/* ProtoMap — full-width Carbon shell · Google Blue · responsive */

:root {
  /*
   * Brand system from AgentStylus (ColorPalette) suggestFromSeed("#1A73E8", { industry: "saas" })
   * strategy: auto — Secondary indigo, Accent cyan, Soft warm peach, Deep burgundy
   */
  --g-blue: #1a73e8;           /* Primary (Google Blue) — CTAs / header only */
  --g-blue-bright: #4285f4;
  --g-blue-dark: #0b60cb;      /* themes.light.primary */
  --g-blue-hover: #0c4999;     /* themes.light.primaryHover */
  --g-blue-soft: #d7e9ff;      /* themes.light.primarySoft — use sparingly */

  --as-secondary: #42338f;     /* indigo — nav accent, kickers, secondary UI */
  --as-secondary-soft: #e5e5fc;
  --as-secondary-muted: #6057af;
  --as-tertiary: #52b7dc;      /* cyan — diagrams, chips, tertiary accents */
  --as-tertiary-soft: #d9ebf4;
  --as-tertiary-deep: #007191;
  --as-soft: #f4c4a6;          /* warm peach — rare highlight, not chrome */
  --as-soft-bg: #fff6ef;
  --as-deep: #670020;          /* deep burgundy — severe/deep only */

  --g-white: #ffffff;
  --g-grey-50: #f2f5f9;        /* AgentStylus neutrals (brand-tinted) */
  --g-grey-100: #e4e8ef;
  --g-grey-200: #cfd5dd;
  --g-grey-600: #606770;
  --g-grey-700: #606770;
  --g-grey-900: #1f2226;

  /* Carbon spacing */
  --cds-spacing-01: 0.125rem;
  --cds-spacing-02: 0.25rem;
  --cds-spacing-03: 0.5rem;
  --cds-spacing-04: 0.75rem;
  --cds-spacing-05: 1rem;
  --cds-spacing-06: 1.5rem;
  --cds-spacing-07: 2rem;
  --cds-spacing-08: 2.5rem;
  --cds-spacing-09: 3rem;
  --cds-spacing-10: 4rem;

  /* Carbon UI Shell */
  --cds-header-h: 3rem;
  --cds-sidenav-w: 16rem;
  --page-pad-x: var(--cds-spacing-07);
  --page-pad-y: var(--cds-spacing-07);

  /* Carbon productive type (16px root) */
  --cds-label-01: 0.75rem;
  --cds-helper-text-01: 0.75rem;
  --cds-caption-01: 0.75rem;
  --cds-body-compact-01: 0.875rem;
  --cds-body-01: 0.875rem;
  --cds-body-02: 1rem;
  --cds-heading-compact-01: 0.875rem;
  --cds-heading-01: 0.875rem;
  --cds-heading-02: 1rem;
  --cds-heading-03: 1.25rem;
  --cds-heading-04: 1.75rem;
  --cds-heading-05: 2rem;
  --cds-heading-06: 2.625rem;

  --font-size-sm: var(--cds-label-01);
  --font-size-base: var(--cds-body-compact-01);
  --font-size-lg: var(--cds-body-02);
  --font-size-xl: var(--cds-heading-04);
  --font-size-h2: var(--cds-heading-03);

  --ink: var(--g-grey-900);
  --ink-soft: var(--g-grey-700);
  --muted: var(--g-grey-600);
  --line: var(--g-grey-200);
  --line-soft: var(--g-grey-100);
  --paper: var(--g-grey-50);
  --paper-2: var(--g-grey-100);
  --surface: var(--g-white);
  --brand: var(--g-blue);
  --accent: var(--as-tertiary);       /* cyan accent, not more blue */
  --accent-soft: var(--as-tertiary-soft);
  --secondary: var(--as-secondary);
  --secondary-soft: var(--as-secondary-soft);
  --warn: #e37400;
  --danger: #ae3534;                  /* AgentStylus themes.light.danger */
  --success: #067c21;
  --svc: var(--as-secondary);
  --msg: var(--success);
  --enm: var(--warn);
  --fld: var(--g-grey-700);
  --shadow: 0 1px 2px rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
  --radius: 0;
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --topbar-h: var(--cds-header-h);
  color-scheme: light;
}

[data-theme="dark"] {
  --ink: #e8eaed;
  --ink-soft: #bdc1c6;
  --muted: #9aa0a6;
  --line: #3c4043;
  --line-soft: #303134;
  --paper: #202124;
  --paper-2: #292a2d;
  --surface: #292a2d;
  --brand: var(--g-blue-bright);
  --accent: #7ec8e8;                 /* cyan tertiary lift */
  --accent-soft: #1a3a48;
  --secondary: #a8a0e0;
  --secondary-soft: #2a2648;
  --as-secondary: #a8a0e0;
  --as-secondary-soft: #2a2648;
  --as-secondary-muted: #b8b0ef;
  --as-tertiary: #7ec8e8;
  --as-tertiary-soft: #1a3a48;
  --warn: #fdd663;
  --danger: #f28b82;
  --svc: #a8a0e0;                    /* indigo, not more blue */
  --msg: #81c995;
  --enm: #fdd663;
  --fld: #bdc1c6;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
  --g-white: #292a2d;
  --g-grey-50: #202124;
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  margin: 0;
  font-size: 100%; /* 16px → Carbon rem tokens resolve correctly */
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font);
  font-size: var(--cds-body-compact-01); /* 14px Carbon UI default */
  line-height: 1.42857; /* Carbon body-compact-01 */
  letter-spacing: 0.16px;
  color: var(--ink);
  background: var(--paper);
}

a {
  color: var(--as-secondary-muted);
  text-decoration: none;
}
a:hover {
  color: var(--as-secondary);
  text-decoration: underline;
}

code,
kbd,
pre,
.mono {
  font-family: var(--mono);
  font-size: 0.92em;
}

kbd {
  display: inline-block;
  padding: 0.12em 0.45em;
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--g-blue);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 10000;
}
.skip-link:focus {
  left: 0;
}

/* ——— Header (Proto Viewer tools) ——— */
.cds-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--cds-header-h);
  display: flex;
  align-items: stretch;
  background: var(--g-blue);
  color: #fff;
  z-index: 8000;
  gap: 0;
}

.cds-header__menu-btn {
  flex: 0 0 auto;
  width: var(--cds-header-h);
  border: 0;
  background: transparent;
  color: #fff;
  cursor: pointer;
  display: grid;
  place-items: center;
}
.cds-header__menu-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

.cds-header__name {
  display: inline-flex;
  align-items: center;
  gap: var(--cds-spacing-03);
  padding-inline: var(--cds-spacing-04) var(--cds-spacing-05);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: var(--cds-body-compact-01);
  line-height: 1.28572;
  white-space: nowrap;
}
.cds-header__name:hover {
  text-decoration: none;
  background: rgba(255, 255, 255, 0.08);
}
.cds-header__name span {
  font-weight: 400;
  opacity: 0.9;
  font-size: var(--cds-label-01);
}

.cds-header__tools {
  display: flex;
  align-items: stretch;
  margin-left: auto;
  position: relative;
  min-width: 0;
  flex: 1 1 auto;
  justify-content: flex-end;
  flex-wrap: nowrap;
}

.cds-header__tool {
  border: 0;
  background: transparent;
  color: #fff;
  font-family: var(--font);
  font-size: var(--cds-body-compact-01);
  font-weight: 400;
  line-height: 1.28572;
  letter-spacing: 0.16px;
  padding: 0 var(--cds-spacing-05);
  cursor: pointer;
  white-space: nowrap;
  opacity: 0.95;
}
.cds-header__tool:hover,
.cds-header__tool:focus-visible {
  background: rgba(255, 255, 255, 0.16);
  opacity: 1;
  outline: none;
}

.cds-header__overflow {
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 10rem;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  z-index: 8100;
  flex-direction: column;
}
/* Critical: do not let display:flex override the hidden attribute */
.cds-header__overflow:not([hidden]) {
  display: flex;
}
.cds-header__overflow[hidden] {
  display: none !important;
}

.cds-header__overflow-item {
  border: 0;
  background: transparent;
  text-align: left;
  padding: var(--cds-spacing-04) var(--cds-spacing-05);
  font-family: var(--font);
  font-size: var(--cds-body-compact-01);
  color: var(--ink);
  cursor: pointer;
}
.cds-header__overflow-item:hover {
  background: var(--as-secondary-soft);
  color: var(--as-secondary);
}

/* Narrow: collapse tool buttons into More */
@media (max-width: 42rem) {
  .cds-header__tools[data-compact="true"] .cds-header__tool:not(.cds-header__tool--more) {
    display: none;
  }
  .cds-header__tools[data-compact="true"] .cds-header__tool--more {
    display: inline-flex;
    align-items: center;
  }
}

.cds-header__tool--more[hidden] {
  display: none !important;
}

/* ——— Shell ——— */
.cds-shell {
  display: flex;
  padding-top: var(--cds-header-h);
  min-height: 100dvh;
  width: 100%;
}

.cds-sidenav {
  position: fixed;
  top: var(--cds-header-h);
  left: 0;
  bottom: 0;
  width: var(--cds-sidenav-w);
  max-width: 85vw;
  background: var(--surface);
  border-right: 1px solid var(--line);
  overflow: auto;
  z-index: 7000;
  transition: transform 0.18s ease;
}

.cds-sidenav[data-collapsed="true"] {
  transform: translateX(-105%);
}

.cds-sidenav__label {
  padding: var(--cds-spacing-05) var(--cds-spacing-05) var(--cds-spacing-03);
  font-size: var(--cds-label-01);
  font-weight: 600;
  letter-spacing: 0.32px;
  line-height: 1.33333;
  text-transform: uppercase;
  color: var(--muted);
}

.cds-sidenav__link {
  display: flex;
  align-items: center;
  gap: var(--cds-spacing-04);
  width: 100%;
  min-height: 2rem;
  padding: var(--cds-spacing-03) var(--cds-spacing-05);
  border: 0;
  border-left: 3px solid transparent;
  background: transparent;
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--cds-body-compact-01);
  font-weight: 400;
  line-height: 1.28572;
  letter-spacing: 0.16px;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}
.cds-sidenav__link:hover {
  background: var(--as-secondary-soft);
  text-decoration: none;
  color: var(--as-secondary);
}
.cds-sidenav__link[aria-current="page"] {
  background: var(--as-secondary-soft);
  border-left-color: var(--as-secondary);
  color: var(--as-secondary);
  font-weight: 600;
}
.cds-sidenav__link .nav-icon {
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
}

.cds-content {
  flex: 1;
  margin-left: var(--cds-sidenav-w);
  min-width: 0;
  width: 100%;
  background: var(--paper);
}

body.nav-collapsed .cds-content {
  margin-left: 0;
}
body.nav-collapsed .cds-sidenav {
  transform: translateX(-105%);
}

@media (max-width: 42rem) {
  :root {
    --page-pad-x: var(--cds-spacing-04);
    --page-pad-y: var(--cds-spacing-05);
  }
  .stack-strip {
    grid-template-columns: 1fr;
  }
  .stack-strip div {
    border-inline-end: 0;
    border-block-end: 1px solid var(--line);
  }
  .stack-strip div:last-child {
    border-block-end: 0;
  }
  .home-hero .cds-btn--tertiary {
    margin-inline-start: 0;
  }
  .home-hero__actions {
    flex-direction: column;
    align-items: stretch;
  }
  .home-hero__actions .cds-btn {
    width: 100%;
  }
  #page-viewer .welcome {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-block: var(--cds-spacing-06);
  }
}

@media (max-width: 56rem) {
  .cds-content {
    margin-left: 0;
  }
  .cds-sidenav {
    box-shadow: var(--shadow);
  }
}

.cds-sidenav-backdrop {
  display: none;
  position: fixed;
  inset: var(--cds-header-h) 0 0 0;
  background: rgba(32, 33, 36, 0.35);
  z-index: 6999;
  border: 0;
  padding: 0;
  cursor: pointer;
}
body:not(.nav-collapsed) .cds-sidenav-backdrop.is-active {
  display: block;
}

.page {
  display: none;
  width: 100%;
  min-height: calc(100dvh - var(--cds-header-h));
}
.page.active {
  display: block;
}

/* ——— Home / learn shared ——— */
.home,
.learn-layout,
.learn {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: var(--page-pad-y) var(--page-pad-x);
}

.home-hero {
  /* Full-bleed within padded .home: width:auto + equal negative margins
     (width:100% + negative margins leaves a gap on the trailing edge). */
  width: auto;
  max-width: none;
  background: linear-gradient(135deg, var(--g-blue) 0%, var(--as-secondary) 100%);
  color: #fff;
  padding-block: clamp(1.75rem, 4vw, 3rem);
  padding-inline: var(--page-pad-x);
  margin-block: calc(-1 * var(--page-pad-y)) var(--cds-spacing-07);
  margin-inline: calc(-1 * var(--page-pad-x));
}
.home-hero h1 {
  margin: 0 0 var(--cds-spacing-04);
  padding: 0;
  font-size: clamp(1.35rem, 4.5vw, 1.75rem);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.25;
  text-wrap: balance;
}
.home-hero p {
  margin: 0 0 var(--cds-spacing-06);
  padding: 0;
  max-width: 42rem;
  font-size: var(--cds-body-02);
  line-height: 1.5;
  letter-spacing: 0;
  opacity: 0.96;
}
.home-hero .cds-btn--primary {
  background: #fff;
  color: var(--as-secondary);
}
.home-hero .cds-btn--primary:hover {
  background: var(--as-soft-bg);
}
.home-hero .cds-btn--tertiary {
  border-color: #fff;
  color: #fff;
  margin-inline-start: 0.5rem;
}
.home-hero .cds-btn--tertiary:hover {
  background: rgba(255, 255, 255, 0.15);
}
.home-hero .home-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--cds-spacing-03);
}
.home-hero .home-hero__actions .cds-btn--tertiary {
  margin-inline-start: 0;
}

.stack-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: 0;
  width: 100%;
  border-block: 1px solid var(--line);
  margin: 1.5rem 0;
}
.stack-strip div {
  padding: 1.15rem 1.25rem;
  background: var(--surface);
  border-inline-end: 1px solid var(--line);
}
.stack-strip div:last-child {
  border-inline-end: 0;
}
.stack-strip strong {
  display: block;
  color: var(--as-secondary);
  font-size: var(--cds-label-01);
  letter-spacing: 0.32px;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: clamp(0.75rem, 2vw, 1.25rem);
  margin: 1.25rem 0;
  width: 100%;
}

.cds-tile {
  background: transparent;
  border: 0;
  border-block-start: 3px solid var(--as-tertiary);
  padding: 1rem 0 1.25rem;
  margin: 0;
}
.cds-tile--clickable {
  cursor: pointer;
  transition: color 0.12s;
}
.cds-tile--clickable:hover h3 {
  color: var(--as-secondary);
}
[data-theme="dark"] .tile-grid h3 {
  color: var(--as-tertiary);
}

.cds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--cds-spacing-03);
  min-height: 2.5rem; /* Carbon button md */
  padding: 0 var(--cds-spacing-05);
  border: 1px solid transparent;
  font-family: var(--font);
  font-size: var(--cds-body-compact-01);
  font-weight: 400;
  letter-spacing: 0.16px;
  line-height: 1.28572;
  cursor: pointer;
  text-decoration: none;
}
.cds-btn:hover {
  text-decoration: none;
}
.cds-btn--primary {
  background: var(--g-blue);
  color: #fff;
}
.cds-btn--primary:hover {
  background: var(--g-blue-hover);
}
.cds-btn--tertiary {
  background: transparent;
  color: var(--as-secondary);
  border-color: var(--as-secondary);
}
.cds-btn--tertiary:hover {
  background: var(--as-secondary-soft);
}
.cds-btn--ghost {
  background: transparent;
  color: var(--as-secondary);
}
.cds-btn--ghost:hover {
  background: var(--as-secondary-soft);
}

.mermaid-wrap {
  background: var(--surface);
  border-block: 1px solid var(--line);
  padding: clamp(1rem, 2vw, 1.5rem);
  margin: 1.25rem 0;
  overflow-x: auto;
  width: 100%;
}
.mermaid-wrap .mermaid {
  display: flex;
  justify-content: center;
}

.callout {
  border-inline-start: 4px solid var(--as-tertiary);
  background: var(--as-tertiary-soft);
  padding: clamp(0.85rem, 2.5vw, 1.1rem) clamp(0.9rem, 2.5vw, 1.15rem);
  margin: 1.15rem 0;
  color: var(--ink);
  font-size: 1.02em;
  overflow-wrap: anywhere;
}
[data-theme="dark"] .callout {
  background: rgba(82, 183, 220, 0.15);
}

/* Base table-wrap; learn.css owns mobile card transform */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1rem 0;
  width: 100%;
  max-width: 100%;
  border-block: 1px solid var(--line);
}

.learn pre.code {
  background: var(--g-grey-900);
  color: #e8eaed;
  padding: 1.15rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  font-size: 0.95em;
  line-height: 1.5;
  width: 100%;
  max-width: 100%;
}

.learn-pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
  width: 100%;
}

.home-section-title {
  margin: 0 0 var(--cds-spacing-04);
  font-size: var(--cds-heading-03);
  font-weight: 400;
}

.tile-grid h3 {
  margin: 0 0 var(--cds-spacing-02);
  font-size: var(--cds-heading-02);
  font-weight: 600;
  color: var(--as-secondary);
}
.tile-grid p {
  margin: 0;
  font-size: var(--cds-body-01);
  color: var(--ink-soft);
}
#page-viewer .viewer-root,
#page-viewer .app {
  width: 100%;
  min-height: calc(100dvh - var(--cds-header-h));
}
#page-viewer .topbar {
  display: none;
}
#page-viewer .welcome {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  padding: var(--page-pad-y) var(--page-pad-x);
  width: 100%;
  min-height: calc(100dvh - var(--cds-header-h));
}
#page-viewer .welcome-inner,
#page-viewer .welcome-dropzone {
  width: 100%;
  max-width: none;
}
#page-viewer .welcome-title {
  font-size: var(--cds-heading-04);
  max-width: none;
}
#page-viewer .welcome-lede {
  font-size: var(--cds-body-02);
  max-width: 40rem;
}
#page-viewer .welcome-brand {
  font-size: var(--cds-heading-03);
}
#page-viewer .btn.primary,
#page-viewer .btn.primary:hover {
  background: var(--g-blue);
  border-color: var(--g-blue);
  color: #fff;
}
#page-viewer .welcome-brand {
  color: var(--as-secondary);
  font-size: 1em;
}
#page-viewer .workspace {
  width: 100%;
  height: calc(100dvh - var(--cds-header-h));
}