/* ─────────────────────────────────────────
   RESET & BASE
───────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-page:       #11172b;
  --bg-card:       #1a1d27;
  --bg-card-hover: #1f2233;
  --bg-filter:     #13151e;
  --border:        rgba(255,255,255,0.08);
  --border-hover:  rgba(255,255,255,0.16);
  --text-primary:  #e8eaf0;
  --text-secondary:#8b8fa8;
  --text-muted:    #5a5e74;
  --accent:        #4f8ef7;

  --critical:      #ff4d4d;
  --critical-bg:   rgba(255,77,77,0.12);
  --critical-border: rgba(255,77,77,0.3);

  --high:          #f59e0b;
  --high-bg:       rgba(245,158,11,0.12);
  --high-border:   rgba(245,158,11,0.3);

  --medium:        #4f8ef7;
  --medium-bg:     rgba(79,142,247,0.12);
  --medium-border: rgba(79,142,247,0.3);

  --low:           #22c55e;
  --low-bg:        rgba(34,197,94,0.12);
  --low-border:    rgba(34,197,94,0.3);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-page);
  color: var(--text-primary);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.6;
}

/* ─────────────────────────────────────────
   HEADER
───────────────────────────────────────── */
.header {
  background: var(--bg-filter);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.01em;
}

.header-icon {
  color: var(--critical);
  font-size: 10px;
}

.header-meta {
  font-size: 12px;
  color: var(--text-muted);
}

/* ─────────────────────────────────────────
   STATS BAR
───────────────────────────────────────── */
.stats-bar {
  background: var(--bg-filter);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}

.stats-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 18px;
  min-width: 90px;
  text-align: center;
}

.stat-card.critical { border-color: var(--critical-border); background: var(--critical-bg); }
.stat-card.high     { border-color: var(--high-border);     background: var(--high-bg); }
.stat-card.medium   { border-color: var(--medium-border);   background: var(--medium-bg); }
.stat-card.low      { border-color: var(--low-border);      background: var(--low-bg); }

.stat-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

.stat-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-card.critical .stat-value { color: var(--critical); }
.stat-card.high     .stat-value { color: var(--high); }
.stat-card.medium   .stat-value { color: var(--medium); }
.stat-card.low      .stat-value { color: var(--low); }

/* ─────────────────────────────────────────
   FILTER BAR
───────────────────────────────────────── */
.filter-bar {
  background: var(--bg-filter);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
  position: sticky;
  top: 49px;
  z-index: 90;
}

.filter-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

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

.filter-btn {
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

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

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.filter-btn.critical.active { background: var(--critical); border-color: var(--critical); }
.filter-btn.high.active     { background: var(--high);     border-color: var(--high); color: #000; }
.filter-btn.medium.active   { background: var(--medium);   border-color: var(--medium); }
.filter-btn.low.active      { background: var(--low);      border-color: var(--low); color: #000; }

.search-wrap { flex: 1; max-width: 320px; }

.search-input {
  width: 100%;
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
}

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

/* ─────────────────────────────────────────
   FEED GRID
───────────────────────────────────────── */
.feed-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

.feed-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

/* ─────────────────────────────────────────
   ARTICLE CARD
───────────────────────────────────────── */
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.15s, background 0.15s;
  cursor: default;
}

.article-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.article-card.sev-Critical { border-left: 3px solid var(--critical); }
.article-card.sev-High     { border-left: 3px solid var(--high); }
.article-card.sev-Medium   { border-left: 3px solid var(--medium); }
.article-card.sev-Low      { border-left: 3px solid var(--low); }

/* Card top row */
.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.card-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-critical { background: var(--critical-bg); color: var(--critical); border: 1px solid var(--critical-border); }
.badge-high     { background: var(--high-bg);     color: var(--high);     border: 1px solid var(--high-border); }
.badge-medium   { background: var(--medium-bg);   color: var(--medium);   border: 1px solid var(--medium-border); }
.badge-low      { background: var(--low-bg);      color: var(--low);      border: 1px solid var(--low-border); }
.badge-attack   { background: rgba(139,143,168,0.12); color: var(--text-secondary); border: 1px solid var(--border); }

.card-time {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Source */
.card-source {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 500;
}

/* Title */
.card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
}

/* Summary */
.card-summary {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

/* Read link */
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  margin-top: 2px;
  align-self: flex-start;
}

.card-link:hover { text-decoration: underline; }

/* ─────────────────────────────────────────
   STATES
───────────────────────────────────────── */
.loading-state,
.empty-state,
.error-state {
  text-align: center;
  padding: 60px 24px;
  color: var(--text-muted);
  font-size: 14px;
}

.error-state button {
  margin-top: 16px;
  padding: 8px 20px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 13px;
  cursor: pointer;
}

.load-more-wrap {
  display: flex;
  justify-content: center;
  margin-top: 24px;
}

.load-more-btn {
  padding: 10px 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.load-more-btn:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

/* ─────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────── */
@media (max-width: 600px) {
  .feed-grid { grid-template-columns: 1fr; }
  .stats-inner { gap: 8px; }
  .stat-card { min-width: 70px; padding: 8px 12px; }
  .stat-value { font-size: 18px; }
  .filter-inner { flex-direction: column; align-items: flex-start; }
  .search-wrap { max-width: 100%; width: 100%; }
}