* {
  box-sizing: border-box;
}

:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-soft: #f9fafc;
  --border: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --accent: #1d4ed8;
  --accent-soft: #dbeafe;
  --success-bg: #dcfce7;
  --success-text: #166534;
  --error-bg: #fee2e2;
  --error-text: #991b1b;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.06);
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

/* HERO */

.hero {
  background: linear-gradient(180deg, #ffffff 0%, #eef4ff 100%);
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  padding: 56px 20px 40px;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.05;
}

.hero-text {
  max-width: 720px;
  margin: 16px 0 0;
  font-size: 1.1rem;
  color: var(--muted);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
  margin-top: 32px;
}

.hero-stat {
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 18px;
  box-shadow: var(--shadow);
}

.hero-stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
}

.hero-stat-value {
  display: block;
  margin-top: 6px;
  font-size: 1.1rem;
  font-weight: 700;
}

/* LAYOUT */

main {
  padding: 40px 0 64px;
}

.section + .section {
  margin-top: 44px;
}

.section-heading {
  margin-bottom: 20px;
}

.section-heading h2 {
  margin: 0 0 6px;
  font-size: 1.7rem;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
}

/* STORIES GRID */

.stories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
}

/* STORY CARD */

.story-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 22px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.story-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(17, 24, 39, 0.08);
}

/* FEATURED STORY */

.story-card-featured {
  grid-column: 1 / -1;
}

.story-card-featured h3 {
  font-size: 1.55rem;
  line-height: 1.2;
}

.story-card-featured .story-rank {
  color: var(--accent);
  font-weight: 700;
}

/* TOPLINE */

.story-topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.story-rank {
  color: var(--muted);
  font-size: 0.9rem;
}

/* SOURCE CHIP */

.story-source-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
}

/* TITLE */

.story-card h3 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  line-height: 1.3;
}

/* STATUS */

.story-status {
  margin-bottom: 12px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 700;
}

.status-pill.success {
  background: var(--success-bg);
  color: var(--success-text);
}

.status-pill.error {
  background: var(--error-bg);
  color: var(--error-text);
}

/* SUMMARY */

.story-summary {
  margin: 0;
  font-size: 1rem;
  color: #1f2937;
}

.story-summary-muted {
  color: var(--muted);
}

/* ERROR */

.story-error-note {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--error-bg);
  color: var(--error-text);
  font-size: 0.92rem;
  border: 1px solid #fecaca;
}

/* CONTEXT */

.story-context {
  margin-top: 18px;
  padding: 16px;
  border-radius: 14px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
}

.story-context h4 {
  margin: 0 0 8px;
  font-size: 0.95rem;
}

.story-context p {
  margin: 0;
  color: #374151;
  font-size: 0.96rem;
}

/* FOOTER */

.story-footer {
  margin-top: auto;
  padding-top: 20px;
}

.story-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  color: var(--muted);
  font-size: 0.92rem;
}

.story-links {
  margin-top: 14px;
}

.story-links a {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.story-links a:hover {
  text-decoration: underline;
}

/* SUPPORTING ARTICLES */

.supporting-details {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
}

summary {
  cursor: pointer;
  font-weight: 700;
}

.supporting-list {
  margin: 12px 0 0;
  padding-left: 18px;
}

.supporting-list li + li {
  margin-top: 10px;
}

/* TRANSPARENCY SECTION */

.transparency-section {
  margin-top: 48px;
}

.transparency-details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
}

.transparency-details summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  list-style: none;
}

.transparency-details summary::-webkit-details-marker {
  display: none;
}

.transparency-details summary::after {
  content: "+";
  float: right;
  color: var(--muted);
  font-weight: 700;
}

.transparency-details[open] summary::after {
  content: "−";
}

.transparency-heading {
  margin-top: 18px;
}

/* SYSTEM GRID */

.system-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.system-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 18px;
  box-shadow: var(--shadow);
}

.system-label {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 8px;
}

.system-value {
  display: inline-block;
  font-size: 1rem;
  font-weight: 700;
  word-break: break-word;
}

/* STATES */

.loading,
.empty-state,
.error {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.error {
  color: var(--error-text);
  font-weight: 700;
}

/* RESPONSIVE */

@media (max-width: 720px) {
  .hero-inner {
    padding-top: 44px;
    padding-bottom: 32px;
  }

  main {
    padding-top: 28px;
  }

  .story-card {
    padding: 18px;
  }

  .story-topline {
    flex-direction: column;
    align-items: flex-start;
  }

  .story-card-featured {
    grid-column: auto;
  }
}