/*
 * Brand Signal OS — light editorial edition
 * Loaded after experimental-redesign.css as the production light theme.
 */

:root {
  --signal-ink: #111318;
  --signal-panel: #ffffff;
  --signal-panel-2: #f4f6f9;
  --signal-paper: #ffffff;
  --signal-white: #111318;
  --signal-muted: #4e5868;
  --signal-dim: #737d8b;
  --signal-line: rgba(17, 19, 24, 0.14);
  --signal-line-strong: rgba(17, 19, 24, 0.24);
  --signal-blue-soft: rgba(19, 92, 255, 0.08);
  --signal-blue-line: rgba(19, 92, 255, 0.32);
  --light-canvas: #f5f6f8;
  --light-surface: #ffffff;
  --light-surface-blue: #f0f4ff;
  --light-ink-soft: #29313d;
  --light-shadow: 0 22px 70px rgba(24, 36, 58, 0.08);
}

html {
  color-scheme: light;
  scrollbar-color: var(--signal-blue) #eef0f3;
}

body {
  background: var(--light-canvas);
  color: var(--signal-ink);
}

body::before {
  background:
    radial-gradient(circle at 76% 8%, rgba(19, 92, 255, 0.1), transparent 30rem),
    linear-gradient(rgba(17, 19, 24, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 19, 24, 0.035) 1px, transparent 1px),
    var(--light-canvas);
  background-size:
    auto,
    48px 48px,
    48px 48px,
    auto;
}

body::after {
  opacity: 0.055;
  mix-blend-mode: multiply;
}

::-webkit-scrollbar-track {
  background: #eef0f3;
}

::-webkit-scrollbar-thumb {
  border-color: #eef0f3;
}

::selection {
  background: var(--signal-blue);
  color: #ffffff;
}

.field-canvas {
  opacity: 0.3;
  mix-blend-mode: multiply;
}

.page-progress {
  background: rgba(17, 19, 24, 0.08);
}

.cursor-dot {
  background: var(--signal-blue);
  mix-blend-mode: normal;
}

.cursor-ring {
  border-color: rgba(17, 19, 24, 0.46);
  mix-blend-mode: normal;
}

.cursor-ring.is-interactive {
  border-color: var(--signal-blue);
  background: rgba(19, 92, 255, 0.07);
}

.sidebar {
  border-right-color: var(--signal-line);
  background: rgba(255, 255, 255, 0.86);
  color: var(--signal-ink);
  box-shadow: 14px 0 50px rgba(32, 43, 63, 0.035);
}

.brand-lockup > span:last-child,
.nav-item span,
.sidebar-note span:last-child {
  border-color: var(--signal-line);
  background: rgba(255, 255, 255, 0.97);
  color: var(--signal-ink);
  box-shadow: var(--light-shadow);
}

.brand-lockup strong {
  color: var(--signal-ink);
}

.brand-lockup small,
.sidebar-note span:last-child {
  color: var(--signal-muted);
}

.brand-mark {
  border-color: var(--signal-line);
  background: #ffffff;
  box-shadow:
    0 0 0 6px rgba(19, 92, 255, 0.035),
    0 16px 38px rgba(24, 36, 58, 0.1);
}

.nav-item {
  color: #697486;
}

.nav-item:hover {
  border-color: var(--signal-line);
  background: #f0f3f8;
  color: var(--signal-ink);
}

.nav-item.is-active {
  border-color: var(--signal-blue);
  background: var(--signal-blue);
  color: #ffffff;
}

.sidebar-note {
  border-color: var(--signal-line);
  background: #ffffff;
}

.topbar {
  border-bottom-color: var(--signal-line);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 12px 44px rgba(24, 36, 58, 0.035);
}

.topbar h1 {
  color: var(--signal-ink);
}

.search-box {
  border-color: rgba(17, 19, 24, 0.18);
  background: #ffffff;
  color: var(--signal-muted);
  box-shadow: 0 8px 30px rgba(24, 36, 58, 0.045);
}

.search-box:focus-within {
  border-color: var(--signal-blue);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(19, 92, 255, 0.08);
}

.search-box input {
  color: var(--signal-ink);
}

.search-box input::placeholder {
  color: #7c8592;
  opacity: 1;
}

.search-box::after {
  color: #808998;
}

.interface-meta {
  color: #5d6775;
}

.interface-meta time {
  color: var(--signal-ink);
}

.search-results {
  border-color: var(--signal-line-strong);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 28px 80px rgba(24, 36, 58, 0.16);
}

.search-result-item {
  color: var(--signal-ink);
}

.search-result-item:hover,
.search-result-item:focus-visible {
  border-color: var(--signal-blue-line);
  background: var(--light-surface-blue);
}

.search-result-copy small,
.search-result-arrow,
.search-result-empty {
  color: var(--signal-muted);
}

.summary-band::before {
  background: linear-gradient(
    90deg,
    var(--signal-blue) 0 12%,
    var(--signal-line) 12% 100%
  );
}

.summary-copy::before {
  color: #677181;
}

.summary-copy h2 {
  max-width: 840px;
  color: var(--signal-ink);
  font-size: clamp(62px, 6.5vw, 118px);
  line-height: 0.9;
  letter-spacing: -0.058em;
}

.summary-copy h2 span:last-child {
  color: #5f6d82;
  -webkit-text-stroke: 0;
}

.summary-copy > p {
  max-width: 720px;
  color: #3f4957;
  font-size: 15px;
  line-height: 1.88;
}

.hero-proof span {
  border-color: rgba(17, 19, 24, 0.17);
  background: rgba(255, 255, 255, 0.62);
  color: #55606f;
}

.hero-proof span:last-child {
  border-right-color: rgba(17, 19, 24, 0.17);
}

.hero-proof strong {
  color: var(--signal-ink);
}

.slogan-card {
  border-color: var(--signal-blue);
  background: var(--signal-blue);
  color: #ffffff;
  box-shadow: 0 20px 60px rgba(19, 92, 255, 0.17);
}

.slogan-card strong,
.slogan-card .copy-btn {
  color: #ffffff;
}

.slogan-card .copy-btn {
  border-color: rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.08);
}

.primary-action {
  color: #ffffff;
}

.secondary-action,
.copy-btn,
.action-link {
  border-color: rgba(17, 19, 24, 0.18);
  background: #ffffff;
  color: var(--signal-ink);
}

.primary-action:hover,
.secondary-action:hover,
.copy-btn:hover,
.action-link:hover {
  border-color: var(--signal-blue);
  background: var(--signal-blue);
  color: #ffffff;
}

.visual-strip::before {
  border-color: rgba(17, 19, 24, 0.13);
  background:
    radial-gradient(circle, rgba(19, 92, 255, 0.32) 0 1px, transparent 2px),
    repeating-radial-gradient(
      circle,
      transparent 0 48px,
      rgba(17, 19, 24, 0.075) 49px,
      transparent 50px
    );
  box-shadow:
    0 0 0 34px rgba(19, 92, 255, 0.018),
    0 0 120px rgba(19, 92, 255, 0.1);
}

.visual-strip::after {
  border-color: var(--signal-blue-line);
}

.brand-preview-card {
  border-color: rgba(17, 19, 24, 0.15);
  background: #ffffff;
  color: var(--signal-ink);
  box-shadow:
    0 36px 100px rgba(30, 42, 64, 0.17),
    0 0 0 1px rgba(17, 19, 24, 0.035);
}

.brand-preview-card::before {
  border-color: rgba(17, 19, 24, 0.16);
}

.brand-preview-card.is-chacktok {
  background: var(--signal-blue);
  color: #ffffff;
}

.section-heading {
  border-bottom-color: var(--signal-line);
}

.section-heading h2,
.scenario-copy h3,
.quick-card h3,
.brand-card h3,
.guideline-card h3,
.promotion-action-card h3,
.promotion-signal-card h3,
.promotion-skill-card h3,
.promotion-resource-card h3,
.channel-card h3,
.asset-image-card h3,
.asset-path-card h3,
.office-template-card h3,
.copy-card h3,
.signature-card h3,
.sync-source-card h3,
.sync-panel h3 {
  color: var(--signal-ink);
}

.section-heading p:not(.eyebrow),
.scenario-copy p,
.quick-card p,
.brand-card p,
.guideline-card p,
.promotion-action-card p,
.promotion-signal-card p,
.promotion-skill-card p,
.promotion-resource-card p,
.channel-card p,
.asset-image-card p,
.asset-path-card p,
.office-template-card p,
.copy-card p,
.signature-card p,
.sync-source-card p,
.sync-panel p {
  color: var(--signal-muted);
  font-size: 14px;
  line-height: 1.78;
}

.scenario-grid {
  background: rgba(17, 19, 24, 0.13);
}

.scenario-card,
.quick-card,
.sync-panel,
.sync-source-card,
.overview-guidance,
.brand-card,
.guideline-card,
.promotion-action-card,
.promotion-signal-card,
.promotion-skill-card,
.promotion-resource-card,
.channel-card,
.asset-image-card,
.asset-path-card,
.office-template-card,
.copy-card,
.signature-form,
.signature-preview-card,
.signature-card,
.inventory-note,
.table-wrap {
  border-color: var(--signal-line);
  background-color: #ffffff;
  color: var(--signal-ink);
}

.scenario-card {
  background-color: #ffffff;
}

.scenario-card::before {
  border-color: rgba(17, 19, 24, 0.12);
}

.scenario-card:hover,
.quick-card:hover,
.brand-card:hover,
.guideline-card:hover,
.promotion-action-card:hover,
.promotion-signal-card:hover,
.promotion-skill-card:hover,
.promotion-resource-card:hover,
.channel-card:hover,
.asset-image-card:hover,
.asset-path-card:hover,
.office-template-card:hover,
.copy-card:hover,
.signature-card:hover,
.sync-source-card:hover {
  border-color: var(--signal-blue-line);
  background-color: var(--light-surface-blue);
  box-shadow: 0 24px 60px rgba(24, 36, 58, 0.08);
}

.scenario-card:hover,
.quick-card:hover,
.brand-card:hover,
.promotion-skill-card:hover,
.channel-card:hover {
  background-image: radial-gradient(
    340px circle at var(--pointer-x, 50%) var(--pointer-y, 50%),
    rgba(19, 92, 255, 0.09),
    transparent 70%
  );
}

.scenario-icon,
.quick-icon,
.promotion-icon {
  border-color: rgba(17, 19, 24, 0.16);
  background: #f7f9fc;
  color: var(--signal-blue);
}

.scenario-card .action-link,
.quick-card .action-link {
  border-top-color: rgba(17, 19, 24, 0.14);
  background: transparent;
}

.overview-guidance {
  background: #ffffff;
  color: var(--signal-ink);
  box-shadow: var(--light-shadow);
}

.overview-guidance .section-heading,
.guidance-grid article {
  border-color: rgba(17, 19, 24, 0.15);
}

.guidance-grid strong {
  color: var(--signal-ink);
}

.guidance-grid span {
  color: #4b5665;
  font-size: 14px;
  line-height: 1.75;
}

.promotion-hero {
  border-color: var(--signal-blue-line);
  background:
    linear-gradient(120deg, rgba(19, 92, 255, 0.09), transparent 52%),
    #ffffff;
  box-shadow: var(--light-shadow);
}

.promotion-hero h3 {
  color: var(--signal-ink);
}

.promotion-hero p {
  color: #485363;
}

.promotion-hero::after {
  border-color: var(--signal-blue-line);
  box-shadow:
    0 0 0 60px rgba(19, 92, 255, 0.025),
    0 0 0 120px rgba(19, 92, 255, 0.015);
}

.promotion-flow article {
  border-color: var(--signal-line);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 15px 40px rgba(24, 36, 58, 0.055);
}

.promotion-flow strong {
  color: var(--signal-ink);
}

.promotion-skill-disclaimer,
.asset-panel-note,
.inventory-note,
.form-note {
  border-color: var(--signal-line);
  background: #ffffff;
  color: #4b5665;
}

.filter-row select,
.section-heading select,
.form-grid input,
.form-grid select {
  border-color: rgba(17, 19, 24, 0.18);
  background: #ffffff;
  color: var(--signal-ink);
}

.channel-card a {
  color: #004fe3;
}

.asset-image-preview {
  background-color: #f0f2f5;
  background-image:
    linear-gradient(45deg, rgba(17, 19, 24, 0.05) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(17, 19, 24, 0.05) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(17, 19, 24, 0.05) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(17, 19, 24, 0.05) 75%);
}

.office-template-hero {
  border-color: var(--signal-blue-line);
  background:
    repeating-linear-gradient(
      90deg,
      transparent 0 67px,
      rgba(17, 19, 24, 0.035) 68px
    ),
    #ffffff;
  box-shadow: var(--light-shadow);
}

.office-template-hero h3 {
  color: var(--signal-ink);
}

.office-template-hero p {
  color: var(--signal-muted);
}

.table-wrap {
  border-color: var(--signal-line);
  background: #ffffff;
}

thead {
  background: #152c5b;
}

tbody tr {
  background: #ffffff;
}

tbody tr:nth-child(even) {
  background: #f7f8fa;
}

tbody tr:hover {
  background: var(--light-surface-blue);
}

td {
  border-color: rgba(17, 19, 24, 0.11);
  color: #3f4957;
}

.copy-card pre,
.path-box,
.copy-block,
code {
  border-color: rgba(17, 19, 24, 0.14);
  background: #f6f7f9;
  color: #364150;
}

.signature-form {
  background: #ffffff;
}

.signature-preview-card {
  background: #f5f6f8;
}

.sync-meta-grid article,
.visitor-stats span {
  border-color: var(--signal-line);
  background: #f7f8fa;
}

.sync-meta-grid article span,
.visitor-stats span {
  color: #566172;
}

.sync-meta-grid article strong,
.visitor-stats strong {
  color: var(--signal-ink);
}

.empty-state {
  border-color: var(--signal-line);
  background: #ffffff;
  color: var(--signal-muted);
}

.toast {
  color: #ffffff;
}

.is-search-focus {
  box-shadow:
    0 0 0 2px var(--signal-blue),
    0 18px 50px rgba(19, 92, 255, 0.14) !important;
}

@media (max-width: 960px) {
  .sidebar {
    border-color: rgba(17, 19, 24, 0.2);
    background: rgba(255, 255, 255, 0.93);
    box-shadow: 0 22px 60px rgba(24, 36, 58, 0.18);
  }
}

@media (max-width: 680px) {
  body::before {
    background-size:
      auto,
      32px 32px,
      32px 32px,
      auto;
  }

  .topbar {
    background: rgba(255, 255, 255, 0.96);
  }

  .summary-copy h2 {
    font-size: clamp(52px, 16vw, 72px);
    line-height: 0.92;
  }

  .summary-copy > p,
  .section-heading p:not(.eyebrow),
  .scenario-copy p,
  .quick-card p {
    font-size: 14px;
    line-height: 1.82;
  }

  .hero-proof span {
    background: #ffffff;
  }

  .scenario-card {
    min-height: 280px;
  }
}

/* Navigation clarity, title scale, and hero brand visibility */

@media (min-width: 961px) {
  :root {
    --signal-rail: 232px;
  }

  .sidebar {
    width: var(--signal-rail);
    gap: 16px;
    padding: 18px 14px;
  }

  .brand-lockup {
    display: flex;
    width: 100%;
    height: 66px;
    justify-content: flex-start;
    gap: 11px;
    padding: 7px 8px;
  }

  .brand-lockup > span:last-child {
    position: static;
    display: block;
    min-width: 0;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
    opacity: 1;
    transform: none;
  }

  .brand-lockup strong {
    font-size: 13px;
    letter-spacing: -0.01em;
  }

  .brand-lockup small {
    max-width: 122px;
    margin-top: 4px;
    overflow: hidden;
    font-size: 9px;
    letter-spacing: 0.02em;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .brand-mark {
    width: 62px;
    height: 46px;
    padding: 7px;
    border-radius: 11px;
  }

  .nav-list {
    align-items: stretch;
    gap: 4px;
    padding: 2px 0;
  }

  .nav-item {
    display: flex;
    width: 100%;
    min-width: 0;
    height: 44px;
    min-height: 44px;
    justify-content: flex-start;
    gap: 12px;
    padding: 0 13px;
    border-radius: 10px;
  }

  .nav-item span {
    position: static;
    display: block;
    min-width: 0;
    max-width: none;
    padding: 0;
    overflow: hidden;
    border: 0;
    background: transparent;
    color: inherit;
    box-shadow: none;
    font-family: var(--signal-body);
    font-size: 13px;
    font-weight: 560;
    letter-spacing: 0;
    opacity: 1;
    transform: none;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .nav-item:hover span,
  .nav-item:focus-visible span,
  .nav-item.is-active span {
    color: inherit;
    opacity: 1;
    transform: none;
  }

  .nav-item svg {
    width: 18px;
    height: 18px;
  }

  .nav-item.is-active::before {
    top: 10px;
    right: auto;
    bottom: 10px;
    left: -1px;
    width: 3px;
    height: auto;
    transform: none;
  }

  .sidebar-note {
    display: flex;
    width: 100%;
    height: auto;
    min-height: 58px;
    justify-content: flex-start;
    gap: 10px;
    padding: 11px 12px;
    border-radius: 12px;
  }

  .sidebar-note span:last-child {
    position: static;
    display: block;
    width: auto;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
    font-family: var(--signal-body);
    font-size: 10px;
    line-height: 1.5;
    letter-spacing: 0;
    opacity: 1;
    transform: none;
  }

  .sidebar-note:hover span:last-child {
    opacity: 1;
    transform: none;
  }
}

.summary-copy h2 {
  max-width: 780px;
  font-size: clamp(56px, 5.72vw, 104px);
  line-height: 0.94;
}

.brand-preview-card:first-child img {
  width: 82%;
  max-width: none;
  height: 92px;
  max-height: none;
  object-fit: cover;
  object-position: center 50%;
}

.brand-preview-card.is-chacktok img {
  position: relative;
  z-index: 2;
  width: 78px;
  height: 78px;
  max-width: none;
  max-height: none;
  object-fit: contain;
  object-position: left center;
  filter: none;
}

@media (min-width: 1600px) {
  .summary-band {
    width: min(100%, 1660px);
    margin-right: auto;
    margin-left: auto;
    grid-template-columns: minmax(680px, 0.9fr) minmax(600px, 1.1fr);
    gap: 0;
  }

  .visual-strip {
    transform: translateX(-88px);
  }
}

@media (max-width: 1280px) and (min-width: 961px) {
  :root {
    --signal-rail: 208px;
  }

  .sidebar {
    padding-right: 11px;
    padding-left: 11px;
  }

  .nav-item {
    padding-right: 11px;
    padding-left: 11px;
  }

  .nav-item span {
    font-size: 12px;
  }
}

@media (max-width: 960px) {
  :root {
    --signal-rail: 0px;
  }

  .sidebar {
    top: auto;
    right: 14px;
    bottom: 12px;
    left: 14px;
    display: flex;
    width: auto;
    height: 72px;
    flex-direction: row;
    gap: 8px;
    padding: 9px;
  }

  .brand-lockup,
  .sidebar-note {
    display: none;
  }

  .nav-list {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 5px;
  }

  .nav-item {
    display: grid;
    width: 52px;
    min-width: 52px;
    height: 52px;
    min-height: 52px;
    place-items: center;
    padding: 0;
    border-radius: 50%;
  }

  .nav-item span {
    display: none;
  }

  .nav-item.is-active::before {
    top: auto;
    right: 50%;
    bottom: -10px;
    left: auto;
    width: 12px;
    height: 1px;
    transform: translateX(50%);
  }
}

@media (max-width: 680px) {
  .summary-copy h2 {
    max-width: 100%;
    font-size: clamp(48px, 14vw, 64px);
    line-height: 0.96;
  }

  .brand-preview-card:first-child img {
    height: 76px;
  }

  .brand-preview-card.is-chacktok img {
    width: 62px;
    height: 62px;
  }
}

.site-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-top: clamp(32px, 4vw, 48px);
  padding: 16px 0 0;
  border-top: 1px solid var(--signal-line);
  color: var(--signal-muted);
}

.site-footer div {
  display: grid;
  gap: 3px;
}

.site-footer span {
  color: var(--signal-blue);
  font-family: var(--signal-mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.site-footer strong {
  color: var(--signal-ink);
  font-family: var(--signal-display);
  font-size: 16px;
  font-weight: 560;
  letter-spacing: -0.025em;
}

.site-footer p {
  margin: 0;
  font-family: var(--signal-mono);
  font-size: 9px;
  letter-spacing: 0.04em;
  text-align: right;
}

@media (max-width: 680px) {
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    margin-top: 28px;
    margin-bottom: 0;
    padding-top: 12px;
  }

  .site-footer p {
    text-align: left;
  }
}