:root {
  --bg-base:        #080c14;
  --bg-surface:     #0d1321;
  --bg-card:        #101828;
  --bg-card-hover:  #162032;
  --bg-elevated:    #1a2540;

  --border:         #1e2d3d;
  --border-bright:  #2a3f57;

  --text-primary:   #e2e8f0;
  --text-secondary: #8892a4;
  --text-muted:     #4a5568;

  --cyan:    #00d4ff;
  --green:   #00ff9f;
  --red:     #ff4757;
  --orange:  #ffa502;
  --purple:  #a78bfa;
  --yellow:  #ffd32a;

  --cyan-dim:   rgba(0, 212, 255, 0.12);
  --green-dim:  rgba(0, 255, 159, 0.10);
  --red-dim:    rgba(255, 71, 87, 0.12);
  --purple-dim: rgba(167, 139, 250, 0.10);

  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --font-sans: 'Inter', system-ui, sans-serif;

  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 12px;

  --transition: 200ms ease;
  --glow-cyan:  0 0 20px rgba(0, 212, 255, 0.25), 0 0 40px rgba(0, 212, 255, 0.10);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

.mono { font-family: var(--font-mono); }
.label-sm { font-size: 11px; letter-spacing: 1px; color: var(--text-muted); }

/* Background Layers */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.025) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  top: -30vh;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  height: 60vh;
  background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.04) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.scanline {
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0, 0, 0, 0.06) 3px,
    rgba(0, 0, 0, 0.06) 4px
  );
  pointer-events: none;
  z-index: 1;
  opacity: 0.4;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(8, 12, 20, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border), 0 4px 24px rgba(0, 0, 0, 0.4);
}

.header-left { display: flex; flex-direction: column; gap: 2px; }

.logo {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--text-primary);
  line-height: 1;
}

.logo-bracket { color: var(--text-muted); }
.logo-accent  { color: var(--cyan); text-shadow: var(--glow-cyan); }

.tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.header-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.status-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  letter-spacing: 1px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background var(--transition), box-shadow var(--transition);
}

.status-dot.online {
  background: var(--green);
  box-shadow: 0 0 8px var(--green), 0 0 16px rgba(0, 255, 159, 0.4);
  animation: pulse-green 2s ease-in-out infinite;
}

.status-dot.loading {
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: pulse-green 0.6s ease-in-out infinite;
}

.status-dot.error { background: var(--red); box-shadow: 0 0 8px var(--red); }

@keyframes pulse-green {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.6; }
}

#status-text { color: var(--text-secondary); font-size: 11px; }
.clock { font-size: 12px; color: var(--cyan); letter-spacing: 1px; }

/* Controls Bar */
.controls {
  position: relative;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 2rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  gap: 1rem;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  gap: 6px;
}

.filter-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
}

.filter-btn.active {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.15);
}

.filter-btn[data-filter="security"].active {
  border-color: var(--red);
  color: var(--red);
  background: var(--red-dim);
  box-shadow: 0 0 12px rgba(255, 71, 87, 0.15);
}

.filter-btn[data-filter="tech"].active {
  border-color: var(--purple);
  color: var(--purple);
  background: var(--purple-dim);
  box-shadow: 0 0 12px rgba(167, 139, 250, 0.15);
}

.btn-icon { font-size: 12px; }

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

.sort-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sort-select {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  padding: 5px 8px;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
}

.sort-select:focus,
.sort-select:hover {
  border-color: var(--border-bright);
  color: var(--text-primary);
}

.sort-select option { background: var(--bg-elevated); }

.refresh-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: transparent;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all var(--transition);
}

.refresh-btn:hover {
  border-color: var(--green);
  color: var(--green);
  background: var(--green-dim);
}

.refresh-btn.large {
  margin-top: 1rem;
  padding: 10px 24px;
  font-size: 13px;
}

.refresh-icon { font-size: 14px; display: inline-block; }
.refresh-icon.spinning { animation: spin 1s linear infinite; }

@keyframes spin { to { transform: rotate(360deg); } }

.cache-info {
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

/* Search */
.search-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 180px;
  max-width: 340px;
  position: relative;
}

.search-icon {
  font-size: 15px;
  color: var(--text-muted);
  flex-shrink: 0;
  pointer-events: none;
}

.search-input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  padding: 6px 10px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input::placeholder { color: var(--text-muted); }

.search-input:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.1);
}

.search-input::-webkit-search-cancel-button { display: none; }

.search-clear {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  line-height: 1;
  transition: color var(--transition);
  flex-shrink: 0;
}

.search-clear:hover { color: var(--red); }

/* Stats Bar */
.stats-bar {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0.5rem 2rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 20px 0 0;
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 20px 0 0;
}

.security-color { color: var(--red) !important; }
.tech-color     { color: var(--purple) !important; }

/* Main / Feed Grid */
#main {
  position: relative;
  z-index: 5;
  padding: 1.25rem 2rem;
  min-height: calc(100vh - 200px);
}

.feed-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 200px;
  gap: 1.25rem;
}

/* Article Card */
.card {
  height: 200px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--source-color, var(--cyan));
  box-shadow: 0 0 20px rgba(var(--source-color-rgb, 0, 212, 255), 0.15),
              0 8px 32px rgba(0, 0, 0, 0.3);
}

.card-accent {
  height: 2px;
  background: var(--source-color, var(--cyan));
  box-shadow: 0 0 8px var(--source-color, var(--cyan));
}

.card-body {
  padding: 1rem 1.1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
  gap: 8px;
  flex-wrap: wrap;
}

.source-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 2px 8px;
  border-radius: 3px;
  border: 1px solid currentColor;
  opacity: 0.85;
  white-space: nowrap;
}

.category-badge {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 1.5px;
  padding: 2px 6px;
  border-radius: 3px;
}

.category-badge.security {
  background: var(--red-dim);
  color: var(--red);
  border: 1px solid rgba(255, 71, 87, 0.3);
}

.category-badge.tech {
  background: var(--purple-dim);
  color: var(--purple);
  border: 1px solid rgba(167, 139, 250, 0.3);
}

.card-date {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  white-space: nowrap;
  margin-left: auto;
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  transition: color var(--transition);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card:hover .card-title {
  color: var(--source-color, var(--cyan));
}

.card-snippet {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: auto;
  padding-top: 0.75rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 9.5px;
  padding: 1px 7px;
  border-radius: 3px;
  background: var(--bg-elevated);
  color: var(--text-muted);
  border: 1px solid var(--border);
  letter-spacing: 0.5px;
}

/* Loading Bar */
.loading-bar {
  height: 2px;
  background: var(--border);
  overflow: hidden;
}

.loading-bar-inner {
  height: 100%;
  width: 40%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
  animation: loading-sweep 1.2s ease-in-out infinite;
}

@keyframes loading-sweep {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

/* Error Banner */
.error-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 2rem;
  background: rgba(255, 71, 87, 0.08);
  border-bottom: 1px solid rgba(255, 71, 87, 0.25);
  font-size: 12px;
}

.error-banner-icon { color: var(--red); font-size: 13px; }

.error-banner-text {
  color: var(--red);
  opacity: 0.85;
  flex: 1;
  letter-spacing: 0.5px;
}

.error-banner-retry {
  background: transparent;
  border: 1px solid rgba(255, 71, 87, 0.4);
  border-radius: var(--radius-sm);
  color: var(--red);
  font-size: 10px;
  letter-spacing: 1px;
  padding: 3px 10px;
  cursor: pointer;
  transition: background var(--transition);
}

.error-banner-retry:hover { background: var(--red-dim); }

/* Empty State */
.empty-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 40vh;
  gap: 12px;
}

.empty-icon {
  font-size: 2.5rem;
  color: var(--text-muted);
}

.empty-screen p {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 2px;
}

/* Cursor blink */
.blink { animation: blink 1s step-end infinite; }

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* Footer */
footer {
  position: relative;
  z-index: 10;
  padding: 1rem 2rem;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
  text-align: center;
}

.footer-text {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* Responsive */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 1rem;
  }

  .header-right {
    align-items: flex-start;
    flex-direction: row;
    gap: 16px;
  }

  .controls {
    padding: 0.75rem 1rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .control-actions { flex-wrap: wrap; }

  #main {
    padding: 1rem;
  }

  .feed-grid {
    grid-template-columns: 1fr;
  }

  .stats-bar { padding: 0.5rem 1rem; flex-wrap: wrap; }
}

@media (max-width: 1100px) {
  .feed-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan); }

/* Selection */
::selection { background: rgba(0, 212, 255, 0.25); color: var(--text-primary); }

/* Source-specific glow accents */
.card[data-category="security"] .card-accent { box-shadow: 0 0 6px var(--source-color); }
.card[data-category="tech"]     .card-accent { box-shadow: 0 0 6px var(--source-color); }

/* Card entrance animation */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  animation: fadeUp 0.35s ease forwards;
}