/*
 * Hearth — evening warmth, dark-first. The room after sunset: deep umber and
 * espresso surfaces that step lighter as they come toward you, the way
 * furniture catches firelight; a candle-glow amber primary; one slate-teal
 * counterpoint so the warmth never suffocates. Dark mode is the theme's
 * native identity — light mode is the morning after, a chroma-free off-white
 * with warm espresso ink and the same ember accent, deliberately outside the
 * saturated-AI cream band. Built for consumer evenings: reading, journaling,
 * the phone at 9pm.
 *
 * Palette rationale: every neutral lives on the umber axis (hue 40–70), never
 * blue-gray and never pure black — the darks are browns with the lights
 * turned down, so elevation can read as firelight (a faint warm rim plus a
 * soft umber ambient) instead of hard black drop shadows. The amber primary
 * carries dark ink, not white — dark-ink-on-bright is the contrast pattern
 * throughout.
 *
 * Token contract matches lib-theme-pristine/theme.css.
 */

/*
 * Fonts: consuming apps load Bitter + Nunito Sans + JetBrains Mono at the top
 * of their entry CSS via the Google Fonts URL documented in this theme's
 * README. No @import here — PostCSS ordering forbids it once the theme is
 * imported after other statements.
 */

:root {
    --font-sans: "Nunito Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-heading: "Bitter", Georgia, "Times New Roman", serif;
    --font-mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;

    /* Tailwind utility families — distinct names so a consuming app's
     * `@theme inline` can indirect to these. Mirror --font-heading/--font-sans. */
    --heading-family: "Bitter", Georgia, "Times New Roman", serif;
    --body-family: "Nunito Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

    /* ── Colors (light — the morning after) ──
     * True chroma-0 off-white body, warm espresso ink, ember primary.
     * The background deliberately avoids the warm-cream band; warmth is
     * carried by the ink and the ember, not the paper. */
    --background: oklch(0.975 0 0);
    --foreground: oklch(0.22 0.02 50);

    --card: oklch(1 0 0);
    --card-foreground: oklch(0.22 0.02 50);

    --popover: oklch(0.99 0 0);
    --popover-foreground: oklch(0.22 0.02 50);

    /* Ember — burnt orange deep enough for near-white ink by day. */
    --primary: oklch(0.48 0.15 40);
    --primary-foreground: oklch(0.98 0.008 80);

    --secondary: oklch(0.93 0.008 60);
    --secondary-foreground: oklch(0.3 0.02 50);

    --muted: oklch(0.94 0.006 60);
    --muted-foreground: oklch(0.45 0.02 55);

    --accent: oklch(0.93 0.03 55);
    --accent-foreground: oklch(0.42 0.12 45);

    --destructive: oklch(0.52 0.2 28);
    --destructive-foreground: oklch(0.98 0.008 80);
    --success: oklch(0.62 0.15 150);
    --success-foreground: oklch(0.15 0.03 150);
    --warning: oklch(0.75 0.13 75);
    --warning-foreground: oklch(0.22 0.05 75);
    /* Info — the one cool counterpoint: slate-teal. */
    --info: oklch(0.48 0.09 210);
    --info-foreground: oklch(0.97 0.008 210);

    --border: oklch(0.22 0.02 50 / 0.12);
    --input: oklch(0.22 0.02 50 / 0.12);
    --ring: oklch(0.48 0.15 40 / 0.5);

    /* Chart palette — ember / slate-teal / sage / heather / brick.
     * Hues ≥60° apart, lightness staggered between neighbours. */
    --chart-1: oklch(0.65 0.13 60);
    --chart-2: oklch(0.55 0.09 200);
    --chart-3: oklch(0.6 0.11 135);
    --chart-4: oklch(0.58 0.1 295);
    --chart-5: oklch(0.55 0.12 20);

    --sidebar: oklch(0.95 0.003 60);
    --sidebar-foreground: oklch(0.22 0.02 50);
    --sidebar-primary: oklch(0.48 0.15 40);
    --sidebar-primary-foreground: oklch(0.98 0.008 80);
    --sidebar-accent: oklch(0.92 0.025 55);
    --sidebar-accent-foreground: oklch(0.42 0.12 45);
    --sidebar-border: oklch(0.22 0.02 50 / 0.08);
    --sidebar-ring: oklch(0.48 0.15 40 / 0.5);

    --syntax-keyword: oklch(0.48 0.15 40);
    --syntax-string: oklch(0.5 0.11 150);
    --syntax-number: oklch(0.52 0.13 60);
    --syntax-comment: oklch(0.55 0.015 60);
    --syntax-function: oklch(0.48 0.09 230);
    --syntax-type: oklch(0.5 0.08 195);

    /* ── Chat surfaces ──
     * User bubble is a filled deep-ember panel with near-white ink;
     * assistant bubble is a card surface with a hairline border. */
    --chat-user-bg: oklch(0.46 0.14 40);
    --chat-user-fg: oklch(0.98 0.008 80);
    --chat-assistant-bg: oklch(1 0 0);
    --chat-assistant-fg: oklch(0.22 0.02 50);
    --chat-assistant-border: oklch(0.22 0.02 50 / 0.12);

    /* Generous-cozy radius — armchair, not app-store icon. */
    --radius: 1.0625rem;

    /* ── Motion ── slow-blink calm: unhurried base, decelerate-heavy.
     * Springs alias to the gentle standard eases — personality lives in
     * the values, never in absence. */
    --duration-fast: 150ms;
    --duration-base: 350ms;
    --duration-slow: 500ms;
    --duration-slower: 700ms;
    --duration-spring: 550ms;

    --ease-standard: cubic-bezier(0.25, 0.05, 0.2, 1);
    --ease-decelerate: cubic-bezier(0.05, 0.7, 0.1, 1);
    --ease-accelerate: cubic-bezier(0.3, 0, 1, 1);
    --ease-emphasized: cubic-bezier(0.2, 0, 0, 1);

    --ease-spring-gentle: var(--ease-standard);
    --ease-spring-snappy: var(--ease-standard);
    --ease-spring-bouncy: var(--ease-decelerate);

    /* ── Typography ── product register: fixed rem, full ramp.
     * Bitter for headings (warm slab-serif), Nunito Sans for body.
     * Body leans slightly large with generous leading — evening reading. */
    --text-hero-size: 3.25rem;
    --text-hero-lh: 1.08;
    --text-display-size: 2.75rem;
    --text-display-lh: 1.1;
    --text-headline-size: 2rem;
    --text-headline-lh: 1.15;
    --text-title-size: 1.5rem;
    --text-title-lh: 1.25;
    --text-subtitle-size: 1.1875rem;
    --text-subtitle-lh: 1.5;
    --text-body-size: 1.0625rem;
    --text-body-lh: 1.65;
    --text-label-size: 0.875rem;
    --text-label-lh: 1.25rem;
    --text-caption-size: 0.75rem;
    --text-caption-lh: 1rem;

    /* ── Elevation (light) ── soft warm-umber paper shadows. */
    --elevation-0: none;
    --elevation-1: 0 1px 2px oklch(0.22 0.02 50 / 0.06);
    --elevation-2: 0 1px 3px oklch(0.22 0.02 50 / 0.08), 0 1px 2px oklch(0.22 0.02 50 / 0.05);
    --elevation-3: 0 4px 10px -2px oklch(0.22 0.02 50 / 0.09), 0 2px 4px -2px oklch(0.22 0.02 50 / 0.05);
    --elevation-4: 0 12px 26px -4px oklch(0.22 0.02 50 / 0.11), 0 4px 8px -4px oklch(0.22 0.02 50 / 0.05);
    --elevation-5: 0 22px 44px -8px oklch(0.22 0.02 50 / 0.18);

    --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 — the hero. Deep espresso umber (never blue-gray, never black);
 * surfaces step LIGHTER as they come forward, like objects catching
 * firelight. Primary flips to candle-glow amber carrying dark umber ink.
 */
.dark {
    --background: oklch(0.17 0.018 55);
    --foreground: oklch(0.93 0.02 75);

    --card: oklch(0.23 0.02 55);
    --card-foreground: oklch(0.93 0.02 75);

    --popover: oklch(0.25 0.022 55);
    --popover-foreground: oklch(0.93 0.02 75);

    /* Candle-glow amber; dark-ink-on-bright beats white-on-mid-tone. */
    --primary: oklch(0.78 0.145 65);
    --primary-foreground: oklch(0.22 0.05 55);

    --secondary: oklch(0.28 0.025 55);
    --secondary-foreground: oklch(0.9 0.02 75);

    --muted: oklch(0.26 0.02 55);
    --muted-foreground: oklch(0.74 0.03 70);

    --accent: oklch(0.3 0.045 60);
    --accent-foreground: oklch(0.9 0.07 72);

    --destructive: oklch(0.68 0.19 30);
    --destructive-foreground: oklch(0.15 0.04 30);
    --success: oklch(0.72 0.15 145);
    --success-foreground: oklch(0.16 0.03 145);
    --warning: oklch(0.8 0.14 80);
    --warning-foreground: oklch(0.2 0.05 80);
    /* Slate-teal counterpoint, dark ink on top. */
    --info: oklch(0.72 0.1 200);
    --info-foreground: oklch(0.15 0.03 210);

    --border: oklch(0.95 0.03 75 / 0.12);
    --input: oklch(0.95 0.03 75 / 0.12);
    --ring: oklch(0.78 0.145 65 / 0.5);

    --chart-1: oklch(0.78 0.13 65);
    --chart-2: oklch(0.7 0.09 200);
    --chart-3: oklch(0.74 0.11 135);
    --chart-4: oklch(0.72 0.09 295);
    --chart-5: oklch(0.68 0.1 20);

    /* Sidebar sits a step further from the fire — darker than the page. */
    --sidebar: oklch(0.15 0.016 55);
    --sidebar-foreground: oklch(0.9 0.02 75);
    --sidebar-primary: oklch(0.78 0.145 65);
    --sidebar-primary-foreground: oklch(0.22 0.05 55);
    --sidebar-accent: oklch(0.26 0.04 60);
    --sidebar-accent-foreground: oklch(0.9 0.07 72);
    --sidebar-border: oklch(0.95 0.03 75 / 0.08);
    --sidebar-ring: oklch(0.78 0.145 65 / 0.5);

    --syntax-keyword: oklch(0.8 0.13 65);
    --syntax-string: oklch(0.76 0.12 145);
    --syntax-number: oklch(0.82 0.12 80);
    --syntax-comment: oklch(0.6 0.02 65);
    --syntax-function: oklch(0.74 0.09 210);
    --syntax-type: oklch(0.76 0.07 180);

    /* ── Chat surfaces (dark) ── */
    --chat-user-bg: oklch(0.44 0.11 50);
    --chat-user-fg: oklch(0.97 0.015 80);
    --chat-assistant-bg: oklch(0.26 0.022 55);
    --chat-assistant-fg: oklch(0.93 0.02 75);
    --chat-assistant-border: oklch(0.95 0.03 75 / 0.1);

    /* ── Elevation (dark) — firelight, not drop shadow ──
     * Each level pairs a faint warm rim on the top edge (the surface
     * catching the glow) with a soft deep-umber ambient — never pure black.
     * Lift is mostly conveyed by the lighter surface itself. */
    --elevation-1: inset 0 1px 0 oklch(0.9 0.06 70 / 0.05), 0 1px 2px oklch(0.08 0.015 50 / 0.45);
    --elevation-2: inset 0 1px 0 oklch(0.9 0.06 70 / 0.07), 0 2px 6px oklch(0.08 0.015 50 / 0.5);
    --elevation-3: inset 0 1px 0 oklch(0.9 0.06 70 / 0.09), 0 6px 14px -2px oklch(0.08 0.015 50 / 0.55);
    --elevation-4: inset 0 1px 0 oklch(0.9 0.06 70 / 0.1), 0 12px 28px -4px oklch(0.08 0.015 50 / 0.6);
    --elevation-5: inset 0 1px 0 oklch(0.9 0.06 70 / 0.12), 0 22px 48px -8px oklch(0.08 0.015 50 / 0.7);
}

/*
 * @layer base — Hearth's evening philosophy.
 *
 * No glass, no hard chrome. Slab-serif headings, generous body leading,
 * surfaces separated by warmth (lighter = closer) rather than heavy shadow.
 * Interactions settle slowly — nothing snaps in a room lit by a fire.
 */
@layer base {
    body {
        min-height: 100vh;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        font-family: var(--font-sans);
        font-size: var(--text-body-size);
        line-height: var(--text-body-lh);
        letter-spacing: 0.002em;
    }

    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: 600;
        letter-spacing: -0.01em;
        color: var(--foreground);
    }

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

    /* Inline code — neutral ink on a warm tinted chip; the ember stays
     * reserved for actions, links and focus. */
    :not(pre) > code {
        padding: 0.1em 0.35em;
        border-radius: calc(var(--radius) * 0.35);
        background: color-mix(in oklch, var(--foreground) 7%, transparent);
        color: var(--foreground);
        font-size: 0.9em;
    }

    /* Selection — an ember wash, like lamplight across the line. */
    ::selection {
        background: color-mix(in oklch, var(--primary) 26%, transparent);
        color: var(--foreground);
    }

    a {
        color: var(--accent-foreground);
        text-decoration-color: color-mix(in oklch, var(--primary) 40%, transparent);
        text-underline-offset: 0.2em;
        transition: text-decoration-color var(--duration-fast) var(--ease-standard);
    }
    a:hover {
        text-decoration-color: var(--primary);
    }

    /* Cards & overlay surfaces — a hairline plus the firelight elevation.
     * In dark mode the lighter surface does most of the lifting; the shadow
     * is an accent, not the mechanism. */
    [data-slot="card"],
    [data-slot="popover-content"],
    [data-slot="dropdown-menu-content"],
    [data-slot="context-menu-content"],
    [data-slot="hover-card-content"],
    [data-slot="select-content"],
    [data-slot="command"],
    [data-slot="tooltip-content"],
    [data-slot="sheet-content"],
    [data-slot="dialog-content"],
    [data-slot="alert-dialog-content"],
    [data-slot="drawer-content"] {
        border: var(--border-width-base) solid var(--border);
        box-shadow: var(--elevation-2);
    }

    [data-slot="dialog-content"],
    [data-slot="alert-dialog-content"],
    [data-slot="sheet-content"],
    [data-slot="drawer-content"] {
        box-shadow: var(--elevation-4);
    }

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

    /* Buttons — settle, don't snap. */
    [data-slot="button"] {
        font-weight: 600;
        transition:
            opacity var(--duration-fast) var(--ease-standard),
            transform var(--duration-fast) var(--ease-standard);
    }
    [data-slot="button"]:hover:not(:disabled) {
        opacity: 0.9;
    }
    [data-slot="button"]:active:not(:disabled) {
        opacity: 0.82;
        transform: scale(0.99);
    }
    [data-slot="button"]:focus-visible {
        outline: 2px solid var(--ring);
        outline-offset: 2px;
    }
}

/*
 * Unlayered control tuning — outside @layer base so it beats Tailwind's
 * utility defaults shipped with shadcn primitives.
 */

/* 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 its density; 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;
    }
}