/* ===================================
   LESHEY TECHNOLOGIES - DESIGN SYSTEM
   Clean White Theme
   =================================== */

:root {
  /* Colors - White Theme Only */
  --color-primary: #0078D4;
  --color-primary-hover: #106EBE;
  --color-accent: #8250DF;
  --color-success: #2DA44E;
  --color-danger: #CF222E;
  
  --color-bg: #FFFFFF;
  --color-surface: #F6F8FA;
  --color-surface-secondary: #EAEEF2;
  --color-border: #D0D7DE;
  --color-border-subtle: #E8ECF0;
  
  --color-text: #24292F;
  --color-text-secondary: #57606A;
  --color-text-tertiary: #6E7781;
  --color-text-inverse: #FFFFFF;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
  --font-family-mono: 'Cascadia Code', 'SF Mono', 'Monaco', 'Courier New', monospace;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================================
   RESET & BASE
   =================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   HEADER & NAVIGATION
   =================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  font-size: 18px;
}

.logo img {
  height: 32px;
}

.main-nav {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.main-nav a {
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.main-nav a:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

.main-nav a.active {
  color: var(--color-text);
  background: var(--color-surface);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
  padding: var(--space-3xl) var(--space-xl);
  text-align: center;
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 20px;
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--space-xl);
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-family: inherit;
}

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

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

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

.btn-ghost:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

/* ===================================
   CONTAINER
   =================================== */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-xl);
}

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-xl);
}

/* ===================================
   SECTION
   =================================== */

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.section-description {
  font-size: 18px;
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* ===================================
   CARDS & GRID
   =================================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: var(--transition);
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: var(--space-md);
}

.card-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.card-description {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.card-tags {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.tag {
  padding: 4px 12px;
  background: var(--color-surface-secondary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ===================================
   TOOL CARDS (Special styling)
   =================================== */

.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.tool-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 8px 24px rgba(0, 120, 212, 0.12);
  transform: translateY(-4px);
}

.tool-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.tool-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  flex-shrink: 0;
}

.tool-meta {
  flex: 1;
}

.tool-category {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-tertiary);
  font-weight: 600;
  margin-bottom: 4px;
}

.tool-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
}

.tool-description {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  flex: 1;
}

.tool-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-subtle);
}

.tool-tags {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.tool-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.tool-cta:hover {
  background: var(--color-primary-hover);
  transform: translateX(2px);
}

/* ===================================
   STATS SECTION
   =================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-2xl) 0;
}

.stat {
  text-align: center;
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.stat-value {
  font-size: 40px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.stat-label {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

/* ===================================
   FOOTER
   =================================== */

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  margin-top: var(--space-3xl);
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer-left {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.footer-logo {
  font-weight: 600;
  font-size: 16px;
  color: var(--color-text);
}

.footer-copyright {
  font-size: 14px;
  color: var(--color-text-tertiary);
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-links a {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

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

/* ===================================
   SEARCH & FILTER
   =================================== */

.search-bar {
  position: relative;
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

.search-input {
  width: 100%;
  padding: 14px 48px 14px 48px;
  font-size: 16px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: inherit;
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.1);
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  font-size: 20px;
}

.filter-tabs {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  justify-content: center;
}

.filter-tab {
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.filter-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
}

.filter-tab.active {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

/* ===================================
   TOOL INTERFACE
   =================================== */

.tool-interface {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin: var(--space-lg) 0;
}

.tool-interface h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.input-group {
  margin-bottom: var(--space-lg);
}

.input-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.input-group input,
.input-group textarea,
.input-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: inherit;
  transition: var(--transition);
}

.input-group input:focus,
.input-group textarea:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.1);
}

.input-group textarea {
  min-height: 120px;
  resize: vertical;
  font-family: var(--font-family-mono);
}

.output-box {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-family: var(--font-family-mono);
  font-size: 14px;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ===================================
   CODE BLOCKS
   =================================== */

pre {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  overflow-x: auto;
  font-family: var(--font-family-mono);
  font-size: 14px;
  line-height: 1.6;
}

code {
  font-family: var(--font-family-mono);
  font-size: 14px;
  background: var(--color-surface);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

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

@media (max-width: 768px) {
  .hero h1 {
    font-size: 32px;
  }
  
  .hero p {
    font-size: 16px;
  }
  
  .main-nav {
    display: none;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

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

.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.mt-0 { margin-top: 0; }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }