/* Phase 4A — macOS-style design system. */

:root {
  /* Backgrounds */
  --color-bg: #f7f7f8;
  --color-card: #ffffff;
  --color-card-hover: #fdfdfd;
  --color-block-subtle: #f3f4f6;

  /* Borders */
  --color-border: #e5e7eb;
  --color-border-strong: #d1d5db;

  /* Text */
  --color-text-primary: #111827;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;

  /* Yellow accent */
  --color-accent: #FFCC00;
  --color-accent-hover: #E6B800;
  --color-accent-soft: #FFCC0033;

  /* Platform indicators */
  --color-thumbtack: #1A6BFF;
  --color-yelp: #D32323;
  --color-unknown: #9CA3AF;

  /* Shadows */
  --shadow-card: 0 2px 8px rgba(15, 23, 42, 0.08);
  --shadow-card-hover: 0 4px 16px rgba(15, 23, 42, 0.10);
  --shadow-card-new: 0 0 0 2px var(--color-accent);

  /* Spacing scale (8-pt grid) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;

  /* Typography */
  --font-base: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
  --font-mono: "SF Mono", ui-monospace, Monaco, "Cascadia Code", monospace;

  /* Sizes */
  --text-xs: 11px;
  --text-sm: 13px;
  --text-base: 14px;
  --text-md: 15px;
  --text-lg: 17px;
  --text-xl: 20px;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-base);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─── App header ─────────────────────────────────────────────────────── */

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4);
  height: 56px;
  padding: var(--space-3) var(--space-6);
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
}

.app-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  justify-self: start;
}

.app-header__accent {
  display: inline-block;
  width: 4px;
  height: 24px;
  border-radius: 2px;
  background: var(--color-accent);
}

.app-header__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  justify-self: end;
}

/* ─── View tabs (segmented control) ──────────────────────────────────── */

.view-tabs {
  display: flex;
  gap: var(--space-1);
  padding: 3px;
  background: var(--color-block-subtle);
  border-radius: var(--radius-md);
}

.view-tab {
  padding: var(--space-1) var(--space-3);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast),
              box-shadow var(--transition-fast);
}

.view-tab:hover:not(.view-tab--active) {
  color: var(--color-text-primary);
}

.view-tab--active {
  color: var(--color-text-primary);
  background: var(--color-card);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08);
}

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

/* ─── Unknown badge ──────────────────────────────────────────────────── */

.unknown-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-block-subtle);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.unknown-badge:hover {
  color: var(--color-text-primary);
  background: var(--color-border);
}

.unknown-badge--active {
  color: var(--color-text-primary);
  background: var(--color-accent);
}

.unknown-badge--active:hover {
  background: var(--color-accent-hover);
}

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

/* ─── Main container ─────────────────────────────────────────────────── */

main {
  max-width: 920px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
}

/* ─── Lead card ──────────────────────────────────────────────────────── */

.lead-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base);
}

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

.lead-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.lead-card__identity {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.lead-card__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
}

.lead-card__time-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.lead-card__time {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
}

.freshness-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

/* ─── Platform badge ─────────────────────────────────────────────────── */

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: var(--color-block-subtle);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
}

.platform-badge__dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-unknown);
}

.platform-badge--thumbtack .platform-badge__dot {
  background: var(--color-thumbtack);
}

.platform-badge--yelp .platform-badge__dot {
  background: var(--color-yelp);
}

.platform-badge--unknown .platform-badge__dot {
  background: var(--color-unknown);
}

/* ─── Lead category ──────────────────────────────────────────────────── */

.lead-card__category {
  margin: 0 0 var(--space-4) 0;
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-accent);
  font-size: var(--text-md);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text-primary);
}

/* ─── Lead meta block ────────────────────────────────────────────────── */

.lead-card__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin: 0 0 var(--space-4) 0;
}

.meta-row {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: var(--space-2);
  align-items: baseline;
}

.meta-row dt {
  margin: 0;
  font-size: var(--text-base);
  line-height: 1;
}

.meta-row dd {
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-text-primary);
}

/* ─── Section labels ─────────────────────────────────────────────────── */

.section-label {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* ─── Customer answers ───────────────────────────────────────────────── */

.lead-card__answers {
  margin-bottom: var(--space-4);
}

.answers-text {
  margin: 0;
  font-family: var(--font-base);
  font-size: var(--text-base);
  line-height: 1.55;
  color: var(--color-text-primary);
  white-space: pre-wrap;
}

/* ─── Messages ───────────────────────────────────────────────────────── */

.lead-card__messages {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.messages-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.message-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-block-subtle);
  border-radius: var(--radius-md);
}

.message-text {
  flex: 1;
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-text-primary);
}

.message-time {
  flex-shrink: 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
}

/* ─── Open on platform CTA ───────────────────────────────────────────── */

.lead-card__open-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  background: var(--color-block-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--transition-fast), border-color var(--transition-fast),
              color var(--transition-fast);
  align-self: flex-start;
}

.lead-card__open-link:hover {
  color: var(--color-text-primary);
  background: var(--color-card);
  border-color: var(--color-accent);
}

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

.lead-card__open-link-arrow {
  color: var(--color-text-secondary);
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.lead-card__open-link:hover .lead-card__open-link-arrow {
  transform: translateX(2px);
  color: var(--color-accent);
}

/* ─── Raw JSON toggle ────────────────────────────────────────────────── */

.lead-card__raw {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.lead-card__raw-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) 0;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  list-style: none;
  cursor: pointer;
  user-select: none;
  transition: color var(--transition-fast);
}

.lead-card__raw-toggle::-webkit-details-marker {
  display: none;
}

.lead-card__raw-toggle::before {
  content: "▸";
  font-size: 10px;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.lead-card__raw[open] .lead-card__raw-toggle::before {
  transform: rotate(90deg);
}

.lead-card__raw-toggle:hover {
  color: var(--color-text-primary);
}

.lead-card__raw-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.lead-card__raw-toggle-count {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.lead-card__raw-content {
  margin-top: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.raw-event {
  padding: var(--space-3) var(--space-4);
  background: var(--color-block-subtle);
  border-radius: var(--radius-md);
}

.raw-event__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.raw-event__type {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-text-primary);
}

.raw-event__time {
  font-variant-numeric: tabular-nums;
}

.raw-event__payload {
  margin: 0;
  padding: var(--space-3);
  max-height: 400px;
  overflow: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  white-space: pre;
  tab-size: 2;
}

.raw-event__payload::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.raw-event__payload::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 4px;
}

.raw-event__payload::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ─── Unknown event card ─────────────────────────────────────────────── */

.unknown-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base);
}

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

.unknown-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.unknown-card__identity {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
  min-width: 0;
}

.unknown-card__subject {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.unknown-card__time {
  flex-shrink: 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
}

.unknown-card__from {
  margin: 0 0 var(--space-3) 0;
  font-size: var(--text-base);
  color: var(--color-text-secondary);
}

/* ─── New-card animation ─────────────────────────────────────────────── */

@keyframes slide-in {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes new-glow {
  0%, 70% { box-shadow: var(--shadow-card-new); }
  100%    { box-shadow: var(--shadow-card); }
}

.lead-card--new {
  animation: slide-in var(--transition-slow), new-glow 1500ms ease-out;
}

/* ─── Pagination ─────────────────────────────────────────────────────── */

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-5);
  max-width: 920px;
  margin: var(--space-8) auto 0;
  padding: var(--space-6) var(--space-4) var(--space-6);
}

.pagination__arrow {
  padding: var(--space-1) var(--space-2);
  font-family: inherit;
  font-size: 18px;
  line-height: 1;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.pagination__arrow:hover:not(:disabled) {
  color: var(--color-accent);
}

.pagination__arrow:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.pagination__arrow:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

.page-indicator {
  min-width: 50px;
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
}

/* ─── Empty state ────────────────────────────────────────────────────── */

.empty-state {
  text-align: center;
  padding-top: var(--space-8);
}

.empty-state__title {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--text-md);
  font-weight: 500;
  color: var(--color-text-primary);
}

.empty-state__hint {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* ─── Mobile (≤ 640px) ───────────────────────────────────────────────── */

@media (max-width: 640px) {
  .app-header {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: var(--space-2);
    height: auto;
    padding: var(--space-2) var(--space-4);
  }

  .app-header__brand { grid-column: 1; grid-row: 1; }
  .header-actions { grid-column: 2; grid-row: 1; }
  .view-tabs {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: center;
  }

  main {
    padding: var(--space-3);
  }

  .lead-card {
    padding: var(--space-4);
  }

  .message-item {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
  }

  .pagination {
    padding: var(--space-4) var(--space-3);
    margin-top: var(--space-6);
  }

  .pagination__arrow {
    padding: var(--space-2) var(--space-3);
    font-size: 20px;
  }
}