/* Pinch design system: tokens, fonts, base elements.
   Every colour, size, radius and timing used in app.css and site.css comes from here.
   Fonts are self-hosted (assets/fonts, SIL OFL 1.1). No CDN. */

@font-face {
  font-family: "Geist";
  src: url("assets/fonts/Geist-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Geist Mono";
  src: url("assets/fonts/GeistMono-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ---------- light (default) ---------- */
:root {
  color-scheme: light;

  /* surfaces: a quiet stack, separated by tone, never by heavy borders */
  --bg: #f6f6f4;            /* page */
  --bg-raised: #ffffff;     /* panels, cards, the stage */
  --bg-sunken: #ececea;     /* wells, inputs, segmented tracks */
  --bg-hover: #e4e4e1;
  --line: rgba(17, 18, 20, 0.08);     /* hairline only inside UI controls */
  --line-strong: rgba(17, 18, 20, 0.14);

  /* ink */
  --ink: #111214;
  --ink-2: #4a4c52;         /* secondary text */
  --ink-3: #686b72;         /* tertiary, placeholders (4.5:1 on --bg-sunken) */
  --ink-inverse: #ffffff;

  /* one accent: signal blue. It marks the primary action, focus and the compare divider. */
  --accent: #2f5cff;
  --accent-hover: #2149e6;
  --accent-ink: #ffffff;
  --accent-soft: rgba(47, 92, 255, 0.10);

  /* meaning, separate from the accent */
  --good: #076a3d;          /* good, warn, bad: 4.5:1 as text on their own tint, even on --bg-hover */
  --good-soft: rgba(15, 138, 82, 0.12);
  --warn: #8f4b00;
  --warn-soft: rgba(178, 94, 0, 0.12);
  --bad: #ad2020;
  --bad-soft: rgba(209, 47, 47, 0.10);

  /* the stage behind images: a neutral checkerboard shows transparency */
  --stage: #e9e9e6;
  --check-a: #e9e9e6;
  --check-b: #dededa;

  /* elevation: only for things that float above the page (popovers, dialogs, the dragged file) */
  --shadow-float: 0 1px 2px rgba(17, 18, 20, 0.06), 0 8px 24px rgba(17, 18, 20, 0.10), 0 24px 64px rgba(17, 18, 20, 0.08);
  --shadow-panel: 0 1px 0 rgba(17, 18, 20, 0.04), 0 1px 3px rgba(17, 18, 20, 0.05);

  /* type */
  --font: "Geist", ui-sans-serif, -apple-system, "Segoe UI", system-ui, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Consolas, monospace;   /* keyboard keys and file sizes in tight UI only */

  --text-xs: 0.75rem;      /* 12  captions in dense UI */
  --text-sm: 0.8125rem;    /* 13  UI labels */
  --text-base: 0.9375rem;  /* 15  UI body */
  --text-md: 1.0625rem;    /* 17  reading text */
  --text-lg: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);        /* 20-24 lead */
  --text-xl: clamp(1.75rem, 1.3rem + 1.6vw, 2.75rem);       /* 28-44 section titles */
  --text-2xl: clamp(2.5rem, 1.4rem + 4.2vw, 5.25rem);       /* 40-84 page title */

  --leading-tight: 1.04;
  --leading-snug: 1.25;
  --leading-body: 1.55;
  --tracking-display: -0.035em;
  --tracking-title: -0.025em;
  --tracking-ui: -0.006em;

  /* space: 4px grid */
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 20px; --s-6: 24px;
  --s-8: 32px; --s-10: 40px; --s-12: 48px; --s-16: 64px; --s-20: 80px; --s-24: 96px; --s-32: 128px;
  --gutter: clamp(16px, 3vw, 40px);       /* page side margin */
  --content: 1240px;                       /* widest content column */

  /* shape: one family of radii, nested so inner = outer - padding */
  --r-xs: 6px; --r-sm: 8px; --r-md: 12px; --r-lg: 18px; --r-xl: 24px; --r-full: 999px;

  /* motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.4, 0.64, 1);
  --t-fast: 120ms; --t-base: 200ms; --t-slow: 420ms;

  --focus: 0 0 0 3px var(--bg-raised), 0 0 0 5px var(--accent);
}

/* ---------- dark ---------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0c0d0f;
    --bg-raised: #16171a;
    --bg-sunken: #0f1012;
    --bg-hover: #222328;
    --line: rgba(255, 255, 255, 0.07);
    --line-strong: rgba(255, 255, 255, 0.13);
    --ink: #f3f3f2;
    --ink-2: #a9abb1;
    --ink-3: #8a8c93;
    --ink-inverse: #0c0d0f;
    --accent: #4566ff;
    --accent-hover: #3f62ff;
    --accent-ink: #ffffff;
    --accent-soft: rgba(92, 125, 255, 0.16);
    --good: #3ccf8e; --good-soft: rgba(60, 207, 142, 0.14);
    --warn: #f0a23b; --warn-soft: rgba(240, 162, 59, 0.14);
    --bad: #ff6b6b; --bad-soft: rgba(255, 107, 107, 0.14);
    --stage: #101113; --check-a: #141518; --check-b: #1b1c20;
    --shadow-float: 0 1px 2px rgba(0, 0, 0, 0.5), 0 12px 32px rgba(0, 0, 0, 0.45), 0 32px 80px rgba(0, 0, 0, 0.35);
    --shadow-panel: 0 0 0 1px rgba(255, 255, 255, 0.05);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0c0d0f;
  --bg-raised: #16171a;
  --bg-sunken: #0f1012;
  --bg-hover: #222328;
  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(255, 255, 255, 0.13);
  --ink: #f3f3f2;
  --ink-2: #a9abb1;
  --ink-3: #8a8c93;
  --ink-inverse: #0c0d0f;
  --accent: #4566ff;
  --accent-hover: #3f62ff;
  --accent-ink: #ffffff;
  --accent-soft: rgba(92, 125, 255, 0.16);
  --good: #3ccf8e; --good-soft: rgba(60, 207, 142, 0.14);
  --warn: #f0a23b; --warn-soft: rgba(240, 162, 59, 0.14);
  --bad: #ff6b6b; --bad-soft: rgba(255, 107, 107, 0.14);
  --stage: #101113; --check-a: #141518; --check-b: #1b1c20;
  --shadow-float: 0 1px 2px rgba(0, 0, 0, 0.5), 0 12px 32px rgba(0, 0, 0, 0.45), 0 32px 80px rgba(0, 0, 0, 0.35);
  --shadow-panel: 0 0 0 1px rgba(255, 255, 255, 0.05);
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: 72px; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font); font-size: var(--text-base); line-height: var(--leading-body);
  letter-spacing: var(--tracking-ui); font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility;
  overflow-x: clip;
}
h1, h2, h3, h4, p, figure, blockquote, ul, ol, dl, dd { margin: 0; }
ul[class], ol[class] { padding: 0; list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; letter-spacing: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; }
h1, h2, h3 { font-weight: 600; text-wrap: balance; letter-spacing: var(--tracking-title); line-height: var(--leading-snug); }
p { text-wrap: pretty; }
::selection { background: var(--accent-soft); color: var(--ink); }
:focus-visible { outline: none; box-shadow: var(--focus); border-radius: var(--r-xs); }
[hidden] { display: none !important; }
.num { font-variant-numeric: tabular-nums; }
.vh { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
kbd { font-family: var(--font-mono); font-size: 0.85em; padding: 0.1em 0.4em; border-radius: var(--r-xs); background: var(--bg-sunken); box-shadow: inset 0 -1px 0 var(--line-strong); }

/* ---------- shared controls ---------- */
.btn {
  --h: 36px;
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  height: var(--h); padding: 0 var(--s-4); border-radius: var(--r-full);
  font-size: var(--text-sm); font-weight: 550; white-space: nowrap; text-decoration: none;
  transition: background-color var(--t-fast), color var(--t-fast), transform var(--t-fast) var(--ease-out), box-shadow var(--t-fast);
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.97); }
.btn[disabled] { opacity: 0.4; pointer-events: none; }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ink { background: var(--ink); color: var(--ink-inverse); }
.btn-ink:hover { opacity: 0.88; }
.btn-quiet { background: var(--bg-sunken); color: var(--ink); }
.btn-quiet:hover { background: var(--bg-hover); }
.btn-ghost { color: var(--ink-2); }
.btn-ghost:hover { background: var(--bg-sunken); color: var(--ink); }
.btn-lg { --h: 48px; padding: 0 var(--s-6); font-size: var(--text-base); }
.btn-icon { width: var(--h); padding: 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; scroll-behavior: auto !important; }
}