:root {
  --spec-paper: #f6f5f0;
  --spec-surface: #fbfaf6;
  --spec-ink: #183044;
  --spec-muted: #65727c;
  --spec-line: #d9dfe1;
  --spec-blue: #315fd4;
  --spec-night: #081020;
  --spec-panel: #00093a;
  --spec-label: #a8cbff;
  --spec-table: #cddfff;
  --spec-primary: #4794ff;
  --spec-info: #04a3ff;
  --spec-success: #36ff7d;
  --spec-danger: #ff5656;
  --spec-modal-line: #7eb0ff;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--spec-ink);
  background: var(--spec-paper);
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
}

* {
  box-sizing: border-box;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.spec-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(217, 223, 225, 0.86);
  background: rgba(246, 245, 240, 0.9);
  backdrop-filter: blur(18px);
}

.spec-nav,
.spec-container {
  width: min(960px, calc(100% - 48px));
  margin: 0 auto;
}

.spec-nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.spec-brand {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.spec-brand b,
.spec-kicker,
.spec-code {
  color: var(--spec-blue);
  font-family: Inter, sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.spec-brand span {
  font-family: "Noto Serif SC", serif;
  font-size: 18px;
}

.spec-links {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--spec-line);
  border-radius: 999px;
  background: rgba(251, 250, 246, 0.92);
}

.spec-links a,
.spec-back {
  padding: 9px 13px;
  border-radius: 999px;
  color: #4e5e6a;
  font-size: 13px;
}

.spec-links a:hover,
.spec-links a:focus-visible,
.spec-back:hover,
.spec-back:focus-visible {
  color: #fff;
  background: var(--spec-ink);
  outline: none;
}

.spec-section {
  padding: 104px 0;
  border-bottom: 1px solid var(--spec-line);
}

.spec-section--soft {
  background: var(--spec-surface);
}

.spec-section--night {
  color: #eef6ff;
  border-color: rgba(126, 176, 255, 0.18);
  background: var(--spec-night);
}

.spec-hero {
  padding-top: 112px;
}

.spec-topline {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--spec-line);
  color: var(--spec-muted);
  font-family: Inter, sans-serif;
  font-size: 11px;
  letter-spacing: 0.08em;
}

.spec-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(260px, 0.7fr);
  gap: 64px;
  align-items: end;
  padding: 64px 0 48px;
}

.spec-hero h1,
.spec-heading h2 {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-weight: 500;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.spec-hero h1 {
  max-width: 820px;
  font-size: clamp(54px, 7vw, 92px);
  line-height: 1.08;
}

.spec-lead {
  max-width: 760px;
  margin: 28px 0 0;
  color: #50616d;
  font-size: 18px;
  line-height: 1.9;
}

.spec-proof {
  padding: 28px 0 6px 28px;
  border-left: 1px solid var(--spec-line);
}

.spec-proof span {
  color: var(--spec-muted);
  font-size: 12px;
}

.spec-proof strong {
  display: block;
  margin-top: 10px;
  font-family: "Noto Serif SC", serif;
  font-size: 25px;
  font-weight: 500;
  line-height: 1.55;
}

.spec-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 48px;
}

.spec-fact {
  min-height: 138px;
  padding: 24px;
  border: 1px solid var(--spec-line);
  border-radius: 16px;
  background: var(--spec-surface);
}

.spec-fact strong,
.spec-fact span {
  display: block;
}

.spec-fact strong {
  font-family: "Noto Serif SC", serif;
  font-size: 27px;
  font-weight: 500;
}

.spec-fact span {
  margin-top: 12px;
  color: var(--spec-muted);
  font-size: 13px;
}

.dashboard-proof {
  overflow: hidden;
  margin: 0;
  padding: 34px;
  border-radius: 22px;
  background: var(--spec-night);
}

.dashboard-proof img {
  width: 100%;
  border: 1px solid rgba(126, 176, 255, 0.42);
  border-radius: 12px;
}

.spec-caption,
.spec-source-note {
  color: var(--spec-muted);
  font-size: 12px;
  line-height: 1.75;
}

.spec-caption {
  margin: 14px 0 0;
}

.spec-heading {
  max-width: 820px;
  margin-bottom: 44px;
}

.spec-heading h2 {
  margin-top: 18px;
  font-size: clamp(42px, 5.2vw, 68px);
  line-height: 1.18;
}

.spec-heading p {
  margin: 22px 0 0;
  color: var(--spec-muted);
  font-size: 16px;
  line-height: 1.9;
}

.spec-section--night .spec-heading p,
.spec-section--night .spec-caption {
  color: rgba(224, 235, 247, 0.7);
}

.token-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.token-card {
  overflow: hidden;
  border: 1px solid rgba(126, 176, 255, 0.2);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.035);
}

.token-swatch {
  height: 116px;
  background: var(--swatch);
}

.token-info {
  padding: 18px;
}

.token-info strong,
.token-info span,
.token-info code {
  display: block;
}

.token-info strong {
  font-size: 14px;
}

.token-info code {
  margin-top: 7px;
  color: var(--spec-label);
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
}

.token-info span {
  margin-top: 12px;
  color: rgba(224, 235, 247, 0.62);
  font-size: 12px;
  line-height: 1.55;
}

.type-table,
.measure-table {
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--spec-line);
  border-radius: 16px;
  background: var(--spec-surface);
}

.type-row,
.measure-row {
  display: grid;
  gap: 20px;
  align-items: center;
  min-height: 82px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--spec-line);
}

.type-row {
  grid-template-columns: minmax(220px, 1.1fr) 1fr 100px 1.2fr;
}

.measure-row {
  grid-template-columns: minmax(210px, 1fr) repeat(3, 0.7fr);
}

.type-row:last-child,
.measure-row:last-child {
  border-bottom: 0;
}

.type-row--head,
.measure-row--head {
  min-height: 50px;
  color: var(--spec-muted);
  font-family: Inter, sans-serif;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.type-sample--title {
  font-family: "Noto Serif SC", serif;
  font-size: 26px;
}

.type-sample--action {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.type-sample--value {
  font-size: 16px;
}

.type-sample--label {
  color: #6885a0;
  font-size: 14px;
}

.layout-stage {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(126, 176, 255, 0.24);
  border-radius: 18px;
  background: #020817;
}

.layout-stage img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.layout-zone {
  position: absolute;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed rgba(126, 176, 255, 0.72);
  color: #d6e5ff;
  background: rgba(4, 36, 78, 0.48);
  font-family: Inter, sans-serif;
  font-size: 11px;
  letter-spacing: 0.08em;
}

.layout-zone--left {
  inset: 18% auto 8% 2%;
  width: 22%;
}

.layout-zone--center {
  inset: 18% 24% 8%;
}

.layout-zone--right {
  inset: 18% 2% 8% auto;
  width: 22%;
}

.measure-table {
  margin-top: 28px;
  color: #e8f1ff;
  border-color: rgba(126, 176, 255, 0.2);
  background: rgba(255, 255, 255, 0.035);
}

.measure-row {
  border-color: rgba(126, 176, 255, 0.17);
}

.measure-row span:not(:first-child) {
  color: var(--spec-label);
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
}

.component-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.component-card {
  min-height: 288px;
  padding: 26px;
  border: 1px solid var(--spec-line);
  border-radius: 16px;
  background: var(--spec-surface);
}

.component-card h3 {
  margin: 18px 0 8px;
  font-family: "Noto Serif SC", serif;
  font-size: 24px;
  font-weight: 500;
}

.component-card p {
  margin: 0;
  color: var(--spec-muted);
  font-size: 13px;
  line-height: 1.7;
}

.component-specimen {
  min-height: 116px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 16px;
  border-radius: 12px;
  background: var(--spec-night);
}

.component-specimen img {
  max-width: min(100%, 220px);
  max-height: 82px;
  object-fit: contain;
}

.component-specimen--status img {
  width: 53px;
  height: 54px;
}

.component-specimen--icons img {
  width: auto;
  max-width: 42px;
}

.modal-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: 28px;
  align-items: center;
}

.modal-sim {
  padding: 32px;
  border: 2px solid var(--spec-modal-line);
  background: var(--spec-panel);
}

.modal-title {
  padding-bottom: 18px;
  color: #fff;
  text-align: center;
  font-size: 20px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}

.video-box {
  grid-column: span 2;
}

.video-box:nth-child(4) {
  grid-column: 2 / span 2;
}

.video-box:nth-child(5) {
  grid-column: 4 / span 2;
}

.video-label {
  padding: 7px 10px;
  border: 1px solid var(--spec-primary);
  color: var(--spec-table);
  background: #101c3b;
  text-align: center;
  font-size: 12px;
}

.video-blank {
  aspect-ratio: 380 / 239;
  border: 1px solid #274e97;
  background: #000;
}

.modal-copy {
  padding: 28px;
  border: 1px solid var(--spec-line);
  border-radius: 16px;
  background: var(--spec-surface);
}

.modal-copy h3 {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-size: 28px;
  font-weight: 500;
}

.modal-copy ul,
.delivery-list {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--spec-muted);
  line-height: 1.85;
}

.delivery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.delivery-card {
  padding: 30px;
  border: 1px solid var(--spec-line);
  border-radius: 16px;
  background: var(--spec-surface);
}

.delivery-card h3 {
  margin: 14px 0 0;
  font-family: "Noto Serif SC", serif;
  font-size: 28px;
  font-weight: 500;
}

.evidence-note {
  margin-top: 24px;
  padding: 20px 22px;
  border-left: 3px solid var(--spec-blue);
  color: #50616d;
  background: #eef1f5;
  font-size: 13px;
  line-height: 1.8;
}

.spec-footer {
  padding: 42px 0;
  background: var(--spec-ink);
  color: #eef3f5;
}

.spec-footer .spec-container {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.spec-footer a {
  color: #bcd1ff;
}

@media (max-width: 980px) {
  .spec-links {
    display: none;
  }

  .spec-hero-grid,
  .modal-layout {
    grid-template-columns: 1fr;
  }

  .spec-proof {
    padding-left: 0;
    border-top: 1px solid var(--spec-line);
    border-left: 0;
  }

  .spec-facts,
  .token-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .component-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .type-row {
    grid-template-columns: 1fr 1fr;
  }

  .type-row--head span:nth-child(n + 3) {
    display: none;
  }
}

@media (max-width: 680px) {
  .spec-nav,
  .spec-container {
    width: min(100% - 28px, 960px);
  }

  .spec-section {
    padding: 76px 0;
  }

  .spec-hero {
    padding-top: 82px;
  }

  .spec-topline {
    flex-direction: column;
    gap: 8px;
  }

  .spec-hero h1 {
    font-size: 48px;
  }

  .spec-facts,
  .token-grid,
  .component-grid,
  .delivery-grid {
    grid-template-columns: 1fr;
  }

  .dashboard-proof {
    padding: 12px;
  }

  .type-row,
  .measure-row {
    grid-template-columns: 1fr;
  }

  .type-row--head,
  .measure-row--head {
    display: none;
  }

  .layout-zone {
    font-size: 8px;
  }

  .modal-sim {
    padding: 12px;
  }

  .video-grid {
    grid-template-columns: 1fr;
  }

  .video-box,
  .video-box:nth-child(4),
  .video-box:nth-child(5) {
    grid-column: auto;
  }

  .spec-footer .spec-container {
    align-items: flex-start;
    flex-direction: column;
  }
}