/* =============================================
   DevToolkit - CSS Custom Properties & Base Styles
   ============================================= */

/* --- Light Theme (Default) --- */
:root {
  /* Colors */
  --color-background: #ffffff;
  --color-background-secondary: #f8f9fa;
  --color-text: #1a1a2e;
  --color-text-secondary: #555770;
  --color-primary: #3b55db;
  --color-primary-hover: #2f48c4;
  --color-secondary: #7209b7;
  --color-secondary-hover: #5f0a9e;
  --color-border: #dee2e6;
  --color-input: #ffffff;
  --color-input-border: #ced4da;
  --color-card: #ffffff;
  --color-card-shadow: rgba(0, 0, 0, 0.08);
  --color-success: #2dc653;
  --color-warning: #f5a623;
  --color-error: #e63946;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono',
    'Courier New', monospace;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

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

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  /* Layout */
  --max-width: 1200px;
  --header-height: 64px;
}

/* --- Dark Theme --- */
[data-theme='dark'] {
  --color-background: #0f0f23;
  --color-background-secondary: #1a1a2e;
  --color-text: #e6e6f0;
  --color-text-secondary: #a0a0b8;
  --color-primary: #6d83f2;
  --color-primary-hover: #5a72e0;
  --color-secondary: #9b4dca;
  --color-secondary-hover: #b366d9;
  --color-border: #2d2d44;
  --color-input: #1a1a2e;
  --color-input-border: #3d3d5c;
  --color-card: #1a1a2e;
  --color-card-shadow: rgba(0, 0, 0, 0.3);
  --color-success: #3dd68c;
  --color-warning: #f5c542;
  --color-error: #ff6b7a;
}

/* =============================================
   CSS Reset / Normalize
   ============================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  background-color: var(--color-background);
  color: var(--color-text);
}

img,
svg {
  max-width: 100%;
  display: block;
}

/* =============================================
   Typography
   ============================================= */

h1,
h2,
h3,
h4 {
  margin: 0 0 var(--spacing-md);
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: var(--font-size-2xl);
}

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

h3 {
  font-size: var(--font-size-lg);
}

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

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

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

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

code,
pre {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
}

code {
  background-color: var(--color-background-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
}

pre {
  background-color: var(--color-background-secondary);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  overflow-x: auto;
}

pre code {
  background-color: transparent;
  padding: 0;
}

/* =============================================
   Layout
   ============================================= */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* =============================================
   Search Bar
   ============================================= */

.search-bar {
  margin-bottom: var(--spacing-lg);
}

.search-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-input);
  border: 1px solid var(--color-input-border);
  border-radius: var(--border-radius);
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* =============================================
   Responsive Grid
   ============================================= */

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.tool-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  box-shadow: 0 2px 8px var(--color-card-shadow);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.tool-card:hover {
  box-shadow: 0 4px 16px var(--color-card-shadow);
  transform: translateY(-2px);
}

/* =============================================
   Utility Classes
   ============================================= */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.flex {
  display: flex;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-center {
  justify-content: center;
}

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

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

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

/* =============================================
   Tool Page Layout
   ============================================= */

.tool-page {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.tool-input-panel {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.tool-output-panel {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  min-width: 0;
}

.tool-description {
  margin-top: var(--spacing-lg);
  line-height: 1.7;
}

.tool-description h2 {
  margin-bottom: var(--spacing-sm);
}

.tool-description h3 {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.tool-description ul {
  padding-left: var(--spacing-lg);
}

.tool-description li {
  margin-bottom: var(--spacing-sm);
}

/* =============================================
   Textarea Styles
   ============================================= */

.tool-textarea {
  width: 100%;
  min-height: 200px;
  padding: var(--spacing-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-input);
  border: 1px solid var(--color-input-border);
  border-radius: var(--border-radius);
  resize: vertical;
  transition: border-color var(--transition-fast);
}

.tool-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* =============================================
   Button Styles
   ============================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  min-height: 44px;
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  font-weight: 600;
  line-height: 1.5;
  border: 1px solid transparent;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-primary:active {
  transform: scale(0.97);
}

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

.btn-secondary:hover {
  background-color: var(--color-background-secondary);
  border-color: var(--color-primary);
}

.btn-secondary:active {
  transform: scale(0.97);
}

.btn-icon {
  padding: var(--spacing-sm);
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn-icon:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* Focus visible styles for keyboard navigation */
.btn:focus-visible,
.tool-textarea:focus-visible,
input:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* =============================================
   Header Styles
   ============================================= */

.site-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  max-width: var(--max-width);
  margin: 0 auto;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

.site-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.site-logo:hover {
  color: var(--color-primary-hover);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* =============================================
   Navigation Styles
   ============================================= */

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.site-nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-nav a:hover {
  color: var(--color-primary);
}

.site-nav a.active {
  color: var(--color-primary);
  background-color: var(--color-background-secondary);
  font-weight: 600;
}

/* =============================================
   Footer Styles
   ============================================= */

.site-footer {
  padding: var(--spacing-2xl) var(--spacing-md);
  border-top: 1px solid var(--color-border);
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.footer-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-affiliate {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.footer-affiliate a {
  color: var(--color-primary);
}

.footer-affiliate a:hover {
  color: var(--color-primary-hover);
}

.footer-copyright {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

/* =============================================
   Related Tools Section
   ============================================= */

.related-tools-section {
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-xl);
}

.related-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--spacing-lg);
}

.related-tool-card {
  display: block;
  padding: var(--spacing-lg);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.related-tool-card:hover {
  box-shadow: 0 4px 16px var(--color-card-shadow);
  transform: translateY(-2px);
}

.related-tool-name {
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.related-tool-desc {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

/* =============================================
   Responsive Breakpoints
   ============================================= */

@media (max-width: 768px) {
  .tool-page {
    grid-template-columns: 1fr;
  }

  .site-nav {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .site-header {
    height: auto;
    min-height: var(--header-height);
    flex-wrap: wrap;
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .related-tools-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }
}

@media (max-width: 480px) {
  .tool-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  .footer-links {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .footer-affiliate {
    flex-direction: column;
  }

  .related-tools-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 320px) {
  .tool-textarea {
    min-height: 120px;
    font-size: var(--font-size-sm);
  }

  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }

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

  .container {
    padding: 0 var(--spacing-xs);
  }
}

/* =============================================
   Toast Notifications
   ============================================= */

.toast {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  min-width: 250px;
  max-width: 400px;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 10000;
  animation: toast-slide-in var(--transition-base) ease forwards;
}

.toast-success {
  background-color: var(--color-success);
}

.toast-error {
  background-color: var(--color-error);
}

.toast-info {
  background-color: var(--color-primary);
}

@keyframes toast-slide-in {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* =============================================
   JSON Syntax Highlighting
   ============================================= */

.json-output-highlight {
  width: 100%;
  min-height: 200px;
  padding: var(--spacing-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-input);
  border: 1px solid var(--color-input-border);
  border-radius: var(--border-radius);
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: break-word;
  word-break: break-all;
  margin: 0;
}

/* Light theme syntax colors */
.json-key { color: #881391; }
.json-string { color: #0b7fc7; }
.json-number { color: #1a8f29; }
.json-boolean { color: #c41a16; }
.json-null { color: #808080; }
.json-bracket { color: #333333; }

/* Dark theme syntax colors */
[data-theme='dark'] .json-key { color: #c792ea; }
[data-theme='dark'] .json-string { color: #c3e88d; }
[data-theme='dark'] .json-number { color: #f78c6c; }
[data-theme='dark'] .json-boolean { color: #ff5370; }
[data-theme='dark'] .json-null { color: #808080; }
[data-theme='dark'] .json-bracket { color: #89ddff; }

/* JSON error display */
.json-error {
  color: var(--color-error);
  border-color: var(--color-error);
}

/* Warning Box */
.warning-box {
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: #fff3cd;
  border: 1px solid #ffc107;
  border-left: 4px solid #ffc107;
  border-radius: var(--border-radius);
  color: #664d03;
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

[data-theme='dark'] .warning-box {
  background-color: #332701;
  border-color: #ffc107;
  color: #ffd95e;
}

/* Ad container placeholders - CLS prevention */
.ad-container {
  min-height: 90px;
  margin: var(--spacing-lg, 2rem) 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-secondary, #f5f5f5);
  border-radius: var(--radius, 0.5rem);
}

.ad-container-large {
  min-height: 250px;
}

[data-theme='dark'] .ad-container {
  background: var(--color-bg-secondary, #2d2d2d);
}

/* =============================================
   Print Styles
   ============================================= */

@media print {
  .site-header,
  .site-footer,
  .ad-container,
  .btn,
  .theme-toggle,
  .search-bar,
  #related-tools,
  .toast {
    display: none !important;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  .tool-page {
    grid-template-columns: 1fr;
  }

  .tool-textarea,
  pre {
    border: 1px solid #ccc;
    white-space: pre-wrap;
    word-break: break-all;
  }
}