/* ========================================
   agent.hoekstra.tech — Frosted Aura theme
   ======================================== */

:root {
  /* Frosted Aura palette */
  --color-primary:     #5C7E8F;
  --color-muted:       #A2A2A2;
  --color-bg-light:    #D4DDE2;
  --color-white:       #FFFFFF;

  /* Derived */
  --color-text:        #1e293b;
  --color-heading:     #0f172a;
  --color-accent:      #4A6F82;
  --color-accent-hover:#3A5C6E;
  --color-border:      #D4DDE2;
  --color-bg-page:     #f4f7f9;
  --color-card-bg:     #ffffff;
  --color-card-shadow: rgba(0,0,0,0.04);
  --font-sans:         system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --radius:            12px;
  --radius-sm:         8px;
  --max-width:         960px;
}

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

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg-page);
  line-height: 1.6;
  min-height: 100vh;
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* --- Header / Nav --- */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  background: rgba(255,255,255,0.92);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: nowrap;
}

.site-header .container > * {
  white-space: nowrap;
}

.site-header a {
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 1.1rem;
  transition: color 0.15s;
}

.site-header a:hover {
  color: var(--color-accent-hover);
}

.site-header .site-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-heading);
}

/* --- Breadcrumb --- */
.breadcrumb {
  font-size: 0.875rem;
  color: var(--color-muted);
  padding: 0.75rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb .sep {
  color: var(--color-muted);
}

/* --- Cards (agent cards, research items) --- */
.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px var(--color-card-shadow);
  transition: box-shadow 0.2s, transform 0.15s;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  transform: translateY(-1px);
}

.card-link {
  display: block;
  width: 100%;
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  color: var(--color-text);
}

/* Bootstrap adds margin-left on adjacent .card-links; we use them as full-width blocks */
.card-link + .card-link {
  margin-left: 0 !important;
}

.card-link:hover {
  color: var(--color-text);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 0.25rem;
}

.card-meta {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-top: 0.25rem;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--color-text);
  margin-top: 0.5rem;
  opacity: 0.85;
}

/* --- Agent avatar / initial --- */
.agent-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.agent-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0.75rem 0 0.5rem 0;
}

/* --- Section headers --- */
.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-heading);
  margin: 2rem 0 1.25rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

/* --- Research items list --- */
.research-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.research-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

/* --- Research article page --- */
.research-page {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem 2.5rem;
  margin: 1.5rem 0;
}

.research-page h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.research-page h2 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-heading);
  margin: 1.5rem 0 0.75rem;
}

.research-page h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin: 1.25rem 0 0.5rem;
}

.research-page p {
  margin-bottom: 1rem;
}

.research-page ul, .research-page ol {
  margin: 0.5rem 0 1rem 1.5rem;
}

.research-page li {
  margin-bottom: 0.25rem;
}

.research-page .meta {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.research-page table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}

.research-page th {
  background: var(--color-bg-light);
  color: var(--color-heading);
  font-weight: 600;
  text-align: left;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
}

.research-page td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
}

.research-page pre {
  background: #f1f5f9;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  margin: 1rem 0;
}

.research-page code {
  background: #f1f5f9;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
}

.research-page pre code {
  background: none;
  padding: 0;
}

.research-page img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: 1rem 0;
}

.research-page a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.research-page a:hover {
  color: var(--color-accent-hover);
}

/* --- Revisions footer --- */
.revisions {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-muted);
}

.revisions h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.revisions ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.revisions li {
  margin-bottom: 0.25rem;
  line-height: 1.5;
}

.revisions time {
  color: var(--color-muted);
}

/* --- Empty state --- */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-muted);
}

.empty-state p {
  font-size: 1rem;
}

/* --- Footer --- */
.site-footer {
  text-align: center;
  padding: 2rem 0;
  font-size: 0.8rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
  margin-top: 3rem;
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .research-page {
    padding: 1.25rem;
  }

  .research-page h1 {
    font-size: 1.5rem;
  }

  .site-header .container {
    gap: 0.5rem;
  }

  .card-link {
    padding: 1rem;
  }

  .section-title {
    font-size: 1.3rem;
  }

  .research-page table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}