:root {
  --bg: #f4fbff;
  --panel: rgba(255, 255, 255, 0.94);
  --panel-soft: rgba(250, 253, 255, 0.88);
  --ink: #122033;
  --muted: #667a8f;
  --line: #d7e7f4;
  --accent: #3a86d1;
  --accent-dark: #245f9c;
  --accent-soft: #e3f2ff;
  --green: #2f7d68;
  --amber: #b9852d;
  --shadow: 0 18px 42px rgba(44, 99, 156, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scrollbar-gutter: stable;
  overflow-y: scroll;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(89, 168, 237, 0.16), transparent 28rem),
    radial-gradient(circle at left center, rgba(196, 232, 255, 0.45), transparent 24rem),
    linear-gradient(180deg, #fbfeff 0%, var(--bg) 100%);
}

a {
  color: inherit;
}

code {
  font-family: "SFMono-Regular", Menlo, monospace;
  font-size: 0.92em;
  background: rgba(18, 32, 51, 0.06);
  padding: 0.15rem 0.35rem;
  border-radius: 6px;
}

button,
select {
  font: inherit;
}

.site-header,
.site-footer,
.page-shell,
.flash-stack {
  width: min(1240px, calc(100vw - 40px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0 18px;
}

.brand-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand {
  font-size: 1.85rem;
  font-weight: 760;
  text-decoration: none;
  letter-spacing: -0.03em;
}

.tagline {
  color: var(--muted);
  font-size: 0.94rem;
}

.site-nav {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

.site-nav a {
  text-decoration: none;
  color: var(--muted);
}

.account-menu {
  position: relative;
}

.nav-pill,
.account-pill,
.primary-btn,
.secondary-btn,
.text-btn,
.secondary-chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  cursor: pointer;
  font: inherit;
  transition:
    background-color 180ms ease,
    color 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.nav-pill,
.account-pill,
.primary-btn {
  background: var(--accent);
  color: #fff;
  padding: 0.8rem 1.15rem;
  border-color: transparent;
}

.nav-pill:hover,
.account-pill:hover,
.primary-btn:hover {
  background: var(--accent-dark);
}

.account-pill {
  max-width: 260px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  list-style: none;
}

.account-menu summary::-webkit-details-marker {
  display: none;
}

.account-dropdown {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  min-width: 220px;
  display: grid;
  gap: 4px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 18px 34px rgba(44, 99, 156, 0.12);
  z-index: 40;
}

.account-dropdown a,
.account-dropdown button {
  border: 0;
  background: transparent;
  color: var(--ink);
  text-align: left;
  border-radius: 12px;
  padding: 10px 12px;
  text-decoration: none;
  cursor: pointer;
}

.account-dropdown a:hover,
.account-dropdown button:hover {
  background: rgba(227, 242, 255, 0.72);
}

.account-dropdown form {
  margin: 0;
}

.secondary-btn,
.secondary-chip {
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
  padding: 0.78rem 1.15rem;
}

.secondary-chip {
  padding: 0.55rem 0.9rem;
  font-size: 0.92rem;
}

.active-chip {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.text-btn {
  background: transparent;
  color: var(--accent-dark);
  padding: 0;
  border: 0;
  font-weight: 600;
}

.page-shell {
  padding-bottom: 72px;
}

.eyebrow,
.section-eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  font-weight: 700;
}

.page-head,
.hero-copy,
.title-row {
  display: grid;
  gap: 4px;
}

.page-head {
  justify-content: space-between;
  align-items: end;
  gap: 20px;
  margin: 12px 0 18px;
}

.analytics-head {
  padding-top: 4px;
}

.page-head h1,
.hero h1 {
  margin: 0;
  font-size: clamp(2.3rem, 4.6vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.page-head p,
.hero-copy p,
.muted,
.video-meta,
.video-description,
.section-note,
.summary-stack .meta,
.summary-three .line {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  padding: 22px 0 44px;
}

.lede {
  font-size: 1.1rem;
  line-height: 1.8;
  max-width: 720px;
}

.hero-actions,
.button-row,
.card-actions,
.compare-form,
.segmented {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.card,
.hero-card,
.hero-panel,
.info-card,
.account-card,
.video-card,
.table-card,
.detail-card,
.policy,
.controls-card,
.analytics-video-card {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero-card,
.hero-panel,
.info-card,
.account-card,
.video-card,
.table-card,
.detail-card,
.policy,
.controls-card,
.analytics-video-card {
  padding: 18px;
}

.hero-card {
  display: grid;
  gap: 16px;
}

.hero-layout {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
}

.detail-page-head {
  justify-content: start;
  margin-bottom: 8px;
}

.analytics-hero-layout {
  grid-template-columns: 72px minmax(0, 1fr) auto;
}

.detail-hero-layout {
  grid-template-columns: 72px minmax(0, 1fr) 180px;
}

.summary-stack {
  display: grid;
  gap: 4px;
}

.summary-stack h2,
.section-head h2,
.section-head h3,
.analytics-video-copy h3,
.analytics-video-copy h2 {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.28;
  font-weight: 760;
  letter-spacing: -0.03em;
}

.hash {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.24em;
}

.summary-side,
.summary-three {
  display: grid;
  gap: 8px;
  justify-items: end;
  text-align: right;
}

.summary-three .strong {
  font-size: 1rem;
  font-weight: 760;
  color: var(--green);
}

.flash-stack {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.flash {
  padding: 14px 18px;
  border-radius: 16px;
  border: 1px solid var(--line);
}

.flash-success {
  background: var(--accent-soft);
}

.flash-warning {
  background: #fff4db;
}

.flash-error {
  background: #ffe0d8;
}

.grid-section {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.controls-card {
  display: grid;
  gap: 12px;
  margin: 10px 0 18px;
}

.control-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
}

.table-head,
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 12px;
  margin-bottom: 14px;
}

.analytics-grid,
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.analytics-video-card,
.video-card {
  display: grid;
  gap: 14px;
}

.analytics-video-top {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.analytics-video-copy {
  display: grid;
  gap: 4px;
}

.analytics-video-body {
  gap: 12px;
}

.analytics-actions {
  justify-content: flex-start;
}

.detail-thumb,
.video-cover {
  width: 56px;
  aspect-ratio: 9 / 16;
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.24), transparent 35%),
    linear-gradient(135deg, #bfe3ff, #e9f7ff);
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.36);
}

.detail-thumb::after,
.video-cover::after {
  content: "TikTok";
  position: absolute;
  left: 7px;
  bottom: 7px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: rgba(18, 32, 51, 0.72);
  text-transform: uppercase;
}

.detail-thumb-large {
  width: 64px;
}

.video-cover {
  width: 100%;
  min-height: 200px;
  display: flex;
  align-items: end;
  padding: 18px;
}

.video-cover.large {
  min-height: 320px;
}

.video-label {
  display: inline-block;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.92);
  border-radius: 999px;
  font-size: 0.92rem;
}

.metric-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
}

.metric-list div,
.stat-box {
  background: rgba(227, 242, 255, 0.7);
  border: 1px solid rgba(58, 134, 209, 0.08);
  border-radius: 18px;
  padding: 12px 14px;
}

.metric-list.compact div {
  padding: 10px 12px;
}

.metric-list dt,
.stat-box span {
  color: var(--muted);
  margin-bottom: 6px;
  font-size: 0.82rem;
}

.metric-list dd,
.stat-box strong {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 760;
  color: var(--ink);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.detail-stack {
  display: grid;
  gap: 18px;
}

.detail-grid,
.compare-grid,
.analytics-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 18px;
}

.table-card,
.analytics-table-card {
  overflow: hidden;
}

.compare-form label {
  display: grid;
  gap: 8px;
  min-width: 220px;
}

select {
  padding: 0.78rem 0.9rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
}

.compare-table caption {
  caption-side: top;
  text-align: left;
  padding: 18px 18px 4px;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 760;
  letter-spacing: -0.02em;
}

.compare-table th,
.compare-table td {
  text-align: left;
  padding: 12px 10px;
  border-bottom: 1px solid rgba(58, 134, 209, 0.12);
  font-size: 0.92rem;
  vertical-align: middle;
}

.compare-table th {
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.section-card,
.timeline-card {
  padding: 18px;
}

.state-frame {
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.96);
}

.state-frame .stat-grid {
  gap: 0;
}

.state-frame .stat-box {
  border-radius: 0;
  border: 0;
  border-right: 1px solid var(--line);
  background: rgba(243, 249, 253, 0.92);
  position: relative;
}

.state-frame .stat-box:first-child {
  border-top-left-radius: 22px;
}

.state-frame .stat-box:last-child {
  border-top-right-radius: 22px;
  border-right: 0;
}

.state-frame .stat-box.active::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 4px;
  background: var(--accent);
  border-top-left-radius: 22px;
  border-top-right-radius: 22px;
}

.chart-card {
  background: rgba(250, 253, 255, 0.88);
  border-top: 1px solid var(--line);
  padding: 14px 16px 16px;
}

.chart-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 12px;
}

.chart-head h4 {
  margin: 0;
  font-size: 0.94rem;
}

.chart-head p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.chart-frame svg {
  width: 100%;
  height: 220px;
  display: block;
}

.chart-axis {
  stroke: #c9deef;
  stroke-width: 1.5;
}

.chart-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.chart-dot {
  fill: #fff;
  stroke: var(--accent);
  stroke-width: 2;
}

.chart-label {
  fill: var(--muted);
  font-size: 11px;
}

.timeline-list {
  display: grid;
  gap: 0;
  margin-top: 2px;
}

.timeline-row {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}

.timeline-row:first-child {
  border-top: 0;
}

.timeline-key {
  font-size: 0.92rem;
  font-weight: 700;
}

.timeline-main {
  display: grid;
  gap: 4px;
}

.timeline-main strong {
  font-size: 0.92rem;
  line-height: 1.4;
}

.timeline-main span {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.timeline-metrics {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.timeline-chip {
  border-radius: 999px;
  padding: 5px 9px;
  font-size: 0.72rem;
  font-weight: 650;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
}

.timeline-chip.strong {
  color: var(--green);
  background: rgba(45, 107, 74, 0.12);
}

.timeline-chip.normal {
  color: var(--muted);
  background: rgba(102, 122, 143, 0.1);
}

.table-video-cell {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.table-thumb {
  width: 44px;
  aspect-ratio: 9 / 16;
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.24), transparent 35%),
    linear-gradient(135deg, #bfe3ff, #e9f7ff);
  background-size: cover;
  background-position: center;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.36);
}

.table-video-copy {
  display: grid;
  gap: 2px;
}

.table-video-copy strong {
  font-size: 0.92rem;
  line-height: 1.35;
}

.table-video-copy span {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.3;
  word-break: break-all;
}

.table-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  padding: 24px 0 42px;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, #3a86d1, #95caef);
  color: #fff;
  font-weight: 760;
}

.avatar-lg {
  width: 64px;
  height: 64px;
  font-size: 1.2rem;
}

.analytics-avatar {
  box-shadow: 0 10px 22px rgba(58, 134, 209, 0.22);
}

@media (max-width: 900px) {
  .hero,
  .grid-section,
  .detail-grid,
  .compare-grid,
  .analytics-detail-grid,
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .site-header,
  .page-head,
  .site-footer,
  .hero-layout,
  .control-row {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .metric-list {
    grid-template-columns: 1fr;
  }

  .summary-side,
  .summary-three {
    justify-items: start;
    text-align: left;
  }

  .timeline-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .timeline-metrics {
    justify-content: flex-start;
  }
}