/* ==========================================================================
   ToolSuite - Clean, Modern & Minimal Design System
   Vanilla CSS - Simple, fast, sober, without unnecessary gradients or glow
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Dark Theme (Default) - Clean Slate/Neutral */
  --bg-main: #0f1115;
  --bg-sidebar: #14171d;
  --bg-card: #181b22;
  --bg-card-hover: #1e222b;
  --bg-input: #1a1d25;
  --bg-glass: rgba(20, 23, 29, 0.95);
  --border-color: #262a34;
  --border-color-hover: #3b4252;
  --border-subtle: #1e222b;
  
  /* Text */
  --text-primary: #f1f3f5;
  --text-secondary: #9aa2b1;
  --text-muted: #6c7585;
  --text-inverse: #0f1115;
  
  /* Accents - Solid & Discreet */
  --accent-primary: #3b82f6;
  --accent-primary-hover: #2563eb;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #ef4444;

  /* UI Tokens */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
  
  --sidebar-width: 250px;
  --header-height: 60px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
  
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

/* Light Theme - Clean, Minimal White */
[data-theme="light"] {
  --bg-main: #f8fafc;
  --bg-sidebar: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-input: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.95);
  --border-color: #e2e8f0;
  --border-color-hover: #cbd5e1;
  --border-subtle: #f1f5f9;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
}

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

html, body {
  height: 100%;
  font-family: var(--font-main);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 40;
  transition: transform var(--transition-normal);
}

.sidebar-header {
  height: var(--header-height);
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
}

.brand-text h1 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.brand-text span {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.nav-section-title {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 0 0.5rem 0.35rem;
}

.nav-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
}

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

.nav-link.active {
  color: var(--text-primary);
  background: var(--border-color);
  font-weight: 600;
}

.nav-link .icon {
  font-size: 1rem;
  width: 20px;
  text-align: center;
}

.nav-badge {
  margin-left: auto;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-xs);
  background: var(--border-color);
  color: var(--text-muted);
}

.nav-link.active .nav-badge {
  background: var(--border-color-hover);
  color: var(--text-primary);
}

.sidebar-footer {
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--border-color);
}

.privacy-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.privacy-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-emerald);
}

/* Main Wrapper */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* Header */
.top-header {
  height: var(--header-height);
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-glass);
  position: sticky;
  top: 0;
  z-index: 30;
}

.search-trigger {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.82rem;
  cursor: pointer;
  transition: border-color var(--transition-fast);
  min-width: 260px;
}

.search-trigger:hover {
  border-color: var(--border-color-hover);
  color: var(--text-secondary);
}

.search-shortcut {
  margin-left: auto;
  font-size: 0.68rem;
  font-weight: 500;
  padding: 0.1rem 0.35rem;
  background: var(--border-color);
  border-radius: var(--radius-xs);
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.theme-toggle-btn, .action-icon-btn {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.95rem;
}

.theme-toggle-btn:hover, .action-icon-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-color-hover);
}

/* Content Area */
.content-container {
  flex: 1;
  padding: 1.75rem;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
}

/* Simple Hero Header */
.hero-banner {
  padding: 1.5rem 0 2rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.hero-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-xs);
  background: var(--border-color);
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.hero-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.hero-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin-bottom: 1.25rem;
}

.hero-stats {
  display: flex;
  gap: 2rem;
}

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

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

.hero-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Category Filter Bar */
.category-filter-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.filter-btn {
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

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

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

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tool-card:hover {
  border-color: var(--border-color-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.tool-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.tool-icon-wrapper {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  background: var(--border-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

/* Neutral subtle icons instead of gaudy gradients */
.icon-doc, .icon-image, .icon-dev, .icon-util {
  background: var(--border-subtle);
}

.tool-category-badge {
  font-size: 0.68rem;
  font-weight: 500;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-xs);
  background: var(--border-color);
  color: var(--text-muted);
}

.tool-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.tool-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin-bottom: 1rem;
  flex: 1;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
}

.tool-tag {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.tool-open-btn {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
}

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

/* Tool View */
.tool-view-wrapper {
  display: none;
}

.tool-view-wrapper.active {
  display: block;
}

.tool-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  gap: 1rem;
}

.tool-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
}

.back-to-dash-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.back-to-dash-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-color-hover);
}

.breadcrumb-sep {
  color: var(--text-muted);
}

.breadcrumb-current {
  color: var(--text-primary);
  font-weight: 500;
}

.tool-view-title-group h2 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-top: 0.2rem;
}

.tool-view-title-group p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-wrapper {
    margin-left: 0;
  }
  .mobile-menu-btn {
    display: flex !important;
  }
}

.mobile-menu-btn {
  display: none;
}