/* ParaSensei — Mobile-first stylesheet */

:root {
  --color-bg: #ffffff;
  --color-surface: #f8f9fa;
  --color-text: #1a1a1a;
  --color-text-secondary: #666;
  --color-border: #e0e0e0;
  --color-accent: #2196F3;
  --color-good: #4CAF50;
  --color-ok: #FF9800;
  --color-bad: #F44336;
  --color-header-bg: #1a1a2e;
  --color-header-text: #ffffff;
  --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
  --max-width: 800px;
  --spacing: 1rem;
}

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-stack);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

/* Header / Nav */
header {
  background: var(--color-header-bg);
  color: var(--color-header-text);
  padding: 1rem var(--spacing);
  position: sticky;
  top: 0;
  z-index: 100;
}

header .container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

header h1 span { color: var(--color-accent); }

header nav a {
  color: var(--color-header-text);
  text-decoration: none;
  font-size: 0.875rem;
  opacity: 0.8;
  margin-left: 1.5rem;
}

header nav a:hover { opacity: 1; }

/* Main content */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing);
}

/* Report header */
.report-header {
  padding: 1.5rem 0;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 1.5rem;
}

.report-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.report-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.report-meta span { white-space: nowrap; }

/* Metric cards */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.metric-card {
  background: var(--color-surface);
  border-radius: 8px;
  padding: 1rem;
  text-align: center;
  border-left: 4px solid var(--color-border);
}

.metric-card.good { border-left-color: var(--color-good); }
.metric-card.ok { border-left-color: var(--color-ok); }
.metric-card.bad { border-left-color: var(--color-bad); }

.metric-card .value {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.2;
}

.metric-card .label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.25rem;
}

.metric-card .context {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

/* Charts */
.chart-container {
  margin: 1.5rem 0;
}

.chart-container img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--color-border);
}

.chart-container .caption {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 0.5rem;
  text-align: center;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.5rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

th, td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

th {
  background: var(--color-surface);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-secondary);
  position: sticky;
  top: 0;
}

tr:hover { background: var(--color-surface); }

/* Section headings */
.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

/* Coaching notes */
.coaching {
  background: #f0f7ff;
  border-left: 4px solid var(--color-accent);
  border-radius: 0 6px 6px 0;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}

.coaching h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-accent);
}

.coaching p {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.coaching p:last-child { margin-bottom: 0; }

/* Corpus disclaimer */
.corpus-note {
  background: var(--color-surface);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin: 1.5rem 0;
}

/* Footer */
footer {
  max-width: var(--max-width);
  margin: 3rem auto 0;
  padding: 1.5rem var(--spacing);
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  text-align: center;
}

/* Landing page */
.hero {
  padding: 3rem 0 2rem;
  text-align: center;
}

.hero h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.hero p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

.reports-list {
  list-style: none;
  margin: 1.5rem 0;
}

.reports-list li {
  border-bottom: 1px solid var(--color-border);
}

.reports-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  text-decoration: none;
  color: var(--color-text);
  min-height: 44px;
}

.reports-list a:hover { color: var(--color-accent); }

.reports-list .pilot-name { font-weight: 600; }
.reports-list .flight-date { color: var(--color-text-secondary); font-size: 0.875rem; }

/* Responsive */
@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  
  .metric-card {
    display: flex;
    align-items: center;
    text-align: left;
    gap: 1rem;
  }
  
  .metric-card .value { font-size: 1.5rem; min-width: 60px; }
  .metric-card .info { flex: 1; }
  
  .report-header h2 { font-size: 1.25rem; }
  
  table { font-size: 0.75rem; }
  th, td { padding: 0.4rem 0.5rem; }
}

@media (min-width: 481px) and (max-width: 768px) {
  .metrics-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}