/* ==========================================================================
   Mai Daily Brief — Newspaper-Style Reading Interface
   Plain CSS, no frameworks. WCAG AA compliant.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Colors — newspaper-inspired palette */
  --color-bg:            #fafaf8;
  --color-surface:       #ffffff;
  --color-text:          #1a1a1a;
  --color-text-muted:    #5c5c5c;
  --color-text-light:    #8a8a8a;
  --color-border:        #e0e0e0;
  --color-border-light:  #eeeeee;
  --color-accent:        #2c5282;
  --color-accent-hover:  #1a365d;
  --color-link:          #2b6cb0;
  --color-link-hover:    #1a4a7a;

  /* Priority colors */
  --color-priority-high:   #c53030;
  --color-priority-medium: #b7791f;
  --color-priority-low:    #a0aec0;

  /* Priority backgrounds (subtle) */
  --color-priority-high-bg:   #fff5f5;
  --color-priority-medium-bg: #fffff0;
  --color-priority-low-bg:    #f7fafc;

  /* Topic pill colors */
  --color-pill-bg:       #edf2f7;
  --color-pill-text:     #4a5568;

  /* Spacing scale */
  --space-xs:  0.25rem;   /*  4px */
  --space-sm:  0.5rem;    /*  8px */
  --space-md:  1rem;      /* 16px */
  --space-lg:  1.5rem;    /* 24px */
  --space-xl:  2rem;      /* 32px */
  --space-2xl: 3rem;      /* 48px */

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono:   'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
  --font-size-base: 1rem;       /* 16px */
  --font-size-sm:   0.875rem;   /* 14px */
  --font-size-xs:   0.75rem;    /* 12px */
  --font-size-lg:   1.125rem;   /* 18px */
  --font-size-xl:   1.5rem;     /* 24px */
  --font-size-2xl:  2rem;       /* 32px */
  --line-height:     1.6;

  /* Layout */
  --max-width:  800px;
  --radius-sm:  3px;
  --radius-md:  6px;

  /* Shadows */
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 2px 6px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.06);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}


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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover,
a:focus-visible {
  color: var(--color-link-hover);
  text-decoration: underline;
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}


/* --------------------------------------------------------------------------
   3. Layout — Container
   -------------------------------------------------------------------------- */
main {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-md) var(--space-2xl);
  flex: 1;
}


/* --------------------------------------------------------------------------
   4. Header — Newspaper Masthead
   -------------------------------------------------------------------------- */
header {
  text-align: center;
  padding: var(--space-lg) var(--space-md) var(--space-md);
  border-bottom: 2px solid var(--color-text);
  margin-bottom: var(--space-md);
}

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

header h1 {
  font-size: var(--font-size-2xl);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-transform: uppercase;
  flex: 1;
}

header h1 a {
  color: var(--color-text);
  text-decoration: none;
}

header h1 a:hover,
header h1 a:focus-visible {
  color: var(--color-text);
  text-decoration: none;
}

/* Header navigation */
.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-right: var(--space-md);
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text);
  background-color: var(--color-bg);
  text-decoration: none;
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Toggle sidebar button in header */
.btn-toggle-sidebar {
  position: absolute;
  right: 0;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  min-height: 36px;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn-toggle-sidebar:hover {
  background-color: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.btn-toggle-sidebar:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.btn-toggle-sidebar[aria-expanded="true"] {
  background-color: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

.sidebar-toggle-icon {
  font-size: var(--font-size-base);
  line-height: 1;
}

.sidebar-toggle-label {
  display: none;
}

@media (min-width: 640px) {
  .sidebar-toggle-label {
    display: inline;
  }
}


/* --------------------------------------------------------------------------
   5. Digest Header — Date, Controls, Filters
   -------------------------------------------------------------------------- */
.digest-header {
  margin-bottom: var(--space-lg);
}

.digest-date {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-sm);
}

.digest-date-raw {
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--color-text-muted);
}

/* Controls row */
.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
}

.control-form {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.control-form label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}

/* Select dropdowns — clean, consistent styling */
.control-form select {
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%235c5c5c'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 28px;
  min-height: 36px;
  transition: border-color var(--transition-fast);
}

.control-form select:hover {
  border-color: var(--color-text-muted);
}

.control-form select:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
  border-color: var(--color-accent);
}

/* Bulk action buttons (Expand All / Collapse All) */
.bulk-actions {
  display: flex;
  gap: var(--space-xs);
  margin-left: auto;
}

.btn-expand-all,
.btn-collapse-all {
  font-family: var(--font-family);
  font-size: var(--font-size-xs);
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  min-height: 32px;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn-expand-all:hover,
.btn-collapse-all:hover {
  background-color: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.btn-expand-all:focus-visible,
.btn-collapse-all:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}


/* --------------------------------------------------------------------------
   6. Cluster Cards
   -------------------------------------------------------------------------- */
.cluster-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.cluster-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition-normal);
}

.cluster-card:hover {
  box-shadow: var(--shadow-card-hover);
}

/* --- Card Header (clickable) --- */
.cluster-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  cursor: pointer;
  user-select: none;
  transition: background-color var(--transition-fast);
}

.cluster-header:hover {
  background-color: var(--color-bg);
}

/* Expand indicator triangle */
.expand-indicator {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  width: 1.25em;
  flex-shrink: 0;
  text-align: center;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

/* Rotate indicator when expanded */
.cluster-card.expanded .expand-indicator {
  transform: rotate(90deg);
}

/* Cluster label */
.cluster-label {
  flex: 1;
  font-size: var(--font-size-lg);
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
}

/* Source count badge */
.source-count-badge {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  background-color: var(--color-pill-bg);
  padding: 2px var(--space-sm);
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Priority indicator */
.priority-indicator {
  flex-shrink: 0;
  font-size: var(--font-size-sm);
  line-height: 1;
}

.priority-indicator.priority-high {
  color: var(--color-priority-high);
}

.priority-indicator.priority-medium {
  color: var(--color-priority-medium);
}

.priority-indicator.priority-low {
  color: var(--color-priority-low);
  opacity: 0.7;
}

/* --- Topic Pills --- */
.cluster-topics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding: 0 var(--space-md) var(--space-sm);
}

.topic-pill {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-pill-text);
  background-color: var(--color-pill-bg);
  padding: 2px var(--space-sm);
  border-radius: 999px;
  line-height: 1.4;
}

/* --- Cluster Body (expandable content) --- */
.cluster-body {
  display: none;
}

/* When parent card has .expanded class, show the body */
.cluster-card.expanded .cluster-body {
  display: block;
}

/* Also support the hidden attribute being removed directly */
.cluster-body:not([hidden]) {
  /* Let JS handle visibility via hidden attribute OR .expanded class */
}

/* When shown, animate in with opacity */
.cluster-card.expanded .cluster-body {
  animation: fadeIn var(--transition-normal) ease forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Summary text */
.cluster-summary {
  padding: 0 var(--space-md) var(--space-md);
  border-top: 1px solid var(--color-border-light);
  padding-top: var(--space-md);
}

.cluster-summary p {
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  margin: 0;
}

/* --- Source List --- */
.cluster-sources {
  padding: 0 var(--space-md) var(--space-md);
}

.cluster-sources h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

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

.source-item {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.source-item:last-child {
  border-bottom: none;
}

.source-icon {
  flex-shrink: 0;
  width: 1.25em;
  text-align: center;
}

.source-link {
  flex: 1;
  color: var(--color-link);
  word-break: break-word;
}

.source-link:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

/* External link indicator via CSS */
.source-link[target="_blank"]::after {
  content: " \2197";
  font-size: 0.75em;
  color: var(--color-text-light);
  vertical-align: super;
}

.source-type-badge {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  background-color: var(--color-border-light);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  flex-shrink: 0;
  text-transform: lowercase;
}


/* --------------------------------------------------------------------------
   6b. Page Wrapper — Sidebar Layout
   -------------------------------------------------------------------------- */
.page-wrapper {
  display: flex;
  flex: 1;
  position: relative;
}

/* --------------------------------------------------------------------------
   6c. Discovery Sidebar
   -------------------------------------------------------------------------- */
.discovery-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: 320px;
  max-width: 90vw;
  background-color: var(--color-surface);
  border-left: 1px solid var(--color-border);
  box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.discovery-sidebar.open {
  transform: translateX(0);
}

/* Sidebar header */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.sidebar-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin: 0;
}

.sidebar-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.sidebar-close:hover {
  color: var(--color-text);
  background-color: var(--color-border-light);
}

.sidebar-close:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

/* Sidebar content area */
.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
}

/* Sidebar sections */
.sidebar-section {
  margin-bottom: var(--space-lg);
}

.sidebar-section:last-child {
  margin-bottom: 0;
}

.sidebar-section h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border-light);
}

/* Loading state */
.sidebar-loading {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  padding: var(--space-sm) 0;
}

.sidebar-loading.error {
  color: var(--color-priority-high);
}

/* Empty state */
.sidebar-empty {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-style: italic;
  padding: var(--space-sm) 0;
  margin: 0;
}

/* Trending list */
.trending-list,
.anomaly-list,
.suggestion-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.trending-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: var(--font-size-sm);
}

.trending-item:last-child {
  border-bottom: none;
}

.trending-keyword {
  flex: 1;
  font-weight: 500;
  color: var(--color-text);
  word-break: break-word;
}

.trending-count {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: var(--color-pill-bg);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
}

.trend-indicator {
  font-size: var(--font-size-base);
  font-weight: bold;
  width: 1.5em;
  text-align: center;
}

.trend-rising {
  color: #22c55e; /* green */
}

.trend-falling {
  color: #ef4444; /* red */
}

.trend-stable {
  color: var(--color-text-light);
}

/* Anomaly list */
.anomaly-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: var(--font-size-sm);
}

.anomaly-item:last-child {
  border-bottom: none;
}

.anomaly-label {
  flex: 1;
  font-weight: 500;
  color: var(--color-text);
  word-break: break-word;
}

.anomaly-score {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-priority-medium);
  font-weight: 600;
}

/* Suggestion list */
.suggestion-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
  font-size: var(--font-size-sm);
}

.suggestion-item:last-child {
  border-bottom: none;
}

.suggestion-icon {
  flex-shrink: 0;
  width: 1.5em;
  height: 1.5em;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  font-weight: bold;
  color: var(--color-accent);
  background-color: var(--color-pill-bg);
  border-radius: var(--radius-sm);
}

.suggestion-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.suggestion-action {
  font-weight: 500;
  color: var(--color-text);
}

.suggestion-reason {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: 1.4;
}

.suggestion-confidence {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  flex-shrink: 0;
}

/* Sidebar footer */
.sidebar-footer {
  padding: var(--space-md);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.sidebar-link {
  display: block;
  text-align: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar-link:hover {
  background-color: var(--color-accent);
  color: white;
  text-decoration: none;
}

.sidebar-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Body overlay when sidebar is open on mobile */
body.sidebar-open::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.3);
  z-index: 999;
  pointer-events: none;
}

@media (min-width: 1024px) {
  body.sidebar-open::before {
    display: none;
  }
}


/* --------------------------------------------------------------------------
   7. Footer
   -------------------------------------------------------------------------- */
footer {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.digest-footer {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.token-usage {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  margin-top: var(--space-xs);
}


/* --------------------------------------------------------------------------
   8. Empty State
   -------------------------------------------------------------------------- */
.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  text-align: center;
}

.empty-message-container {
  max-width: 400px;
  padding: var(--space-xl);
}

.empty-message {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  line-height: var(--line-height);
  margin-bottom: var(--space-md);
}

.empty-action a {
  display: inline-block;
  font-size: var(--font-size-sm);
  color: var(--color-link);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.empty-action a:hover {
  background-color: var(--color-bg);
  border-color: var(--color-text-muted);
  text-decoration: none;
}


/* --------------------------------------------------------------------------
   9. Responsive — Mobile (<640px)
   -------------------------------------------------------------------------- */
@media (max-width: 639px) {
  header {
    padding: var(--space-md) var(--space-md) var(--space-sm);
  }

  .header-content {
    flex-wrap: wrap;
  }

  header h1 {
    font-size: var(--font-size-xl);
    width: 100%;
    margin-bottom: var(--space-sm);
  }

  .btn-toggle-sidebar {
    position: static;
    margin-left: auto;
  }

  main {
    padding: var(--space-sm) var(--space-md) var(--space-xl);
  }

  /* Sidebar adjustments for mobile */
  .discovery-sidebar {
    width: 100%;
    max-width: none;
  }

  .digest-date {
    font-size: var(--font-size-lg);
  }

  /* Stack controls vertically */
  .controls {
    flex-direction: column;
    align-items: stretch;
  }

  .control-form {
    width: 100%;
  }

  .control-form select {
    flex: 1;
    min-height: 44px;   /* Touch-friendly target */
    font-size: var(--font-size-base);
  }

  .bulk-actions {
    margin-left: 0;
    justify-content: flex-start;
  }

  .btn-expand-all,
  .btn-collapse-all {
    min-height: 44px;   /* Touch-friendly target */
    font-size: var(--font-size-sm);
    padding: var(--space-sm) var(--space-md);
  }

  /* Full-width cards, no extra border radius */
  .cluster-card {
    border-radius: var(--radius-sm);
  }

  .cluster-header {
    padding: var(--space-sm) var(--space-md);
    min-height: 44px;   /* Touch-friendly target */
  }

  .cluster-label {
    font-size: var(--font-size-base);
  }

  .cluster-topics {
    padding: 0 var(--space-md) var(--space-xs);
  }

  .cluster-summary {
    padding: var(--space-sm) var(--space-md) var(--space-md);
  }

  .cluster-sources {
    padding: 0 var(--space-md) var(--space-md);
  }

  /* Source items stack better on small screens */
  .source-item {
    flex-wrap: wrap;
    gap: var(--space-xs);
    padding: var(--space-sm) 0;
  }
}


/* --------------------------------------------------------------------------
   10. Responsive — Tablet (640px - 1024px)
   -------------------------------------------------------------------------- */
@media (min-width: 640px) and (max-width: 1024px) {
  main {
    padding: var(--space-md) var(--space-lg) var(--space-2xl);
  }
}


/* --------------------------------------------------------------------------
   11. Responsive — Desktop (>1024px)
   -------------------------------------------------------------------------- */
@media (min-width: 1025px) {
  main {
    padding: var(--space-lg) var(--space-md) var(--space-2xl);
  }
}


/* --------------------------------------------------------------------------
   12. Discovery Page Styles
   -------------------------------------------------------------------------- */
.discovery-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-lg);
}

.discovery-page h2 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-text);
  padding-bottom: var(--space-sm);
}

.page-description {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

.discovery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.discovery-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
}

.discovery-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.card-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

/* Discovery page loading state */
.discovery-page .loading-spinner {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  padding: var(--space-md) 0;
}

/* Error state for loading */
.discovery-page .loading-spinner.error,
.sidebar-loading.error {
  color: var(--color-error, #d32f2f);
}

/* Discovery page tables */
.trending-table,
.topics-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.trending-table th,
.trending-table td,
.topics-table th,
.topics-table td {
  padding: var(--space-sm) var(--space-xs);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.trending-table th,
.topics-table th {
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  font-size: var(--font-size-xs);
  letter-spacing: 0.04em;
}

.trending-table tbody tr:hover,
.topics-table tbody tr:hover {
  background-color: var(--color-bg);
}

/* Discovery page anomaly item - additional styles */
.discovery-card .anomaly-item {
  flex-wrap: wrap;
}

.discovery-card .anomaly-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  width: 100%;
  margin-top: var(--space-xs);
}

/* Discovery page suggestion type badges */
.suggestion-type {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px var(--space-sm);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-xs);
}

.suggestion-add_topic .suggestion-type {
  background-color: #dcfce7;
  color: #166534;
}

.suggestion-retire_topic .suggestion-type {
  background-color: #fef2f2;
  color: #991b1b;
}

.suggestion-add_keyword .suggestion-type {
  background-color: #dbeafe;
  color: #1e40af;
}

.suggestion-merge_topics .suggestion-type {
  background-color: #fef9c3;
  color: #854d0e;
}

/* Discovery page suggestion item layout */
.discovery-card .suggestion-item {
  display: block;
}

.discovery-card .suggestion-action {
  display: block;
  margin-bottom: var(--space-xs);
}

.discovery-card .suggestion-reason {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xs);
  line-height: 1.5;
}

.discovery-card .suggestion-confidence {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
}

/* Discovery page empty state override */
.discovery-card .empty-state {
  display: block;
  min-height: auto;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: var(--space-md) 0;
  text-align: left;
}

/* Discovery page responsive */
@media (max-width: 639px) {
  .discovery-page {
    padding: var(--space-md);
  }

  .discovery-page h2 {
    font-size: var(--font-size-xl);
  }

  .discovery-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .discovery-card {
    padding: var(--space-md);
  }

  .trending-table,
  .topics-table {
    font-size: var(--font-size-xs);
  }

  .trending-table th,
  .trending-table td,
  .topics-table th,
  .topics-table td {
    padding: var(--space-xs);
  }
}


/* --------------------------------------------------------------------------
   13. Print Styles
   -------------------------------------------------------------------------- */
@media print {
  /* Hide interactive controls and sidebar */
  .controls,
  .bulk-actions,
  .expand-indicator,
  .btn-toggle-sidebar,
  .discovery-sidebar {
    display: none !important;
  }

  /* Reset colors for print */
  body {
    background: white;
    color: black;
    font-size: 11pt;
  }

  header {
    border-bottom: 2px solid black;
    padding-bottom: 8pt;
  }

  /* Expand all cards for print */
  .cluster-body {
    display: block !important;
  }

  .cluster-body[hidden] {
    display: block !important;
  }

  /* Remove shadows and subtle backgrounds */
  .cluster-card {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .cluster-header {
    cursor: default;
  }

  .cluster-header:hover {
    background-color: transparent;
  }

  /* Links: show URL after text */
  .source-link::after {
    content: " (" attr(href) ")" !important;
    font-size: 8pt;
    color: #666;
    word-break: break-all;
  }

  .source-type-badge {
    border: 1px solid #ccc;
    background: none;
  }

  /* No page break in mid-card */
  .cluster-card {
    break-inside: avoid;
  }

  footer {
    border-top: 1px solid #ccc;
    font-size: 9pt;
  }

  .token-usage {
    display: none;
  }
}