/*
  Bytepleat design tokens v1 (palette revision: see DESIGN.md, "Revision: palette")
  Source of truth: DESIGN.md (same folder).
  No external requests. Fonts are self-hosted; set the url() paths to wherever
  the woff2 files are shipped (desktop: src-tauri bundle; site: assets/fonts/).

  Theme selection:
    - default follows the OS via prefers-color-scheme
    - <html data-theme="light"> or <html data-theme="dark"> overrides it
*/

/* ---------- Fonts (OFL-1.1, self-hosted from design/fonts) ----------
   Site copy: paths point at assets/fonts/, and Instrument Sans ships as the
   two Google-subset files (latin + latin-ext) selected by unicode-range. */
@font-face {
  font-family: "Instrument Sans";
  src: url("fonts/InstrumentSans-latin.woff2") format("woff2");
  font-weight: 400 700;
  font-stretch: 75% 100%;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Instrument Sans";
  src: url("fonts/InstrumentSans-latin-ext.woff2") format("woff2");
  font-weight: 400 700;
  font-stretch: 75% 100%;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("fonts/JetBrainsMono-latin.woff2") format("woff2");
  font-weight: 400 600;
  font-style: normal;
  font-display: swap;
}

:root {
  /* ---------- Raw palette (do not use directly in components) ---------- */
  /* raw-mint keeps its name for compatibility; it is now a pale indigo tint. */
  --raw-ink: #1e2025;
  --raw-paper: #f6f4ef;
  --raw-sheet: #fffdf9;
  --raw-pleat: #2f3e86;
  --raw-pleat-deep: #232f6b;
  --raw-mint: #dfe3f1;
  --raw-fold-light: #ecebe6;
  --raw-fold-shade: #dedbd2;
  --raw-crease: #d8d5cb;
  --raw-crease-strong: #8a877c;
  --raw-muted: #5c5a52;
  --raw-caution: #8a5d12;
  --raw-danger: #a13b36;

  --raw-night-paper: #121315;
  --raw-night-sheet: #1b1d21;
  --raw-night-raised: #23262b;
  --raw-night-ink: #e7e5e0;
  --raw-night-muted: #a6a39b;
  --raw-night-pleat: #a9b8ef;
  --raw-night-pleat-ink: #111a44;
  --raw-night-mint: #2a3150;
  --raw-night-fold-light: #22242a;
  --raw-night-fold-shade: #17181c;
  --raw-night-crease: #2e3137;
  --raw-night-crease-strong: #6f6c65;
  --raw-night-caution: #d9a95c;
  --raw-night-danger: #ec8a80;

  /* ---------- Semantic colour: light (default) ---------- */
  color-scheme: light;
  --color-bg: var(--raw-paper);            /* window / page */
  --color-surface: var(--raw-sheet);       /* the sheet: lists, panels */
  --color-surface-raised: var(--raw-sheet);
  --color-text: var(--raw-ink);            /* 14.8:1 on bg */
  --color-text-muted: var(--raw-muted);    /* 6.3:1 on bg */
  --color-border: var(--raw-crease);       /* decorative hairlines */
  --color-border-strong: var(--raw-crease-strong); /* inputs, checkboxes: 3.3:1 */
  --color-accent: var(--raw-pleat);        /* links, primary fill: 8.9:1 */
  --color-accent-hover: var(--raw-pleat-deep);
  --color-on-accent: #ffffff;              /* 9.8:1 on accent */
  --color-selection: var(--raw-mint);      /* selected rows, drop target */
  --color-on-selection: var(--raw-ink);    /* 12.7:1 */
  --color-fold-light: var(--raw-fold-light); /* pleat face lit */
  --color-fold-shade: var(--raw-fold-shade); /* pleat face in shadow */
  --color-caution: var(--raw-caution);     /* 5.2:1 on bg */
  --color-caution-bg: #f1ece0;
  --color-caution-text: #6e4c10;           /* 6.6:1 on caution-bg */
  --color-danger: var(--raw-danger);       /* 6.0:1 on bg */
  --color-danger-bg: #f5e6e4;
  --color-danger-text: var(--raw-danger);  /* 5.4:1 on danger-bg */
  --color-success: var(--raw-pleat);
  --color-backdrop: rgb(30 32 37 / 0.32);

  /* ---------- Typography ---------- */
  --font-sans: "Instrument Sans", ui-sans-serif, system-ui, -apple-system,
    "Segoe UI", "Adwaita Sans", "Cantarell", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Mono",
    "Adwaita Mono", Menlo, monospace;

  /* App scale (px; minimum 13) */
  --app-text-caption: 0.8125rem;  /* 13 / 18, wght 450 */
  --app-text-body: 0.875rem;      /* 14 / 20, wght 400 */
  --app-text-strong: 0.875rem;    /* 14 / 20, wght 600 */
  --app-text-subhead: 1rem;       /* 16 / 22, wght 600 */
  --app-text-title: 1.25rem;      /* 20 / 26, wght 600, wdth 96 */
  --app-text-display: 1.75rem;    /* 28 / 32, wght 650, wdth 92 */
  --app-lh-caption: 1.125rem;
  --app-lh-body: 1.25rem;
  --app-lh-subhead: 1.375rem;
  --app-lh-title: 1.625rem;
  --app-lh-display: 2rem;

  /* Site scale (fluid, 360px -> 1440px) */
  --site-text-small: 0.875rem;                                  /* 14 / 1.5 */
  --site-text-body: 1.0625rem;                                  /* 17 / 1.6 */
  --site-text-lead: clamp(1.125rem, 1.05rem + 0.35vw, 1.3125rem); /* 18 -> 21 / 1.5 */
  --site-text-h3: clamp(1.1875rem, 1.12rem + 0.3vw, 1.375rem);    /* 19 -> 22 / 1.3 */
  --site-text-h2: clamp(1.625rem, 1.4rem + 1vw, 2.25rem);         /* 26 -> 36 / 1.15 */
  --site-text-h1: clamp(2.375rem, 1.8rem + 2.6vw, 4rem);          /* 38 -> 64 / 1.02 */

  --weight-regular: 400;
  --weight-book: 450;
  --weight-semibold: 600;
  --weight-bold: 650;
  --stretch-normal: 100%;
  --stretch-title: 96%;
  --stretch-display: 88%;          /* site h1 only: compact, never below 85% */
  --tracking-display: -0.022em;
  --tracking-title: -0.012em;
  --tracking-body: 0;
  --measure: 68ch;                 /* body line length, hard cap 78ch */

  /* ---------- Spacing (4px base) ---------- */
  --space-1: 0.25rem;  /* 4 */
  --space-2: 0.5rem;   /* 8 */
  --space-3: 0.75rem;  /* 12 */
  --space-4: 1rem;     /* 16 */
  --space-5: 1.5rem;   /* 24 */
  --space-6: 2rem;     /* 32 */
  --space-7: 3rem;     /* 48 */
  --space-8: 4rem;     /* 64 */
  --space-9: 6rem;     /* 96 */
  --gutter-site: clamp(1rem, 0.6rem + 2vw, 2.5rem);
  --row-height: 2.25rem;           /* 36: list rows, min hit target */
  --control-height: 2.25rem;       /* 36: buttons, inputs */
  --control-height-lg: 2.75rem;    /* 44: primary action in action band */

  /* ---------- Radii by role ---------- */
  --radius-control: 6px;    /* buttons, inputs, segmented control */
  --radius-check: 4px;      /* checkboxes */
  --radius-sheet: 10px;     /* list sheet, drop zone, panels */
  --radius-dialog: 14px;    /* dialogs, toasts */
  --radius-window: 0;       /* OS draws the window frame */
  --radius-pill: 999px;     /* status chips only */

  /* ---------- Shadows by role (light) ---------- */
  --shadow-none: none;
  --shadow-sheet: 0 0 0 1px var(--color-border);
  --shadow-raised: 0 1px 0 rgb(30 32 37 / 0.06), 0 2px 6px rgb(30 32 37 / 0.08);
  --shadow-dialog: 0 0 0 1px rgb(30 32 37 / 0.08), 0 12px 32px rgb(30 32 37 / 0.18);
  --shadow-fold: inset 0 -1px 0 rgb(30 32 37 / 0.10); /* crease line under a pleat face */

  /* ---------- Motion ---------- */
  --dur-instant: 83ms;       /* hover, press */
  --dur-fast: 167ms;         /* state swaps, checkbox, tab */
  --dur-normal: 250ms;       /* panel enter/exit, toasts */
  --dur-fold: 520ms;         /* signature fold / unfold */
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-enter: cubic-bezier(0, 0, 0, 1);       /* Fluent fast-out, slow-in */
  --ease-exit: cubic-bezier(0.3, 0, 1, 1);
  --ease-fold: cubic-bezier(0.65, 0, 0.25, 1);  /* weighted, like cloth settling */

  /* ---------- Focus ---------- */
  --focus-width: 2px;
  --focus-offset: 2px;
  --focus-color: var(--color-accent);
  --focus-ring: 0 0 0 var(--focus-offset) var(--color-bg),
    0 0 0 calc(var(--focus-offset) + var(--focus-width)) var(--focus-color);

  /* ---------- Layout ---------- */
  --app-min-width: 960px;
  --app-min-height: 640px;
  --app-band-height: 4.5rem;       /* 72: bottom action band */
  --app-side-panel: 18rem;         /* 288: recent panel at >= 1200px */
  --site-max: 72rem;               /* 1152 content width */
}

/* ---------- Dark: follows OS unless forced light ---------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --color-bg: var(--raw-night-paper);
    --color-surface: var(--raw-night-sheet);
    --color-surface-raised: var(--raw-night-raised);
    --color-text: var(--raw-night-ink);           /* 14.8:1 */
    --color-text-muted: var(--raw-night-muted);   /* 7.4:1 */
    --color-border: var(--raw-night-crease);
    --color-border-strong: var(--raw-night-crease-strong); /* 3.6:1 */
    --color-accent: var(--raw-night-pleat);       /* 9.6:1 */
    --color-accent-hover: #c4cff7;
    --color-on-accent: var(--raw-night-pleat-ink); /* 8.6:1 */
    --color-selection: var(--raw-night-mint);
    --color-on-selection: var(--raw-night-ink);   /* 10.1:1 */
    --color-fold-light: var(--raw-night-fold-light);
    --color-fold-shade: var(--raw-night-fold-shade);
    --color-caution: var(--raw-night-caution);
    --color-caution-bg: #2a2317;
    --color-caution-text: var(--raw-night-caution);
    --color-danger: var(--raw-night-danger);
    --color-danger-bg: #2e1d1b;
    --color-danger-text: var(--raw-night-danger);
    --color-success: var(--raw-night-pleat);
    --color-backdrop: rgb(0 0 0 / 0.5);
    --shadow-sheet: 0 0 0 1px var(--color-border);
    --shadow-raised: 0 0 0 1px var(--color-border), 0 2px 6px rgb(0 0 0 / 0.35);
    --shadow-dialog: 0 0 0 1px var(--color-border), 0 16px 40px rgb(0 0 0 / 0.55);
    --shadow-fold: inset 0 -1px 0 rgb(0 0 0 / 0.45);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: var(--raw-night-paper);
  --color-surface: var(--raw-night-sheet);
  --color-surface-raised: var(--raw-night-raised);
  --color-text: var(--raw-night-ink);
  --color-text-muted: var(--raw-night-muted);
  --color-border: var(--raw-night-crease);
  --color-border-strong: var(--raw-night-crease-strong);
  --color-accent: var(--raw-night-pleat);
  --color-accent-hover: #c4cff7;
  --color-on-accent: var(--raw-night-pleat-ink);
  --color-selection: var(--raw-night-mint);
  --color-on-selection: var(--raw-night-ink);
  --color-fold-light: var(--raw-night-fold-light);
  --color-fold-shade: var(--raw-night-fold-shade);
  --color-caution: var(--raw-night-caution);
  --color-caution-bg: #2a2317;
  --color-caution-text: var(--raw-night-caution);
  --color-danger: var(--raw-night-danger);
  --color-danger-bg: #2e1d1b;
  --color-danger-text: var(--raw-night-danger);
  --color-success: var(--raw-night-pleat);
  --color-backdrop: rgb(0 0 0 / 0.5);
  --shadow-sheet: 0 0 0 1px var(--color-border);
  --shadow-raised: 0 0 0 1px var(--color-border), 0 2px 6px rgb(0 0 0 / 0.35);
  --shadow-dialog: 0 0 0 1px var(--color-border), 0 16px 40px rgb(0 0 0 / 0.55);
  --shadow-fold: inset 0 -1px 0 rgb(0 0 0 / 0.45);
}

/* ---------- Reduced motion: keep state changes, drop travel ---------- */
@media (prefers-reduced-motion: reduce) {
  :root {
    --dur-instant: 0ms;
    --dur-fast: 0ms;
    --dur-normal: 120ms;   /* opacity-only crossfades are allowed */
    --dur-fold: 0ms;       /* fold shows end state immediately */
  }
}

/* ---------- Forced colours (Windows High Contrast) ---------- */
@media (forced-colors: active) {
  :root {
    --focus-color: Highlight;
    --color-border: CanvasText;
    --color-border-strong: CanvasText;
  }
}

/* ---------- Base usage (minimal, safe to include) ---------- */
:focus-visible {
  outline: var(--focus-width) solid var(--focus-color);
  outline-offset: var(--focus-offset);
}