/**
 * RMRR Forms - Main Style Guide
 * Mobile-first design for modern smartphones
 * Last updated: 2025
 */

/* ============================================
   CSS RESET & BASE
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ============================================
   CSS VARIABLES - LIGHT MODE (DEFAULT)
   ============================================ */
:root {
  /* Colors - Backgrounds */
  --color-bg-page: #f5f5f5;
  --color-bg-container: #ffffff;
  --color-bg-elevated: #ffffff;

  /* Colors - Text */
  --color-text-primary: #2c3e50;
  --color-text-secondary: #4a5568;
  --color-text-muted: #6b7280;
  --color-text-inverse: #ffffff;

  /* Colors - Borders */
  --color-border-light: #e0e0e0;
  --color-border-medium: #d1d5db;
  --color-border-dark: #9ca3af;

  /* Colors - Buttons */
  --color-btn-primary: #2194dd;
  --color-btn-primary-hover: #1a7bc2;
  --color-btn-primary-active: #156199;

  --color-btn-secondary: #6b7280;
  --color-btn-secondary-hover: #4b5563;
  --color-btn-secondary-active: #374151;

  --color-btn-success: #10b981;
  --color-btn-success-hover: #059669;
  --color-btn-success-active: #047857;

  --color-btn-danger: #ef4444;
  --color-btn-danger-hover: #dc2626;
  --color-btn-danger-active: #b91c1c;

  /* Colors - States */
  --color-error: #ef4444;
  --color-error-bg: #fee2e2;
  --color-warning: #f59e0b;
  --color-warning-bg: #fef3c7;
  --color-success: #10b981;
  --color-success-bg: #d1fae5;
  --color-info: #3b82f6;
  --color-info-bg: #dbeafe;

  /* Spacing Scale (mobile-first) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 20px;
  --space-2xl: 24px;
  --space-3xl: 32px;
  --space-4xl: 40px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 15px;
  --font-size-lg: 18px;
  --font-size-xl: 22px;
  --font-size-2xl: 28px;
  --font-size-3xl: 32px;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

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

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 20px 25px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;

  /* Touch Targets (minimum for mobile) */
  --touch-target-min: 44px;

  /* Z-index Scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 900;
  --z-modal: 1000;
  --z-toast: 1100;
}

/* ============================================
   CSS VARIABLES - DARK MODE
   ============================================ */
html.dark-mode {
  /* Colors - Backgrounds */
  --color-bg-page: #1a1a1a;
  --color-bg-container: #2d2d2d;
  --color-bg-elevated: #3d3d3d;

  /* Colors - Text */
  --color-text-primary: #e0e0e0;
  --color-text-secondary: #d1d5db;
  --color-text-muted: #9ca3af;
  --color-text-inverse: #1a1a1a;

  /* Colors - Borders */
  --color-border-light: #404040;
  --color-border-medium: #525252;
  --color-border-dark: #737373;

  /* Colors - Buttons (adjusted for dark mode visibility) */
  --color-btn-primary: #60a5fa;
  --color-btn-primary-hover: #3b82f6;
  --color-btn-primary-active: #2563eb;

  --color-btn-secondary: #6b7280;
  --color-btn-secondary-hover: #9ca3af;
  --color-btn-secondary-active: #d1d5db;

  --color-btn-success: #34d399;
  --color-btn-success-hover: #10b981;
  --color-btn-success-active: #059669;

  --color-btn-danger: #f87171;
  --color-btn-danger-hover: #ef4444;
  --color-btn-danger-active: #dc2626;

  /* Colors - States */
  --color-error: #f87171;
  --color-error-bg: #450a0a;
  --color-warning: #fbbf24;
  --color-warning-bg: #451a03;
  --color-success: #34d399;
  --color-success-bg: #022c22;
  --color-info: #60a5fa;
  --color-info-bg: #172554;

  /* Shadows (subtler in dark mode) */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-2xl: 0 20px 25px rgba(0, 0, 0, 0.6);
}

/* ============================================
   BASE ELEMENTS
   ============================================ */
html {
  background: var(--color-bg-page);
  font-size: 16px; /* Base for rem units */
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-page);
  min-height: 100vh;
  padding: var(--space-xl);
  margin: 0;
  transition: background-color var(--transition-slow),
    color var(--transition-slow);

  /* Improve text rendering on mobile */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  /* Prevent text size adjustment on orientation change */
  -webkit-text-size-adjust: 100%;
}

/* ============================================
   CONTAINER PATTERNS
   ============================================ */
.container {
  background: var(--color-bg-container);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-2xl);
  transition: background-color var(--transition-slow),
    color var(--transition-slow);
}

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

.container-narrow {
  max-width: 600px;
}

.logo-container img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-lg);
}

h1 {
  font-size: var(--font-size-2xl);
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: var(--space-2xl);
}

h2 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-lg);
}

h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
}

p {
  margin-bottom: var(--space-lg);
}

/* Help text / descriptions */
.help-text,
.description-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
  margin-top: var(--space-xs);
}

/* ============================================
   SECTION DIVIDERS
   ============================================ */
hr {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin: var(--space-4xl) 0;
}

.section {
  margin-bottom: var(--space-3xl);
  padding-bottom: 0; /* Remove padding-bottom */
  border-bottom: none; /* Remove border-bottom */
}

.section:last-child {
  margin-bottom: 0;
}

.section + .section {
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border-light);
}

.section-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xl);
}

/* ============================================
   CONTENT SPACING
   ============================================ */
.content {
  padding: var(--space-2xl);
}

.content-section {
  margin-bottom: var(--space-3xl);
}

/* ============================================
   RESPONSIVE HELPERS
   ============================================ */
/* Small phones */
@media (max-width: 360px) {
  body {
    padding: var(--space-md);
  }

  .container {
    padding: var(--space-lg);
  }

  h1 {
    font-size: var(--font-size-xl);
    padding: var(--space-xl) var(--space-md);
  }
}

/* Large phones and tablets */
@media (min-width: 768px) {
  body {
    padding: var(--space-3xl);
  }

  .container {
    padding: var(--space-3xl);
  }
}