/*
 * Beacon — dark-native AAA. The lighthouse theme.
 *
 * Access-first / maximum-legibility family, candidate 1 of 3. WCAG AAA is the
 * identity, not the compliance checkbox: built for NDIS participants, their
 * families, and older support coordinators — including photophobic and
 * low-vision users who need DARK high contrast. The discipline IS the
 * personality.
 *
 * The dark mode is the theme. A near-black cool-neutral field (L 0.13 — dark
 * but never pure #000, which causes halation for astigmatic users) carries
 * very light ink at ~18:1. Cards step clearly LIGHTER (L 0.19) so surface
 * boundaries are legible without squinting, and borders are strong light-alpha
 * strokes (0.3) — on near-black, borders do all the separation; elevation
 * stays low. One accent: a bright accessible yellow-gold (hue 95) with
 * near-black ink on top — the classic high-contrast-dark action idiom, a
 * lighthouse beam. Links are the yellow, underlined by default. Focus is a
 * 3px yellow outline — unmistakable.
 *
 * Light mode is the competent daylight variant: white field, near-black ink
 * ~19:1, primary flips to a deep amber-brown with a white label, and the
 * yellow survives as the selection highlight.
 *
 * Status hues are tuned so every label pair computes ≥7:1 (AAA at body size),
 * and warning sits at orange (hue 55–60) well away from the yellow primary
 * (hue 95) so the two never read as the same swatch.
 *
 * Type: Public Sans (USWDS accessibility heritage) for body AND headings
 * (weight 600); IBM Plex Mono for code. The ramp starts larger than product
 * default — body 1.125rem/1.65, nothing below 14px — with generous
 * line-heights throughout. Radius modest (0.5rem). Motion minimal and quick;
 * all springs alias to standard; reduced-motion zeroes transitions.
 *
 * Contrast ratios in comments are computed with the validator's own OKLCH →
 * sRGB → WCAG-luminance math (quick check: Y ≈ L³; ratio = (Y1+.05)/(Y2+.05)).
 *
 * Token contract: Crema v1 (matches lib-theme-harbor/theme.css structure).
 */

/*
 * Fonts: consuming apps load Public Sans + IBM Plex Mono at the top of their
 * entry CSS via the Google Fonts URL documented in this theme's README.
 * Embedding the @import here breaks PostCSS ordering, so it is not done.
 */

:root {
    --font-sans: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-heading: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

    /* Tailwind utility families — mirror --font-heading/--font-sans. */
    --heading-family: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --body-family: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

    /* ── Colors (light) ── white field, near-black ink, deep amber-brown
     * action. foreground/background 18.58:1; foreground/card 19.12:1. */
    --background: oklch(0.99 0.002 250);
    --foreground: oklch(0.17 0.004 250);

    --card: oklch(1 0 0);
    --card-foreground: oklch(0.17 0.004 250);

    --popover: oklch(1 0 0);
    --popover-foreground: oklch(0.17 0.004 250);

    /* Primary — deep amber-brown (the beam by day), white label 8.30:1 (AAA).
     * The bright yellow returns as the selection highlight (--accent). */
    --primary: oklch(0.42 0.11 80);
    --primary-foreground: oklch(0.99 0.005 80);

    --secondary: oklch(0.94 0.004 250);
    --secondary-foreground: oklch(0.25 0.005 250); /* 13.42:1 */

    --muted: oklch(0.94 0.004 250);
    /* muted-foreground: 8.22:1 on background, 8.46:1 on card, 7.09:1 on muted
     * — AAA everywhere it can land. */
    --muted-foreground: oklch(0.42 0.006 250);

    /* Accent — the yellow kept for selection/hover wash, deep amber ink
     * 10.22:1. */
    --accent: oklch(0.9 0.1 95);
    --accent-foreground: oklch(0.3 0.06 80);

    /* ── Status ── deep fills, white labels, every pair ≥7:1 (AAA).
     * Warning at hue 55 (orange), far from primary's 80–95 (yellow). */
    --destructive: oklch(0.45 0.18 27);
    --destructive-foreground: oklch(0.99 0.005 27); /* 7.93:1 */
    --success: oklch(0.42 0.12 150);
    --success-foreground: oklch(0.99 0.005 150); /* 7.76:1 */
    --warning: oklch(0.45 0.13 55);
    --warning-foreground: oklch(0.99 0.005 55); /* 7.54:1 */
    --info: oklch(0.44 0.11 245);
    --info-foreground: oklch(0.99 0.005 245); /* 7.50:1 */

    /* Strong visible boundaries — 0.25 alpha ink, not a whisper. */
    --border: oklch(0.17 0.004 250 / 0.25);
    --input: oklch(0.17 0.004 250 / 0.3);
    --ring: oklch(0.42 0.11 80);

    /* Charts — amber lead, hues ≥60° apart (20/85/160/245/305), adjacent
     * lightness varied, all dark enough to read on white. */
    --chart-1: oklch(0.55 0.12 85);
    --chart-2: oklch(0.42 0.13 245);
    --chart-3: oklch(0.52 0.12 160);
    --chart-4: oklch(0.6 0.16 20);
    --chart-5: oklch(0.45 0.15 305);

    --sidebar: oklch(0.96 0.003 250);
    --sidebar-foreground: oklch(0.17 0.004 250); /* 17.02:1 */
    --sidebar-primary: oklch(0.42 0.11 80);
    --sidebar-primary-foreground: oklch(0.99 0.005 80);
    --sidebar-accent: oklch(0.9 0.1 95);
    --sidebar-accent-foreground: oklch(0.3 0.06 80);
    --sidebar-border: oklch(0.17 0.004 250 / 0.2);
    --sidebar-ring: oklch(0.42 0.11 80);

    /* Syntax — deep, high-contrast hues on white; comment stays ≥7:1. */
    --syntax-keyword: oklch(0.45 0.15 305);
    --syntax-string: oklch(0.42 0.11 150);
    --syntax-number: oklch(0.45 0.12 55);
    --syntax-comment: oklch(0.45 0.005 250);
    --syntax-function: oklch(0.44 0.12 245);
    --syntax-type: oklch(0.42 0.08 200);

    /* ── Chat surfaces ── user bubble is a deep charcoal panel with light
     * text (15.10:1); assistant is a white card with a strong border. */
    --chat-user-bg: oklch(0.25 0.005 250);
    --chat-user-fg: oklch(0.98 0.002 250);
    --chat-assistant-bg: oklch(1 0 0);
    --chat-assistant-fg: oklch(0.17 0.004 250);
    --chat-assistant-border: oklch(0.17 0.004 250 / 0.25);

    /* Modest radius — calm, legible geometry. */
    --radius: 0.5rem;

    /* ── Motion ── minimal and quick; springs alias to standard — the
     * personality is steadiness, never bounce. */
    --duration-fast: 120ms;
    --duration-base: 200ms;
    --duration-slow: 300ms;
    --duration-slower: 400ms;
    --duration-spring: 200ms;

    --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(0.2, 0, 0, 1);

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

    /* ── Typography ── access ramp: starts larger, generous line-heights,
     * caption never below 14px. */
    --text-hero-size: 3rem;
    --text-hero-lh: 1.1;
    --text-display-size: 2.5rem;
    --text-display-lh: 1.15;
    --text-headline-size: 1.875rem;
    --text-headline-lh: 1.25;
    --text-title-size: 1.5rem;
    --text-title-lh: 1.35;
    --text-subtitle-size: 1.25rem;
    --text-subtitle-lh: 1.45;
    --text-body-size: 1.125rem;
    --text-body-lh: 1.65;
    --text-label-size: 1rem;
    --text-label-lh: 1.5;
    --text-caption-size: 0.875rem; /* 14px — the floor, never below */
    --text-caption-lh: 1.4;

    /* ── Elevation ── low; borders carry separation. */
    --elevation-0: none;
    --elevation-1: 0 1px 2px oklch(0.17 0.004 250 / 0.06);
    --elevation-2: 0 1px 3px oklch(0.17 0.004 250 / 0.08), 0 1px 2px oklch(0.17 0.004 250 / 0.05);
    --elevation-3: 0 4px 8px -2px oklch(0.17 0.004 250 / 0.08), 0 2px 4px -2px oklch(0.17 0.004 250 / 0.05);
    --elevation-4: 0 12px 24px -6px oklch(0.17 0.004 250 / 0.1), 0 4px 8px -4px oklch(0.17 0.004 250 / 0.05);
    --elevation-5: 0 20px 40px -8px oklch(0.17 0.004 250 / 0.14);

    --spacing: 0.25rem;

    --border-width-thin: 1px;
    --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 identity. Near-black cool-neutral field (not #000 — avoids
 * halation), very light ink, cards stepping clearly lighter, strong
 * light-alpha borders, and the yellow-gold beam with near-black ink on top.
 * Popover sits above card, below muted (0.19 < 0.21 < 0.24).
 */
.dark {
    /* foreground/background 18.44:1. */
    --background: oklch(0.13 0.004 250);
    --foreground: oklch(0.97 0.002 250);

    /* Cards step clearly LIGHTER — visible surface, not a guess. 16.93:1. */
    --card: oklch(0.19 0.005 250);
    --card-foreground: oklch(0.97 0.002 250);

    --popover: oklch(0.21 0.005 250);
    --popover-foreground: oklch(0.97 0.002 250); /* 16.24:1 */

    /* Primary — the beam. Bright yellow-gold (hue 95, clear of warning's 60)
     * with near-black ink: 12.96:1. Beam vs field itself: 12.75:1. */
    --primary: oklch(0.85 0.16 95);
    --primary-foreground: oklch(0.11 0.01 95);

    --secondary: oklch(0.24 0.006 250);
    --secondary-foreground: oklch(0.93 0.003 250); /* 13.38:1 */

    --muted: oklch(0.24 0.006 250);
    /* muted-foreground: 10.05:1 on background, 9.23:1 on card, 8.22:1 on
     * muted — AAA on every field it can sit on. */
    --muted-foreground: oklch(0.78 0.005 250);

    /* Accent — dim gold wash with bright gold ink, 10.14:1. */
    --accent: oklch(0.3 0.05 95);
    --accent-foreground: oklch(0.9 0.12 95);

    /* ── Status ── bright fills, near-black ink (the beacon idiom), every
     * pair ≥7:1. Warning at orange 60 — primary holds yellow 95. */
    --destructive: oklch(0.7 0.19 30);
    --destructive-foreground: oklch(0.11 0.02 30); /* 7.06:1 */
    --success: oklch(0.8 0.19 145);
    --success-foreground: oklch(0.12 0.03 145); /* 11.57:1 */
    --warning: oklch(0.78 0.16 60);
    --warning-foreground: oklch(0.12 0.03 60); /* 9.72:1 */
    --info: oklch(0.78 0.1 230);
    --info-foreground: oklch(0.11 0.02 230); /* 10.43:1 */

    /* STRONG light-alpha borders — on near-black these do all separation. */
    --border: oklch(0.97 0.002 250 / 0.3);
    --input: oklch(0.97 0.002 250 / 0.35);
    --ring: oklch(0.85 0.16 95);

    /* Charts — gold lead, hues 25/95/160/240/305 (≥65° apart), adjacent
     * lightness varied, all bright enough to read on near-black. */
    --chart-1: oklch(0.85 0.16 95);
    --chart-2: oklch(0.68 0.13 240);
    --chart-3: oklch(0.78 0.14 160);
    --chart-4: oklch(0.7 0.17 25);
    --chart-5: oklch(0.6 0.15 305);

    --sidebar: oklch(0.16 0.004 250);
    --sidebar-foreground: oklch(0.97 0.002 250); /* 17.80:1 */
    --sidebar-primary: oklch(0.85 0.16 95);
    --sidebar-primary-foreground: oklch(0.11 0.01 95);
    --sidebar-accent: oklch(0.3 0.05 95);
    --sidebar-accent-foreground: oklch(0.9 0.12 95);
    --sidebar-border: oklch(0.97 0.002 250 / 0.25);
    --sidebar-ring: oklch(0.85 0.16 95);

    /* Syntax — bright, well-spaced hues on near-black. */
    --syntax-keyword: oklch(0.8 0.1 305);
    --syntax-string: oklch(0.82 0.12 150);
    --syntax-number: oklch(0.84 0.12 60);
    --syntax-comment: oklch(0.72 0.005 250);
    --syntax-function: oklch(0.8 0.09 230);
    --syntax-type: oklch(0.82 0.08 190);

    /* ── Chat surfaces (dark) ── user panel a step above muted; assistant
     * on the card surface with the strong border. User pair 14.24:1. */
    --chat-user-bg: oklch(0.26 0.008 250);
    --chat-user-fg: oklch(0.97 0.002 250);
    --chat-assistant-bg: oklch(0.19 0.005 250);
    --chat-assistant-fg: oklch(0.97 0.002 250);
    --chat-assistant-border: oklch(0.97 0.002 250 / 0.3);

    /* Elevation near-zero — borders are the separation system on near-black. */
    --elevation-1: 0 1px 2px oklch(0 0 0 / 0.4);
    --elevation-2: 0 1px 3px oklch(0 0 0 / 0.45), 0 1px 2px oklch(0 0 0 / 0.3);
    --elevation-3: 0 4px 8px -2px oklch(0 0 0 / 0.45), 0 2px 4px -2px oklch(0 0 0 / 0.3);
    --elevation-4: 0 12px 24px -6px oklch(0 0 0 / 0.5), 0 4px 8px -4px oklch(0 0 0 / 0.3);
    --elevation-5: 0 20px 40px -8px oklch(0 0 0 / 0.6);
}

/*
 * @layer base — Beacon's legibility-first philosophy.
 *
 * Larger type, generous leading, underlined links, strong boundaries, one
 * unmistakable accent. Nothing decorative; everything readable.
 */
@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);
    }

    /* Headings — Public Sans 600. `color: inherit` (NOT var(--foreground))
     * so headings recolor correctly inside tinted surfaces (alerts, chips,
     * status banners). */
    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: inherit;
    }

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

    /* Inline code — foreground-tint chip with foreground ink; never a
     * low-contrast pastel. */
    :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: 0.925em;
    }

    /* Selection — the gold wash by day. */
    ::selection {
        background: var(--accent);
        color: var(--accent-foreground);
    }

    /* Selection in the dark — the beam itself. */
    .dark ::selection {
        background: var(--primary);
        color: var(--primary-foreground);
    }

    /* Links — always underlined (never color-only affordance); underline
     * thickens on hover. Amber-brown by day, the yellow beam at night. */
    a {
        color: var(--primary);
        text-decoration-line: underline;
        text-decoration-thickness: 1px;
        text-underline-offset: 0.2em;
        transition: text-decoration-thickness var(--duration-fast) var(--ease-standard);
    }
    a:hover {
        text-decoration-thickness: 2px;
    }

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

/*
 * Focus-visible — Beacon's signature: a 3px solid ring, offset 2px, in the
 * theme's accent (deep amber by day, the yellow beam in the dark). Placed
 * outside @layer base so it beats Tailwind's default ring utilities.
 * Always visible; never outline: none without replacement.
 */
[data-slot="button"]:focus-visible,
[data-slot="select-trigger"]:focus-visible {
    outline: 3px solid var(--ring);
    outline-offset: 2px;
    box-shadow: none;
}

/* Inputs focus — border-color change + 2px ring (flush, no offset gap that
 * could read as a broken border). */
[data-slot="input"]:focus-visible,
[data-slot="textarea"]:focus-visible,
[data-slot="input"]:focus,
[data-slot="textarea"]:focus,
[data-slot="select-trigger"]:focus {
    outline: none;
    border-color: var(--ring);
    box-shadow: 0 0 0 2px var(--ring);
}

/* Buttons — steady weight, no transform theatrics; state reads through
 * opacity only, product-fast. */
[data-slot="button"] {
    font-weight: 600;
    min-height: 2.75rem;
}
[data-slot="button"]:hover:not(:disabled) {
    opacity: 0.92;
}
[data-slot="button"]:active:not(:disabled) {
    opacity: 0.84;
}

/* 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 — the 44px floor is GLOBAL, not behind a media query.
 * Motor-impairment doesn't correlate with pointer type. */
[data-slot="input"],
[data-slot="select-trigger"] {
    min-height: 2.75rem;
}
@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;
    }
}

/* Inputs — card surface, strong border, generous hit area. */
[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(--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: var(--muted-foreground);
}
[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(--foreground) 45%, transparent);
}

/* Reduced motion — zero transitions on every interactive slot; nothing
 * essential is motion-only. */
@media (prefers-reduced-motion: reduce) {
    a,
    [data-slot="button"],
    [data-slot="input"],
    [data-slot="textarea"],
    [data-slot="select-trigger"] {
        transition: none;
    }
}