/* Design system tokens — `--ds-*` namespace.
 *
 * The `--ds-*` set is the opt-in design system introduced by the
 * /home redesign: green/navy palette, system font stack, light/dark
 * surface pair, blue-info + amber-warn callout vocabularies.
 *
 * Pages opt into the design system by adding a scope class
 * (`.home-mock`, `.advanced-mock`) and referencing `var(--ds-*)`.
 * Tokens live globally so any future page (or shared component) can
 * pick them up without re-declaring values.
 *
 * The legacy `--primary` family in style-custom.css remains the
 * default app brand (blue) used by login, dashboard, catalog,
 * marketplace, admin, etc. The two systems coexist — pages that
 * haven't been redesigned keep reading `var(--primary)` and stay
 * blue; redesigned pages reference `var(--ds-*)` and get the green
 * surface.
 */

:root {
    /* Brand surface — green/navy palette. Opted into via the
       `.home-mock` / `.advanced-mock` scopes. */
    --ds-primary: #2ea877;          /* brand-dark green */
    --ds-primary-dark: #1f8a5e;     /* hover/active */
    --ds-primary-light: #e6f9f0;    /* mint tint */
    --ds-brand-accent: #54d3a0;     /* brand (lighter) */

    /* Hero surface — deep navy used by setup hero + first-session
       terminal-frame backgrounds. Reads as the visual ground for any
       "this is what your terminal will look like" mock-up. */
    --ds-hero-bg: #0f1b3a;
    --ds-hero-bg-deep: #0a1430;
    --ds-hero-ink: #f3f6ff;

    /* Code-panel surface — near-black bg with cool-blue ink + warm
       yellow command accent. Used by `.code-block` (copyable install
       command), `.terminal-body`, expected-output blocks. */
    --ds-code-bg: #0c1224;
    --ds-code-ink: #d7e4ff;
    --ds-code-yellow: #ffd866;

    /* Light surface — page background, card surface, dim variant
       for inset panels. */
    --ds-bg: #f6f7fa;
    --ds-surface: #ffffff;
    --ds-surface-dim: #f0f2f6;
    --ds-border: #e4e7ee;
    --ds-border-light: #f0f2f6;

    /* Text — primary / secondary / muted on light surfaces. Primary
       is near-black for body copy; muted is for chrome (timestamps,
       hints, captions). */
    --ds-text-primary: #0e1525;
    --ds-text-secondary: #4a5168;
    --ds-text-muted: #788098;

    /* Accent — orange used for terminal `[3]`-style prompts and the
       Cowork surface card warning chip. */
    --ds-orange: #C2410C;
    --ds-orange-light: #FED7AA;

    /* Callout vocabularies — `.callout-hint` (blue info) and
       `.callout-rec` (amber recommendation). Background +
       left-border + ink so the box reads at a glance. */
    --ds-info-bg: #eef3ff;
    --ds-info-ink: #1c3994;
    --ds-info-line: #4f7cf2;
    --ds-warn-bg: #fff8e6;
    --ds-warn-ink: #6e4d00;
    --ds-warn-line: #f5c84b;

    /* Elevation — navy-tinted shadow stack. Matches the deep-navy
       hero so the depth perception reads consistently across the
       page. */
    --ds-shadow-sm: 0 1px 2px rgba(15, 27, 58, .05), 0 1px 3px rgba(15, 27, 58, .06);
    --ds-shadow-md: 0 4px 16px rgba(15, 27, 58, .08);
    --ds-shadow-lg: 0 8px 24px rgba(15, 27, 58, .14);

    /* Hero box-shadow tint — used by `.page-header--hero`,
       `.stack-hero`, `.env-setup-cta`. Flipped per theme so the
       drop-shadow colour follows the gradient. */
    --ds-hero-shadow: rgba(15, 27, 58, 0.22);

    /* Hero eyebrow colour — green accent on top of the navy
       gradient by default. The "blue" theme aliases this to a
       translucent white because mint-green on blue reads poorly. */
    --ds-hero-eyebrow: var(--ds-brand-accent);

    /* Hero CTA pill — `<a class="btn-intro-primary">` on /home's
       intro hero. Mint-green-on-navy by default; the "blue" theme
       flips it to white-on-blue because mint-on-blue has poor
       contrast. */
    --ds-hero-cta-bg: var(--ds-brand-accent);
    --ds-hero-cta-fg: var(--ds-hero-bg);
    --ds-hero-cta-bg-hover: var(--ds-primary);

    /* Typography — system stack so weight + letterforms render
       identically on macOS (San Francisco) and Windows (Segoe UI).
       Inter remains a graceful fallback in the cascade. */
    --ds-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Inter", sans-serif;
    --ds-font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

/* ─── Theme: blue (pre-redesign palette) ──────────────────────────
   Activated by `<html data-theme="blue">`. Overrides only the
   tokens that diverge from the default navy theme:
     - brand fill          → blue (legacy `--primary`)
     - hero gradient       → blue → blue-dark
     - eyebrow accent      → translucent white (mint-green on blue
                              reads poorly)
     - drop-shadow tint    → blue
   Everything else (surfaces, callouts, code panels, fonts)
   stays the same. Page markup and component classes don't change
   between themes. */
:root[data-theme="blue"] {
    --ds-primary: var(--primary);
    --ds-primary-dark: var(--primary-dark);
    --ds-primary-light: var(--primary-light);
    --ds-brand-accent: var(--brand-accent);

    --ds-hero-bg: var(--primary);
    --ds-hero-bg-deep: var(--primary-dark);

    --ds-hero-shadow: rgba(0, 115, 209, 0.20);
    --ds-hero-eyebrow: rgba(255, 255, 255, 0.92);

    /* Blue theme — hero CTA pill flips to white-on-blue. Mint-green
       on blue reads badly; white on the brand-blue gradient has
       full contrast. Hover state darkens to a translucent white. */
    --ds-hero-cta-bg: #ffffff;
    --ds-hero-cta-fg: var(--primary-dark);
    --ds-hero-cta-bg-hover: rgba(255, 255, 255, 0.88);

    /* `.callout-hint` info-bg vocabulary — default is a cool-blue
       indigo (#eef3ff / #4f7cf2 / #1c3994) that reads as a
       distinct "info" hue on the navy theme. Under the brand-blue
       theme the indigo clashes with the hero gradient; re-tint to
       brand-blue so all the blue surfaces share a hue family. */
    --ds-info-bg: rgba(0, 115, 209, 0.08);
    --ds-info-line: var(--primary);
    --ds-info-ink: var(--primary-dark);
}

/* ─── Design-system additions driven by .interface-design/system.md ────
   Tokens consumed by the .ds-card family, the .badge--* modifiers, and
   the canonical focus-ring contract. Append-only; nothing above this
   block changed. */
:root {
    /* Cross-pattern accent vocabulary — one set of {bg,ink,line} per
       status that feeds .flash-*, .badge--*, .ds-card--*, and the
       legacy .card-error/.card-highlight/.card-ai re-skins. Info +
       warn alias the pre-existing tokens above; success + danger are
       net-new. Per system.md: "One status vocabulary, five surfaces."
       Re-tinting any status is a one-token edit. */
    --ds-accent-info-bg:    var(--ds-info-bg);
    --ds-accent-info-ink:   var(--ds-info-ink);
    --ds-accent-info-line:  var(--ds-info-line);

    --ds-accent-warn-bg:    var(--ds-warn-bg);
    --ds-accent-warn-ink:   var(--ds-warn-ink);
    --ds-accent-warn-line:  var(--ds-warn-line);

    --ds-accent-success-bg:    #dcfce7;
    --ds-accent-success-ink:   #166534;
    --ds-accent-success-line:  #16a34a;

    --ds-accent-danger-bg:    #fee2e2;
    --ds-accent-danger-ink:   #991b1b;
    --ds-accent-danger-line:  #dc2626;

    /* Canonical focus-ring — one outline + offset reused on every
       interactive element (button, link, tab, table row, input). Per
       system.md: "Focus ring is non-negotiable. No outline: none
       carve-outs." */
    --ds-focus-outline:        2px solid var(--ds-primary);
    --ds-focus-outline-offset: 2px;

    /* Extended text hierarchy used by .ds-card and form-control rules. */
    --ds-text-disabled: #d1d5db;
    --ds-text-inverse:  #ffffff;
    --ds-text-link:     var(--ds-primary);
}