input::placeholder {
  color: var(--color-text-light);
}

select {
  cursor: pointer;
}

/* Radio buttons */
.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.radio-option {
  display: flex;
  align-items: center;
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.radio-option:hover {
  border-color: var(--color-primary-light);
  background: rgba(139, 92, 246, 0.05);
}

.radio-option input[type="radio"] {
  width: auto;
  margin-right: var(--spacing-sm);
  cursor: pointer;
}

.radio-option.selected {
  border-color: var(--color-primary);
  background: rgba(139, 92, 246, 0.1);
}

/* Checkbox buttons */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.checkbox-option {
  display: flex;
  align-items: center;
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.checkbox-option:hover {
  border-color: var(--color-primary-light);
  background: rgba(139, 92, 246, 0.05);
}

.checkbox-option input[type="checkbox"] {
  width: auto;
  margin-right: var(--spacing-sm);
  cursor: pointer;
}

.checkbox-option.selected {
  border-color: var(--color-primary);
  background: rgba(139, 92, 246, 0.1);
}

/* ===== TOASTS ===== */
.toast {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  background: var(--color-surface);
  color: var(--color-text-primary);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  z-index: 1000;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-base);
  max-width: 400px;
  font-weight: 500;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-success {
  border-left: 4px solid var(--color-success);
}

.toast-error {
  border-left: 4px solid var(--color-error);
}

.toast-info {
  border-left: 4px solid var(--color-accent-blue);
}

/* ===== LOADING OVERLAY ===== */
#loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(139, 92, 246, 0.2);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

#loading-overlay p {
  margin-top: var(--spacing-lg);
  color: var(--color-text-secondary);
  font-weight: 600;
}

/* ===== LISTS ===== */
.presentation-list {
  list-style: none;
}

.presentation-item {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-fast);
}

.presentation-item:hover {
  border-color: var(--color-primary-light);
  transform: translateX(4px);
}

.presentation-order {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  border-radius: 50%;
  font-weight: 700;
  margin-right: var(--spacing-md);
}

.presentation-name {
  font-weight: 600;
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
}

.presentation-link {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
}

/* Countdown timer */
.countdown-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.countdown-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.countdown-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* ===== UTILITIES ===== */
.text-center {
  text-align: center;
}

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

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.hidden {
  display: none !important;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 1.875rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
  }
  
  .container {
    padding: var(--spacing-md);
  }
  
  .card {
    padding: var(--spacing-lg);
  }
  
  .header {
    padding: var(--spacing-lg) var(--spacing-sm);
  }
  
  .toast {
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    left: var(--spacing-md);
    max-width: none;
  }
}

@media (max-width: 480px) {
  .btn {
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-sm);
  }
}

/* ===== THEME TOGGLE ===== */
.theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  color: var(--color-text-primary);
  font-size: var(--font-size-lg);
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  background: rgba(139, 92, 246, 0.1);
  transform: rotate(20deg);
}

[data-theme="dark"] .theme-toggle:hover {
  background: rgba(167, 139, 250, 0.1);
}

.theme-toggle-icon {
  transition: transform var(--transition-base);
}

/* Navigation / header styling for theme toggle */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  justify-content: center;
  margin-top: var(--spacing-md);
}