:root {
  --page-bg: #121212;
  --page-bg-deep: #0b0b0c;
  --paper: rgba(27, 27, 28, 0.98);
  --paper-strong: rgba(32, 32, 33, 0.98);
  --ink: #f2f2ee;
  --muted: #96918a;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --accent: #ef5a3c;
  --accent-deep: #cf482d;
  --overlay: rgba(6, 6, 6, 0.56);
  --shadow-card: 0 18px 38px rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "PingFang SC", "Helvetica Neue", "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  background-color: var(--page-bg-deep);
  background-image:
    linear-gradient(180deg, #151515 0%, #111112 58%, #0b0b0c 100%);
  background-repeat: no-repeat;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

.hidden {
  display: none !important;
}

.page-shell {
  max-width: 920px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 20px 18px 64px;
  display: flex;
  flex-direction: column;
}

.page-main {
  flex: 1;
  min-height: 0;
  display: grid;
  align-content: center;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  padding: 6px 0 16px;
  border-bottom: 1px solid var(--line);
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand {
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0;
}

.mode-pill,
.time-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(239, 90, 60, 0.14);
  color: var(--muted);
  font-size: 12px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.library-note {
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.text-button,
.text-link,
.inline-button {
  border: 0;
  background: none;
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
}

.text-button,
.inline-button,
.text-link {
  padding: 0;
  font-size: 14px;
}

.text-button:hover,
.text-link:hover,
.inline-button:hover {
  color: var(--ink);
  text-decoration: underline;
}

.offline-notice {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 28px;
  padding: 16px 18px;
  border: 1px solid rgba(245, 196, 0, 0.18);
  border-radius: 16px;
  background: rgba(37, 31, 10, 0.92);
  box-shadow: var(--shadow-card);
}

.offline-copy p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.hero {
  padding: 26px 0 20px;
  text-align: center;
}

.hero-kicker,
.sheet-kicker {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-title,
.result-copy h3,
.sheet-head h2 {
  margin: 0;
  font-weight: 700;
}

.hero-title {
  font-size: clamp(30px, 4vw, 40px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 560px;
  margin: 0 auto;
}

.hero-subtitle {
  max-width: 420px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.search-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  max-width: 760px;
  margin: 12px auto 0;
}

.search-box {
  position: relative;
  display: block;
}

.search-box input,
.viewer-key-form input {
  width: 100%;
  min-height: 50px;
  padding: 0 58px 0 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper-strong);
  color: var(--ink);
  box-shadow: none;
}

.search-box input:focus,
.viewer-key-form input:focus {
  outline: none;
  border-color: rgba(239, 90, 60, 0.35);
  box-shadow: 0 0 0 3px rgba(239, 90, 60, 0.18);
}

.search-box input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  cursor: pointer;
  background-color: var(--accent);
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='black' d='M3.53 2.47 8 6.94l4.47-4.47 1.06 1.06L9.06 8l4.47 4.47-1.06 1.06L8 9.06l-4.47 4.47-1.06-1.06L6.94 8 2.47 3.53z'/%3E%3C/svg%3E");
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;
  opacity: 0.88;
}

.search-button,
.mini-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 12px;
  cursor: pointer;
}

.search-button {
  border: 2px solid var(--accent);
  background: transparent;
  color: var(--accent);
  min-width: 92px;
  box-shadow: none;
  font-weight: 700;
}

.search-button:hover {
  background: rgba(239, 90, 60, 0.08);
}

.search-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  box-shadow: none;
}

.mini-button {
  border: 1px solid var(--line);
  background: var(--paper-strong);
  color: var(--ink);
}

.filter-trigger {
  position: absolute;
  top: 50%;
  right: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin: 0;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  line-height: 0;
  transform: translateY(-50%);
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease, color 140ms ease;
}

.filter-trigger:hover,
.filter-trigger.is-open {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--ink);
}

.filter-trigger.has-selection {
  border-color: rgba(239, 90, 60, 0.36);
  background: rgba(239, 90, 60, 0.14);
  color: var(--accent);
}

.filter-bars {
  display: flex;
  width: 16px;
  height: 14px;
  flex-direction: column;
  justify-content: space-between;
  align-items: stretch;
}

.filter-bars span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 999px;
  background: currentColor;
}

.filter-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 12;
  width: min(340px, 100%);
  padding: 14px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: rgba(20, 20, 21, 0.98);
  box-shadow: 0 18px 38px rgba(0, 0, 0, 0.28);
}

.filter-dropdown-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.filter-dropdown-kicker {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 12px;
}

.filter-dropdown-head strong {
  font-size: 16px;
}

.search-toolbar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.scope-switch {
  display: grid;
  grid-template-columns: repeat(3, minmax(88px, 1fr));
  gap: 10px;
  width: min(420px, 100%);
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.scope-chip {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.02);
  color: var(--muted);
  padding: 11px 16px;
  border-radius: 12px;
  cursor: pointer;
  position: relative;
  font-weight: 600;
  text-align: center;
  min-height: 46px;
}

.scope-chip.is-active {
  border: 2px solid var(--accent);
  background: rgba(239, 90, 60, 0.1);
  color: var(--ink);
  font-weight: 700;
}

.active-filters,
.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.active-filter-chip {
  border: 1px solid var(--line);
  background: var(--paper-strong);
  color: var(--muted);
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13px;
}

.active-filters {
  justify-content: center;
  margin-top: 18px;
}

.active-filter-label {
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
}

.results-section {
  padding-top: 10px;
}

.results-head {
  margin-bottom: 14px;
  display: grid;
  gap: 6px;
  justify-items: center;
  text-align: center;
}

.results-title {
  margin: 0;
  font-size: 20px;
  line-height: 1.2;
}

.results-status {
  min-height: 24px;
  color: var(--muted);
  font-size: 14px;
}

.empty-state {
  padding: 24px 0 8px;
  color: var(--muted);
  text-align: center;
  line-height: 1.8;
}

.results-list {
  display: grid;
  gap: 12px;
}

.result-card {
  border: 1px solid transparent;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.02);
  box-shadow: none;
  overflow: hidden;
  transition: border-color 160ms ease, background 160ms ease;
}

.result-card:hover {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.result-summary {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 14px;
  padding: 14px 12px;
}

.result-cover,
.detail-cover {
  display: block;
  width: 100%;
  object-fit: cover;
  background: rgba(255, 255, 255, 0.04);
}

.result-cover {
  aspect-ratio: 1 / 1;
  border-radius: 10px;
}

.result-cover.is-fallback,
.detail-cover.is-fallback {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(245, 196, 0, 0.12));
}

.result-copy {
  min-width: 0;
}

.result-copy.is-timeline {
  display: grid;
  align-content: start;
}

.result-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0;
  text-transform: none;
}

.result-copy h3 {
  margin-top: 4px;
  font-size: 20px;
  line-height: 1.3;
}

.result-meta,
.result-summary-text,
.result-excerpt,
.detail-section p,
.viewer-status-card p {
  margin: 0;
  line-height: 1.75;
}

.result-meta {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.result-summary-text {
  margin-top: 8px;
  font-size: 14px;
  color: var(--accent);
}

.result-summary-text.is-semantic-hit {
  display: inline-flex;
  align-items: center;
  max-width: fit-content;
  padding: 4px 8px;
  border-radius: 8px;
  background: rgba(239, 90, 60, 0.16);
  border: 1px solid rgba(239, 90, 60, 0.24);
}

.timeline-feature {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.timeline-feature-image {
  display: block;
  width: 100%;
  max-width: 520px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.timeline-feature-title {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  font-weight: 700;
}

.result-excerpt {
  margin-top: 8px;
  color: var(--ink);
  font-size: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.result-context-panel {
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
}

.context-block + .context-block {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.context-label {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.context-list {
  display: grid;
  gap: 10px;
}

.context-item {
  display: grid;
  gap: 4px;
}

.context-time {
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
}

.context-text {
  margin: 0;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.8;
}

.result-actions {
  margin-top: 10px;
}

.result-actions .inline-button {
  color: var(--accent);
  font-weight: 700;
}

.sheet {
  position: fixed;
  inset: 0;
  z-index: 30;
}

.sheet-backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  width: 100%;
  background: var(--overlay);
  cursor: pointer;
}

.sheet-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(420px, 100vw);
  height: 100vh;
  padding: 24px 22px 28px;
  border-left: 1px solid var(--line-strong);
  background: rgba(20, 20, 21, 0.98);
  box-shadow: -18px 0 48px rgba(0, 0, 0, 0.28);
  overflow-y: auto;
}

.sheet-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 16px;
}

.sheet-head h2 {
  font-size: 30px;
  line-height: 1.08;
}

.sheet-close {
  border: 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
}

.sheet-content {
  margin-top: 22px;
}

.sheet-block {
  display: grid;
  gap: 16px;
}

.filter-summary {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.filter-summary p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.participant-list {
  display: grid;
  gap: 10px;
}

.participant-search-field input {
  width: 100%;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper-strong);
  color: var(--ink);
}

.participant-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
}

.participant-item.is-selected {
  border-color: rgba(245, 196, 0, 0.28);
  background: rgba(239, 90, 60, 0.12);
}

.participant-main {
  display: flex;
  align-items: center;
  gap: 10px;
}

.participant-main input {
  margin: 0;
  inline-size: 16px;
  block-size: 16px;
  flex: 0 0 16px;
  accent-color: var(--accent);
}

.participant-count {
  color: var(--muted);
  font-size: 13px;
}

.participant-empty {
  padding: 14px 4px 4px;
  color: var(--muted);
  font-size: 14px;
}

.meta-list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.about-note-card {
  padding: 16px 18px;
  border: 1px solid rgba(239, 90, 60, 0.18);
  border-radius: 14px;
  background: rgba(239, 90, 60, 0.08);
}

.about-note-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 15px;
}

.about-note-card p {
  margin: 0;
  color: var(--ink);
  line-height: 1.8;
  font-size: 14px;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.meta-row dt,
.meta-row dd {
  margin: 0;
}

.meta-row dt {
  color: var(--muted);
}

.meta-row dd {
  text-align: right;
}

.viewer-status-card {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
}

.viewer-key-form {
  display: grid;
  gap: 12px;
}

.field-label {
  font-size: 14px;
  color: var(--muted);
}

.check-row {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.sheet-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

mark {
  background: rgba(239, 90, 60, 0.22);
  color: inherit;
  padding: 0 3px;
  border-radius: 4px;
  font-weight: 700;
  box-shadow: inset 0 -1px 0 rgba(239, 90, 60, 0.42);
}

@media (max-width: 820px) {
  .page-shell {
    min-height: auto;
    padding: 20px 16px 56px;
    display: block;
  }

  .page-main {
    display: block;
  }

  .topbar {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding: 4px 0 14px;
  }

  .brand-row {
    gap: 8px;
  }

  .brand {
    font-size: 14px;
    white-space: nowrap;
  }

  .mode-pill,
  .time-pill {
    min-height: 24px;
    padding: 0 8px;
    font-size: 11px;
  }

  .topbar-actions {
    min-width: 0;
    flex: 1;
    justify-content: flex-end;
    gap: 10px;
  }

  .library-note {
    min-width: 0;
    max-width: 46vw;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 11px;
  }

  .text-button {
    flex: 0 0 auto;
    white-space: nowrap;
    font-size: 13px;
  }

  .hero {
    padding: 20px 0 18px;
    text-align: left;
  }

  .hero-kicker {
    margin: 0 0 10px;
  }

  .hero-title {
    margin: 0;
  }

  .search-form {
    grid-template-columns: 1fr;
  }

  .search-button {
    width: 100%;
  }

  .filter-dropdown {
    width: 100%;
  }

  .search-toolbar,
  .active-filters {
    justify-content: flex-start;
  }

  .scope-switch {
    width: 100%;
  }

  .result-summary {
    grid-template-columns: 76px 1fr;
    padding: 12px 0;
  }

  .result-copy h3 {
    font-size: 17px;
  }

  .timeline-feature-image {
    max-width: 100%;
  }

  .sheet-panel {
    top: auto;
    right: 0;
    bottom: 0;
    width: 100%;
    height: auto;
    max-height: 82vh;
    border-left: 0;
    border-top: 1px solid var(--line-strong);
    border-radius: 24px 24px 0 0;
  }

  .filter-summary,
  .meta-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .meta-row dd {
    text-align: left;
  }
}