@import "../styles/globals.css";

/* The @font-face rules are deliberately NOT here. Bun's CSS bundler resolves
   every url() from disk and inlines woff2 as base64 — relative OR absolute,
   and `loader: { ".woff2": "file" }` does not change it. That made this file
   303 KB of render-blocking bytes and defeated the unicode-range subsetting,
   since a subset embedded in the stylesheet downloads whether or not one
   character needs it. They live in src/fontCss.ts and are injected at boot by
   src/frontend.tsx, which is the only arrangement that is identical in dev and
   in a subpath production build without a placeholder file. The cost is that
   the faces are requested after the JS parses rather than from the HTML;
   `font-display: swap` keeps text readable throughout. */

/*
 * ============================================================================
 * Budget 2.0 design foundation
 * ============================================================================
 *
 * Two layers, deliberately separate:
 *
 *   1. `--budget-*` semantic tokens, defined once per theme below. These are
 *      the app's own vocabulary — paper, ink, rule, surplus, overspend — and
 *      are the ONLY colours the app's own components should name.
 *   2. shadcn's variable set, pointed at layer 1. Re-theming shadcn rather
 *      than fighting it means every primitive (dialog, select, badge, button)
 *      inherits both themes for free.
 *
 * WHY THE PAIRS MATTER. AGENTS.md's rule is "never define a bare `--accent`",
 * and it was paid for with an app-wide contrast bug: shadcn uses `--accent` as
 * a hover BACKGROUND and `--accent-foreground` as the text on it, so setting
 * one without the other repaints the background and leaves the text behind.
 * Every shadcn pair below is therefore redefined TOGETHER, in both themes.
 *
 * The brand teal is `--primary`, NOT `--accent`. That is the mapping the
 * earlier bug got wrong: shadcn's `--accent` is a subtle hover tint, and a
 * saturated teal there turns every hover into a coloured slab with dark text
 * on it. `--accent` stays a tint of the surface.
 *
 * Every text pair here was measured, not eyeballed: the weakest is 5.50:1
 * (muted on paper, light theme) against a 4.5:1 requirement, and field
 * borders clear the 3:1 non-text requirement on both of their backgrounds.
 */

:root {
  /* --- Layer 1: the app's own vocabulary (light) --- */
  --budget-paper: #f3f5f7; /* page ground: cool statement paper, NOT cream */
  --budget-raised: #ffffff; /* cards and rows sitting above the paper */
  --budget-ink: #16212b; /* primary text: ink navy, not black */
  --budget-ink-muted: #546575; /* labels, captions, secondary figures */
  --budget-rule: #dce3e9; /* hairlines between rows */
  --budget-rule-strong: #768899; /* field borders; needs 3:1, hairlines do not */
  --budget-accent: #0d6b60; /* muted teal: links, primary actions, spend fill */
  --budget-accent-ink: #ffffff; /* text ON the teal */
  --budget-tint: #e8edf1; /* hover wash, table header fill */
  --surplus: #1f6640; /* carried-forward surplus */
  --overspend: #a5382a; /* negative balances only */

  /* Elevation is light and cool, never a grey drop shadow. */
  --budget-shadow-card: 0 1px 2px rgb(22 33 43 / 0.04), 0 8px 24px -12px rgb(22 33 43 / 0.12);
  --budget-shadow-raised: 0 1px 1px rgb(22 33 43 / 0.05), 0 2px 6px -2px rgb(22 33 43 / 0.08);

  --font-display: "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-money: "JetBrains Mono", ui-monospace, "SF Mono", monospace;

  /* --- Layer 2: shadcn, pointed at layer 1. Pairs, always. --- */
  --radius: 0.5rem; /* crisper than shadcn's 0.625rem default */

  --background: var(--budget-paper);
  --foreground: var(--budget-ink);
  --card: var(--budget-raised);
  --card-foreground: var(--budget-ink);
  --popover: var(--budget-raised);
  --popover-foreground: var(--budget-ink);
  --primary: var(--budget-accent);
  --primary-foreground: var(--budget-accent-ink);
  --secondary: var(--budget-tint);
  --secondary-foreground: var(--budget-ink);
  --muted: var(--budget-tint);
  --muted-foreground: var(--budget-ink-muted);
  --accent: var(--budget-tint); /* a TINT. see the note above. */
  --accent-foreground: var(--budget-ink); /* its pair, never omitted. */
  --destructive: var(--overspend);
  --border: var(--budget-rule);
  --input: var(--budget-rule-strong);
  --ring: var(--budget-accent);
}

.dark {
  /* --- Layer 1 (dark). Deep slate, never pure black: a pure-black ground
         makes the hairlines and the carry meter float. --- */
  --budget-paper: #0c1319;
  --budget-raised: #141e28;
  --budget-ink: #e8eef4;
  --budget-ink-muted: #94a7b8;
  --budget-rule: #22303e;
  --budget-rule-strong: #647c92;
  --budget-accent: #3ab5a4; /* lifted: the light teal is unreadable on slate */
  --budget-accent-ink: #08110f; /* dark text on the lifted teal, not white */
  --budget-tint: #1c2836;
  --surplus: #57bb83;
  --overspend: #f0866a;

  /* Dark elevation reads as a lighter surface plus a hairline, not a shadow:
     shadows are invisible on a dark ground. */
  --budget-shadow-card: 0 1px 0 rgb(255 255 255 / 0.04) inset, 0 12px 32px -16px rgb(0 0 0 / 0.7);
  --budget-shadow-raised: 0 1px 0 rgb(255 255 255 / 0.03) inset;

  /* --- Layer 2 (dark). Same pairs, same rule. --- */
  --background: var(--budget-paper);
  --foreground: var(--budget-ink);
  --card: var(--budget-raised);
  --card-foreground: var(--budget-ink);
  --popover: var(--budget-raised);
  --popover-foreground: var(--budget-ink);
  --primary: var(--budget-accent);
  --primary-foreground: var(--budget-accent-ink);
  --secondary: var(--budget-tint);
  --secondary-foreground: var(--budget-ink);
  --muted: var(--budget-tint);
  --muted-foreground: var(--budget-ink-muted);
  --accent: var(--budget-tint);
  --accent-foreground: var(--budget-ink);
  --destructive: var(--overspend);
  --border: var(--budget-rule);
  --input: var(--budget-rule-strong);
  --ring: var(--budget-accent);
}

/* Makes `font-sans` / `font-mono` utilities and shadcn primitives inherit the
   shipped faces instead of the OS stack. */
@theme inline {
  --font-sans: var(--font-body);
  --font-mono: var(--font-money);
  --color-budget-accent: var(--budget-accent);
  --color-budget-paper: var(--budget-paper);
  --color-budget-raised: var(--budget-raised);
  --color-budget-rule: var(--budget-rule);
  --color-budget-ink: var(--budget-ink);
  --color-budget-ink-muted: var(--budget-ink-muted);
  --color-surplus: var(--surplus);
  --color-overspend: var(--overspend);
}

@layer base {
  :root {
    color-scheme: light;
    /* The parts the browser draws for itself. `accent-color` is what tints a
       native radio or checkbox — left unset it is the platform blue, which is
       the one colour on screen belonging to no theme here. */
    accent-color: var(--budget-accent);
  }

  .dark {
    color-scheme: dark;
  }

  ::selection {
    background: var(--budget-accent);
    color: var(--budget-accent-ink);
  }

  body {
    /* Was `grid place-items-center`, which centred short pages VERTICALLY —
       the month view floated in the middle of the viewport on an empty month.
       The app shell owns horizontal centring now, with a max width. */
    @apply m-0 min-w-[320px] min-h-screen bg-background text-foreground antialiased;
    font-family: var(--font-body);
    font-feature-settings: "cv11"; /* Inter's single-storey a-alternates off */
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-family: var(--font-display);
    font-weight: 640;
    letter-spacing: -0.019em;
    text-wrap: balance;
  }

  /* One visible, consistent focus treatment. Keyboard users get a ring on the
     accent colour, which clears 3:1 on every surface in both themes.
     Deliberately the ONLY focus indicator: shadcn's primitives ship a second,
     softer `ring` box-shadow of their own, and the two together read as a halo
     inside a line. Those are stripped in button.tsx and input.tsx instead of
     dropping this, because this one rule covers links, table buttons and
     anything else that never goes through a primitive.
     It sets no border-radius on purpose — an earlier version pinned 2px here,
     which squared the corners of every control that had no radius utility of
     its own. The outline follows each element's own radius. */
  :focus-visible {
    outline: 2px solid var(--budget-accent);
    outline-offset: 2px;
  }
}

@layer utilities {
  /* Applied to every money figure: mono face, tabular digits so columns of
     numbers align on the decimal without a monospaced layout everywhere. */
  .font-money {
    font-family: var(--font-money);
    font-variant-numeric: tabular-nums;
    font-feature-settings: "zero"; /* slashed zero: 0 vs O at a glance */
    letter-spacing: -0.01em;
  }

  .text-overspend {
    color: var(--overspend);
  }

  .text-surplus {
    color: var(--surplus);
  }

  /* The one card treatment, so elevation cannot drift screen to screen. */
  .budget-card {
    background: var(--budget-raised);
    border: 1px solid var(--budget-rule);
    border-radius: var(--radius);
    box-shadow: var(--budget-shadow-card);
  }
}

@keyframes spin {
  from {
    transform: rotate(0);
  }
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion) {
  *,
  ::before,
  ::after {
    animation: none !important;
    transition: none !important;
  }
}