/* ====================================
   RELEASY NOTES DESIGN TOKENS
   ==================================== */

:root {
  /* Primary Gradient Colors */
  --rn-primary-1: #2563EB; /* Blue */
  --rn-primary-2: #4F46E5; /* Indigo */
  --rn-primary-3: #7C3AED; /* Purple */
  
  /* Background & Surface */
  --rn-bg: #FFFFFF;
  --rn-surface: #F9FAFB;
  --rn-surface-elevated: #FFFFFF;
  
  /* Text Colors */
  --rn-text: #111827;
  --rn-text-muted: #6B7280;
  --rn-text-on-primary: #FFFFFF;
  
  /* Borders */
  --rn-border: #E5E7EB;
  --rn-border-focus: var(--rn-primary-2);
  
  /* Radius */
  --rn-radius-1: 12px;
  --rn-radius-2: 16px;
  --rn-radius-3: 8px;
  
  /* Spacing */
  --rn-spacing-1: 4px;
  --rn-spacing-2: 8px;
  --rn-spacing-3: 12px;
  --rn-spacing-4: 16px;
  --rn-spacing-5: 24px;
  --rn-spacing-6: 32px;
  --rn-spacing-7: 48px;
  --rn-spacing-8: 64px;
  
  /* Shadow */
  --rn-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --rn-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  
  /* Gradient */
  --rn-gradient: linear-gradient(135deg, var(--rn-primary-1) 0%, var(--rn-primary-2) 50%, var(--rn-primary-3) 100%);
  
  /* Status Colors */
  --rn-success: #10B981;
  --rn-error: #EF4444;
  --rn-warning: #F59E0B;
}

[data-theme="dark"] {
  /* Background & Surface */
  --rn-bg: #0B1026;
  --rn-surface: #1a1f3a;
  --rn-surface-elevated: #242b4d;
  
  /* Text Colors */
  --rn-text: #FFFFFF;
  --rn-text-muted: #9CA3AF;
  
  /* Borders */
  --rn-border: #374151;
  
  /* Shadow (more subtle in dark mode) */
  --rn-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
  --rn-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
}

/* ====================================
   BASE STYLES
   ==================================== */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Roboto", "Inter", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--rn-text);
  background-color: var(--rn-bg);
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--rn-spacing-4) 0;
  font-weight: 600;
  line-height: 1.2;
  color: var(--rn-text);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin: 0 0 var(--rn-spacing-4) 0;
}

a {
  color: var(--rn-primary-2);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.8;
}

a:focus-visible {
  outline: 2px solid var(--rn-border-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

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

.rn-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--rn-spacing-5);
}

.rn-section {
  padding: var(--rn-spacing-8) 0;
}

.rn-card {
  background: var(--rn-surface-elevated);
  border: 1px solid var(--rn-border);
  border-radius: var(--rn-radius-2);
  padding: var(--rn-spacing-6);
  box-shadow: var(--rn-shadow);
  transition: all 0.3s ease;
}

.rn-card:hover {
  box-shadow: var(--rn-shadow-lg);
  transform: translateY(-2px);
}

/* ====================================
   BUTTONS
   ==================================== */

.rn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--rn-spacing-3) var(--rn-spacing-6);
  font-size: 1rem;
  font-weight: 500;
  border: none;
  border-radius: var(--rn-radius-1);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  gap: var(--rn-spacing-2);
}

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

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

.rn-btn-primary {
  background: var(--rn-gradient);
  color: var(--rn-text-on-primary);
}

.rn-btn-primary:hover:not(:disabled) {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--rn-shadow);
}

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

.rn-btn-secondary:hover:not(:disabled) {
  background: var(--rn-primary-2);
  color: var(--rn-text-on-primary);
}

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

.rn-btn-ghost:hover:not(:disabled) {
  background: var(--rn-surface);
}

/* ====================================
   FORMS
   ==================================== */

.rn-form-group {
  margin-bottom: var(--rn-spacing-5);
}

.rn-label {
  display: block;
  margin-bottom: var(--rn-spacing-2);
  font-weight: 500;
  color: var(--rn-text);
}

.rn-input,
.rn-textarea {
  width: 100%;
  padding: var(--rn-spacing-3) var(--rn-spacing-4);
  font-size: 1rem;
  font-family: inherit;
  color: var(--rn-text);
  background: var(--rn-bg);
  border: 1px solid var(--rn-border);
  border-radius: var(--rn-radius-3);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.rn-input:focus,
.rn-textarea:focus {
  outline: none;
  border-color: var(--rn-border-focus);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.rn-input.error,
.rn-textarea.error {
  border-color: var(--rn-error);
}

.rn-textarea {
  min-height: 120px;
  resize: vertical;
}

.rn-error-message {
  display: block;
  margin-top: var(--rn-spacing-2);
  font-size: 0.875rem;
  color: var(--rn-error);
}

.rn-checkbox-wrapper {
  display: flex;
  align-items: flex-start;
  gap: var(--rn-spacing-2);
}

.rn-checkbox {
  margin-top: 4px;
}

/* ====================================
   RESPONSIVE
   ==================================== */

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .rn-container {
    padding: 0 var(--rn-spacing-4);
  }
  
  .rn-section {
    padding: var(--rn-spacing-6) 0;
  }
  
  .rn-card {
    padding: var(--rn-spacing-5);
  }
}