/* ================================================
   TOOLSFY - Professional Tools Website Stylesheet
   ================================================ */

/* CSS Variables */
:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-muted: #a1a1aa;
  --bg-primary: #ffffff;
  --bg-secondary: #f4f4f5;
  --bg-tertiary: #fafafa;
  --border-color: #e4e4e7;
  --border-light: #f4f4f5;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  --transition: all 0.2s ease;
}

/* Dark mode */
[data-theme="dark"] {
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --bg-primary: #09090b;
  --bg-secondary: #18181b;
  --bg-tertiary: #27272a;
  --border-color: #27272a;
  --border-light: #3f3f46;
  --primary-light: rgba(79, 70, 229, 0.2);
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

@media (max-width: 768px) {
  h1 { font-size: 1.875rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .container { padding: 0 1.5rem; }
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .header.scrolled {
  background: rgba(9, 9, 11, 0.95);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  background: linear-gradient(135deg, var(--primary), #4338ca);
  border-radius: var(--radius-xl);
  color: white;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-name {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  color: var(--text-primary);
}

.logo-tagline {
  font-size: 0.625rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--primary);
}

/* Navigation */
.nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .nav { display: flex; }
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--text-primary);
}

/* Search Bar */
.search-wrapper {
  position: relative;
  flex: 1;
  max-width: 28rem;
  display: none;
}

@media (min-width: 768px) {
  .search-wrapper { display: block; }
}

.search-input {
  width: 100%;
  height: 2.5rem;
  padding: 0 1rem 0 2.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  background: var(--bg-primary);
  border-color: var(--text-primary);
  box-shadow: 0 0 0 4px rgba(24, 24, 27, 0.05);
}

[data-theme="dark"] .search-input:focus {
  box-shadow: 0 0 0 4px rgba(250, 250, 250, 0.05);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: var(--transition);
}

.icon-btn:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.btn-primary {
  display: none;
  align-items: center;
  justify-content: center;
  height: 2.5rem;
  padding: 0 1.5rem;
  background: var(--text-primary);
  color: var(--bg-primary);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

@media (min-width: 640px) {
  .btn-primary { display: flex; }
}

.btn-primary:hover {
  transform: scale(1.05);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: flex;
}

@media (min-width: 1024px) {
  .mobile-menu-btn { display: none; }
}

.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  padding: 1rem;
  display: none;
}

.mobile-menu.active {
  display: block;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  height: 3rem;
  padding: 0 1rem;
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}

.mobile-nav-link:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* Hero Section */
.hero {
  position: relative;
  background: var(--bg-primary);
  padding: 4rem 0 6rem;
  border-bottom: 1px solid var(--border-color);
  text-align: center;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(45rem 50rem at center top, var(--bg-secondary), transparent);
  opacity: 0.4;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .hero-title { font-size: 3.75rem; }
}

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

.hero-subtitle {
  max-width: 42rem;
  margin: 0 auto 2.5rem;
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.hero-search {
  position: relative;
  max-width: 42rem;
  margin: 0 auto;
}

.hero-search-input {
  width: 100%;
  height: 4rem;
  padding: 0 1.5rem 0 3.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  font-size: 1.125rem;
  color: var(--text-primary);
  box-shadow: var(--shadow-xl);
  outline: none;
  transition: var(--transition);
}

.hero-search-input:focus {
  border-color: var(--text-primary);
  box-shadow: var(--shadow-xl), 0 0 0 4px rgba(24, 24, 27, 0.05);
}

[data-theme="dark"] .hero-search-input:focus {
  box-shadow: var(--shadow-xl), 0 0 0 4px rgba(250, 250, 250, 0.05);
}

.hero-search-input::placeholder {
  color: var(--text-muted);
}

.hero-search-icon {
  position: absolute;
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.hero-tag {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: var(--text-primary);
  color: var(--bg-primary);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.hero-tag:hover {
  transform: scale(1.05);
}

.hero-tag.secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

/* Main Layout */
.main-content {
  flex: 1;
  padding: 3rem 0;
}

.layout-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .layout-grid {
    grid-template-columns: 1fr 300px;
  }
}

/* Category Filter */
.category-filter {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin-bottom: 2rem;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.category-filter::-webkit-scrollbar {
  display: none;
}

.category-btn {
  white-space: nowrap;
  padding: 0.625rem 1.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.category-btn:hover,
.category-btn.active {
  background: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

/* Section Headers */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: #fef3c7;
  color: #d97706;
  border-radius: var(--radius-xl);
}

.section-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}

.section-link:hover {
  color: var(--text-primary);
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .tools-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Tool Card */
.tool-card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  transition: var(--transition);
}

.tool-card:hover {
  border-color: var(--text-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.tool-card-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.tool-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-xl);
  flex-shrink: 0;
}

.tool-meta {
  flex: 1;
}

.tool-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.tool-category {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.tool-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  flex: 1;
}

.tool-badges {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
}

.badge-popular {
  background: #fef3c7;
  color: #d97706;
}

.badge-new {
  background: #dcfce7;
  color: #16a34a;
}

/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-card {
  padding: 1.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
}

.sidebar-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}

.sidebar-link:hover,
.sidebar-link.active {
  background: var(--text-primary);
  color: var(--bg-primary);
}

.trending-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.trending-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.trending-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--bg-secondary);
  color: var(--text-muted);
  border-radius: var(--radius-lg);
  flex-shrink: 0;
  transition: var(--transition);
}

.trending-item:hover .trending-icon {
  background: var(--primary-light);
  color: var(--primary);
}

.trending-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.trending-cat {
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* Newsletter Card */
.newsletter-card {
  padding: 1.5rem;
  background: var(--primary);
  border-radius: var(--radius-2xl);
  color: white;
}

.newsletter-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.newsletter-text {
  font-size: 0.875rem;
  opacity: 0.9;
  margin-bottom: 1rem;
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.newsletter-input {
  width: 100%;
  padding: 0.625rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-xl);
  color: white;
  font-size: 0.875rem;
  outline: none;
}

.newsletter-input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.newsletter-input:focus {
  background: rgba(255, 255, 255, 0.2);
}

.newsletter-btn {
  width: 100%;
  padding: 0.625rem 1rem;
  background: white;
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-xl);
  transition: var(--transition);
}

.newsletter-btn:hover {
  transform: scale(0.98);
}

/* Tool Page */
.tool-page {
  padding: 3rem 0;
  background: var(--bg-secondary);
  min-height: 100vh;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

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

.tool-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .tool-layout {
    grid-template-columns: 2fr 1fr;
  }
}

.tool-main {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.tool-box {
  padding: 2rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-sm);
}

.tool-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.tool-header-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-2xl);
}

.tool-header-info {
  flex: 1;
}

.tool-header-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

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

/* Form Elements */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.form-textarea {
  width: 100%;
  min-height: 16rem;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  resize: vertical;
  outline: none;
  transition: var(--transition);
}

.form-textarea:focus {
  background: var(--bg-primary);
  border-color: var(--primary);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  font-size: 1rem;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
}

.form-input:focus {
  background: var(--bg-primary);
  border-color: var(--primary);
}

.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  outline: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-xl);
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

.btn-action {
  background: var(--primary);
  color: white;
  box-shadow: var(--shadow-lg), 0 4px 14px rgba(79, 70, 229, 0.25);
}

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

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
}

.btn-text {
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
}

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

.btn-danger {
  color: var(--error);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.1);
}

/* Action Bar */
.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  margin-top: 1.5rem;
}

/* Stats Row */
.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Button Grid */
.btn-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .btn-grid { grid-template-columns: repeat(4, 1fr); }
}

/* Result Box */
.result-box {
  padding: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-primary);
  word-break: break-all;
  white-space: pre-wrap;
}

.result-box.mono {
  font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
}

.result-box.dark {
  background: #18181b;
  color: #f4f4f5;
}

.result-box.code {
  background: #1e1e1e;
  color: #10b981;
}

/* Output Display */
.output-display {
  min-height: 12rem;
  padding: 2rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

.output-display.large {
  font-size: 4rem;
  font-weight: 900;
}

.output-display.mono {
  font-family: 'Monaco', 'Menlo', monospace;
}

/* FAQ Section */
.faq-section {
  margin-top: 2rem;
}

.faq-item {
  padding: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  margin-bottom: 1rem;
}

.faq-question {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.faq-answer {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* Related Tools */
.related-tools {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.related-tool {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.related-tool-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--bg-secondary);
  color: var(--text-muted);
  border-radius: var(--radius-lg);
  flex-shrink: 0;
  transition: var(--transition);
}

.related-tool:hover .related-tool-icon {
  background: var(--primary-light);
  color: var(--primary);
}

.related-tool-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}

.related-tool:hover .related-tool-name {
  color: var(--primary);
}

/* CTA Card */
.cta-card {
  padding: 2rem;
  background: var(--primary);
  border-radius: var(--radius-2xl);
  color: white;
  text-align: center;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

.cta-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.cta-text {
  font-size: 0.9375rem;
  opacity: 0.9;
  margin-bottom: 1.5rem;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.75rem 1.5rem;
  background: white;
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-xl);
  transition: var(--transition);
}

.cta-btn:hover {
  transform: scale(1.02);
}

/* Footer */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

.footer-brand {
  max-width: 28rem;
}

.footer-about {
  color: var(--text-secondary);
  margin: 1.5rem 0;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  transition: var(--transition);
}

.social-link:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.footer-title {
  font-size: 0.875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-copy {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-info {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-info a,
.footer-info span {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

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

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: var(--text-primary);
  color: var(--bg-primary);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 40;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
}

/* Empty State */
.empty-state {
  padding: 5rem 2rem;
  text-align: center;
  background: var(--bg-primary);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-color);
}

.empty-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 5rem;
  height: 5rem;
  margin: 0 auto 1.5rem;
  background: var(--bg-secondary);
  color: var(--text-muted);
  border-radius: var(--radius-full);
}

.empty-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

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

/* Featured Section */
.featured-section {
  position: relative;
  padding: 3rem;
  background: #18181b;
  border-radius: var(--radius-2xl);
  color: white;
  overflow: hidden;
  margin: 3rem 0;
}

@media (min-width: 768px) {
  .featured-section { padding: 4rem; }
}

.featured-section::before {
  content: '';
  position: absolute;
  top: -5rem;
  right: -5rem;
  width: 16rem;
  height: 16rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  filter: blur(3rem);
}

.featured-content {
  position: relative;
  z-index: 1;
}

.featured-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(255, 255, 255, 0.1);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.featured-title {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  .featured-title { font-size: 2.5rem; }
}

.featured-text {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.125rem;
  margin-bottom: 2rem;
  max-width: 32rem;
}

.featured-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background: white;
  color: #18181b;
  font-size: 1.125rem;
  font-weight: 600;
  border-radius: var(--radius-xl);
  transition: var(--transition);
}

.featured-btn:hover {
  transform: scale(1.05);
}

/* Info Section */
.info-section {
  padding: 3rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  margin: 3rem 0;
}

@media (min-width: 768px) {
  .info-section { padding: 4rem; }
}

.info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 768px) {
  .info-grid { grid-template-columns: repeat(2, 1fr); }
}

.info-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.info-text {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.info-list {
  list-style: none;
}

.info-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.info-list li svg {
  color: var(--success);
  flex-shrink: 0;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.category-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.category-item::before {
  content: '';
  width: 0.375rem;
  height: 0.375rem;
  background: var(--text-primary);
  border-radius: 50%;
}

/* Static Pages */
.static-page {
  padding: 4rem 0;
  background: var(--bg-secondary);
}

.static-page-content {
  max-width: 48rem;
  margin: 0 auto;
  padding: 3rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
}

.static-page-content h1 {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 2rem;
}

.static-page-content h2 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.static-page-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.static-page-content ul, 
.static-page-content ol {
  color: var(--text-secondary);
  margin: 1rem 0;
  padding-left: 2rem;
}

.static-page-content li {
  margin-bottom: 0.5rem;
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  background: var(--text-primary);
  color: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

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

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

/* Color Picker Specific */
.color-preview {
  width: 100%;
  height: 16rem;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-color);
}

.color-picker-input {
  width: 100%;
  height: 4rem;
  padding: 0;
  border: none;
  border-radius: var(--radius-2xl);
  cursor: pointer;
}

.color-values {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.color-value-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
}

.color-value-label {
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.color-value-text {
  font-size: 1.25rem;
  font-weight: 900;
}

/* Calculator Specific */
.calc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

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

.calc-input-section {
  padding: 2rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-color);
}

.calc-result-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: var(--bg-primary);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  min-height: 300px;
}

.calc-result-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.calc-result-value {
  font-size: 4rem;
  font-weight: 900;
  color: var(--primary);
}

/* Unit Toggle */
.unit-toggle {
  display: flex;
  padding: 0.25rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-2xl);
  width: fit-content;
  margin: 0 auto 2rem;
}

.unit-btn {
  padding: 0.5rem 2rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-xl);
  color: var(--text-secondary);
  transition: var(--transition);
}

.unit-btn.active {
  background: var(--bg-primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* Range Input */
input[type="range"] {
  width: 100%;
  height: 0.5rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  appearance: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
}

/* Checkbox */
.checkbox-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  cursor: pointer;
  transition: var(--transition);
}

.checkbox-label:hover {
  background: var(--bg-tertiary);
}

.checkbox-label input {
  width: 1.25rem;
  height: 1.25rem;
  accent-color: var(--primary);
}

.checkbox-text {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Password Generator Specific */
.password-display {
  padding: 3rem;
  background: #18181b;
  border-radius: var(--radius-2xl);
  text-align: center;
  color: white;
  position: relative;
}

.password-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 1rem;
}

.password-text {
  font-size: 1.5rem;
  font-family: 'Monaco', 'Menlo', monospace;
  font-weight: 900;
  word-break: break-all;
  line-height: 1.4;
}

@media (min-width: 768px) {
  .password-text { font-size: 2rem; }
}

.password-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  justify-content: center;
}

.password-btn {
  flex: 1;
  max-width: 12rem;
  padding: 1rem;
  border-radius: var(--radius-2xl);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.password-btn.regenerate {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.password-btn.regenerate:hover {
  background: rgba(255, 255, 255, 0.2);
}

.password-btn.copy {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

.password-btn.copy:hover {
  background: var(--primary-hover);
}

.strength-bar {
  margin-top: 2rem;
}

.strength-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0.5rem;
}

.strength-track {
  height: 0.375rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.strength-fill {
  height: 100%;
  transition: all 0.5s ease;
}

.strength-fill.weak { width: 25%; background: #ef4444; }
.strength-fill.medium { width: 50%; background: #f59e0b; }
.strength-fill.strong { width: 75%; background: #10b981; }
.strength-fill.very-strong { width: 100%; background: #6366f1; }

/* QR Code */
.qr-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-2xl);
}

.qr-code-wrapper {
  padding: 1rem;
  background: white;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
}

#qr-code {
  display: block;
}

/* Stopwatch/Timer */
.timer-display {
  padding: 4rem 2rem;
  background: #18181b;
  border-radius: var(--radius-2xl);
  text-align: center;
  color: white;
  box-shadow: var(--shadow-xl);
}

.timer-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 1rem;
}

.timer-value {
  font-size: 4rem;
  font-family: 'Monaco', 'Menlo', monospace;
  font-weight: 900;
  letter-spacing: -0.05em;
}

@media (min-width: 768px) {
  .timer-value { font-size: 6rem; }
}

.timer-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  justify-content: center;
}

.timer-btn {
  flex: 1;
  max-width: 8rem;
  padding: 1rem;
  border-radius: var(--radius-2xl);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.timer-btn.start {
  background: var(--primary);
  color: white;
}

.timer-btn.stop {
  background: var(--error);
  color: white;
}

.timer-btn.reset {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

/* Laps */
.laps-section {
  margin-top: 2rem;
}

.laps-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.laps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.lap-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
}

.lap-number {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
}

.lap-time {
  font-family: 'Monaco', 'Menlo', monospace;
  font-weight: 700;
}

/* Prose Content */
.prose h2 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.prose h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.prose p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.prose ul, .prose ol {
  color: var(--text-secondary);
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.prose li {
  margin-bottom: 0.5rem;
}

.prose strong {
  color: var(--text-primary);
}

/* Utilities */
.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;
}

.hidden { display: none !important; }
.block { display: block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }

.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }

.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }

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

.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-black { font-weight: 900; }

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-primary { color: var(--text-primary); }
.text-success { color: var(--success); }
.text-error { color: var(--error); }
.text-indigo { color: var(--primary); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Print Styles */
@media print {
  .header, .footer, .sidebar, .back-to-top, .toast-container { display: none !important; }
  body { background: white; }
  .tool-box { box-shadow: none; border: 1px solid #ddd; }
}