:root {
  --bg: #03070d;
  --bg-2: #07111e;
  --panel: rgba(8, 18, 32, 0.84);
  --panel-2: rgba(10, 22, 39, 0.92);
  --panel-soft: rgba(10, 20, 35, 0.7);
  --border: rgba(126, 153, 196, 0.16);
  --border-strong: rgba(157, 183, 223, 0.24);
  --text: #e6ecf5;
  --text-soft: #a5b0c1;
  --text-muted: #7e899b;
  --accent: #d5b37c;
  --accent-soft: rgba(213, 179, 124, 0.18);
  --good: #8ec9a3;
  --bad: #d17979;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.34);
  --radius: 18px;
  --radius-sm: 12px;
  --toolbar-h: 74px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top center, rgba(37, 73, 128, 0.16), transparent 34%),
    linear-gradient(180deg, #02060c 0%, #02060b 38%, #03080f 100%);
  color: var(--text);
  font-family: "Inter", sans-serif;
}

body {
  overflow-x: hidden;
}

button {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  padding-bottom: var(--toolbar-h);
}

.topbar {
  height: 88px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(159, 178, 214, 0.14);
  background:
    linear-gradient(180deg, rgba(6, 12, 22, 0.92), rgba(4, 9, 16, 0.84)),
    radial-gradient(circle at top center, rgba(74, 118, 193, 0.16), transparent 40%);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.24);
}

.brand-wrap {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.brand {
  font-family: "Cormorant Garamond", serif;
  font-size: 2.15rem;
  line-height: 1;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.brand-subtitle {
  color: var(--text-soft);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.release-tag {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(8, 16, 30, 0.7);
  color: var(--text-soft);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.main-grid {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 28px;
  padding: 28px 28px 18px;
}

.sidebar-panel,
.content-panel {
  border: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(8, 18, 32, 0.9), rgba(7, 15, 27, 0.85)),
    radial-gradient(circle at top center, rgba(63, 97, 157, 0.08), transparent 48%);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.sidebar-panel {
  padding: 22px 20px;
}

.panel-kicker,
.content-kicker,
.section-label,
.footer-label {
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.sidebar-nav {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nav-item {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-soft);
  padding: 14px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: 180ms ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.nav-item:hover:not(:disabled):not(.locked),
.nav-item.active {
  background: linear-gradient(180deg, rgba(17, 31, 53, 0.86), rgba(11, 22, 39, 0.88));
  border-color: var(--border-strong);
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(213, 179, 124, 0.05), 0 0 18px rgba(56, 109, 194, 0.08);
}

.nav-parent.active {
  border-left: 2px solid rgba(213, 179, 124, 0.7);
}

.nav-child {
  padding: 11px 14px 11px 28px;
  font-size: 0.94rem;
}

.nav-item.locked,
.nav-item:disabled {
  cursor: not-allowed;
  opacity: 0.54;
}

.nav-meta {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.nav-meta.muted {
  color: var(--text-muted);
}

.subnav {
  display: none;
  margin: -2px 0 4px;
  padding-left: 10px;
  border-left: 1px solid rgba(126, 153, 196, 0.12);
}

.subnav.open {
  display: block;
}

.content-panel {
  display: flex;
  flex-direction: column;
  padding: 28px 28px 18px;
  min-height: 700px;
}

.content-view {
  display: none;
  animation: fadeIn 220ms ease;
}

.content-view.active {
  display: block;
}

.content-header {
  margin-bottom: 22px;
}

.content-header h1 {
  margin: 8px 0 0;
  font-family: "Cormorant Garamond", serif;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.08;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.hero-grid,
.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 26px;
}

.hero-copy,
.stacked-cards {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.lead {
  margin: 0;
  font-size: 1.42rem;
  line-height: 1.58;
  color: #eef3fa;
  max-width: 18.5ch;
}

.lead.compact {
  font-size: 1.1rem;
  max-width: none;
}

.body-copy {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.info-card,
.formula-card,
.list-card,
.quote-card,
.comparison-card,
.metric-card,
.cpmai-card {
  border-radius: 16px;
  border: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(8, 18, 33, 0.9), rgba(7, 15, 27, 0.82)),
    radial-gradient(circle at top center, rgba(62, 107, 187, 0.08), transparent 45%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.015);
}

.info-card,
.list-card,
.quote-card {
  padding: 22px 22px;
}

.info-card.full-height,
.quote-card.full-height {
  min-height: 100%;
}

.formula-card {
  padding: 26px 24px;
}

.formula-card.large {
  padding: 28px 24px;
}

.formula-main {
  font-family: "Cormorant Garamond", serif;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.1;
  text-align: center;
  color: #f2f5fa;
}

.formula-main.secondary {
  margin-top: 12px;
  font-size: 2.15rem;
}

.formula-main.small {
  font-size: 2rem;
}

.formula-sub {
  margin-top: 14px;
  text-align: center;
  color: var(--text-soft);
  font-size: 0.92rem;
  line-height: 1.55;
}

.clean-list,
.icon-list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 14px;
  color: var(--text-soft);
  line-height: 1.65;
}

.clean-list.tight {
  gap: 10px;
}

.clean-list li::marker {
  color: rgba(213, 179, 124, 0.82);
}

.hero-visual {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  min-height: 100%;
}

.stack-graphic {
  position: relative;
  min-height: 360px;
  border-radius: 16px;
  border: 1px solid rgba(127, 152, 190, 0.14);
  background:
    linear-gradient(180deg, rgba(4, 10, 18, 0.88), rgba(4, 9, 16, 0.76)),
    radial-gradient(circle at center, rgba(40, 89, 165, 0.08), transparent 55%);
  overflow: hidden;
}

.stack-axis {
  position: absolute;
  top: 48px;
  bottom: 48px;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, transparent, rgba(235, 242, 255, 0.45), transparent);
}

.stack-layer {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  height: 42px;
  width: 72%;
  clip-path: polygon(10% 0%, 90% 0%, 100% 100%, 0% 100%);
  opacity: 0.94;
  filter: drop-shadow(0 8px 14px rgba(0, 0, 0, 0.24));
}

.stack-layer::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 10% 50%, transparent 0 6px, rgba(255, 255, 255, 0.08) 6px 6.5px, transparent 7px),
    linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.12) 50%, transparent 100%);
  background-size: 60px 100%, 100% 100%;
  mix-blend-mode: screen;
}

.l1 { top: 54px;  background: linear-gradient(180deg, rgba(28, 130, 110, 0.88), rgba(13, 74, 63, 0.88)); }
.l2 { top: 110px; background: linear-gradient(180deg, rgba(46, 133, 85, 0.84), rgba(23, 82, 52, 0.9)); }
.l3 { top: 166px; background: linear-gradient(180deg, rgba(136, 122, 27, 0.88), rgba(95, 85, 20, 0.9)); }
.l4 { top: 222px; background: linear-gradient(180deg, rgba(146, 83, 21, 0.88), rgba(101, 57, 16, 0.9)); }
.l5 { top: 278px; background: linear-gradient(180deg, rgba(132, 24, 39, 0.92), rgba(92, 12, 24, 0.9)); }

.visual-caption {
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.quote-card {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 148px;
  text-align: center;
}

.quote-card.japanese {
  min-height: 170px;
  flex-direction: column;
  gap: 10px;
}

.jp-line {
  font-family: "Cormorant Garamond", serif;
  font-size: 2rem;
  color: var(--accent);
  line-height: 1.2;
}

.quote-sub {
  color: #dcc39a;
  font-style: italic;
  font-family: "Cormorant Garamond", serif;
  font-size: 1.25rem;
}

.quote-text {
  font-family: "Cormorant Garamond", serif;
  font-size: 1.7rem;
  line-height: 1.35;
  color: #e6d1a9;
}

.comparison-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  overflow: hidden;
}

.comparison-column {
  padding: 22px 22px 18px;
}

.comparison-column:first-child {
  border-right: 1px solid var(--border);
}

.icon-list {
  list-style: none;
  padding-left: 0;
}

.icon-list li {
  position: relative;
  padding-left: 26px;
}

.icon-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--good);
  font-weight: 700;
}

.negative-list li::before {
  content: "✕";
  color: var(--bad);
}

.metric-grid,
.cpmai-grid {
  display: grid;
  gap: 16px;
}

.metric-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-card {
  min-height: 108px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
}

.metric-card strong {
  font-family: "Cormorant Garamond", serif;
  font-size: 2rem;
  color: #f0f4fa;
}

.metric-card span {
  color: var(--text-soft);
}

.cpmai-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.cpmai-card {
  min-height: 132px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.cpmai-card strong {
  font-family: "Cormorant Garamond", serif;
  font-size: 1.5rem;
}

.cpmai-card span {
  color: var(--text-soft);
  line-height: 1.5;
}

.content-footer {
  margin-top: auto;
  padding-top: 18px;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  color: var(--text-muted);
  font-size: 0.84rem;
  border-top: 1px solid rgba(126, 153, 196, 0.08);
}

.bottom-toolbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--toolbar-h);
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid rgba(160, 182, 220, 0.16);
  background:
    linear-gradient(180deg, rgba(4, 10, 18, 0.96), rgba(3, 8, 14, 0.98)),
    radial-gradient(circle at top center, rgba(62, 107, 187, 0.08), transparent 45%);
  backdrop-filter: blur(12px);
  z-index: 50;
}

.module-tab {
  border: none;
  border-right: 1px solid rgba(126, 153, 196, 0.08);
  background: transparent;
  color: var(--text-soft);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.85rem;
  cursor: default;
  transition: 160ms ease;
}

.module-tab:last-child {
  border-right: none;
}

.module-tab.live.active {
  color: #f0f5fb;
  position: relative;
}

.module-tab.live.active::before {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(213, 179, 124, 0.95), transparent);
  box-shadow: 0 0 18px rgba(213, 179, 124, 0.35);
}

.module-tab.preview {
  color: #909cad;
}

.module-tab.in-build {
  color: #788395;
}

.module-tab:disabled {
  opacity: 0.95;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1280px) {
  .main-grid {
    grid-template-columns: 320px minmax(0, 1fr);
  }

  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cpmai-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .bottom-toolbar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    height: auto;
  }

  .module-tab {
    min-height: 58px;
  }
}

@media (max-width: 980px) {
  .main-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid,
  .two-column,
  .comparison-card {
    grid-template-columns: 1fr;
  }

  .sidebar-panel {
    order: 2;
  }

  .content-panel {
    order: 1;
    min-height: auto;
  }

  .content-footer {
    justify-content: flex-start;
  }
}

@media (max-width: 680px) {
  .topbar {
    height: auto;
    padding: 18px 18px;
    align-items: flex-start;
    gap: 12px;
    flex-direction: column;
  }

  .main-grid {
    padding: 16px 16px 18px;
    gap: 18px;
  }

  .content-panel,
  .sidebar-panel {
    padding: 18px 16px;
  }

  .brand {
    font-size: 1.8rem;
  }

  .brand-subtitle {
    font-size: 0.88rem;
  }

  .lead {
    font-size: 1.08rem;
  }

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

  .quote-text {
    font-size: 1.35rem;
  }
}