/*
 * css/timeline.css
 * Case Timeline page styles — Evident ICU Phase 3
 * Dark-themed, forensic-grade, deterministic display
 */

/* ── Layout ──────────────────────────────────────────────────── */

.tl-root {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: var(--space-md, 1rem);
  min-height: 0;
}

.tl-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm, 0.5rem);
  align-items: flex-end;
  padding: var(--space-md, 1rem);
  background: var(--app-surface, #1a1f2e);
  border: 1px solid var(--app-border, #2d3448);
  border-radius: 0.5rem;
}

.tl-controls__group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 160px;
}

.tl-controls__label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--app-text-muted, #8892a4);
}

.tl-controls__input,
.tl-controls__select {
  padding: 0.4rem 0.6rem;
  background: var(--app-bg, #0f1117);
  border: 1px solid var(--app-border, #2d3448);
  border-radius: 0.25rem;
  color: var(--app-text, #e2e8f0);
  font-size: 0.85rem;
  font-family: inherit;
  transition: border-color 150ms ease;
}

.tl-controls__input:focus,
.tl-controls__select:focus {
  outline: 2px solid var(--gem-sapphire-flat, #3b82f6);
  outline-offset: 1px;
  border-color: var(--gem-sapphire-flat, #3b82f6);
}

.tl-controls__input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(0.6);
  cursor: pointer;
}

.tl-controls__actions {
  display: flex;
  gap: var(--space-sm, 0.5rem);
  align-items: flex-end;
  margin-left: auto;
}

/* ── Stats Bar ───────────────────────────────────────────────── */

.tl-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md, 1rem);
  padding: 0.75rem var(--space-md, 1rem);
  background: var(--app-surface, #1a1f2e);
  border: 1px solid var(--app-border, #2d3448);
  border-radius: 0.5rem;
}

.tl-stats__item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.tl-stats__value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--app-text, #e2e8f0);
  font-variant-numeric: tabular-nums;
}

.tl-stats__label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--app-text-muted, #8892a4);
}

.tl-stats__sep {
  width: 1px;
  background: var(--app-border, #2d3448);
  align-self: stretch;
}

/* ── Timeline Container ──────────────────────────────────────── */

.tl-body {
  position: relative;
  overflow-y: auto;
  max-height: calc(100vh - 340px);
  padding: var(--space-md, 1rem) 0;
}

/* Vertical spine */
.tl-spine {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 152px;
  width: 2px;
  background: var(--app-border, #2d3448);
  pointer-events: none;
}

/* ── Event Entry ─────────────────────────────────────────────── */

.tl-event {
  display: grid;
  grid-template-columns: 148px 2px 1fr;
  gap: 0 var(--space-md, 1rem);
  padding: 0.5rem 0;
  position: relative;
}

.tl-event__date-col {
  text-align: right;
  padding-right: var(--space-md, 1rem);
  padding-top: 0.1rem;
}

.tl-event__date {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--app-text-muted, #8892a4);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.tl-event__date--same-day {
  opacity: 0;
}

.tl-event__connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.tl-event__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gem-sapphire-flat, #3b82f6);
  border: 2px solid var(--app-bg, #0f1117);
  flex-shrink: 0;
  margin-top: 3px;
  transition:
    transform 150ms ease,
    box-shadow 150ms ease;
}

.tl-event:hover .tl-event__dot {
  transform: scale(1.4);
  box-shadow: 0 0 0 4px oklch(56% 0.2 250deg / 15%);
}

.tl-event__card {
  background: var(--app-surface, #1a1f2e);
  border: 1px solid var(--app-border, #2d3448);
  border-radius: 0.5rem;
  padding: 0.65rem 0.875rem;
  margin-bottom: 0.5rem;
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease;
}

.tl-event:hover .tl-event__card {
  border-color: oklch(56% 0.2 250deg / 40%);
  box-shadow: 0 2px 8px oklch(0% 0 0deg / 20%);
}

.tl-event__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
  flex-wrap: wrap;
}

.tl-event__type-badge {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.15rem 0.45rem;
  border-radius: 0.25rem;
  white-space: nowrap;
}

.tl-event__type-badge--email {
  background: oklch(56% 0.18 250deg / 15%);
  color: oklch(75% 0.12 250deg);
  border: 1px solid oklch(56% 0.18 250deg / 30%);
}

.tl-event__type-badge--document {
  background: oklch(55% 0.16 170deg / 15%);
  color: oklch(72% 0.1 170deg);
  border: 1px solid oklch(55% 0.16 170deg / 30%);
}

/* stylelint-disable-next-line selector-class-pattern */
.tl-event__type-badge--entity_date {
  background: oklch(60% 0.2 80deg / 15%);
  color: oklch(75% 0.14 80deg);
  border: 1px solid oklch(60% 0.2 80deg / 30%);
}

/* stylelint-disable-next-line selector-class-pattern */
.tl-event__type-badge--legal_hold {
  background: oklch(56% 0.24 30deg / 15%);
  color: oklch(70% 0.18 30deg);
  border: 1px solid oklch(56% 0.24 30deg / 30%);
}

.tl-event__type-badge--file {
  background: oklch(55% 0.14 290deg / 15%);
  color: oklch(72% 0.1 290deg);
  border: 1px solid oklch(55% 0.14 290deg / 30%);
}

.tl-event__description {
  font-size: 0.85rem;
  color: var(--app-text, #e2e8f0);
  line-height: 1.45;
}

.tl-event__meta {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.3rem;
  flex-wrap: wrap;
}

.tl-event__meta-item {
  font-size: 0.72rem;
  color: var(--app-text-muted, #8892a4);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* ── Gap Indicator ───────────────────────────────────────────── */

.tl-gap {
  display: grid;
  grid-template-columns: 148px 2px 1fr;
  gap: 0 var(--space-md, 1rem);
  padding: 0.75rem 0;
}

.tl-gap__date-col {
  /* empty */
}

.tl-gap__connector {
  display: flex;
  align-items: center;
  justify-content: center;
}

.tl-gap__line {
  width: 2px;
  height: 100%;
  background: repeating-linear-gradient(
    to bottom,
    oklch(56% 0.24 30deg / 50%) 0,
    oklch(56% 0.24 30deg / 50%) 6px,
    transparent 6px,
    transparent 12px
  );
}

.tl-gap__label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.875rem;
  background: oklch(56% 0.24 30deg / 8%);
  border: 1px solid oklch(56% 0.24 30deg / 25%);
  border-radius: 0.375rem;
  font-size: 0.75rem;
  color: oklch(70% 0.18 30deg);
}

.tl-gap__label svg {
  flex-shrink: 0;
  opacity: 0.8;
}

/* ── Skeleton Loading ────────────────────────────────────────── */

.tl-skeleton {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: var(--space-md, 1rem);
}

.tl-skeleton__row {
  display: grid;
  grid-template-columns: 148px 2px 1fr;
  gap: 0 var(--space-md, 1rem);
  align-items: flex-start;
}

.tl-skeleton__date {
  height: 14px;
  width: 80px;
  margin-left: auto;
  border-radius: 4px;
  background: var(--app-surface, #1a1f2e);
  animation: tl-shimmer 1.4s ease-in-out infinite;
}

.tl-skeleton__dot-col {
  display: flex;
  justify-content: center;
  padding-top: 4px;
}

.tl-skeleton__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--app-surface, #1a1f2e);
  animation: tl-shimmer 1.4s ease-in-out infinite;
}

.tl-skeleton__card {
  height: 68px;
  border-radius: 0.5rem;
  background: var(--app-surface, #1a1f2e);
  animation: tl-shimmer 1.4s ease-in-out infinite;
}

@keyframes tl-shimmer {
  0%,
  100% {
    opacity: 0.4;
  }

  50% {
    opacity: 0.9;
  }
}

/* ── Empty / Error States ────────────────────────────────────── */

.tl-empty {
  text-align: center;
  padding: 4rem var(--space-md, 1rem);
}

.tl-empty__icon {
  margin-bottom: 1rem;
  opacity: 0.3;
}

.tl-empty__heading {
  font-size: 1rem;
  font-weight: 600;
  color: var(--app-text, #e2e8f0);
  margin-bottom: 0.5rem;
}

.tl-empty__body {
  font-size: 0.85rem;
  color: var(--app-text-muted, #8892a4);
  max-width: 380px;
  margin-inline: auto;
  line-height: 1.5;
}

.tl-error {
  padding: 1rem var(--space-md, 1rem);
  background: oklch(40% 0.2 30deg / 10%);
  border: 1px solid oklch(50% 0.2 30deg / 30%);
  border-radius: 0.5rem;
  color: oklch(75% 0.15 30deg);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ── History Sidebar ─────────────────────────────────────────── */

.tl-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-md, 1rem);
}

@media (width <= 900px) {
  .tl-layout {
    grid-template-columns: 1fr;
  }
}

.tl-history {
  background: var(--app-surface, #1a1f2e);
  border: 1px solid var(--app-border, #2d3448);
  border-radius: 0.5rem;
  padding: var(--space-md, 1rem);
  height: fit-content;
  position: sticky;
  top: 1rem;
}

.tl-history__heading {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--app-text-muted, #8892a4);
  margin-bottom: var(--space-sm, 0.5rem);
}

.tl-history__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tl-history__item {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--app-border, #2d3448);
  border-radius: 0.375rem;
  cursor: pointer;
  transition:
    border-color 150ms ease,
    background 150ms ease;
}

.tl-history__item:hover,
.tl-history__item--active {
  border-color: var(--gem-sapphire-flat, #3b82f6);
  background: oklch(56% 0.2 250deg / 6%);
}

.tl-history__item-count {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--app-text, #e2e8f0);
}

.tl-history__item-date {
  font-size: 0.72rem;
  color: var(--app-text-muted, #8892a4);
  margin-top: 0.15rem;
}

.tl-history__item-hash {
  font-family: monospace;
  font-size: 0.65rem;
  color: var(--app-text-muted, #8892a4);
  opacity: 0.7;
  margin-top: 0.25rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Hash Badge ──────────────────────────────────────────────── */

.tl-hash-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: monospace;
  font-size: 0.7rem;
  color: var(--app-text-muted, #8892a4);
  background: var(--app-bg, #0f1117);
  border: 1px solid var(--app-border, #2d3448);
  border-radius: 0.25rem;
  padding: 0.2rem 0.5rem;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Tier Gate ───────────────────────────────────────────────── */

.tl-tier-gate {
  text-align: center;
  padding: 3rem var(--space-md, 1rem);
}

.tl-tier-gate__icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.tl-tier-gate__heading {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--app-text, #e2e8f0);
  margin-bottom: 0.5rem;
}

.tl-tier-gate__body {
  font-size: 0.875rem;
  color: var(--app-text-muted, #8892a4);
  margin-bottom: 1.5rem;
  max-width: 340px;
  margin-inline: auto;
}

/* ── Toast ───────────────────────────────────────────────────── */

.tl-toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 16px oklch(0% 0 0deg / 30%);
  transition:
    opacity 300ms ease,
    transform 300ms ease;
}

.tl-toast--success {
  background: oklch(35% 0.1 170deg);
  border: 1px solid oklch(55% 0.16 170deg / 50%);
  color: oklch(85% 0.08 170deg);
}

.tl-toast--error {
  background: oklch(30% 0.15 30deg);
  border: 1px solid oklch(50% 0.2 30deg / 50%);
  color: oklch(80% 0.1 30deg);
}

.tl-toast.tl-toast--hidden {
  opacity: 0;
  transform: translateY(0.5rem);
  pointer-events: none;
}

/* ── Responsive ──────────────────────────────────────────────── */

@media (width <= 640px) {
  .tl-controls {
    flex-direction: column;
  }

  .tl-controls__group {
    min-width: 0;
    width: 100%;
  }

  .tl-controls__actions {
    margin-left: 0;
    width: 100%;
  }

  .tl-spine {
    left: 80px;
  }

  .tl-event,
  .tl-gap,
  .tl-skeleton__row {
    grid-template-columns: 76px 2px 1fr;
  }
}

/* ── Reduced motion ──────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .tl-event__dot,
  .tl-event__card,
  .tl-history__item,
  .tl-toast {
    transition: none;
  }

  .tl-skeleton__date,
  .tl-skeleton__dot,
  .tl-skeleton__card {
    animation: none;
    opacity: 0.6;
  }
}