:root {
  --bg-dark: #0b0f19;
  --bg-card: rgba(18, 25, 41, 0.75);
  --bg-card-hover: rgba(26, 36, 61, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.65);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(56, 189, 248, 0.3);
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --accent-cyan: #38bdf8;
  --accent-violet: #a855f7;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  --gradient-primary: linear-gradient(135deg, #38bdf8 0%, #a855f7 100%);
  --gradient-card: linear-gradient(180deg, rgba(30, 41, 59, 0.5) 0%, rgba(15, 23, 42, 0.7) 100%);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.15);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

.code-font {
  font-family: 'Fira Code', monospace;
}

/* Background Glow Effects */
.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  z-index: -1;
  opacity: 0.35;
  pointer-events: none;
}
.bg-glow-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #38bdf8, transparent 70%);
  top: -100px;
  left: -100px;
}
.bg-glow-2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #a855f7, transparent 70%);
  bottom: -150px;
  right: -150px;
}

/* Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 2rem;
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  cursor: pointer;
  user-select: none;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: white;
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
}

.brand-text h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Header Search */
.header-search {
  flex: 1;
  max-width: 540px;
  position: relative;
}

.header-search input {
  width: 100%;
  padding: 0.65rem 1rem 0.65rem 2.6rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-main);
  font-size: 0.9rem;
  transition: var(--transition);
}

.header-search input:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
  background: rgba(15, 23, 42, 0.9);
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
}

.search-badge {
  position: absolute;
  right: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-badge {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: 20px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  color: var(--accent-cyan);
}

/* Buttons */
.btn {
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.25);
}
.btn-primary:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--border-color);
  color: var(--text-main);
}
.btn-secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
}
.btn-ghost:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

/* Main Container */
.main-container {
  max-width: 1400px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* Hero Stats Section */
.hero-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-glow);

  @media (max-width: 900px) {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }
}

.hero-info h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.hero-info p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.text-accent {
  color: var(--accent-cyan);
}

.stats-pills {
  display: flex;
  gap: 1.5rem;
}

.stat-item {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-md);
  text-align: center;
  min-width: 130px;
}

.stat-value {
  display: block;
  font-family: 'Outfit', sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

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

/* Sectors Section */
.section-title {
  margin-bottom: 1.25rem;
}
.section-title h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.section-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.category-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.category-card.active {
  border-color: var(--accent-violet);
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.3);
}

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

.cat-icon {
  font-size: 1.6rem;
}

.cat-count {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.cat-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.cat-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Filter Card */
.filter-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  backdrop-filter: blur(12px);
}

.filter-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.filter-input-group {
  flex: 2;
  min-width: 280px;
  position: relative;
}

.filter-input-group i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
}

.filter-input-group input {
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-main);
  font-size: 0.95rem;
}
.filter-input-group input:focus {
  outline: none;
  border-color: var(--accent-cyan);
}

.filter-select-group {
  flex: 1;
  min-width: 220px;
}

.filter-select-group select {
  width: 100%;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-main);
  font-size: 0.9rem;
  cursor: pointer;
}

/* Tag Cloud & Formats */
.tags-row, .format-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.tags-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 100px;
}

.tags-cloud, .format-pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag-btn, .pill {
  padding: 0.3rem 0.75rem;
  border-radius: 14px;
  font-size: 0.75rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.tag-btn:hover, .pill:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.tag-btn.active, .pill.active {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  font-weight: 700;
}

/* Results Area */
.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 1.5rem 0 1rem 0;
}

.results-count {
  font-size: 1rem;
  color: var(--text-muted);
}
.results-count span {
  font-weight: 800;
  color: var(--accent-cyan);
}

.current-filter-badge {
  font-size: 0.8rem;
  padding: 0.3rem 0.85rem;
  border-radius: 12px;
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.3);
  color: var(--accent-violet);
}

/* Articles Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.article-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.category-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.article-ext-badge {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-family: 'Fira Code', monospace;
}

.article-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  cursor: pointer;
}
.article-title:hover {
  color: var(--accent-cyan);
}

.article-summary {
  font-size: 0.83rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-path {
  font-size: 0.75rem;
  color: var(--text-dim);
  background: rgba(0, 0, 0, 0.3);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  word-break: break-all;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 0.85rem;
  margin-top: 0.5rem;
}

.article-date {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* Pagination */
.pagination-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2rem;
}

.page-btn {
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
}
.page-btn.active {
  background: var(--accent-cyan);
  color: #000;
  font-weight: 800;
  border-color: var(--accent-cyan);
}
.page-btn:hover:not(.active) {
  border-color: var(--accent-cyan);
  color: var(--text-main);
}

/* Modal */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(12px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.modal-backdrop.open {
  display: flex;
}

.modal-content {
  background: #0f172a;
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 1100px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
  overflow: hidden;
}

.modal-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  background: rgba(30, 41, 59, 0.4);
}

.modal-title-group h2 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-top: 0.4rem;
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
}
.modal-close-btn:hover {
  color: var(--accent-rose);
}

.modal-body {
  padding: 2rem;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 2rem;
  overflow-y: auto;

  @media (max-width: 850px) {
    grid-template-columns: 1fr;
  }
}

.modal-meta-card {
  background: rgba(18, 25, 41, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;

  height: fit-content;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.meta-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.meta-value {
  font-size: 0.85rem;
  color: var(--text-main);
  word-break: break-all;
}

.modal-article-view {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.content-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.content-markdown {
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: #cbd5e1;
  max-height: 550px;
  overflow-y: auto;
  white-space: pre-wrap;
  font-family: 'Fira Code', monospace;
}

/* Footer */
.app-footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--border-color);
  margin-top: 4rem;
}