/*
 * Klein — ultramarine drench.
 *
 * Yves Klein blue as the identity. The background field ITSELF is a committed,
 * saturated deep ultramarine — not a tint, not an accent, the world you stand
 * in — carrying near-white ink. Cards are clean near-white panels floating on
 * the blue, with dark ink on top. This inverts the usual light-theme logic:
 * :root (light mode) IS the drenched blue world; the blue carries 30–60% of
 * every surface by construction.
 *
 * The counterpoint is a warm amber-orange (hue ~60) spent on the primary
 * action, focus, selection, and the user chat bubble — the one hot signal that
 * pops off the ultramarine. Secondary and muted stay inside the blue family
 * (deeper stripes of the same hue); the sidebar is a deeper band of
 * ultramarine. Borders are dark hairlines because borders live on the white
 * cards and inputs; the sidebar gets its own white-alpha hairline token.
 *
 * Dark mode is ultramarine at midnight: the field deepens, cards become deep
 * blue panels stepping LIGHTER off the field, ink stays near-white — the theme
 * is unmistakably blue in both modes.
 *
 * Type is the art-poster voice: Syne (700+) for headings, Inter for body,
 * JetBrains Mono for code. Consumer register — generous 1rem radius, confident
 * motion (150/300/450/600ms) with real gentle springs, deep blue-black shadows
 * (a drenched field casts blue shadow, never gray).
 *
 * Token contract matches lib-theme-caffe-florian/theme.css (Crema v1).
 */

/*
 * Fonts: consuming apps load Syne + Inter + JetBrains Mono at the top of their
 * entry CSS (where @import statements are allowed), via the Google Fonts URL
 * documented in this theme's README. Embedding the @import here — or smuggling
 * the URL in a comment for a build script to lift — breaks PostCSS's ordering
 * rules, so neither is done in this file.
 */

:root {
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-heading: "Syne", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

    /* Tailwind utility families. Distinct names so a consuming app's
     * `@theme inline` can indirect to these (--font-heading/--font-sans collide
     * with Tailwind's own font-* namespace). Mirror --font-heading/--font-sans. */
    --heading-family: "Syne", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    --body-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

    /* ── Colors ── the drench: deep saturated ultramarine field, near-white
     * ink on the blue, clean near-white cards carrying dark blue-black ink. */
    --background: oklch(0.44 0.2 265);
    --foreground: oklch(0.985 0.008 265);

    --card: oklch(0.99 0.005 265);
    --card-foreground: oklch(0.21 0.045 265);

    --popover: oklch(1 0 0);
    --popover-foreground: oklch(0.21 0.045 265);

    /* Primary — the warm counterpoint. Vivid amber-orange with near-black warm
     * ink on top (bright-swatch/dark-ink pairing); the one hot signal that
     * pops off the blue field. */
    --primary: oklch(0.72 0.17 60);
    --primary-foreground: oklch(0.2 0.05 60);

    /* Secondary — a deeper stripe of the same ultramarine, white ink. */
    --secondary: oklch(0.38 0.18 265);
    --secondary-foreground: oklch(0.975 0.008 265);

    /* Muted — the family's quiet register: deeper blue surface; the muted ink
     * is a pale desaturated ultramarine that still clears 4.5:1 on the field. */
    --muted: oklch(0.39 0.18 265);
    --muted-foreground: oklch(0.87 0.05 265);

    /* Accent — hover/selection tint for menus and popovers (which are white
     * panels here): a pale ultramarine wash with deep blue ink. */
    --accent: oklch(0.93 0.035 265);
    --accent-foreground: oklch(0.3 0.13 265);

    /* ── Status ── tuned for the CARD surface (chips sit on white panels).
     * Dark ink on bright swatches for success/warning/info; destructive keeps
     * a light label on a deep alarm red. Warning sits at yellow ~90 so it
     * never reads as the amber-orange primary (hue 60). Info is a cyan-sky
     * (~220) clearly apart from the ultramarine field (265). */
    --destructive: oklch(0.55 0.21 27);
    --destructive-foreground: oklch(0.98 0.01 27);
    --success: oklch(0.62 0.14 150);
    --success-foreground: oklch(0.17 0.03 150);
    --warning: oklch(0.8 0.15 90);
    --warning-foreground: oklch(0.23 0.05 90);
    --info: oklch(0.7 0.12 220);
    --info-foreground: oklch(0.16 0.03 220);

    /* Borders live where hairlines are drawn: on white cards and inputs — so
     * --border is a dark blue-ink hairline. The blue field's own hairlines are
     * carried by --sidebar-border (white-alpha) below. */
    --border: oklch(0.21 0.045 265 / 0.14);
    --input: oklch(0.21 0.045 265 / 0.18);
    --ring: oklch(0.72 0.17 60 / 0.6);

    /* Chart palette — amber counterpoint leads, then the identity ultramarine,
     * teal, magenta, green. Hues spaced ≥60°, adjacent lightness varied.
     * Tuned for the white card surface where charts render. */
    --chart-1: oklch(0.72 0.17 60);
    --chart-2: oklch(0.48 0.2 265);
    --chart-3: oklch(0.65 0.12 190);
    --chart-4: oklch(0.56 0.2 340);
    --chart-5: oklch(0.62 0.15 150);

    /* Sidebar — a deeper stripe of ultramarine; hairlines on the blue are
     * white-alpha; the amber signal marks the active item. */
    --sidebar: oklch(0.36 0.17 265);
    --sidebar-foreground: oklch(0.975 0.008 265);
    --sidebar-primary: oklch(0.72 0.17 60);
    --sidebar-primary-foreground: oklch(0.2 0.05 60);
    --sidebar-accent: oklch(0.47 0.2 265);
    --sidebar-accent-foreground: oklch(0.985 0.008 265);
    --sidebar-border: oklch(1 0 0 / 0.18);
    --sidebar-ring: oklch(0.72 0.17 60 / 0.6);

    /* Syntax — code blocks render on light card surfaces: deep inks with the
     * theme's blue and amber in the leading roles. */
    --syntax-keyword: oklch(0.45 0.2 265);
    --syntax-string: oklch(0.48 0.12 150);
    --syntax-number: oklch(0.55 0.14 60);
    --syntax-comment: oklch(0.55 0.03 265);
    --syntax-function: oklch(0.5 0.16 300);
    --syntax-type: oklch(0.48 0.1 190);

    /* ── Chat surfaces ──
     * Contract for lib-chat-ui / lib-agent-ui / lib-agent-dock-ui. The user
     * bubble is the amber counterpoint (dark ink) glowing against the blue
     * field; the assistant answers on a clean white card with a hairline. */
    --chat-user-bg: oklch(0.72 0.17 60);
    --chat-user-fg: oklch(0.2 0.05 60);
    --chat-assistant-bg: oklch(0.99 0.005 265);
    --chat-assistant-fg: oklch(0.21 0.045 265);
    --chat-assistant-border: oklch(0.21 0.045 265 / 0.12);

    /* Generous consumer radius. */
    --radius: 1rem;

    /* ── Motion ── confident consumer pacing with real gentle springs — the
     * bold identity is allowed a physical settle. */
    --duration-fast: 150ms;
    --duration-base: 300ms;
    --duration-slow: 450ms;
    --duration-slower: 600ms;
    --duration-spring: 450ms;

    --ease-standard: cubic-bezier(0.2, 0, 0, 1);
    --ease-decelerate: cubic-bezier(0, 0, 0, 1);
    --ease-accelerate: cubic-bezier(0.3, 0, 1, 1);
    --ease-emphasized: cubic-bezier(0.3, 0, 0, 1);

    --ease-spring-gentle: cubic-bezier(0.34, 1.16, 0.64, 1);
    --ease-spring-snappy: cubic-bezier(0.42, 1.28, 0.56, 1);
    --ease-spring-bouncy: cubic-bezier(0.36, 1.44, 0.44, 1);

    /* ── Typography ── consumer register, fixed rem, full role ramp. */
    --text-hero-size: 3.25rem;
    --text-hero-lh: 1.05;
    --text-display-size: 2.5rem;
    --text-display-lh: 1.1;
    --text-headline-size: 1.75rem;
    --text-headline-lh: 1.2;
    --text-title-size: 1.375rem;
    --text-title-lh: 1.3;
    --text-subtitle-size: 1.125rem;
    --text-subtitle-lh: 1.45;
    --text-body-size: 1rem;
    --text-body-lh: 1.6;
    --text-label-size: 0.875rem;
    --text-label-lh: 1.25rem;
    --text-caption-size: 0.75rem;
    --text-caption-lh: 1.125rem;

    /* ── Elevation ── shadows cast on a drenched field are deep blue-black,
     * never gray — white cards lift off the ultramarine on blue shadow. */
    --elevation-0: none;
    --elevation-1: 0 1px 2px oklch(0.12 0.08 265 / 0.2);
    --elevation-2: 0 2px 4px oklch(0.12 0.08 265 / 0.24), 0 1px 2px oklch(0.12 0.08 265 / 0.16);
    --elevation-3: 0 6px 12px -2px oklch(0.12 0.08 265 / 0.28), 0 2px 4px -2px oklch(0.12 0.08 265 / 0.18);
    --elevation-4: 0 14px 28px -6px oklch(0.12 0.08 265 / 0.34), 0 4px 10px -4px oklch(0.12 0.08 265 / 0.2);
    --elevation-5: 0 24px 48px -8px oklch(0.12 0.08 265 / 0.44);

    --spacing: 0.25rem;

    --border-width-thin: 0.5px;
    --border-width-base: 1px;
    --border-width-thick: 2px;
    --border-width-heavy: 4px;

    /* No glass — inert values so consuming apps referencing these get no-ops. */
    --glass-blur: 0px;
    --glass-saturate: 100%;
    --glass-brightness: 1;
    --glass-contrast: 1;
}

/*
 * Dark mode — ultramarine at midnight. The field deepens (still unmistakably
 * blue, never charcoal); cards become deep blue panels stepping LIGHTER off
 * the field (bg 0.30 → card 0.36 → popover 0.385 → muted 0.40); ink stays
 * near-white; the amber signal brightens a touch against the night.
 */
.dark {
    --background: oklch(0.3 0.13 265);
    --foreground: oklch(0.965 0.01 265);

    --card: oklch(0.36 0.14 265);
    --card-foreground: oklch(0.965 0.01 265);

    --popover: oklch(0.385 0.14 265);
    --popover-foreground: oklch(0.965 0.01 265);

    --primary: oklch(0.75 0.16 60);
    --primary-foreground: oklch(0.2 0.05 60);

    --secondary: oklch(0.4 0.15 265);
    --secondary-foreground: oklch(0.95 0.012 265);

    --muted: oklch(0.4 0.15 265);
    --muted-foreground: oklch(0.85 0.045 265);

    --accent: oklch(0.45 0.16 265);
    --accent-foreground: oklch(0.97 0.01 265);

    --destructive: oklch(0.56 0.21 27);
    --destructive-foreground: oklch(0.98 0.01 27);
    --success: oklch(0.7 0.15 150);
    --success-foreground: oklch(0.17 0.03 150);
    --warning: oklch(0.83 0.15 90);
    --warning-foreground: oklch(0.23 0.05 90);
    --info: oklch(0.74 0.12 220);
    --info-foreground: oklch(0.16 0.03 220);

    /* At midnight every surface is blue, so hairlines are white-ink alpha. */
    --border: oklch(0.97 0.01 265 / 0.16);
    --input: oklch(0.97 0.01 265 / 0.2);
    --ring: oklch(0.75 0.16 60 / 0.6);

    --chart-1: oklch(0.78 0.16 60);
    --chart-2: oklch(0.68 0.15 265);
    --chart-3: oklch(0.74 0.12 190);
    --chart-4: oklch(0.7 0.17 340);
    --chart-5: oklch(0.74 0.15 150);

    --sidebar: oklch(0.26 0.12 265);
    --sidebar-foreground: oklch(0.965 0.01 265);
    --sidebar-primary: oklch(0.75 0.16 60);
    --sidebar-primary-foreground: oklch(0.2 0.05 60);
    --sidebar-accent: oklch(0.37 0.15 265);
    --sidebar-accent-foreground: oklch(0.97 0.01 265);
    --sidebar-border: oklch(1 0 0 / 0.14);
    --sidebar-ring: oklch(0.75 0.16 60 / 0.6);

    --syntax-keyword: oklch(0.82 0.1 265);
    --syntax-string: oklch(0.82 0.12 150);
    --syntax-number: oklch(0.84 0.13 60);
    --syntax-comment: oklch(0.72 0.03 265);
    --syntax-function: oklch(0.8 0.12 300);
    --syntax-type: oklch(0.8 0.1 190);

    /* ── Chat surfaces (dark) ── the amber user bubble glows against the
     * midnight field; the assistant answers on a deep blue card panel. */
    --chat-user-bg: oklch(0.75 0.16 60);
    --chat-user-fg: oklch(0.2 0.05 60);
    --chat-assistant-bg: oklch(0.36 0.14 265);
    --chat-assistant-fg: oklch(0.965 0.01 265);
    --chat-assistant-border: oklch(0.97 0.01 265 / 0.14);

    --elevation-1: 0 1px 2px oklch(0.08 0.05 265 / 0.4);
    --elevation-2: 0 2px 4px oklch(0.08 0.05 265 / 0.45), 0 1px 2px oklch(0.08 0.05 265 / 0.3);
    --elevation-3: 0 6px 12px -2px oklch(0.08 0.05 265 / 0.5), 0 2px 4px -2px oklch(0.08 0.05 265 / 0.3);
    --elevation-4: 0 14px 28px -6px oklch(0.08 0.05 265 / 0.55), 0 4px 10px -4px oklch(0.08 0.05 265 / 0.3);
    --elevation-5: 0 24px 48px -8px oklch(0.08 0.05 265 / 0.65);
}

/*
 * @layer base — Klein's poster philosophy.
 *
 * The field is the identity: content floats on committed ultramarine. Syne
 * headings at 700 give the art-poster voice; Inter keeps the body legible and
 * modern; the amber counterpoint does all the pointing — selection, focus,
 * links' underlines, the CTA.
 */
@layer base {
    body {
        min-height: 100vh;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        letter-spacing: -0.005em;
        font-family: var(--font-sans);
        font-size: var(--text-body-size);
        line-height: var(--text-body-lh);
    }

    /* Headings — Syne at 700, the poster voice. Syne runs wide; a touch of
     * negative tracking keeps it confident rather than sprawling. */
    h1, h2, h3, h4,
    [data-slot="card-title"],
    [data-slot="dialog-title"],
    [data-slot="sheet-title"],
    [data-slot="alert-dialog-title"] {
        font-family: var(--font-heading);
        font-weight: 700;
        letter-spacing: -0.015em;
        /* inherit, not var(--foreground): identity themes put headings on
         * colored slabs (bg-primary heroes) — forcing the field ink there
         * breaks the slab's own foreground pairing. */
        color: inherit;
    }

    code, kbd, samp, pre,
    [data-slot="code"],
    [data-slot="code-block"] {
        font-family: var(--font-mono);
    }

    /* Inline code — neutral chip: foreground-tint wash with foreground ink,
     * so it reads correctly on both the blue field and the white cards. */
    :not(pre) > code {
        padding: 0.1em 0.35em;
        border-radius: calc(var(--radius) * 0.5);
        background: color-mix(in oklch, var(--foreground) 8%, transparent);
        color: var(--foreground);
        font-size: 0.9em;
    }

    /* Selection — the amber counterpoint, everywhere. */
    ::selection {
        background: color-mix(in oklch, var(--primary) 45%, transparent);
        color: var(--foreground);
    }

    /* Links — ink follows the surface (white on the field, dark on cards);
     * the amber underline is the constant link signal on both. */
    a {
        color: inherit;
        font-weight: 600;
        text-decoration-color: color-mix(in oklch, var(--primary) 70%, transparent);
        text-decoration-thickness: 2px;
        text-underline-offset: 0.2em;
        transition: text-decoration-color var(--duration-fast) var(--ease-standard);
    }
    a:hover {
        text-decoration-color: var(--primary);
    }

    [data-slot="sidebar"] {
        background: var(--sidebar);
        border-right: var(--border-width-base) solid var(--sidebar-border);
    }
}

/*
 * Focus-visible — the amber ring, offset (not inset), for keyboard users.
 * Placed outside @layer base so it beats Tailwind's default ring utilities.
 */
[data-slot="button"]:focus-visible,
[data-slot="input"]:focus-visible,
[data-slot="textarea"]:focus-visible,
[data-slot="select-trigger"]:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    box-shadow: none;
}

/* Buttons — confident weight; a springy press absorb suits the identity. */
[data-slot="button"] {
    font-weight: 600;
    letter-spacing: -0.005em;
}

/* Card titles — pinned to the subtitle role so the scale is the theme's
 * decision, not the card primitive's default. */
[data-slot="card-title"] {
    font-size: var(--text-subtitle-size);
    line-height: var(--text-subtitle-lh);
}

/* Touch targets — desktop keeps the consumer density ladder; coarse pointers
 * get the 44px floor on every control. */
@media (pointer: coarse) {
    [data-slot="button"] {
        min-height: 2.75rem;
        min-width: 2.75rem;
    }
    [data-slot="input"],
    [data-slot="select-trigger"] {
        min-height: 2.75rem;
    }
}
[data-slot="button"]:hover:not(:disabled) {
    opacity: 0.92;
}
[data-slot="button"]:active:not(:disabled) {
    opacity: 0.84;
    transform: scale(0.98);
    transition:
        transform var(--duration-fast) var(--ease-spring-gentle),
        opacity var(--duration-fast) var(--ease-standard);
}

/* Inputs — white card panels with dark hairlines floating on the blue;
 * the amber focus ring is the constant. */
[data-slot="input"],
[data-slot="textarea"],
[data-slot="select-trigger"] {
    background: var(--card);
    border: var(--border-width-base) solid var(--input);
    border-radius: var(--radius);
    color: var(--card-foreground);
    transition:
        border-color var(--duration-fast) var(--ease-standard),
        box-shadow var(--duration-fast) var(--ease-standard);
}
[data-slot="input"]::placeholder,
[data-slot="textarea"]::placeholder {
    color: color-mix(in oklch, var(--card-foreground) 55%, transparent);
}
[data-slot="input"]:hover:not(:disabled),
[data-slot="textarea"]:hover:not(:disabled),
[data-slot="select-trigger"]:hover:not(:disabled) {
    border-color: color-mix(in oklch, var(--card-foreground) 32%, transparent);
}
[data-slot="input"]:focus,
[data-slot="textarea"]:focus,
[data-slot="select-trigger"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary);
    outline: none;
}