/**
 * sbom.guru - Main Design System & Core Stylesheet
 *
 * Palette:
 * Navy: #071426 | Secondary Navy: #0B1F36 | Brand Blue: #0878F9
 * Light BG: #F5F8FC | White Cards: #FFFFFF | Text: #111827
 * Secondary Text: #596579 | Borders: #DFE7F0
 * Critical: #D92D20 | High: #E87512 | Medium: #D99A00 | Low: #16865C
 */

:root {
  --color-navy: #071426;
  --color-navy-secondary: #0B1F36;
  --color-navy-tint: #132b4a;
  --color-brand-blue: #0878F9;
  --color-brand-blue-hover: #0660c7;
  --color-brand-blue-subtle: rgba(8, 120, 249, 0.08);
  --color-light-bg: #F5F8FC;
  --color-white: #FFFFFF;
  --color-text-primary: #111827;
  --color-text-secondary: #596579;
  --color-text-muted: #8392A7;
  --color-border: #DFE7F0;
  --color-border-dark: #1b3558;

  /* Severity Tokens */
  --color-critical: #D92D20;
  --color-critical-bg: #FEF3F2;
  --color-critical-border: #FECDCA;
  --color-high: #E87512;
  --color-high-bg: #FFFAEB;
  --color-high-border: #FEDF89;
  --color-medium: #D99A00;
  --color-medium-bg: #FFFAEB;
  --color-medium-border: #FEDF89;
  --color-low: #16865C;
  --color-low-bg: #ECFDF3;
  --color-low-border: #A6F4C5;
  --color-unrated: #596579;
  --color-unrated-bg: #F2F4F7;
  --color-unrated-border: #EAECF0;

  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Spacing & Layout */
  --max-width: 1240px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px 0 rgba(16, 24, 40, 0.05);
  --shadow-md: 0 4px 8px -2px rgba(16, 24, 40, 0.06), 0 2px 4px -2px rgba(16, 24, 40, 0.04);
  --shadow-lg: 0 12px 16px -4px rgba(16, 24, 40, 0.08), 0 4px 6px -2px rgba(16, 24, 40, 0.03);
  --transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Resets & Base */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  background-color: var(--color-light-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--color-brand-blue);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--color-brand-blue-hover);
  text-decoration: underline;
}

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--color-brand-blue);
  outline-offset: 2px;
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--color-brand-blue);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  z-index: 99999;
  font-weight: 600;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

/* Containers */
.sbom-container {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
  width: 100%;
}

/* Site Header */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo-img {
  height: 38px;
  width: auto;
}

.brand-tagline-text {
  display: none;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  border-left: 1px solid var(--color-border);
  padding-left: 12px;
}

@media (min-width: 900px) {
  .brand-tagline-text {
    display: inline-block;
  }
}

/* Navigation */
.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-menu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 20px;
  align-items: center;
}

@media (min-width: 840px) {
  .nav-menu {
    display: flex;
  }
}

.nav-menu a {
  color: var(--color-text-primary);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.nav-menu a:hover, .nav-menu .current-menu-item > a {
  color: var(--color-brand-blue);
  background: var(--color-brand-blue-subtle);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-toggle-btn, .mobile-menu-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px;
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.search-toggle-btn:hover, .mobile-menu-toggle:hover {
  color: var(--color-navy);
  border-color: var(--color-text-secondary);
  background: var(--color-light-bg);
}

@media (min-width: 840px) {
  .mobile-menu-toggle {
    display: none;
  }
}

/* Search Modal Overlay */
.search-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(7, 20, 38, 0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  align-items: flex-start;
  justify-content: center;
  padding-top: 100px;
}

.search-modal.active {
  display: flex;
}

.search-modal-box {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  width: 90%;
  max-width: 600px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.search-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.search-modal-header h3 {
  margin: 0;
  font-size: 1.125rem;
  color: var(--color-navy);
}

.search-modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  padding: 4px;
}

.search-form-inner {
  display: flex;
  gap: 8px;
}

.search-form-inner input[type="search"] {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 1rem;
}

.search-form-inner button[type="submit"] {
  background: var(--color-brand-blue);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.search-form-inner button[type="submit"]:hover {
  background: var(--color-brand-blue-hover);
}

/* Mobile Nav Drawer */
.mobile-nav-drawer {
  display: none;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 20px;
}

.mobile-nav-drawer.active {
  display: block;
}

.mobile-nav-drawer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav-drawer li {
  margin-bottom: 8px;
}

.mobile-nav-drawer a {
  display: block;
  padding: 8px 12px;
  color: var(--color-text-primary);
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.mobile-nav-drawer a:hover {
  background: var(--color-light-bg);
  color: var(--color-brand-blue);
  text-decoration: none;
}

/* Main Site Content */
.site-content {
  flex: 1;
  padding-bottom: 60px;
}

/* Dark Homepage Hero */
.hero-cybersecurity {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-secondary) 100%);
  color: #fff;
  padding: 56px 0 64px 0;
  border-bottom: 1px solid var(--color-border-dark);
  position: relative;
  overflow: hidden;
}

.hero-cybersecurity::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 500px;
  height: 100%;
  background: radial-gradient(circle at 80% 20%, rgba(8, 120, 249, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  position: relative;
  z-index: 1;
}

@media (min-width: 960px) {
  .hero-inner {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(8, 120, 249, 0.15);
  border: 1px solid rgba(8, 120, 249, 0.35);
  color: #8ec3ff;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.hero-badge .pulse-dot {
  width: 7px;
  height: 7px;
  background: #16865C;
  border-radius: 50%;
  box-shadow: 0 0 6px #16865C;
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 16px 0;
  color: #FFFFFF;
  letter-spacing: -0.8px;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.6;
  color: #A0B3CC;
  margin: 0 0 28px 0;
  max-width: 600px;
}

.hero-quick-search {
  max-width: 540px;
  margin-bottom: 24px;
}

.hero-search-form {
  display: flex;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-md);
  padding: 4px;
  transition: var(--transition);
}

.hero-search-form:focus-within {
  border-color: var(--color-brand-blue);
  background: rgba(255, 255, 255, 0.12);
}

.hero-search-form input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 10px 16px;
  color: #fff;
  font-size: 0.9375rem;
  font-family: var(--font-sans);
}

.hero-search-form input::placeholder {
  color: #798FA8;
}

.hero-search-form button {
  background: var(--color-brand-blue);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 18px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.hero-search-form button:hover {
  background: var(--color-brand-blue-hover);
}

.hero-stats-panel {
  background: rgba(11, 31, 54, 0.7);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(8px);
}

.hero-stats-title {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: #8EC3FF;
  margin: 0 0 16px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.stat-item {
  background: rgba(7, 20, 38, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 14px;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: #fff;
  margin-bottom: 2px;
}

.stat-label {
  font-size: 0.75rem;
  color: #8392A7;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

/* Sections */
.home-section {
  padding: 48px 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 28px;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 12px;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-navy);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-more-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-brand-blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Grid Layouts */
.articles-grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .articles-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.articles-grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

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

/* Cards */
.article-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #b0c7de;
}

.card-meta-header {
  padding: 16px 20px 0 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.card-body {
  padding: 16px 20px 20px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-title {
  font-size: 1.1875rem;
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 10px 0;
  color: var(--color-navy);
}

.card-title a {
  color: var(--color-navy);
  text-decoration: none;
}

.card-title a:hover {
  color: var(--color-brand-blue);
}

.card-excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
  margin: 0 0 16px 0;
  flex: 1;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.card-footer .date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* Badges */
.badge-severity {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  border: 1px solid transparent;
}

.severity-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.severity-critical {
  background-color: var(--color-critical-bg);
  color: var(--color-critical);
  border-color: var(--color-critical-border);
}

.severity-critical .severity-dot {
  background-color: var(--color-critical);
}

.severity-high {
  background-color: var(--color-high-bg);
  color: var(--color-high);
  border-color: var(--color-high-border);
}

.severity-high .severity-dot {
  background-color: var(--color-high);
}

.severity-medium {
  background-color: var(--color-medium-bg);
  color: var(--color-medium);
  border-color: var(--color-medium-border);
}

.severity-medium .severity-dot {
  background-color: var(--color-medium);
}

.severity-low {
  background-color: var(--color-low-bg);
  color: var(--color-low);
  border-color: var(--color-low-border);
}

.severity-low .severity-dot {
  background-color: var(--color-low);
}

.severity-unrated {
  background-color: var(--color-unrated-bg);
  color: var(--color-unrated);
  border-color: var(--color-unrated-border);
}

.severity-unrated .severity-dot {
  background-color: var(--color-unrated);
}

.cvss-number {
  font-family: var(--font-mono);
  font-weight: 700;
  margin-left: 2px;
}

.badge-advisory-id {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #E8F2FD;
  color: var(--color-brand-blue);
  border: 1px solid #C8E1FD;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 600;
}

.badge-ecosystem {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--color-light-bg);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-type {
  display: inline-block;
  background: #EEF4FB;
  color: #1D5490;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

/* Breadcrumbs */
.sbom-breadcrumbs {
  padding: 16px 0;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 8px;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  color: var(--color-text-muted);
  margin-right: 8px;
}

.breadcrumb-item a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.breadcrumb-item a:hover {
  color: var(--color-brand-blue);
}

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

/* Newsletter Box */
.newsletter-card {
  background: var(--color-navy);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 36px;
  margin: 40px 0;
  border: 1px solid var(--color-border-dark);
  position: relative;
  overflow: hidden;
}

.newsletter-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 100%;
  background: radial-gradient(circle at 80% 50%, rgba(8, 120, 249, 0.2) 0%, transparent 60%);
  pointer-events: none;
}

.newsletter-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  position: relative;
  z-index: 1;
}

@media (min-width: 800px) {
  .newsletter-inner {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }
}

.newsletter-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 8px 0;
  color: #fff;
}

.newsletter-desc {
  font-size: 0.9375rem;
  color: #9DB4CE;
  margin: 0;
}

.newsletter-form {
  display: flex;
  gap: 8px;
}

.newsletter-form input[type="email"] {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
}

.newsletter-form input[type="email"]::placeholder {
  color: #7A93B0;
}

.newsletter-form button {
  background: var(--color-brand-blue);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.newsletter-form button:hover {
  background: var(--color-brand-blue-hover);
}

/* Pagination */
.pagination-nav {
  margin-top: 48px;
  display: flex;
  justify-content: center;
}

.pagination-nav .page-numbers {
  display: flex;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.pagination-nav a, .pagination-nav span.current {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-text-primary);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
}

.pagination-nav span.current {
  background: var(--color-brand-blue);
  color: #fff;
  border-color: var(--color-brand-blue);
}

.pagination-nav a:hover {
  background: var(--color-light-bg);
  border-color: var(--color-brand-blue);
}

/* Empty State */
.empty-state-panel {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 60px 24px;
  text-align: center;
  max-width: 600px;
  margin: 40px auto;
}

.empty-state-icon {
  margin-bottom: 16px;
  color: var(--color-text-muted);
}

.empty-state-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-navy);
  margin: 0 0 8px 0;
}

.empty-state-desc {
  color: var(--color-text-secondary);
  margin: 0 0 20px 0;
}

/* Site Footer */
.site-footer {
  background: var(--color-navy);
  color: #9DB4CE;
  border-top: 1px solid var(--color-border-dark);
  margin-top: auto;
  padding-top: 48px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-bottom: 40px;
}

@media (min-width: 768px) {
  .footer-top {
    grid-template-columns: 1.5fr repeat(3, 1fr);
  }
}

.footer-col h4 {
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin: 0 0 16px 0;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: #9DB4CE;
  font-size: 0.875rem;
  text-decoration: none;
}

.footer-col a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  font-size: 0.8125rem;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}