/*
 * app.css — AI Hub layout + components, built entirely on Galaxy semantic tokens.
 * Inline surfaces separate by tone (background step / hairline border);
 * shadows are reserved for floating overlays (dropdowns, drawer, modal, toast).
 */

/* ============ Login ================================================= */
.login-body {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
  padding: 48px clamp(24px, 6vw, 96px);
}
.login-brand { max-width: 460px; }
.login-mark {
  width: 64px; height: 64px;
  display: grid; place-items: center;
  color: var(--accent-primary);
  background: var(--accent-subtle);
  border-radius: var(--radius-xl);
  margin-bottom: 20px;
}
.login-brand h1 { font-size: 42px; }
.login-tagline { font-size: 18px; color: var(--text-secondary); max-width: 38ch; }
.login-card {
  background: var(--background-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: 32px;
  max-width: 400px;
  box-shadow: var(--shadow-md);
}
.login-sub { color: var(--text-secondary); }
.login-notice { font-size: 14px; color: var(--text-secondary); margin: 14px 0 0; }
.login-error {
  font-size: 15px; color: var(--status-error-fg);
  background: var(--status-error-bg);
  padding: 8px 12px; border-radius: var(--radius-md); margin-top: 12px;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-size: 16px; font-weight: 600;
  padding: 11px 16px; border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  background: var(--background-surface); color: var(--text-primary);
  transition: background var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.btn:hover { background: var(--background-subtle); }
.btn--google { width: 100%; }
.btn--primary { background: var(--accent-primary); border-color: var(--accent-primary); color: var(--text-on-accent); }
.btn--primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
@media (max-width: 880px) {
  .login-body { grid-template-columns: 1fr; gap: 32px; }
  .login-card { max-width: none; }
}

/* ============ Top bar ============================================== */
.topbar {
  position: sticky; top: 0; z-index: 40;
  height: 56px;
  display: flex; align-items: center; gap: 20px;
  padding: 0 clamp(16px, 4vw, 32px);
  background: var(--background-app);
  border-bottom: 1px solid var(--border-subtle);
}
.topbar__brand { display: flex; align-items: center; gap: 9px; color: var(--text-primary); }
.topbar__mark { color: var(--accent-primary); display: grid; place-items: center; }
.topbar__word { font-weight: 700; font-size: 18px; }
.topbar__nav { display: flex; align-items: center; gap: 4px; }
.topbar__actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.navlink {
  position: relative;
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 10px; border-radius: var(--radius-md);
  color: var(--text-primary); font-weight: 500; font-size: 16px;
  background: transparent; border: 0; cursor: pointer;
}
.navlink:hover { background: var(--background-subtle); color: var(--text-primary); }
.navlink--active { color: var(--text-primary); }
.navlink--active::after {
  content: ""; position: absolute; left: 10px; right: 10px; bottom: -2px; height: 2px;
  background: var(--accent-primary); border-radius: 2px;
}

.icon-btn {
  display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: var(--radius-md);
  border: 1px solid transparent; background: transparent; color: var(--text-primary);
  transition: background var(--dur-fast) var(--ease-out);
}
.icon-btn:hover { background: var(--background-subtle); }
.topbar__hamburger { display: none; }

.topbar__search {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 12px; border-radius: var(--radius-pill);
  background: var(--background-subtle); border: 1px solid var(--border-subtle);
  color: var(--text-secondary); font-size: 15px; min-width: 200px;
}
.topbar__search:hover { border-color: var(--border-default); }
.topbar__search .search-ico { display: grid; place-items: center; color: var(--text-secondary); }
.topbar__search kbd {
  margin-left: auto; font-family: inherit; font-size: 13px;
  padding: 1px 6px; border-radius: var(--radius-sm);
  background: var(--background-surface); border: 1px solid var(--border-subtle);
}

/* avatar */
.avatar-menu { position: relative; }
.avatar {
  width: 34px; height: 34px; border-radius: var(--radius-pill);
  background: var(--accent-subtle); color: var(--accent-darkest);
  border: 1px solid var(--border-subtle); font-weight: 700; font-size: 14px;
  display: grid; place-items: center; overflow: hidden;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar__panel {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 50;
  min-width: 220px; padding: 8px;
  background: var(--background-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
}
.avatar__id { display: flex; flex-direction: column; gap: 2px; padding: 8px 10px; }
.avatar__email { font-size: 14px; color: var(--text-secondary); }
.avatar__signout {
  width: 100%; display: flex; align-items: center; gap: 8px;
  margin-top: 6px; padding: 9px 10px; border-radius: var(--radius-md);
  border: 0; background: transparent; color: var(--text-primary); font-size: 16px; text-align: left;
}
.avatar__signout:hover { background: var(--background-subtle); }

/* dropdowns */
.dropdown { position: relative; }
.dropdown__panel {
  position: absolute; left: 0; top: calc(100% + 6px); z-index: 50;
  min-width: 220px; padding: 6px;
  background: var(--background-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
}
.dropdown__item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 9px 12px; border-radius: var(--radius-md);
  border: 0; background: transparent; color: var(--text-primary);
  font-size: 16px; text-align: left; cursor: pointer;
}
.dropdown__item:hover { background: var(--background-subtle); }

/* ============ View + footer ======================================= */
.view {
  max-width: 1440px; margin: 0 auto;
  padding: 32px clamp(16px, 4vw, 32px) 64px;
  outline: none; min-height: calc(100vh - 56px - 52px);
}
.view--enter { animation: viewIn var(--dur-page) var(--ease-out); }
@keyframes viewIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.section__lede { color: var(--text-secondary); font-size: 17px; margin-bottom: 24px; max-width: 70ch; }
.section { animation: none; }

.footer {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding: 16px clamp(16px, 4vw, 32px);
  border-top: 1px solid var(--border-subtle);
  color: var(--text-secondary); font-size: 14px;
}
.footer__sep { opacity: 0.5; }

/* ============ Cards ================================================ */
.card-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}
.card {
  display: flex; flex-direction: column; gap: 8px;
  padding: 16px; text-align: left;
  background: var(--background-surface);
  border: 1px solid var(--border-default); border-radius: var(--radius-lg);
  transition: border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
  cursor: pointer;
}
.card:hover { border-color: var(--border-strong); background: var(--background-subtle); }
.card__head { display: flex; align-items: center; gap: 8px; }
.card__icon { color: var(--accent-primary); display: grid; place-items: center; }
.card__title { font-weight: 600; font-size: 16px; }
.card__body { color: var(--text-secondary); font-size: 15px; line-height: 1.45; }
.card__chip {
  align-self: flex-start; margin-top: auto;
  font-size: 13px; font-weight: 600; padding: 3px 9px; border-radius: var(--radius-pill);
  background: var(--background-subtle); color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.info-card {
  padding: 20px; background: var(--background-surface);
  border: 1px solid var(--border-default); border-radius: var(--radius-lg);
}
.info-card__icon { color: var(--accent-primary); margin-bottom: 8px; }

.stat-card {
  padding: 20px; text-align: center;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-muted); border-radius: var(--radius-xl);
}
.stat-card__value { font-size: 36px; font-weight: 800; color: var(--accent-darkest); line-height: 1; }
.stat-card__label { font-size: 14px; color: var(--text-secondary); margin-top: 6px; }

.empty-state { text-align: center; padding: 56px 24px; color: var(--text-secondary); }
.empty-state__icon { color: var(--accent-primary); display: inline-grid; margin-bottom: 8px; }

.info-card__source {
  margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--border-subtle);
  font-size: 13.5px; color: var(--text-disabled);
}
.info-card__source a { font-weight: 600; }
.info-card__cta {
  margin-top: 12px; display: inline-flex; align-items: center; gap: 6px;
  background: none; border: 0; padding: 0; font-family: inherit; font-size: 14.5px; font-weight: 600;
  color: var(--accent2-primary); cursor: pointer;
}
.info-card__cta:hover { text-decoration: underline; }

/* ============ Learn Fundamentals ==================================== */
.fund-hero {
  position: relative; overflow: hidden; border-radius: var(--radius-xl);
  padding: 34px clamp(20px, 4vw, 44px); margin-bottom: 28px; color: #fff;
  background:
    radial-gradient(620px 260px at 88% -20%, rgba(53, 118, 223, .55), transparent 60%),
    linear-gradient(120deg, var(--color-neutral-dark-300) 0%, var(--color-neutral-dark-200) 48%, var(--color-blue-darkest) 100%);
}
.fund-hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; color: #bcd0f5; margin-bottom: 12px;
}
.fund-hero__eyebrow::before { content: ""; width: 20px; height: 2px; background: var(--color-blue-accent); border-radius: 2px; }
.fund-hero__title { color: #fff; font-size: 29px; max-width: 34ch; margin: 0 0 8px; line-height: 1.2; }
.fund-hero__sub { color: #c9d6f2; font-size: 16.5px; max-width: 58ch; margin: 0; }
.fund-hero__pills { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 18px; }
.fund-hero__pill {
  font-size: 13.5px; font-weight: 600; padding: 5px 12px; border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .18); color: #e7edfa;
}

.section-head { margin-bottom: 14px; }
.section-head .eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; color: var(--accent2-primary); margin-bottom: 6px;
}
.section-head .eyebrow::before { content: ""; width: 18px; height: 2px; background: var(--accent2-primary); border-radius: 2px; }
.section-head h2 { font-size: 22px; margin: 0; }

.surface-row { display: grid; gap: 14px; grid-template-columns: repeat(3, 1fr); margin-bottom: 14px; }
.surface-card {
  padding: 18px; background: var(--background-surface); border: 1px solid var(--border-default);
  border-radius: var(--radius-lg); display: flex; flex-direction: column; gap: 8px;
}
.surface-card__head { display: flex; align-items: center; gap: 9px; }
.surface-card__icon {
  width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center; flex-shrink: 0;
  background: var(--accent2-subtle); color: var(--accent2-darkest);
}
.surface-card h3 { font-size: 17px; font-weight: 700; margin: 0; }
.surface-card p { color: var(--text-secondary); font-size: 14.8px; line-height: 1.5; margin: 0; }
.surface-card__tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 2px; }
.tagchip {
  font-size: 12.8px; font-weight: 600; padding: 3px 9px; border-radius: var(--radius-pill);
  background: var(--background-subtle); color: var(--text-secondary); border: 1px solid var(--border-subtle);
}

.callout {
  display: flex; gap: 14px; padding: 16px 18px; border-radius: var(--radius-lg);
  background: var(--accent2-subtle); border: 1px solid var(--accent2-primary);
  margin-bottom: 30px;
}
.callout__icon { color: var(--accent2-darkest); flex-shrink: 0; margin-top: 1px; }
.callout p { margin: 0 0 4px; font-size: 15px; color: var(--text-primary); line-height: 1.55; }
.callout p:last-child { margin-bottom: 0; }
.callout b { color: var(--accent2-darkest); }
.callout .info-card__source { border-top: 0; padding-top: 6px; margin-top: 6px; }

/* -- serial-vs-parallel mechanism diagram -- */
figure.flow-diagram { margin: 0 0 26px; }
.flow-diagram__caption { font-size: 14px; color: var(--text-disabled); margin-top: 10px; }
.flow-grid {
  display: grid; grid-template-columns: 1fr 1px 1fr; gap: 0;
  background: var(--background-surface); border: 1px solid var(--border-default); border-radius: var(--radius-lg);
  overflow: hidden;
}
.flow-divider { background: var(--border-subtle); }
.flow-panel { padding: 22px 22px 18px; display: flex; flex-direction: column; }
.flow-panel__title { font-size: 18px; font-weight: 700; text-align: center; margin: 0; }
.flow-panel__subtitle { font-size: 14.5px; font-style: italic; color: var(--text-secondary); text-align: center; margin: 2px 0 16px; }
.flow-caption { font-size: 13.5px; color: var(--text-disabled); text-align: center; margin-top: 14px; }
.flow-caption b { color: var(--text-secondary); }
.flow-well { background: var(--background-subtle); border-radius: var(--radius-md); padding: 16px; flex: 1; }
.flow-chip {
  display: inline-block; background: var(--background-surface); border: 1px solid var(--border-default);
  border-radius: var(--radius-pill); padding: 5px 13px; font-size: 14px; font-weight: 600; color: var(--text-primary);
}
.flow-skeleton { height: 7px; border-radius: 4px; background: var(--border-default); margin: 7px 0 0; }
.flow-thread .flow-turn { margin-bottom: 14px; }
.flow-thread .flow-turn:last-of-type { margin-bottom: 0; }
.flow-ellipsis { text-align: center; color: var(--text-disabled); letter-spacing: .2em; font-size: 15px; margin-top: 2px; }
.flow-goal { display: flex; justify-content: center; }
.flow-svg { display: block; width: 100%; color: var(--border-strong); }
.flow-branches { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.flow-task { background: var(--background-surface); border: 1px solid var(--border-default); border-radius: var(--radius-md); padding: 9px 10px; }
.flow-task__title { font-size: 13.5px; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.flow-finish {
  display: flex; align-items: center; gap: 9px; background: var(--background-surface);
  border: 1px solid var(--accent2-primary); border-radius: var(--radius-md); padding: 10px 12px;
  max-width: 210px; margin: 0 auto;
}
.flow-finish__icon {
  width: 26px; height: 26px; border-radius: 7px; background: var(--accent2-subtle); color: var(--accent2-darkest);
  display: grid; place-items: center; flex-shrink: 0;
}
.flow-finish__title { font-size: 14px; font-weight: 700; color: var(--text-primary); }
.flow-finish__sub { font-size: 13px; color: var(--text-secondary); }

/* -- model selection: table + cost chart -- */
.model-wrap {
  background: var(--background-surface); border: 1px solid var(--border-default); border-radius: var(--radius-lg);
  padding: 22px clamp(16px, 3vw, 26px); margin-bottom: 30px;
}
.model-table { width: 100%; border-collapse: collapse; }
.model-table th {
  text-align: left; font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em;
  color: var(--text-disabled); padding: 0 10px 10px 0; border-bottom: 1px solid var(--border-subtle);
}
.model-table td { padding: 14px 10px 14px 0; border-bottom: 1px solid var(--border-subtle); vertical-align: top; }
.model-table tr:last-child td { border-bottom: 0; }
.model-table td:first-child, .model-table th:first-child { width: 15%; white-space: nowrap; }
.model-table td:nth-child(2), .model-table th:nth-child(2) { width: 20%; white-space: nowrap; }
.model-name { font-weight: 700; font-size: 16.5px; }
.model-weight { display: flex; align-items: center; gap: 8px; font-size: 14.5px; color: var(--text-secondary); }
.model-weight__dots { display: inline-flex; gap: 3px; }
.model-weight__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--border-default); }
.model-weight__dot--on { background: var(--accent2-primary); }
.model-table ul { margin: 0; padding-left: 16px; font-size: 14.8px; color: var(--text-secondary); line-height: 1.6; }
.model-source { font-size: 13.5px; color: var(--text-disabled); margin: 14px 0 0; }

.cost-chart { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--border-subtle); }
.cost-chart__head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.cost-chart__title { font-size: 15px; font-weight: 700; }
.cost-legend { display: flex; gap: 16px; font-size: 13.5px; color: var(--text-secondary); }
.cost-legend__item { display: inline-flex; align-items: center; gap: 6px; }
.cost-legend__swatch { width: 9px; height: 9px; border-radius: 2px; }
.cost-row { display: grid; grid-template-columns: 64px 1fr; align-items: center; gap: 12px; margin-bottom: 12px; }
.cost-row:last-child { margin-bottom: 0; }
.cost-row__label { font-size: 14.5px; font-weight: 600; text-align: right; }
.cost-bars { display: flex; flex-direction: column; gap: 4px; }
.cost-bar-track { display: flex; align-items: center; gap: 8px; }
.cost-bar { height: 9px; border-radius: 5px; }
.cost-bar--input { background: var(--chart-input); }
.cost-bar--output { background: var(--chart-output); }
.cost-bar-value { font-size: 13px; color: var(--text-secondary); font-variant-numeric: tabular-nums; white-space: nowrap; }
.cost-chart__foot { font-size: 13px; color: var(--text-disabled); margin-top: 12px; }

@media (max-width: 860px) {
  .surface-row { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .flow-grid { grid-template-columns: 1fr; }
  .flow-divider { display: none; }
}

/* ============ Tabs + pills ========================================= */
.tabs { display: flex; gap: 4px; flex-wrap: wrap; border-bottom: 1px solid var(--border-subtle); margin-bottom: 16px; }
.tab {
  padding: 9px 14px; border: 0; background: transparent; color: var(--text-secondary);
  font-size: 16px; font-weight: 600; cursor: pointer; position: relative;
}
.tab:hover { color: var(--text-primary); }
.tab--active { color: var(--text-primary); }
.tab--active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: -1px; height: 2px;
  background: var(--accent-primary);
}
.pills { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.pill {
  padding: 6px 13px; border-radius: var(--radius-pill);
  border: 1px solid var(--border-default); background: var(--background-surface);
  color: var(--text-secondary); font-size: 15px; font-weight: 500; cursor: pointer;
  transition: all var(--dur-fast) var(--ease-out);
}
.pill:hover { border-color: var(--border-strong); }
.pill--active { background: var(--accent-primary); border-color: var(--accent-primary); color: var(--text-on-accent); }

.toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.text-input {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: var(--radius-md);
  background: var(--background-surface); border: 1px solid var(--border-default);
  color: var(--text-secondary); min-width: 240px;
}
.text-input input { border: 0; outline: 0; background: transparent; color: var(--text-primary); font: inherit; width: 100%; }

/* ============ Skill modal =========================================== */
.scrim {
  position: fixed; inset: 0; z-index: 60; background: var(--scrim);
  opacity: 0; transition: opacity var(--dur-fast) var(--ease-out);
}
.scrim--show { opacity: 1; }
.modal-wrap {
  position: fixed; inset: 0; z-index: 61; display: grid; place-items: center;
  padding: 24px; overflow-y: auto;
  opacity: 0; transform: scale(0.98); transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.modal-wrap--show { opacity: 1; transform: none; }
.modal {
  width: min(640px, 100%); max-height: calc(100vh - 48px); overflow-y: auto;
  background: var(--background-surface); border: 1px solid var(--border-default);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-lg);
}
.modal__head {
  position: sticky; top: 0; background: var(--background-surface);
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
  padding: 22px 26px 16px; border-bottom: 1px solid var(--border-subtle);
}
.modal__eyebrow { font-size: 13px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--accent-hover); margin-bottom: 5px; }
.modal__title { font-size: 23px; font-weight: 800; }
.modal__meta { font-size: 14.5px; color: var(--text-secondary); margin-top: 3px; }
.modal__body { padding: 20px 26px 26px; display: flex; flex-direction: column; gap: 24px; }
.lede-text { font-size: 17px; font-weight: 300; line-height: 1.6; color: var(--text-primary); margin: 0; }
.block-label { font-size: 13.5px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-secondary); margin-bottom: 12px; }

.field-group { margin-bottom: 18px; }
.field-label { font-size: 13px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-secondary); margin-bottom: 6px; }
.field-text { font-size: 16px; line-height: 1.55; color: var(--text-primary); }

.code-chip {
  display: inline-block; font-size: 14px; padding: 2px 7px; margin: 2px 4px 2px 0;
  background: var(--background-subtle); border: 1px solid var(--border-subtle); border-radius: var(--radius-sm);
  color: var(--text-primary);
}

/* how it works: pipeline */
.flow { display: flex; align-items: stretch; gap: 0; }
.flow-node {
  flex: 1; background: var(--background-subtle); border: 1px solid var(--border-default);
  border-radius: var(--radius-md); padding: 12px; display: flex; flex-direction: column; gap: 6px; min-width: 0;
}
.flow-node--core { background: var(--accent-subtle); border-color: var(--accent-muted); }
.flow-node__icon { width: 24px; height: 24px; border-radius: var(--radius-sm); display: grid; place-items: center; background: var(--background-surface); color: var(--accent-hover); border: 1px solid var(--border-default); }
.flow-node--core .flow-node__icon { background: var(--accent-primary); color: var(--accent-on-accent); border-color: var(--accent-primary); }
.flow-node__title { font-size: 14.5px; font-weight: 700; line-height: 1.3; }
.flow-node__sub { font-size: 13px; color: var(--text-secondary); line-height: 1.4; }
.flow-arrow { flex: none; width: 26px; display: grid; place-items: center; color: var(--border-strong); }
.flow-outputs { display: flex; flex-direction: column; gap: 4px; }
.flow-output { font-size: 12.5px; font-weight: 600; color: var(--accent-hover); background: var(--background-surface); border: 1px solid var(--accent-muted); border-radius: var(--radius-sm); padding: 2px 6px; }

/* how it works: vertical steps */
.steps { display: flex; flex-direction: column; }
.step { display: flex; gap: 12px; padding: 12px 0; border-top: 1px solid var(--border-subtle); }
.step:first-child { border-top: none; padding-top: 0; }
.step__num {
  flex: none; width: 26px; height: 26px; border-radius: 50%;
  background: var(--background-subtle); border: 1px solid var(--border-default);
  display: grid; place-items: center; font-size: 13.5px; font-weight: 700; color: var(--text-secondary); margin-top: 1px;
}
.step--gate .step__num { background: var(--status-error-bg); color: var(--status-error-fg); border-color: transparent; }
.step--confirm .step__num { background: var(--status-warning-bg); color: var(--status-warning-fg); border-color: transparent; }
.step__content { flex: 1; min-width: 0; }
.step__title-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 3px; }
.step__title { font-size: 15.5px; font-weight: 700; }
.step__detail { font-size: 14.5px; color: var(--text-secondary); line-height: 1.5; }
.step-flag { font-size: 12px; font-weight: 700; letter-spacing: 0.03em; text-transform: uppercase; padding: 2px 7px; border-radius: var(--radius-pill); }
.step-flag--gate { background: var(--status-error-bg); color: var(--status-error-fg); }
.step-flag--confirm { background: var(--status-warning-bg); color: var(--status-warning-fg); }

/* try it */
.try-card { border: 1px solid var(--border-default); border-radius: var(--radius-lg); overflow: hidden; }
.try-row { padding: 13px 16px; font-size: 15.5px; line-height: 1.55; }
.try-row--prompt { background: var(--background-subtle); border-bottom: 1px solid var(--border-default); }
.try-tag { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-secondary); margin-bottom: 5px; }
.try-tag--you::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--border-strong); }
.try-tag--result::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent-primary); }
.try-quote { color: var(--text-primary); }

/* out-of-scope callout */
.scope-note {
  display: flex; gap: 10px; align-items: flex-start;
  background: var(--status-info-bg); color: var(--status-info-fg);
  border-radius: var(--radius-md); padding: 11px 13px; font-size: 14.5px; line-height: 1.55;
}
.scope-note a { color: var(--accent2-primary); text-decoration: underline; }

/* technical details disclosure */
details.tech { border: 1px solid var(--border-subtle); border-radius: var(--radius-md); }
details.tech > summary {
  list-style: none; cursor: pointer; padding: 11px 14px; font-size: 14.5px; font-weight: 700;
  color: var(--text-secondary); display: flex; align-items: center; gap: 8px;
}
details.tech > summary::-webkit-details-marker { display: none; }
details.tech > summary .chev { transition: transform var(--dur-fast) var(--ease-out); margin-left: auto; }
details.tech[open] > summary .chev { transform: rotate(180deg); }
.tech-body { padding: 2px 14px 14px; }
.tech-group { margin-bottom: 12px; }
.tech-group:last-child { margin-bottom: 0; }
.tech-group__label { font-size: 12.5px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-secondary); margin-bottom: 6px; }
.code-chip--not { text-decoration: line-through; color: var(--text-secondary); }

/* ============ Accordion (guardrails) ============================== */
.accordion { display: flex; flex-direction: column; gap: 10px; }
.acc-item {
  border: 1px solid var(--border-subtle); border-left: 2px solid var(--accent-primary);
  border-radius: var(--radius-md); background: var(--background-surface); overflow: hidden;
}
.acc-head {
  display: flex; align-items: center; gap: 12px; width: 100%;
  padding: 14px 16px; border: 0; background: transparent; color: var(--text-primary);
  font-size: 17px; font-weight: 600; text-align: left; cursor: pointer;
}
.acc-num { color: var(--accent-primary); font-weight: 800; min-width: 22px; }
.acc-chev { margin-left: auto; color: var(--text-secondary); transition: transform var(--dur-fast) var(--ease-out); }
.acc-item--open .acc-chev { transform: rotate(180deg); }
.acc-body { padding: 0 16px 16px 50px; display: none; }
.acc-item--open .acc-body { display: block; }
.acc-body p { color: var(--text-primary); }
.chip-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 14px; padding: 4px 10px; border-radius: var(--radius-pill); font-weight: 500;
}
.chip--ban { background: var(--status-error-bg); color: var(--status-error-fg); }
.chip--ok { background: var(--status-success-bg); color: var(--status-success-fg); }
.chip--rank-primary { background: var(--accent-subtle); color: var(--accent-darkest); font-weight: 700; }
.chip--rank-secondary { background: var(--background-app); color: var(--text-primary); border: 1px solid var(--border-subtle); }
.chip--rank-rare { background: transparent; color: var(--text-secondary); border: 1px dashed var(--border-default); }
.chip__rank-label { font-weight: 700; }

.kv-table { display: flex; flex-direction: column; border: 1px solid var(--border-default); border-radius: var(--radius-md); overflow: hidden; margin-bottom: 8px; }
.kv-table__row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; padding: 10px 14px; font-size: 15px; border-top: 1px solid var(--border-subtle); }
.kv-table__row:first-child { border-top: none; }
.kv-table__row--head { font-weight: 700; color: var(--text-secondary); font-size: 13.5px; text-transform: uppercase; letter-spacing: 0.03em; background: var(--background-subtle); }

/* ============ Brand ================================================ */
.subhead { font-size: 14px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-secondary); margin: 28px 0 12px; }
.swatch-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
.swatch {
  display: flex; align-items: center; gap: 12px; padding: 12px;
  background: var(--background-surface); border: 1px solid var(--border-default); border-radius: var(--radius-lg);
  cursor: pointer; transition: border-color var(--dur-fast) var(--ease-out);
}
.swatch:hover { border-color: var(--border-strong); }
.swatch__chip { width: 40px; height: 40px; border-radius: var(--radius-md); border: 1px solid var(--border-subtle); flex: none; }
.swatch__role { font-size: 15px; font-weight: 600; }
.swatch__hex { font-size: 14px; color: var(--text-secondary); font-family: ui-monospace, monospace; }
.stat-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.claim-list { display: flex; flex-direction: column; gap: 8px; }
.claim {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px;
  background: var(--background-surface); border: 1px solid var(--border-default); border-radius: var(--radius-md);
}
.claim__text { font-size: 16px; }
.claim__verify {
  display: inline-flex; align-items: center; gap: 4px; font-size: 13px; font-weight: 600;
  padding: 2px 8px; border-radius: var(--radius-pill);
  background: var(--status-warning-bg); color: var(--status-warning-fg);
}
.claim__copy { margin-left: auto; }

/* ============ Rules ================================================ */
.two-col { display: grid; gap: 20px; grid-template-columns: 1fr 1fr; }
.rule-panel { background: var(--background-surface); border: 1px solid var(--border-default); border-radius: var(--radius-lg); padding: 20px; }
.rule-section { margin-bottom: 16px; }
.rule-section h4 { color: var(--text-primary); }
.rule-row { display: flex; gap: 8px; font-size: 16px; line-height: 1.5; padding: 4px 0; color: var(--text-primary); }
.rule-row--dont { color: var(--status-error-fg); }
.rule-row__mark { font-weight: 700; flex: none; }
@media (max-width: 760px) { .two-col { grid-template-columns: 1fr; } }

.acc-rules { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 8px 28px; margin: 14px 0 4px; }
.acc-rules .rule-row { padding: 5px 0; align-items: flex-start; }
.acc-rules .rule-row__mark { margin-top: 2px; }

/* ============ MCPs ================================================= */
.mcp-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.mcp-card { padding: 16px; background: var(--background-surface); border: 1px solid var(--border-default); border-radius: var(--radius-lg); }
.mcp-card__name { font-weight: 700; display: flex; align-items: center; gap: 8px; }
.mcp-card__cmd { font-family: ui-monospace, monospace; font-size: 14px; color: var(--text-secondary); margin: 6px 0; word-break: break-all; }
.mcp-card__used { font-size: 14px; color: var(--text-secondary); margin-top: 8px; }

/* ============ Home ================================================= */
.home-hero { padding: 24px 0 28px; max-width: 760px; }
.home-eyebrow { font-size: 14px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-primary); }
.home-title { font-size: clamp(28px, 4vw, 40px); line-height: 1.1; margin: 8px 0 12px; }
.home-lede { font-size: 18px; color: var(--text-secondary); max-width: 60ch; }
.home-hero__cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }

.branch-grid { display: grid; gap: 20px; grid-template-columns: 1fr 1fr; margin: 12px 0 32px; }
.branch-card {
  display: flex; flex-direction: column;
  background: var(--background-surface);
  border: 1px solid var(--border-default); border-radius: var(--radius-xl);
  overflow: hidden; position: relative;
}
.branch-card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; }
.branch-card--lib::before { background: var(--accent-primary); }
.branch-card--learn::before { background: var(--accent2-primary); }
.branch-card__head { display: flex; gap: 16px; padding: 24px 24px 8px; }
.branch-card__badge {
  flex: none; width: 52px; height: 52px; border-radius: var(--radius-lg);
  display: grid; place-items: center;
}
.branch-card--lib .branch-card__badge { background: var(--accent-subtle); color: var(--accent-darkest); }
.branch-card--learn .branch-card__badge { background: var(--accent2-subtle); color: var(--accent2-darkest); }
.branch-card__title { margin: 0 0 4px; font-size: 24px; }
.branch-card__blurb { margin: 0; color: var(--text-secondary); font-size: 16px; }

.branch-card__links { display: flex; flex-direction: column; padding: 12px; gap: 2px; margin-top: 8px; }
.branch-link {
  display: flex; align-items: center; gap: 12px; width: 100%; text-align: left;
  padding: 11px 12px; border: 0; background: transparent; border-radius: var(--radius-md);
  color: var(--text-primary); cursor: pointer; transition: background var(--dur-fast) var(--ease-out);
}
.branch-link:hover { background: var(--background-subtle); }
.branch-link__icon { flex: none; display: grid; place-items: center; width: 32px; height: 32px; border-radius: var(--radius-md); background: var(--background-subtle); }
.branch-card--lib .branch-link:hover .branch-link__icon { color: var(--accent-primary); }
.branch-card--learn .branch-link:hover .branch-link__icon { color: var(--accent2-primary); }
.branch-link__text { display: flex; flex-direction: column; }
.branch-link__label { font-weight: 600; font-size: 16px; }
.branch-link__desc { font-size: 14px; color: var(--text-secondary); }
.branch-link__arrow { margin-left: auto; color: var(--text-secondary); }

.branch-card__cta {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  margin: auto 16px 16px; padding: 11px; border-radius: var(--radius-md);
  font-weight: 600; font-size: 16px; cursor: pointer; border: 1px solid transparent;
  transition: background var(--dur-fast) var(--ease-out);
}
.branch-card--lib .branch-card__cta { background: var(--accent-primary); color: var(--text-on-accent); }
.branch-card--lib .branch-card__cta:hover { background: var(--accent-hover); }
.branch-card--learn .branch-card__cta { background: var(--accent2-subtle); color: var(--accent2-darkest); border-color: var(--accent2-primary); }
.branch-card--learn .branch-card__cta:hover { background: var(--accent2-primary); color: var(--text-on-accent); }

.home-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--border-subtle); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl); overflow: hidden; margin-bottom: 36px;
}
.home-stat { background: var(--background-surface); padding: 22px 16px; text-align: center; }
.home-stat__value { display: block; font-size: 34px; font-weight: 800; color: var(--accent-primary); line-height: 1; }
.home-stat__label { display: block; font-size: 15px; color: var(--text-secondary); margin-top: 6px; }

.home-section-h { font-size: 20px; margin-bottom: 14px; }

/* code/command blocks (Install section) */
.codeblock { position: relative; margin: 10px 0; }
.codeblock pre {
  margin: 0; padding: 12px 38px 12px 12px;
  background: var(--background-subtle); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); overflow-x: auto;
}
.codeblock code { color: var(--text-primary); white-space: pre; font-size: 14px; line-height: 1.5; }
.codeblock__copy { position: absolute; top: 6px; right: 6px; width: 28px; height: 28px; color: var(--text-secondary); }

@media (max-width: 860px) { .branch-grid { grid-template-columns: 1fr; } .home-stats { grid-template-columns: repeat(2, 1fr); } }

/* ============ Search overlay ======================================= */
.search-overlay { position: fixed; inset: 0; z-index: 80; background: var(--scrim); display: flex; justify-content: center; align-items: flex-start; padding: 10vh 16px 16px; }
.search-box { width: min(640px, 100%); background: var(--background-surface); border: 1px solid var(--border-default); border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); overflow: hidden; max-height: 70vh; display: flex; flex-direction: column; }
.search-box__input { display: flex; align-items: center; gap: 10px; padding: 16px 18px; border-bottom: 1px solid var(--border-subtle); }
.search-box__input input { flex: 1; border: 0; outline: 0; background: transparent; font: inherit; font-size: 18px; color: var(--text-primary); }
.search-results { overflow-y: auto; padding: 8px; }
.search-group__label { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-secondary); padding: 10px 10px 4px; }
.search-result { display: flex; align-items: center; gap: 10px; width: 100%; padding: 10px; border: 0; background: transparent; border-radius: var(--radius-md); text-align: left; cursor: pointer; color: var(--text-primary); }
.search-result:hover, .search-result--active { background: var(--background-subtle); }
.search-result__title { font-weight: 600; font-size: 16px; }
.search-result__preview { font-size: 14px; color: var(--text-secondary); }
.search-result__tag { margin-left: auto; font-size: 13px; padding: 2px 8px; border-radius: var(--radius-pill); background: var(--accent-subtle); color: var(--accent-darkest); flex: none; }
.search-empty { padding: 28px; text-align: center; color: var(--text-secondary); }

/* ============ Toast ================================================ */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(12px);
  z-index: 90; padding: 10px 16px; border-radius: var(--radius-pill);
  background: var(--text-primary); color: var(--background-app);
  font-size: 15px; font-weight: 500; box-shadow: var(--shadow-md);
  opacity: 0; pointer-events: none; transition: opacity var(--dur-fast), transform var(--dur-fast);
}
.toast--show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============ Role view ============================================ */
.role-block { background: var(--background-surface); border: 1px solid var(--border-default); border-radius: var(--radius-lg); padding: 20px; margin-top: 16px; }
.role-block__cluster { font-size: 13px; font-weight: 600; color: var(--accent2-primary); margin-bottom: 6px; }
.comparator { font-style: italic; color: var(--text-secondary); font-size: 14.5px; margin: 10px 0 0; }

.pill-cluster { margin-bottom: 18px; }
.toolbar-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 4px; }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: var(--radius-md);
  border: 1px solid var(--border-default); background: var(--background-surface); color: var(--text-primary);
  font-size: 14.5px; font-weight: 600;
}
.btn-ghost:hover { background: var(--background-subtle); }
.btn-ghost--on { background: var(--accent-primary); border-color: var(--accent-primary); color: var(--text-on-accent); }

.compare-panel {
  background: var(--background-surface); border: 1px solid var(--border-default); border-radius: var(--radius-lg);
  padding: 16px 18px; margin-bottom: 20px; overflow-x: auto;
}
.matrix { display: grid; grid-template-columns: 168px repeat(3, 1fr); min-width: 560px; }
.matrix__cell { padding: 10px 12px; border-top: 1px solid var(--border-subtle); display: flex; align-items: center; }
.matrix__cell--head {
  font-size: 12.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em;
  color: var(--text-secondary); border-top: 0; padding-bottom: 12px;
}
.matrix__role { font-weight: 600; font-size: 14.5px; }

/* ============ Practice Hubs ======================================= */
/* One Galaxy accent per Navigator, exposed as --pa. */
.pa-agentic { --pa: #ff6b35; }
.pa-arm     { --pa: #8b5cf6; }
.pa-service { --pa: #00b4d8; }
.pa-aws     { --pa: #2563eb; }
.pa-data    { --pa: #10b981; }

.practice-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(248px, 1fr));
}
.practice-card {
  display: flex; flex-direction: column; gap: 10px; padding: 18px; text-align: left;
  background: var(--background-surface);
  border: 1px solid var(--border-default); border-radius: var(--radius-lg);
  border-top: 3px solid var(--pa, var(--accent-primary));
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.practice-card:hover { background: var(--background-subtle); transform: translateY(-2px); }
.practice-card__badge {
  width: 44px; height: 44px; flex: none; border-radius: var(--radius-md);
  display: grid; place-items: center;
  color: var(--pa, var(--accent-primary));
  background: color-mix(in srgb, var(--pa, var(--accent-primary)) 14%, transparent);
}
.practice-card__name { font-weight: 700; font-size: 18px; }
.practice-card__blurb { font-size: 15px; color: var(--text-secondary); line-height: 1.45; }
.practice-card__meta {
  margin-top: auto; font-size: 14px; font-weight: 600;
  color: var(--pa, var(--accent-primary)); display: flex; align-items: center; gap: 6px;
}

.practice-hero {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 4px 0 4px 16px; border-left: 3px solid var(--pa, var(--accent-primary));
  margin-bottom: 6px;
}
.practice-hero__badge {
  flex: none; width: 52px; height: 52px; border-radius: var(--radius-lg);
  display: grid; place-items: center;
  color: var(--pa, var(--accent-primary));
  background: color-mix(in srgb, var(--pa, var(--accent-primary)) 14%, transparent);
}
.practice-hero h1 { margin: 0 0 4px; }
.practice-scaffold {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 12px 14px; margin: 16px 0 8px;
  background: var(--status-warning-bg); color: var(--status-warning-fg);
  border-radius: var(--radius-md); font-size: 15px; line-height: 1.5;
}
.practice-cat { margin-top: 24px; }

/* ============ Responsive ========================================== */
@media (max-width: 1023px) { .card-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); } }
@media (max-width: 767px) {
  .topbar__search-label, .topbar__search kbd { display: none; }
  .topbar__search { min-width: 0; }
  .topbar__hamburger { display: grid; }
  .topbar__nav {
    display: none; position: absolute; top: 56px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0; padding: 8px;
    background: var(--background-surface); border-bottom: 1px solid var(--border-subtle); box-shadow: var(--shadow-md);
  }
  .topbar__nav--open { display: flex; }
  .card-grid { grid-template-columns: 1fr; }
}