/* ──────────────────────────────────────────────────────────────────────────
   ms-haushalt · global tokens, reset, and base typography.
   See .impeccable.md for the design context this expresses.
   ────────────────────────────────────────────────────────────────────────── */

@import "@fontsource-variable/geist";
@import "@fontsource-variable/geist-mono";

/* Figtree Variable — display + body face. SIL OFL, served from
   public/fonts. Roman + italic axes, weight 300–900. */
@font-face {
  font-family: "Figtree Variable";
  src: url("/fonts/Figtree-VariableFont_wght.woff2") format("woff2-variations");
  font-weight: 300 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Figtree Variable";
  src: url("/fonts/Figtree-Italic-VariableFont_wght.woff2") format("woff2-variations");
  font-weight: 300 900;
  font-style: italic;
  font-display: swap;
}

:root {
  /* ── Color (OKLCH, paper-feeling, two-hue flow palette) ───────────── */
  /* Background: warm uncoated stock, never pure white. Tinted toward the
     Aufwendungen hue family by 0.005-0.01 chroma per the impeccable
     "tint neutrals toward brand hue" principle. */
  --paper:        oklch(98.4% 0.006 60);
  --paper-deep:   oklch(96.0% 0.008 60);

  /* Ink: warmed near-black. Same principle inverted. */
  --ink:          oklch(20% 0.02 50);
  --ink-soft:     oklch(38% 0.02 55);
  --ink-mute:     oklch(58% 0.015 60);

  /* Hairlines & faint surfaces. */
  --rule:         oklch(86% 0.012 60);
  --rule-soft:    oklch(92% 0.008 60);

  /* Two-hue flow palette per design brief §9.5: deep purple for
     Aufwendungen (money leaving), orange for Erträge (money coming in).
     The two ranges sit on opposite sides of the label-contrast
     threshold so all labels on each flow's icicle can be a single
     colour: light text on the dark purples, dark text on the light
     oranges. Mirrors the JS PALETTE in src/lib/colors.ts. */
  --flow-aufwand-h: 295;    /* deep plum-purple */
  --flow-aufwand-c: 0.19;
  --flow-ertrag-h:  55;     /* warm orange / amber */
  --flow-ertrag-c:  0.15;

  /* Solid ink-on-paper renders of each flow accent (used for active
     toggle state, breadcrumb separators, slider handle, etc.). The
     accent uses Ldark / Llight values that match the bar palette's
     darkest-purple and lightest-readable-orange respectively. */
  --flow-aufwand:   oklch(34% var(--flow-aufwand-c) var(--flow-aufwand-h));
  --flow-ertrag:    oklch(68% var(--flow-ertrag-c)  var(--flow-ertrag-h));

  /* ── Spacing (4pt scale, semantic names) ──────────────────────────── */
  --space-2xs: 4px;
  --space-xs:  8px;
  --space-sm:  12px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* ── Type scale ───────────────────────────────────────────────────── */
  /* Display sizes are fluid (editorial, not app-chrome), per the
     typography rule. Body and UI sizes are fixed rem. The display
     range is intentionally tighter than the previous version — the
     hero needs to stay above the fold on a typical 13" laptop. */
  --size-display-1: clamp(2.625rem, 5.5vw + 1rem, 5.25rem);   /* hero stack */
  --size-display-2: clamp(1.75rem, 2.5vw + 0.5rem, 2.5rem);   /* sidebar heading */
  --size-display-3: 1.375rem;                                  /* secondary */

  --size-body:      1rem;     /* 16px */
  --size-body-lg:   1.0625rem;/* 17px lede */
  --size-caption:   0.8125rem;/* 13px */
  --size-eyebrow:   0.6875rem;/* 11px small caps */
  --size-micro:     0.75rem;  /* 12px sidebar dt labels */

  /* ── Faces ────────────────────────────────────────────────────────── */
  /* Display + body: Figtree (variable, SIL OFL, served from
     public/fonts). Numbers: Geist Mono. The `--face-serif` /
     `--face-sans` token names are legacy aliases — both now point to
     Figtree since it carries display and body alike. */
  --face-display: "Figtree Variable", -apple-system, BlinkMacSystemFont,
                  "Segoe UI", system-ui, sans-serif;
  --face-serif:   var(--face-display);
  --face-sans:    var(--face-display);
  --face-mono:    "Geist Mono Variable", "Geist Variable", ui-monospace,
                  "SF Mono", "Menlo", monospace;

  /* ── Layout rhythm ────────────────────────────────────────────────── */
  --measure:     65ch;
  --page-max:    1280px;
  --page-pad-x:  clamp(1rem, 4vw, 3rem);
}

/* ── Reset ──────────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  font-feature-settings:
    "kern" 1,
    "liga" 1,
    "calt" 1,
    "ss01" 1;
  /* German-specific OpenType: lining figures for tabular data, oldstyle
     elsewhere. Enabled per-element where useful. */
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--face-serif);
  font-size: var(--size-body);
  line-height: 1.55;
  font-feature-settings:
    "kern" 1,
    "liga" 1,
    "calt" 1;
  /* Slight optical correction for warmly-tinted paper background. */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

p {
  margin: 0 0 var(--space-md);
  max-width: var(--measure);
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--face-serif);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.01em;
  font-variant-ligatures: discretionary-ligatures;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

/* ── Utility patterns we use repeatedly ─────────────────────────────── */

.eyebrow {
  font-family: var(--face-sans);
  font-size: var(--size-eyebrow);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.caption {
  font-family: var(--face-sans);
  font-size: var(--size-caption);
  color: var(--ink-soft);
  line-height: 1.4;
}

.tabular {
  font-family: var(--face-mono);
  font-variant-numeric: tabular-nums lining-nums;
  font-feature-settings: "tnum" 1, "lnum" 1;
  letter-spacing: -0.01em;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}