:root {
  color-scheme: dark;
  --bg: #050505;
  --surface: rgba(19, 19, 19, 0.94);
  --surface-hover: #242424;
  --ink: #dedede;
  --muted: #858585;
  --faint: #2b2b2b;
  --line: #555;
  --strong: #f0f0f0;
  --shadow: rgba(0, 0, 0, 0.36);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body[data-theme="light"] {
  color-scheme: light;
  --bg: #f1f1ef;
  --surface: rgba(255, 255, 253, 0.94);
  --surface-hover: #ededeb;
  --ink: #262626;
  --muted: #747474;
  --faint: #d5d5d1;
  --line: #999;
  --strong: #111;
  --shadow: rgba(0, 0, 0, 0.12);
}

* { box-sizing: border-box; }

html, body, .timeline-app {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  color: var(--ink);
  background: var(--bg);
  transition: color 180ms ease, background 180ms ease;
}

button, input, select {
  font: inherit;
}

button, select {
  cursor: pointer;
}

.topbar {
  position: fixed;
  z-index: 20;
  top: 18px;
  left: 18px;
  display: flex;
  width: min(760px, calc(100% - 160px));
  gap: 8px;
  align-items: center;
}

.topbar-button,
.topbar-link,
.search-form,
.floating-panel,
.zoom-controls {
  border: 1px solid var(--faint);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 8px 30px var(--shadow);
  backdrop-filter: blur(18px);
}

.history-controls {
  position: absolute;
  z-index: 10;
  left: 18px;
  bottom: 18px;
  display: flex;
  overflow: hidden;
  border: 1px solid var(--faint);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 8px 30px var(--shadow);
  backdrop-filter: blur(18px);
}

.history-controls button {
  width: 42px;
  height: 38px;
  border: 0;
  color: var(--ink);
  background: transparent;
}

.history-controls button + button {
  border-left: 1px solid var(--faint);
}

.history-controls button:disabled {
  cursor: default;
  opacity: 0.3;
}

.timeline-status {
  position: absolute;
  z-index: 5;
  top: 78px;
  left: 18px;
  display: flex;
  gap: 10px;
  pointer-events: none;
  color: var(--muted);
  font-size: 0.68rem;
}

.timeline-status span + span::before {
  content: "·";
  margin-right: 10px;
}

.return-now {
  position: absolute;
  z-index: 10;
  right: 18px;
  top: 108px;
  border: 1px solid var(--faint);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--ink);
  background: var(--surface);
  box-shadow: 0 8px 24px var(--shadow);
}

.return-now[hidden],
.hover-time[hidden],
.event-preview[hidden] {
  display: none;
}

.hover-time {
  position: absolute;
  z-index: 15;
  transform: translate(-50%, -145%);
  border: 1px solid var(--faint);
  border-radius: 999px;
  padding: 6px 9px;
  pointer-events: none;
  color: var(--ink);
  background: var(--surface);
  box-shadow: 0 8px 22px var(--shadow);
  font-size: 0.7rem;
  white-space: nowrap;
}

.event-preview {
  position: absolute;
  z-index: 16;
  width: min(340px, calc(100% - 24px));
  border: 1px solid var(--faint);
  border-radius: 16px;
  padding: 15px;
  color: var(--ink);
  background: var(--surface);
  box-shadow: 0 18px 60px var(--shadow);
  backdrop-filter: blur(20px);
  pointer-events: auto;
}

.event-preview-close {
  position: absolute;
  top: 8px;
  right: 9px;
  border: 0;
  color: var(--muted);
  background: transparent;
  font-size: 1.1rem;
  pointer-events: auto;
}

.event-preview-type {
  margin: 0 0 5px;
  color: #ef6767;
  font-size: 0.64rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.event-preview h2 {
  margin: 0 0 8px;
  font-size: 0.95rem;
}

.event-preview-description {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.event-preview-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.event-preview-votes {
  display: flex;
  gap: 7px;
  margin-top: 12px;
}

.event-preview-votes button {
  border: 1px solid var(--faint);
  border-radius: 999px;
  padding: 6px 10px;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-size: 0.72rem;
}

.event-preview-votes button:hover,
.event-preview-votes button.is-selected {
  border-color: #55c47e;
  color: var(--ink);
  background: color-mix(in srgb, #55c47e 12%, transparent);
}

.event-preview-votes button:disabled {
  opacity: 0.55;
}

.event-preview-links a {
  border: 1px solid var(--faint);
  border-radius: 999px;
  padding: 6px 9px;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.7rem;
  pointer-events: auto;
}

.event-preview-links a:hover {
  border-color: #55c47e;
}

.topbar-button {
  flex: 0 0 auto;
  border-color: var(--faint);
  padding: 0 15px;
  color: var(--ink);
}

.topbar-link {
  flex: 0 0 auto;
  padding: 12px 16px;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.88rem;
  line-height: 20px;
}

.topbar-link-projects {
  position: fixed;
  z-index: 20;
  top: 18px;
  right: 18px;
}

.topbar-button:hover,
.topbar-button[aria-expanded="true"],
.topbar-link:hover {
  background: var(--surface-hover);
}

.topbar-button-accent {
  border-color: #3fa568;
  color: #07170d;
  background: #55c47e;
  font-weight: 700;
}

.topbar-button-accent:hover,
.topbar-button-accent[aria-expanded="true"] {
  background: #6ed594;
}

.search-form {
  flex: 1;
  min-width: 100px;
  display: flex;
  overflow: hidden;
}

.search-form input {
  flex: 1;
  min-width: 0;
  height: 44px;
  border: 0;
  outline: 0;
  padding: 0 14px;
  color: var(--ink);
  background: transparent;
}

.search-form input::placeholder {
  color: var(--muted);
}

.search-form button {
  flex: 0 0 auto;
  border: 0;
  border-left: 1px solid rgba(255, 255, 255, 0.14);
  padding: 0 16px;
  color: #fff;
  background: #2878e3;
  font-weight: 700;
}

.search-form button:hover {
  background: #3688f4;
}

.search-form button:focus-visible {
  outline: 2px solid #77aeff;
  outline-offset: -3px;
}

.timeline-viewport {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.timeline-viewport.is-dragging {
  cursor: grabbing;
}

.timeline-viewport.is-interactive {
  cursor: pointer;
}

.space-ambience {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  overflow: hidden;
  opacity: 0.96;
}

.space-nebula,
.starfield {
  position: absolute;
  inset: -12%;
}

.space-nebula {
  background:
    radial-gradient(circle at 18% 22%, rgba(72, 109, 210, 0.28), transparent 28%),
    radial-gradient(circle at 76% 18%, rgba(124, 74, 186, 0.22), transparent 24%),
    radial-gradient(circle at 64% 78%, rgba(40, 133, 117, 0.18), transparent 26%),
    radial-gradient(circle at 30% 70%, rgba(255, 126, 72, 0.14), transparent 20%);
  filter: blur(24px) saturate(118%);
  animation: nebula-drift 40s ease-in-out infinite alternate;
}

.starfield {
  mix-blend-mode: screen;
}

.starfield-far {
  opacity: 0.3;
  animation: star-drift-far 70s linear infinite;
}

.starfield-near {
  opacity: 0.44;
  animation: star-drift-near 45s linear infinite;
}

.starfield::before,
.starfield::after {
  content: "";
  position: absolute;
  inset: 0;
}

.starfield-far::before {
  width: 1px;
  height: 1px;
  top: 0;
  left: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.72);
  box-shadow:
    3vw 8vh 0 0 rgba(255,255,255,0.6),
    11vw 18vh 0 0 rgba(180,210,255,0.45),
    19vw 9vh 0 0 rgba(255,255,255,0.55),
    27vw 24vh 0 0 rgba(255,255,255,0.52),
    34vw 14vh 0 0 rgba(180,210,255,0.42),
    42vw 30vh 0 0 rgba(255,255,255,0.5),
    49vw 12vh 0 0 rgba(255,255,255,0.58),
    56vw 22vh 0 0 rgba(180,210,255,0.46),
    63vw 7vh 0 0 rgba(255,255,255,0.54),
    71vw 28vh 0 0 rgba(255,255,255,0.48),
    78vw 16vh 0 0 rgba(180,210,255,0.43),
    86vw 10vh 0 0 rgba(255,255,255,0.56),
    92vw 26vh 0 0 rgba(255,255,255,0.46),
    8vw 40vh 0 0 rgba(255,255,255,0.52),
    16vw 52vh 0 0 rgba(180,210,255,0.45),
    24vw 36vh 0 0 rgba(255,255,255,0.57),
    31vw 48vh 0 0 rgba(255,255,255,0.49),
    39vw 58vh 0 0 rgba(180,210,255,0.44),
    46vw 44vh 0 0 rgba(255,255,255,0.55),
    53vw 54vh 0 0 rgba(255,255,255,0.47),
    61vw 38vh 0 0 rgba(180,210,255,0.43),
    69vw 60vh 0 0 rgba(255,255,255,0.53),
    77vw 42vh 0 0 rgba(255,255,255,0.48),
    84vw 56vh 0 0 rgba(180,210,255,0.45),
    91vw 34vh 0 0 rgba(255,255,255,0.57),
    6vw 72vh 0 0 rgba(255,255,255,0.5),
    14vw 84vh 0 0 rgba(180,210,255,0.42),
    22vw 68vh 0 0 rgba(255,255,255,0.56),
    29vw 80vh 0 0 rgba(255,255,255,0.47),
    37vw 90vh 0 0 rgba(180,210,255,0.44),
    45vw 74vh 0 0 rgba(255,255,255,0.55),
    52vw 86vh 0 0 rgba(255,255,255,0.46),
    60vw 70vh 0 0 rgba(180,210,255,0.42),
    68vw 92vh 0 0 rgba(255,255,255,0.53),
    75vw 76vh 0 0 rgba(255,255,255,0.47),
    83vw 88vh 0 0 rgba(180,210,255,0.43),
    90vw 66vh 0 0 rgba(255,255,255,0.56);
}

.starfield-far::after {
  width: 1px;
  height: 1px;
  top: 6vh;
  left: 4vw;
  border-radius: 50%;
  background: rgba(200, 226, 255, 0.5);
  box-shadow:
    7vw 12vh 0 0 rgba(255,255,255,0.4),
    21vw 20vh 0 0 rgba(200,226,255,0.36),
    33vw 8vh 0 0 rgba(255,255,255,0.38),
    47vw 18vh 0 0 rgba(200,226,255,0.34),
    58vw 6vh 0 0 rgba(255,255,255,0.36),
    73vw 22vh 0 0 rgba(200,226,255,0.35),
    88vw 14vh 0 0 rgba(255,255,255,0.38),
    12vw 46vh 0 0 rgba(200,226,255,0.33),
    28vw 38vh 0 0 rgba(255,255,255,0.37),
    43vw 50vh 0 0 rgba(200,226,255,0.34),
    57vw 40vh 0 0 rgba(255,255,255,0.39),
    74vw 56vh 0 0 rgba(200,226,255,0.33),
    87vw 44vh 0 0 rgba(255,255,255,0.36),
    18vw 78vh 0 0 rgba(200,226,255,0.34),
    32vw 70vh 0 0 rgba(255,255,255,0.39),
    48vw 82vh 0 0 rgba(200,226,255,0.33),
    64vw 72vh 0 0 rgba(255,255,255,0.37),
    79vw 88vh 0 0 rgba(200,226,255,0.35);
}

.starfield-near::before {
  width: 2px;
  height: 2px;
  top: 0;
  left: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  box-shadow:
    5vw 10vh 0 0 rgba(255,255,255,0.8),
    15vw 28vh 0 0 rgba(173,220,255,0.64),
    26vw 16vh 0 0 rgba(255,244,220,0.58),
    38vw 32vh 0 0 rgba(255,255,255,0.78),
    50vw 14vh 0 0 rgba(173,220,255,0.6),
    62vw 26vh 0 0 rgba(255,255,255,0.76),
    74vw 12vh 0 0 rgba(255,244,220,0.56),
    85vw 30vh 0 0 rgba(255,255,255,0.78),
    10vw 48vh 0 0 rgba(173,220,255,0.58),
    22vw 60vh 0 0 rgba(255,255,255,0.8),
    35vw 44vh 0 0 rgba(255,244,220,0.56),
    47vw 58vh 0 0 rgba(255,255,255,0.77),
    59vw 42vh 0 0 rgba(173,220,255,0.58),
    71vw 62vh 0 0 rgba(255,255,255,0.8),
    83vw 46vh 0 0 rgba(255,244,220,0.56),
    13vw 82vh 0 0 rgba(255,255,255,0.78),
    28vw 72vh 0 0 rgba(173,220,255,0.6),
    41vw 88vh 0 0 rgba(255,255,255,0.77),
    58vw 76vh 0 0 rgba(255,244,220,0.56),
    73vw 90vh 0 0 rgba(255,255,255,0.8),
    88vw 74vh 0 0 rgba(173,220,255,0.58);
}

.starfield-near::after {
  width: 3px;
  height: 3px;
  top: 4vh;
  left: 8vw;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  animation: star-drift-highlight 32s linear infinite;
  box-shadow:
    18vw 20vh 0 0 rgba(255,255,255,0.42),
    44vw 12vh 0 0 rgba(173,220,255,0.34),
    67vw 24vh 0 0 rgba(255,244,220,0.32),
    82vw 54vh 0 0 rgba(255,255,255,0.38),
    36vw 68vh 0 0 rgba(173,220,255,0.3),
    61vw 82vh 0 0 rgba(255,255,255,0.36);
}

#timeline-canvas {
  display: block;
  width: 100%;
  height: 100%;
  position: relative;
  z-index: 2;
}

.floating-panel {
  position: fixed;
  z-index: 30;
  top: 70px;
  padding: 8px;
}

.floating-panel[hidden] {
  display: none;
}

.menu-panel {
  left: 18px;
  width: 210px;
}

.filter-panel {
  left: min(500px, calc(100% - 278px));
  width: 260px;
  max-height: calc(100vh - 90px);
  overflow: auto;
}

.floating-panel button,
.floating-panel a {
  display: block;
  width: 100%;
  border: 0;
  border-radius: 5px;
  padding: 10px;
  color: var(--ink);
  background: transparent;
  text-align: left;
  text-decoration: none;
  font-size: 0.82rem;
}

.floating-panel button:hover,
.floating-panel a:hover {
  background: var(--surface-hover);
}

.panel-divider {
  height: 1px;
  margin: 6px 4px;
  background: var(--faint);
}

.filter-group {
  padding: 8px 4px 12px;
  border-bottom: 1px solid var(--faint);
}

.year-range-filter {
  padding: 8px 4px 12px;
  border-bottom: 1px solid var(--faint);
}

.year-range-filter > label {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.year-range-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.year-range-fields input,
.year-range-filter select {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--faint);
  border-radius: 5px;
  padding: 8px;
  color: var(--ink);
  background: var(--bg);
}

.year-range-filter select {
  margin-top: 7px;
}

.filter-group > label {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.check-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  color: var(--ink);
  font-size: 0.75rem;
}

.check-row input {
  accent-color: var(--strong);
}

.major-filter {
  font-weight: 700;
}

.filter-group select {
  width: 100%;
  border: 1px solid var(--faint);
  border-radius: 5px;
  padding: 8px;
  color: var(--ink);
  background: var(--bg);
}

.filter-group input,
.filter-group small {
  width: 100%;
}

.filter-group input {
  border: 1px solid var(--faint);
  border-radius: 5px;
  padding: 8px;
  color: var(--ink);
  background: var(--bg);
}

.tag-suggestion-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.tag-suggestion-list[hidden] {
  display: none;
}

.tag-suggestion {
  border: 1px solid color-mix(in srgb, var(--strong), transparent 45%);
  border-radius: 999px;
  padding: 5px 9px;
  color: var(--ink);
  background: color-mix(in srgb, var(--strong), transparent 84%);
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 700;
}

.tag-suggestion:hover,
.tag-suggestion:focus-visible {
  background: color-mix(in srgb, var(--strong), transparent 68%);
}

.tag-suggestion-empty {
  color: var(--muted);
  font-size: 0.7rem;
}

.filter-group small,
.field-hint {
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.45;
}

.panel-reset {
  margin-top: 6px;
  color: var(--muted) !important;
}

.zoom-controls {
  position: absolute;
  z-index: 10;
  right: 18px;
  bottom: 18px;
  overflow: hidden;
}

.zoom-controls button {
  display: block;
  width: 42px;
  height: 38px;
  border: 0;
  color: var(--ink);
  background: transparent;
  font-size: 1.2rem;
}

.zoom-controls button + button {
  border-top: 1px solid var(--faint);
}

.zoom-controls button:hover {
  background: var(--surface-hover);
}

.live-clock,
.interaction-hint,
.loading-state {
  position: absolute;
  z-index: 5;
  pointer-events: none;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}

.live-clock {
  right: 18px;
  top: 78px;
  font-variant-numeric: tabular-nums;
}

.interaction-hint {
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0.7;
}

.loading-state {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.add-event-dialog {
  width: min(460px, calc(100% - 28px));
  border: 1px solid var(--faint);
  border-radius: 10px;
  padding: 0;
  color: var(--ink);
  background: var(--surface);
  box-shadow: 0 20px 80px var(--shadow);
}

.add-event-dialog::backdrop {
  background: rgba(0, 0, 0, 0.68);
  backdrop-filter: blur(4px);
}

.add-event-dialog form {
  display: grid;
  gap: 16px;
  padding: 20px;
  max-height: min(86vh, 760px);
  overflow: auto;
}

.dialog-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.dialog-heading h2 {
  margin: 0;
  font-size: 1rem;
}

.dialog-heading button {
  border: 0;
  color: var(--muted);
  background: transparent;
  font-size: 1.5rem;
}

.add-event-dialog label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.74rem;
}

.date-fieldset {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 12px;
  border: 1px solid var(--faint);
  border-radius: 8px;
}

.date-fieldset legend {
  padding: 0 6px;
  color: var(--muted);
  font-size: 0.74rem;
}

.date-entry-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 12px 10px;
}

.add-event-dialog input,
.add-event-dialog select,
.add-event-dialog textarea {
  width: 100%;
  border: 1px solid var(--faint);
  border-radius: 6px;
  padding: 10px;
  color: var(--ink);
  background: var(--bg);
  resize: vertical;
}

.submit-event-button {
  border: 1px solid #3fa568;
  border-radius: 6px;
  padding: 11px;
  color: #07170d;
  background: #55c47e;
  font-weight: 700;
}

.submit-event-button:disabled {
  opacity: 0.7;
  cursor: wait;
}

body[data-theme="light"] .space-ambience {
  opacity: 0.18;
}

body[data-theme="light"] .space-nebula {
  filter: blur(24px) saturate(70%);
}

@keyframes star-drift-far {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-120px, 72px, 0) scale(1.05); }
}

@keyframes star-drift-near {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-260px, 170px, 0) scale(1.11); }
}

@keyframes star-drift-highlight {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-340px, 220px, 0) scale(1.14); }
}

@keyframes nebula-drift {
  from { transform: scale(1) translate3d(0, 0, 0); }
  to { transform: scale(1.1) translate3d(-3%, 2%, 0); }
}

@media (max-width: 620px) {
  .topbar {
    top: 10px;
    left: 10px;
    width: calc(100% - 20px);
    flex-wrap: wrap;
  }

  .topbar-button {
    padding-inline: 11px;
  }

  .topbar-link-projects {
    top: 10px;
    right: 10px;
  }

  .search-form input {
    font-size: 0.82rem;
  }

  .menu-panel {
    top: 62px;
    left: 10px;
  }

  .filter-panel {
    top: 62px;
    right: 10px;
    left: auto;
    width: min(280px, calc(100% - 20px));
  }

  .interaction-hint {
    display: none;
  }

  .timeline-status {
    top: 64px;
    max-width: calc(100% - 20px);
  }

  .live-clock {
    display: none;
  }

  .date-entry-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .space-ambience {
    opacity: 0.5;
  }
}