/* ==========================================================================
   ToolNova Design System & Global Styles
   ========================================================================== */

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-ring: rgba(37, 99, 235, 0.25);
  --accent: #7c3aed;
  --accent-hover: #6d28d9;
  --accent-light: #f5f3ff;
  --bg-page: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f1f5f9;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;
  --border: #e2e8f0;
  --border-dark: #cbd5e1;
  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.06);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.container-narrow {
  max-width: 860px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 1.5rem;
}

.brand-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.brand-link img {
  height: 38px;
  width: auto;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav-link {
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background-color: var(--primary-light);
}

.nav-dropdown {
  position: relative;
}
.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 220px;
  padding: 0.5rem;
  display: none;
  list-style: none;
  z-index: 60;
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  display: block;
}
.nav-dropdown-item a {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--text-main);
  border-radius: var(--radius-sm);
}
.nav-dropdown-item a:hover {
  background: var(--surface-hover);
  color: var(--primary);
}

.header-search-trigger {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  min-width: 200px;
}
.header-search-trigger:hover {
  border-color: var(--primary);
  color: var(--text-main);
  box-shadow: 0 0 0 3px var(--primary-ring);
}
.header-search-trigger kbd {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.15rem 0.4rem;
  background: var(--bg-page);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  margin-left: auto;
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-main);
}

/* ==========================================================================
   Buttons & Badges
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}
.btn-primary:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(37, 99, 235, 0.25);
}

.btn-secondary {
  background-color: var(--surface);
  color: var(--text-main);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
  background-color: var(--surface-hover);
  border-color: var(--border-dark);
  color: var(--primary);
}

.btn-accent {
  background-color: var(--accent);
  color: #ffffff;
}
.btn-accent:hover {
  background-color: var(--accent-hover);
  color: #ffffff;
}

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

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.85rem 1.75rem;
  font-size: 1.0625rem;
  border-radius: var(--radius-md);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-blue {
  background-color: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.2);
}
.badge-purple {
  background-color: var(--accent-light);
  color: var(--accent);
  border: 1px solid rgba(124, 58, 237, 0.2);
}
.badge-green {
  background-color: var(--success-light);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}
.badge-tax {
  background-color: #f0fdf4;
  color: #15803d;
  border: 1px solid #bbf7d0;
  font-weight: 700;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  padding: 4.5rem 0 3.5rem;
  text-align: center;
  background: radial-gradient(circle at 50% -20%, rgba(37, 99, 235, 0.08) 0%, rgba(248, 250, 252, 0) 70%);
  border-bottom: 1px solid var(--border);
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
  max-width: 820px;
  margin: 0 auto 1.25rem;
}

.hero-subtitle {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 2rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-search-box {
  max-width: 580px;
  margin: 0 auto;
  position: relative;
}
.hero-search-input {
  width: 100%;
  padding: 1rem 1.25rem 1rem 3.25rem;
  font-size: 1.0625rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  outline: none;
  transition: var(--transition);
}
.hero-search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-ring), var(--shadow-lg);
}
.hero-search-icon {
  position: absolute;
  left: 1.15rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* ==========================================================================
   Category Filter & Cards
   ========================================================================== */

.category-nav {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 1rem 0;
  scrollbar-width: none;
}
.category-nav::-webkit-scrollbar {
  display: none;
}

.category-pill {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  white-space: nowrap;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
}
.category-pill:hover, .category-pill.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.section-title {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
}
.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  margin-top: 0.25rem;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  text-decoration: none;
  color: inherit;
}
.tool-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.tool-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  background-color: var(--primary-light);
  color: var(--primary);
}
.tool-card-icon.purple {
  background-color: var(--accent-light);
  color: var(--accent);
}
.tool-card-icon.green {
  background-color: var(--success-light);
  color: var(--success);
}

.tool-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}
.tool-card-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--primary);
  font-weight: 600;
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}
.tool-card:hover .tool-card-footer {
  color: var(--primary-hover);
}

/* ==========================================================================
   Trust & Privacy Banners
   ========================================================================== */

.trust-banner {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  margin: 3.5rem 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  box-shadow: var(--shadow-lg);
}
.trust-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.trust-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #60a5fa;
}
.trust-title {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
  color: #ffffff;
}
.trust-desc {
  font-size: 0.875rem;
  color: #94a3b8;
  line-height: 1.5;
}

.privacy-notice-box {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-md);
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: #166534;
  margin-bottom: 1.5rem;
}
.privacy-notice-box svg {
  flex-shrink: 0;
  color: #15803d;
}

/* ==========================================================================
   Tax Disclaimer & Educational Callouts
   ========================================================================== */

.tax-disclaimer-callout {
  background: #fffbeb;
  border-left: 4px solid #f59e0b;
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
  font-size: 0.875rem;
  color: #92400e;
  line-height: 1.6;
}
.tax-disclaimer-callout strong {
  color: #78350f;
}

.tax-year-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: #dcfce7;
  color: #15803d;
  border: 1px solid #86efac;
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   Breadcrumb Navigation
   ========================================================================== */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--text-muted);
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb-separator {
  color: var(--text-subtle);
}

/* ==========================================================================
   FAQ Accordions
   ========================================================================== */

.faq-section {
  margin: 3.5rem 0;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item[open] {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  padding: 1.125rem 1.25rem;
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.faq-question::-webkit-details-marker {
  display: none;
}
.faq-question::after {
  content: "+";
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: transform 0.2s;
}
.faq-item[open] .faq-question::after {
  content: "−";
  color: var(--primary);
}
.faq-answer {
  padding: 0 1.25rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
  border-top: 1px solid transparent;
}
.faq-item[open] .faq-answer {
  border-top-color: var(--border);
  padding-top: 0.85rem;
}

/* ==========================================================================
   Monetization & AdSense Ready Containers
   ========================================================================== */

.ad-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--surface-hover);
  border: 1px dashed var(--border-dark);
  border-radius: var(--radius-md);
  margin: 2.5rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.ad-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-subtle);
  margin-bottom: 0.35rem;
}
.ad-placeholder {
  color: var(--text-subtle);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
}
.ad-banner-desktop {
  min-height: 90px;
  width: 100%;
  max-width: 728px;
  padding: 0.75rem;
  margin-left: auto;
  margin-right: auto;
}
.ad-sidebar {
  min-height: 250px;
  width: 100%;
  max-width: 300px;
  padding: 1rem;
}

.affiliate-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 2.5rem 0;
  box-shadow: var(--shadow-sm);
}
.affiliate-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.affiliate-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
}
.affiliate-disclosure {
  font-size: 0.75rem;
  color: var(--text-subtle);
  line-height: 1.4;
  margin-top: 0.75rem;
}

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

.site-footer {
  margin-top: auto;
  background-color: #0f172a;
  color: #cbd5e1;
  border-top: 1px solid #1e293b;
  padding: 4rem 0 2rem;
  font-size: 0.9375rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3.5rem;
}
.footer-brand p {
  color: #94a3b8;
  margin: 1rem 0 1.5rem;
  line-height: 1.6;
  max-width: 320px;
}
.footer-heading {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.footer-links a {
  color: #94a3b8;
  transition: var(--transition);
}
.footer-links a:hover {
  color: #ffffff;
  padding-left: 2px;
}
.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: #64748b;
}

/* ==========================================================================
   Search Modal
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 5rem 1.25rem 2rem;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.modal-backdrop.open {
  display: flex;
  opacity: 1;
}

.search-modal-container {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 640px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 80vh;
}
.search-modal-header {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  gap: 0.75rem;
}
.search-modal-input {
  width: 100%;
  border: none;
  outline: none;
  font-size: 1.125rem;
  color: var(--text-main);
  background: transparent;
}
.search-modal-results {
  overflow-y: auto;
  padding: 0.75rem;
  max-height: 480px;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.search-result-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition);
}
.search-result-item:hover, .search-result-item.selected {
  background: var(--surface-hover);
  color: var(--primary);
}
.search-result-info {
  flex-grow: 1;
}
.search-result-title {
  font-weight: 600;
  font-size: 0.9375rem;
}
.search-result-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.search-result-badge {
  font-size: 0.6875rem;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
  background: var(--bg-page);
  color: var(--text-muted);
}
.search-modal-footer {
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--border);
  background: var(--bg-page);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

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

@media (max-width: 1024px) {
  .nav-desktop {
    display: none;
  }
  .mobile-nav-toggle {
    display: block;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 2.125rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .tools-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .header-search-trigger {
    min-width: unset;
    padding: 0.45rem 0.5rem;
  }
  .header-search-trigger span,
  .header-search-trigger kbd {
    display: none;
  }
}