/* Cloud Alter Brand Design System — Version 2.2 */
@layer tokens, themes, typography, components, utilities, print;

@layer tokens {
  :root {
    color-scheme: light dark;

    /* Typography & Layout Scale */
    --font-sans: Geist, "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-24: 6rem;

    --radius-legacy: 4px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 28px;
    --radius-pill: 999px;

    /* Architectural Coordinate Grid */
    --grid-cell: 2.25rem;
    --grid-line-light: rgba(33, 92, 168, 0.055);
    --grid-line-dark: rgba(114, 174, 245, 0.075);

    /* Fixed Brand Primitives */
    --paper: #FFFFFF;
    --midnight: #0A1730;
    --on-midnight: #F1F5FB;
    --on-midnight-muted: #9FB0C7;
    --on-midnight-link: #72AEF5;

    /* Light / Dark Pairs */
    --surface-light: #F4F7FC;
    --surface-dark: #070B14;
    --surface-raised-light: #FFFFFF;
    --surface-raised-dark: #0E1626;
    --surface-sunken-light: #E8EDF5;
    --surface-sunken-dark: #04070D;

    --ink-light: #0D1524;
    --ink-dark: #F1F5FB;
    --ink-muted-light: #47586E;
    --ink-muted-dark: #9FB0C7;

    --brand-light: #2668BA;
    --brand-dark: #2668BA;
    --brand-hover-light: #1E559B;
    --brand-hover-dark: #2F73C8;
    --brand-active-light: #17447D;
    --brand-active-dark: #1E559B;
    --on-brand: #FFFFFF;
    --brand-text-light: #215CA8;
    --brand-text-dark: #72AEF5;
    --brand-tint-light: #E6EFFB;
    --brand-tint-dark: #11223E;

    --accent-light: #F58000;
    --accent-dark: #F58000;
    --accent-hover-light: #E07000;
    --accent-hover-dark: #FF941F;
    --accent-active-light: #CE6500;
    --accent-active-dark: #E07000;
    --on-accent: #0D1524;
    --accent-graphic-light: #D66200;
    --accent-graphic-dark: #F58000;
    --accent-text-light: #AA4600;
    --accent-text-dark: #FFA438;
    --accent-tint-light: #FFF2E2;
    --accent-tint-dark: #301D08;

    --border-light: #DCE5F2;
    --border-dark: #1C2A44;
    --border-strong-light: #687A96;
    --border-strong-dark: #62789C;

    --success-light: #0D726A;
    --success-dark: #3CCFC0;
    --success-tint-light: #E3F5F3;
    --success-tint-dark: #0A2B29;

    --warning-light: #945800;
    --warning-dark: #F5BA42;
    --warning-tint-light: #FEF3DC;
    --warning-tint-dark: #2E2107;

    --danger-light: #B42318;
    --danger-dark: #FF8A7A;
    --danger-tint-light: #FEECEB;
    --danger-tint-dark: #331210;

    --focus-ring-light: #215CA8;
    --focus-ring-dark: #72AEF5;

    --shadow-sm-light: 0 1px 2px rgba(13, 21, 36, 0.06), 0 1px 1px rgba(13, 21, 36, 0.04);
    --shadow-sm-dark: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md-light: 0 12px 32px -8px rgba(13, 21, 36, 0.16), 0 2px 6px rgba(13, 21, 36, 0.06);
    --shadow-md-dark: 0 16px 40px -8px rgba(0, 0, 0, 0.7);
  }

  @supports (color: color(display-p3 1 1 1)) {
    :root {
      --brand-light: color(display-p3 0.188 0.405 0.710);
      --brand-dark: color(display-p3 0.188 0.405 0.710);
      --accent-light: color(display-p3 0.916 0.522 0.138);
      --accent-dark: color(display-p3 0.916 0.522 0.138);
      --accent-graphic-light: color(display-p3 0.801 0.408 0.102);
      --accent-graphic-dark: color(display-p3 0.916 0.522 0.138);
    }
  }
}

@layer themes {
  /* Default Light Tokens + Fallback for browsers without light-dark() */
  :root {
    --surface: var(--surface-light);
    --surface-raised: var(--surface-raised-light);
    --surface-sunken: var(--surface-sunken-light);
    --ink: var(--ink-light);
    --ink-muted: var(--ink-muted-light);
    --brand: var(--brand-light);
    --brand-hover: var(--brand-hover-light);
    --brand-active: var(--brand-active-light);
    --brand-text: var(--brand-text-light);
    --brand-tint: var(--brand-tint-light);
    --accent: var(--accent-light);
    --accent-hover: var(--accent-hover-light);
    --accent-active: var(--accent-active-light);
    --accent-graphic: var(--accent-graphic-light);
    --accent-text: var(--accent-text-light);
    --accent-tint: var(--accent-tint-light);
    --border: var(--border-light);
    --border-strong: var(--border-strong-light);
    --success: var(--success-light);
    --success-tint: var(--success-tint-light);
    --warning: var(--warning-light);
    --warning-tint: var(--warning-tint-light);
    --danger: var(--danger-light);
    --danger-tint: var(--danger-tint-light);
    --focus-ring: var(--focus-ring-light);
    --grid-line: var(--grid-line-light);
    --shadow-sm: var(--shadow-sm-light);
    --shadow-md: var(--shadow-md-light);
    accent-color: var(--brand);
  }

  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --surface: var(--surface-dark);
      --surface-raised: var(--surface-raised-dark);
      --surface-sunken: var(--surface-sunken-dark);
      --ink: var(--ink-dark);
      --ink-muted: var(--ink-muted-dark);
      --brand: var(--brand-dark);
      --brand-hover: var(--brand-hover-dark);
      --brand-active: var(--brand-active-dark);
      --brand-text: var(--brand-text-dark);
      --brand-tint: var(--brand-tint-dark);
      --accent: var(--accent-dark);
      --accent-hover: var(--accent-hover-dark);
      --accent-active: var(--accent-active-dark);
      --accent-graphic: var(--accent-graphic-dark);
      --accent-text: var(--accent-text-dark);
      --accent-tint: var(--accent-tint-dark);
      --border: var(--border-dark);
      --border-strong: var(--border-strong-dark);
      --success: var(--success-dark);
      --success-tint: var(--success-tint-dark);
      --warning: var(--warning-dark);
      --warning-tint: var(--warning-tint-dark);
      --danger: var(--danger-dark);
      --danger-tint: var(--danger-tint-dark);
      --focus-ring: var(--focus-ring-dark);
      --grid-line: var(--grid-line-dark);
      --shadow-sm: var(--shadow-sm-dark);
      --shadow-md: var(--shadow-md-dark);
    }
  }

  @supports (color: light-dark(white, black)) {
    :root {
      --surface: light-dark(var(--surface-light), var(--surface-dark));
      --surface-raised: light-dark(var(--surface-raised-light), var(--surface-raised-dark));
      --surface-sunken: light-dark(var(--surface-sunken-light), var(--surface-sunken-dark));
      --ink: light-dark(var(--ink-light), var(--ink-dark));
      --ink-muted: light-dark(var(--ink-muted-light), var(--ink-muted-dark));
      --brand: light-dark(var(--brand-light), var(--brand-dark));
      --brand-hover: light-dark(var(--brand-hover-light), var(--brand-hover-dark));
      --brand-active: light-dark(var(--brand-active-light), var(--brand-active-dark));
      --brand-text: light-dark(var(--brand-text-light), var(--brand-text-dark));
      --brand-tint: light-dark(var(--brand-tint-light), var(--brand-tint-dark));
      --accent: light-dark(var(--accent-light), var(--accent-dark));
      --accent-hover: light-dark(var(--accent-hover-light), var(--accent-hover-dark));
      --accent-active: light-dark(var(--accent-active-light), var(--accent-active-dark));
      --accent-graphic: light-dark(var(--accent-graphic-light), var(--accent-graphic-dark));
      --accent-text: light-dark(var(--accent-text-light), var(--accent-text-dark));
      --accent-tint: light-dark(var(--accent-tint-light), var(--accent-tint-dark));
      --border: light-dark(var(--border-light), var(--border-dark));
      --border-strong: light-dark(var(--border-strong-light), var(--border-strong-dark));
      --success: light-dark(var(--success-light), var(--success-dark));
      --success-tint: light-dark(var(--success-tint-light), var(--success-tint-dark));
      --warning: light-dark(var(--warning-light), var(--warning-dark));
      --warning-tint: light-dark(var(--warning-tint-light), var(--warning-tint-dark));
      --danger: light-dark(var(--danger-light), var(--danger-dark));
      --danger-tint: light-dark(var(--danger-tint-light), var(--danger-tint-dark));
      --focus-ring: light-dark(var(--focus-ring-light), var(--focus-ring-dark));
      --grid-line: light-dark(var(--grid-line-light), var(--grid-line-dark));
    }
  }

  /* Explicit manual theme overrides */
  [data-theme="light"] {
    color-scheme: only light;
    --grid-line: var(--grid-line-light);
    --shadow-sm: var(--shadow-sm-light);
    --shadow-md: var(--shadow-md-light);
  }

  [data-theme="dark"] {
    color-scheme: only dark;
    --surface: var(--surface-dark);
    --surface-raised: var(--surface-raised-dark);
    --surface-sunken: var(--surface-sunken-dark);
    --ink: var(--ink-dark);
    --ink-muted: var(--ink-muted-dark);
    --brand: var(--brand-dark);
    --brand-hover: var(--brand-hover-dark);
    --brand-active: var(--brand-active-dark);
    --brand-text: var(--brand-text-dark);
    --brand-tint: var(--brand-tint-dark);
    --accent: var(--accent-dark);
    --accent-hover: var(--accent-hover-dark);
    --accent-active: var(--accent-active-dark);
    --accent-graphic: var(--accent-graphic-dark);
    --accent-text: var(--accent-text-dark);
    --accent-tint: var(--accent-tint-dark);
    --border: var(--border-dark);
    --border-strong: var(--border-strong-dark);
    --success: var(--success-dark);
    --success-tint: var(--success-tint-dark);
    --warning: var(--warning-dark);
    --warning-tint: var(--warning-tint-dark);
    --danger: var(--danger-dark);
    --danger-tint: var(--danger-tint-dark);
    --focus-ring: var(--focus-ring-dark);
    --grid-line: var(--grid-line-dark);
    --shadow-sm: var(--shadow-sm-dark);
    --shadow-md: var(--shadow-md-dark);
  }

  /* Component-scoped Midnight surface (hero bands, footers, dark panels inside light pages) */
  .surface-midnight {
    color-scheme: only dark;
    background-color: var(--midnight);
    color: var(--on-midnight);
    accent-color: var(--on-midnight-link);
    --surface: #0A1730;
    --surface-raised: #112242;
    --surface-sunken: #071022;
    --ink: var(--on-midnight);
    --ink-muted: var(--on-midnight-muted);
    --brand-text: var(--on-midnight-link);
    --focus-ring: var(--on-midnight-link);
    --accent-graphic: var(--accent-graphic-dark);
    --accent-text: var(--accent-text-dark);
    --accent-tint: #2D1F0D;
    --border: #1C2E4F;
    --border-strong: #62789C;
    --grid-line: rgba(114, 174, 245, 0.08);
  }

  @scope (.surface-midnight) {
    a {
      color: var(--on-midnight-link);
    }
    :focus-visible {
      outline-color: var(--on-midnight-link);
    }
  }

  @media (forced-colors: active) {
    :root,
    .surface-midnight {
      --surface: Canvas;
      --surface-raised: Canvas;
      --surface-sunken: Canvas;
      --midnight: Canvas;
      --ink: CanvasText;
      --ink-muted: GrayText;
      --on-midnight: CanvasText;
      --on-midnight-muted: GrayText;
      --brand: Highlight;
      --on-brand: HighlightText;
      --brand-text: LinkText;
      --accent: Highlight;
      --on-accent: HighlightText;
      --accent-graphic: Highlight;
      --accent-text: CanvasText;
      --border: CanvasText;
      --border-strong: ButtonBorder;
      --focus-ring: Highlight;
      --grid-line: transparent;
    }
  }
}

@layer typography {
  body {
    font-family: var(--font-sans);
    background-color: var(--surface);
    color: var(--ink);
    line-height: 1.625;
    text-align: start;
  }

  .display {
    font-family: var(--font-sans);
    font-size: clamp(2.5rem, 1.75rem + 3vw, 4rem);
    line-height: 1.02;
    font-weight: 600;
    letter-spacing: -0.035em;
    text-wrap: balance;
  }

  .h1 {
    font-family: var(--font-sans);
    font-size: clamp(2rem, 1.5rem + 2vw, 3rem);
    line-height: 1.08;
    font-weight: 600;
    letter-spacing: -0.03em;
    text-wrap: balance;
  }

  .h2 {
    font-family: var(--font-sans);
    font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem);
    line-height: 1.1875;
    font-weight: 600;
    letter-spacing: -0.02em;
    text-wrap: balance;
  }

  .h3 {
    font-family: var(--font-sans);
    font-size: 1.375rem;
    line-height: 1.2727;
    font-weight: 600;
    letter-spacing: -0.01em;
    text-wrap: balance;
  }

  .lede {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    line-height: 1.5;
    font-weight: 400;
    text-wrap: pretty;
    max-inline-size: 62ch;
  }

  .body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.625;
    font-weight: 400;
    text-wrap: pretty;
    max-inline-size: 65ch;
  }

  .small {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    line-height: 1.5714;
    font-weight: 400;
  }

  .caption {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    line-height: 1.3333;
    font-weight: 500;
  }

  .figure {
    font-family: var(--font-mono);
    font-size: clamp(1.75rem, 1.35rem + 1.5vw, 2.5rem);
    line-height: 1.1;
    font-weight: 500;
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
  }

  .eyebrow {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.25;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-variant-numeric: tabular-nums;
  }

  .code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5714;
    font-weight: 400;
    font-variant-numeric: tabular-nums;
    overflow-wrap: break-word;
  }
}

@layer components {
  :where(a, button, input, select, textarea, [tabindex]):focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-block-size: 2.75rem;
    padding-block: var(--space-2);
    padding-inline: var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1.25;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease;
  }

  .btn:disabled {
    opacity: 0.52;
    cursor: not-allowed;
  }

  .btn-brand {
    background-color: var(--brand);
    color: var(--on-brand);
    border-color: var(--brand);
  }

  .btn-brand:hover:not(:disabled) {
    background-color: var(--brand-hover);
    border-color: var(--brand-hover);
  }

  .btn-brand:active:not(:disabled) {
    background-color: var(--brand-active);
    border-color: var(--brand-active);
  }

  .btn-accent {
    background-color: var(--accent);
    color: var(--on-accent);
    /* Horizon Orange border preserves 3:1 WCAG 1.4.11 control boundary on light grounds */
    border-color: var(--accent-graphic);
    font-weight: 600;
  }

  .btn-accent:hover:not(:disabled) {
    background-color: var(--accent-hover);
    border-color: var(--accent-text);
  }

  .btn-accent:active:not(:disabled) {
    background-color: var(--accent-active);
  }

  .btn-outline {
    background-color: transparent;
    color: var(--ink);
    border-color: var(--border-strong);
  }

  .btn-outline:hover:not(:disabled) {
    background-color: var(--surface-sunken);
  }

  .input {
    display: block;
    inline-size: 100%;
    min-block-size: 2.75rem;
    padding-block: var(--space-2);
    padding-inline: var(--space-3);
    background-color: var(--surface-raised);
    color: var(--ink);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.5;
  }

  .input::placeholder {
    color: var(--ink-muted);
  }

  .card {
    background-color: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
  }

  .card-lift {
    box-shadow: var(--shadow-sm);
  }

  /* Delta Component: before -> after metric proof */
  .delta {
    display: inline-flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: var(--space-2);
    font-family: var(--font-mono);
    font-variant-numeric: tabular-nums;
  }

  .delta-before {
    color: var(--ink-muted);
    text-decoration: line-through;
    text-decoration-thickness: 1.5px;
  }

  .delta-arrow {
    color: var(--ink-muted);
  }

  .delta-after {
    color: var(--accent-text);
    font-weight: 600;
  }

  /* Endorsement Component: parent signature on product sites */
  .endorsement {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding-block: var(--space-2);
    border-block-start: 1px solid var(--border);
    color: var(--ink-muted);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
  }

  /* Status Badges: always paired with a word and icon */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding-block: 0.25rem;
    padding-inline: 0.625rem;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1.25;
  }

  .badge-success {
    background-color: var(--success-tint);
    color: var(--success);
    border-color: color-mix(in oklab, var(--success) 30%, transparent);
  }

  .badge-warning {
    background-color: var(--warning-tint);
    color: var(--warning);
    border-color: color-mix(in oklab, var(--warning) 30%, transparent);
  }

  .badge-danger {
    background-color: var(--danger-tint);
    color: var(--danger);
    border-color: color-mix(in oklab, var(--danger) 30%, transparent);
  }

  .badge-info {
    background-color: var(--brand-tint);
    color: var(--brand-text);
    border-color: color-mix(in oklab, var(--brand-text) 30%, transparent);
  }

  /* ArcMotif Graphic Device */
  .arc-motif {
    display: block;
    color: var(--border-strong);
  }

  .arc-motif .arc-base {
    stroke: currentColor;
    stroke-width: 8;
    stroke-linecap: round;
    fill: none;
  }

  .arc-motif .arc-altered {
    stroke: var(--accent-graphic);
    stroke-width: 8;
    stroke-linecap: round;
    fill: none;
  }

  .arc-motif .arc-node {
    stroke: var(--accent-graphic);
    stroke-width: 5;
    fill: var(--surface);
  }

  /* Architectural Coordinate Grid Motif */
  .surface-grid {
    background-image:
      linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
      linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
    background-size: var(--grid-cell) var(--grid-cell);
    background-position: top center;
  }

  .surface-midnight.surface-grid {
    background-image:
      radial-gradient(ellipse 68% 58% at 72% 18%, rgba(38, 104, 186, 0.14), transparent 72%),
      linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
      linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
    background-size: 100% 100%, var(--grid-cell) var(--grid-cell), var(--grid-cell) var(--grid-cell);
    background-position: center, top center, top center;
  }

  /* Architecture Topology Flow Component */
  .arch-flow {
    display: grid;
    gap: 0;
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background-color: var(--surface-sunken);
  }

  .arch-node {
    display: grid;
    gap: var(--space-1);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-strong);
    background-color: var(--surface-raised);
  }

  .arch-node-altered {
    border-color: var(--accent-graphic);
    background-color: var(--brand-tint);
  }

  .arch-connector {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding-inline-start: var(--space-4);
    padding-block: 0.35rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
    font-variant-numeric: tabular-nums;
  }

  .arch-connector::before {
    content: "";
    inline-size: 1px;
    block-size: 1rem;
    background-color: var(--accent-graphic);
  }

  /* State-Change Proportional Compression Meter (.delta-bar) */
  .delta-bar {
    position: relative;
    block-size: 0.75rem;
    inline-size: 100%;
    border-radius: var(--radius-pill);
    background-color: var(--surface-sunken);
    background-image: repeating-linear-gradient(
      -45deg,
      transparent 0 5px,
      color-mix(in oklab, var(--border-strong) 26%, transparent) 5px 7px
    );
    border: 1px solid var(--border-strong);
    overflow: hidden;
  }

  .delta-bar-fill {
    block-size: 100%;
    border-radius: var(--radius-pill);
    background-color: var(--accent-graphic);
    transition: inline-size 280ms cubic-bezier(0.22, 1, 0.36, 1);
  }

  @media (prefers-reduced-motion: reduce) {
    .delta-bar-fill {
      transition: none;
    }
  }

  @media (forced-colors: active) {
    .delta-bar-fill {
      background-color: Highlight;
    }
  }

  /* State-Change Before/After Split (.state-compare) */
  .state-compare {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
    gap: var(--space-4);
    align-items: stretch;
  }

  .state-legacy {
    background-color: var(--surface-sunken);
    border: 1.5px dashed var(--border-strong);
    border-radius: var(--radius-legacy);
    padding: var(--space-4);
    display: grid;
    gap: var(--space-2);
    align-content: start;
  }

  .state-lean {
    background-color: var(--surface-raised);
    border: 1.5px solid var(--accent-graphic);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    display: grid;
    gap: var(--space-2);
    align-content: start;
    box-shadow: var(--shadow-sm);
  }
}

@layer print {
  @media print {
    :root {
      --surface: #FFFFFF;
      --surface-raised: #FFFFFF;
      --ink: #0D1524;
      --ink-muted: #47586E;
      --border: #CBD5E1;
      --grid-line: transparent;
      --shadow-sm: none;
      --shadow-md: none;
    }

    body {
      background: #FFFFFF;
      color: #0D1524;
    }

    .surface-grid {
      background-image: none !important;
    }

    .card,
    .arch-flow,
    .state-compare,
    .state-legacy,
    .state-lean {
      box-shadow: none;
      border-color: #CBD5E1;
      break-inside: avoid;
    }
  }
}