/**
 * ShowMyIP Design System
 * Unified design tokens, components, and utilities
 * Version: 2.0
 */

/* ============================================
   DESIGN TOKENS
   ============================================ */

:root {
  /* Colors - Brand */
  --color-primary: #f15a23;
  --color-primary-dark: #d64a1a;
  --color-primary-light: #ff7847;
  --color-primary-alpha: rgba(241, 90, 35, 0.1);
  
  /* Colors - Semantic */
  --color-success: #5cb85c;
  --color-success-dark: #4cae4c;
  --color-danger: #d9534f;
  --color-danger-dark: #c9302c;
  --color-warning: #f0ad4e;
  --color-warning-dark: #ec971f;
  --color-info: #5bc0de;
  --color-info-dark: #46b8da;

  /* Colors - Semantic text tier (WCAG 1.4.3 — ≥4.5:1 on white) */
  --color-success-text: #2e7d32;
  --color-danger-text: #b02a2a;
  --color-warning-text: #8a6500;
  --color-info-text: #0a6b8a;
  
  /* Colors - Neutral */
  --color-gray-50: #f8f9fa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e9ecef;
  --color-gray-300: #ddd;
  --color-gray-400: #adb5bd;
  --color-gray-500: #767676;
  --color-gray-600: #6c757d;
  --color-gray-700: #495057;
  --color-gray-800: #474747;
  --color-gray-900: #212529;
  
  /* Colors - Text */
  --color-text-primary: #212529;
  --color-text-secondary: #6c757d;
  --color-text-muted: #767676;
  --color-text-inverse: #ffffff;
  
  /* Colors - Links */
  --color-link: #0066cc;
  --color-link-hover: #0052a3;
  --color-link-visited: #551a8b;
  
  /* Colors - Background */
  --color-bg-page: #ffffff;
  --color-bg-subtle: #f8f9fa;
  --color-bg-muted: #e9ecef;
  
  /* Typography - Font Families */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-mono: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  /* Typography - Font Sizes */
  --font-size-xs: 0.75rem;      /* 12px */
  --font-size-sm: 0.875rem;     /* 14px */
  --font-size-base: 1rem;        /* 16px */
  --font-size-lg: 1.125rem;      /* 18px */
  --font-size-xl: 1.25rem;       /* 20px */
  --font-size-2xl: 1.5rem;       /* 24px */
  --font-size-3xl: 1.875rem;     /* 30px */
  --font-size-4xl: 2.25rem;      /* 36px */
  
  /* Typography - Line Heights */
  --line-height-tight: 1.25;
  --line-height-base: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Typography - Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing Scale */
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */
  
  /* Border Radius (47) — ONE deliberate scale. --radius is the default. */
  --radius-sm: 4px;
  --radius: 8px;          /* canonical default radius for buttons/cards/inputs */
  --radius-base: 8px;     /* alias of --radius (legacy name kept for existing selectors) */
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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 ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Z-Index Scale */
  --z-base: 1;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* Breakpoints (for reference in media queries) */
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;
  --breakpoint-xxl: 1400px;
  
  /* Accessibility */
  --focus-ring-width: 3px;
  --focus-ring-color: #2196f3;
  --focus-ring-offset: 2px;
  
  /* Touch Targets */
  --touch-target-min: 44px;
  --touch-target-comfortable: 48px;

  /* ============================================
     SURFACE TOKENS (semantic; remapped in dark-mode.css)
     Use these for theme-aware backgrounds/borders/text so dark mode
     only has to override one tier.
     ============================================ */
  --surface-page: var(--color-bg-page);
  --surface-subtle: var(--color-bg-subtle);
  --surface-muted: var(--color-bg-muted);
  --surface-card: var(--color-bg-page);
  --surface-border: var(--color-gray-300);
  --surface-border-strong: var(--color-gray-400);
  --text-default: var(--color-text-primary);
  --text-subtle: var(--color-text-secondary);

  /* ============================================
     CATEGORY TINT COLORS (38, CSS hooks)
     Keyed to the 12 live category slugs. Used by .cat-* classes below.
     ============================================ */
  --cat-dns: #2e7d32;
  --cat-ip: #1565c0;
  --cat-network: #00838f;
  --cat-security: #c62828;
  --cat-developer: #6a1b9a;
  --cat-domain: #ad6800;
  --cat-email: #00695c;
  --cat-browser: #4527a0;
  --cat-content: #ad1457;
  --cat-analysis: #283593;
  --cat-redirect: #d84315;
  --cat-asn-bgp: #37474f;

  /* ============================================
     LEGACY TOKEN ALIASES (27 — token consolidation)
     The legacy :root sets formerly lived in global-styles.css and
     layout.css (now dead/unloaded). Per-tool CSS still references these
     names; alias them to the canonical tokens so they always resolve to
     ONE source of truth instead of nothing.
     ============================================ */
  /* Brand / accent */
  --primary-color: var(--color-primary);
  --primary-brand-color: var(--color-primary);
  --primary-brand-color-darker: var(--color-primary-dark);
  --primary-accent: var(--color-primary);
  --primary-accent-darker: var(--color-primary-dark);
  --primary-hover-color: var(--color-primary-dark);
  --icon-color: var(--color-primary);
  --secondary-color: var(--color-gray-600);

  /* Neutral surfaces (legacy) */
  --secondary-a-color: var(--color-gray-100);
  --secondary-b-color: var(--color-gray-200);
  --secondary-c-color: var(--color-gray-300);
  --background-light: var(--color-bg-page);
  --bg-color: var(--color-bg-subtle);
  --card-bg-color: var(--surface-card);

  /* Text (legacy) */
  --text-color: var(--color-text-primary);
  --primary-text-color: var(--color-text-primary);
  --secondary-text-color: var(--color-text-secondary);
  --light-text-color: var(--color-text-inverse);
  --heading-color: var(--color-text-primary);
  --current-text-color: var(--text-default);
  --current-background-color: var(--surface-page);

  /* Borders (legacy) */
  --border-color: var(--surface-border);
  --current-border-color: var(--surface-border);
  --light-border-color: var(--color-gray-200);
  --medium-border-color: var(--color-gray-300);
  --dark-border-color: var(--color-gray-500);
  --table-border-color: var(--color-gray-300);

  /* Links (legacy) */
  --link-color: var(--color-link);
  --link-hover-color: var(--color-link-hover);
  --link-visited-color: var(--color-link-visited);

  /* Semantic (legacy) */
  --success-color: var(--color-success);
  --success-color-light: #d4edda;
  --warning-color: var(--color-warning);
  --warning-color-light: #fff3cd;
  --error-color: var(--color-danger);
  --error-color-light: #f8d7da;
  --info-color: var(--color-info);
  --info-color-light: #cce5ff;

  /* Typography (legacy) */
  --font-family-primary: var(--font-family-base);
  --font-family-monospace: var(--font-family-mono);
  --font-family-heading: 'Poppins', var(--font-family-base);
  --font-family-body: 'Roboto', var(--font-family-base);
  --font-size-md: var(--font-size-lg);
  --line-height-normal: var(--line-height-base);
  --line-height-loose: var(--line-height-relaxed);

  /* Spacing (legacy --spacing-* → canonical --space-*) */
  --spacing-xs: var(--space-xs);
  --spacing-sm: var(--space-sm);
  --spacing-md: var(--space-md);
  --spacing-lg: var(--space-lg);
  --spacing-xl: var(--space-xl);
  --spacing-2xl: var(--space-2xl);
  --content-section-padding: var(--space-lg);

  /* Radius (legacy) */
  --border-radius: var(--radius);
  --border-radius-small: var(--radius-sm);
  --border-radius-standard: var(--radius);
  --border-radius-large: var(--radius-lg);
  --border-radius-circle: 50%;

  /* Shadow / misc (legacy) */
  --box-shadow: var(--shadow-md);
  --shadow-color: rgba(0, 0, 0, 0.1);
  --max-width: 1200px;

  /* Transition (legacy) */
  --transition-normal: var(--transition-base);

  /* Z-index (legacy) */
  --z-index-dropdown: var(--z-dropdown);
  --z-index-sticky: var(--z-sticky);
  --z-index-fixed: var(--z-fixed);
  --z-index-modal-backdrop: var(--z-modal-backdrop);
  --z-index-modal: var(--z-modal);
  --z-index-tooltip: var(--z-tooltip);
}

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

/* Spacing Utilities */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }
.mt-6 { margin-top: var(--space-2xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }
.mb-6 { margin-bottom: var(--space-2xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-xs); }
.p-2 { padding: var(--space-sm); }
.p-3 { padding: var(--space-md); }
.p-4 { padding: var(--space-lg); }
.p-5 { padding: var(--space-xl); }

/* Text Utilities */
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success-text); }
.text-danger { color: var(--color-danger-text); }
.text-warning { color: var(--color-warning-text); }
.text-info { color: var(--color-info-text); }
.text-muted { color: var(--color-text-muted); }

/* ============================================
   CATEGORY ICON TINTS (38, CSS hooks)
   Apply alongside an icon element (e.g. <i class="tool-icon cat-dns">).
   Tints the icon glyph by category; keyed on category slug.
   ============================================ */
.cat-dns       { color: var(--cat-dns); }
.cat-ip        { color: var(--cat-ip); }
.cat-network   { color: var(--cat-network); }
.cat-security  { color: var(--cat-security); }
.cat-developer { color: var(--cat-developer); }
.cat-domain    { color: var(--cat-domain); }
.cat-email     { color: var(--cat-email); }
.cat-browser   { color: var(--cat-browser); }
.cat-content   { color: var(--cat-content); }
.cat-analysis  { color: var(--cat-analysis); }
.cat-redirect  { color: var(--cat-redirect); }
.cat-asn-bgp   { color: var(--cat-asn-bgp); }

/* Soft tinted icon chip variant (background + glyph) */
.cat-chip { display: inline-flex; align-items: center; justify-content: center; border-radius: var(--radius); }
.cat-chip.cat-dns       { background: color-mix(in srgb, var(--cat-dns) 12%, transparent); }
.cat-chip.cat-ip        { background: color-mix(in srgb, var(--cat-ip) 12%, transparent); }
.cat-chip.cat-network   { background: color-mix(in srgb, var(--cat-network) 12%, transparent); }
.cat-chip.cat-security  { background: color-mix(in srgb, var(--cat-security) 12%, transparent); }
.cat-chip.cat-developer { background: color-mix(in srgb, var(--cat-developer) 12%, transparent); }
.cat-chip.cat-domain    { background: color-mix(in srgb, var(--cat-domain) 12%, transparent); }
.cat-chip.cat-email     { background: color-mix(in srgb, var(--cat-email) 12%, transparent); }
.cat-chip.cat-browser   { background: color-mix(in srgb, var(--cat-browser) 12%, transparent); }
.cat-chip.cat-content   { background: color-mix(in srgb, var(--cat-content) 12%, transparent); }
.cat-chip.cat-analysis  { background: color-mix(in srgb, var(--cat-analysis) 12%, transparent); }
.cat-chip.cat-redirect  { background: color-mix(in srgb, var(--cat-redirect) 12%, transparent); }
.cat-chip.cat-asn-bgp   { background: color-mix(in srgb, var(--cat-asn-bgp) 12%, transparent); }

/* Required-field indicator (WCAG 3.3.2). Apply class to <label>. */
.required-field::after {
  content: " *";
  color: var(--color-danger-text);
  font-weight: var(--font-weight-bold);
  margin-left: 2px;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-weight-normal { font-weight: var(--font-weight-normal); }
.font-weight-medium { font-weight: var(--font-weight-medium); }
.font-weight-semibold { font-weight: var(--font-weight-semibold); }
.font-weight-bold { font-weight: var(--font-weight-bold); }

/* Display Utilities */
.d-none { display: none; }
.d-block { display: block; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }

/* Flex Utilities */
.flex-row { flex-direction: row; }
.flex-column { flex-direction: column; }
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.align-start { align-items: flex-start; }
.align-center { align-items: center; }
.align-end { align-items: flex-end; }
.gap-1 { gap: var(--space-xs); }
.gap-2 { gap: var(--space-sm); }
.gap-3 { gap: var(--space-md); }
.gap-4 { gap: var(--space-lg); }

/* ============================================
   COMPONENT PATTERNS
   ============================================ */

/* Lead Text */
.lead {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

/* Cards */
.card {
  background: var(--color-bg-page);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-lg);
}

.card-header {
  padding: var(--space-md) var(--space-lg);
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-300);
  font-weight: var(--font-weight-semibold);
}

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

.card-footer {
  padding: var(--space-md) var(--space-lg);
  background: var(--color-gray-50);
  border-top: 1px solid var(--color-gray-300);
}

/* Alerts */
.alert {
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-lg);
  border: 1px solid transparent;
  border-radius: var(--radius-base);
  position: relative;
}

.alert-success {
  color: #155724;
  background-color: #d4edda;
  border-color: #c3e6cb;
}

.alert-danger {
  color: #721c24;
  background-color: #f8d7da;
  border-color: #f5c6cb;
}

.alert-warning {
  color: #856404;
  background-color: #fff3cd;
  border-color: #ffeaa7;
}

.alert-info {
  color: #004085;
  background-color: #cce5ff;
  border-color: #b8daff;
}

/* Loading Indicator */
.loading-indicator {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-text-secondary);
}

.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: var(--space-md);
}

.progress-bar .progress {
  height: 100%;
  background: var(--color-primary);
  animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
  0% { width: 0; }
  50% { width: 70%; }
  100% { width: 100%; }
}

/* Breadcrumb */
.breadcrumb-nav {
  margin-bottom: var(--space-lg);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  padding: var(--space-sm) 0;
  margin-bottom: 0;
  list-style: none;
  font-size: var(--font-size-sm);
}

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin: 0 var(--space-sm);
  color: var(--color-gray-500);
}

.breadcrumb a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

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

/* Tables */
.table {
  width: 100%;
  margin-bottom: var(--space-lg);
  border-collapse: collapse;
}

.table th,
.table td {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-gray-300);
}

.table th {
  font-weight: var(--font-weight-semibold);
  background: var(--color-gray-50);
  color: var(--color-text-primary);
}

.table-bordered {
  border: 1px solid var(--color-gray-300);
}

.table-bordered th,
.table-bordered td {
  border: 1px solid var(--color-gray-300);
}

.table-sm th,
.table-sm td {
  padding: var(--space-xs) var(--space-sm);
}

/* ============================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================ */

/* Focus Visible - Enhanced for keyboard users */
*:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  box-shadow: 0 0 0 var(--focus-ring-offset) var(--color-bg-page),
              0 0 0 calc(var(--focus-ring-offset) + var(--focus-ring-width)) var(--focus-ring-color);
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #d64a1a;
    --color-gray-300: #999;
  }
  
  .btn {
    border-width: 2px;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

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

@media (max-width: 767px) {
  .d-sm-none { display: none; }
  .d-sm-block { display: block; }
  .text-sm-center { text-align: center; }
}

@media (min-width: 768px) and (max-width: 991px) {
  .d-md-none { display: none; }
  .d-md-block { display: block; }
}

@media (min-width: 992px) {
  .d-lg-none { display: none; }
  .d-lg-block { display: block; }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .no-print {
    display: none !important;
  }
  
  .print-only {
    display: block !important;
  }
  
  a[href]::after {
    content: " (" attr(href) ")";
  }
}