/* ==========================================================================
   base.css — design tokens, reset, and the type scale.
   Owns: custom properties, element defaults, typography utilities.
   Owns nothing about layout. No section padding, no grid, no positioning.
   ========================================================================== */

/* --- Fonts ---------------------------------------------------------------
   Self-hosted so there is no third-party request on first paint.
   Archivo carries the display voice, Instrument Sans the reading voice,
   DM Mono the folios, figures, and index numerals.
   ---------------------------------------------------------------------- */

@font-face {
  font-family: 'Archivo';
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
  src: url('../public/fonts/archivo-latin.woff2') format('woff2');
  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: 'Archivo';
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
  src: url('../public/fonts/archivo-latin-ext.woff2') format('woff2');
  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: 'Instrument Sans';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../public/fonts/instrument-sans-latin.woff2') format('woff2');
  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';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../public/fonts/instrument-sans-latin-ext.woff2') format('woff2');
  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: 'DM Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../public/fonts/dm-mono-400-latin.woff2') format('woff2');
  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: 'DM Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../public/fonts/dm-mono-400-latin-ext.woff2') format('woff2');
  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: 'DM Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../public/fonts/dm-mono-500-latin.woff2') format('woff2');
  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: 'DM Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../public/fonts/dm-mono-500-latin-ext.woff2') format('woff2');
  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;
}

/* --- Tokens ----------------------------------------------------------- */

:root {
  /* Palette. Lemon is a fill, a mark, or a rule — never text on paper.
     Anything sitting on lemon is set in ink (15.1:1). */
  --paper: #ffffff;
  --ink: #0b0b0c;
  --lemon: #f2e600;
  --lemon-wash: #faf6c8;
  --ash: #6e6e73; /* 5.0:1 on paper */
  --rule: #e6e6e6;

  /* Families */
  --font-display: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Instrument Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI',
    Helvetica, Arial, sans-serif;
  --font-mono: 'DM Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* Type scale — fluid, clamped at both ends. */
  /* Tuned so "JOURNALIST//WRITER", the longest line, holds one line from
     375px up without ever touching the gutter. */
  --step-hero: clamp(1.75rem, 7.6vw, 7rem);
  --step-display: clamp(2rem, 5.2vw, 4rem);
  --step-title: clamp(1.375rem, 2.2vw, 1.875rem);
  --step-lead: clamp(1.125rem, 1.55vw, 1.5rem);
  --step-body: clamp(1rem, 0.55vw + 0.86rem, 1.125rem);
  --step-small: 0.9375rem;
  --step-mono: 0.8125rem;
  --step-label: 0.6875rem;

  /* Spacing — spacious by intent; the brief asks for white space. */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  /* Measures */
  --measure-prose: 62ch;
  --measure-narrow: 46ch;
  --page-max: 1560px;
  --gutter: clamp(1.25rem, 5vw, 6rem);

  /* Motion — subtle tier: 300–400ms, power1.out equivalent. */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-fast: 180ms;
  --dur: 320ms;
  --dur-slow: 620ms;
}

/* --- Reset ------------------------------------------------------------ */

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

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* Clears the sticky masthead when jumping to an anchor. */
  scroll-padding-top: 6rem;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-body);
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img,
picture,
svg {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* --- Typography ------------------------------------------------------- */

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 0.94;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

h1 {
  font-size: var(--step-hero);
  line-height: 0.9;
  letter-spacing: -0.04em;
}

h2 {
  font-size: var(--step-display);
}

h3 {
  font-size: var(--step-title);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

p {
  text-wrap: pretty;
}

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

/* Wide-tracked mono label. Lifted from the eyebrows in Utibe's own deck. */
.label {
  font-family: var(--font-mono);
  font-size: var(--step-label);
  font-weight: 500;
  letter-spacing: 0.2em;
  line-height: 1;
  text-transform: uppercase;
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--step-mono);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.lead {
  font-size: var(--step-lead);
  line-height: 1.45;
  letter-spacing: -0.01em;
}

.prose {
  max-width: var(--measure-prose);
}

.muted {
  color: var(--ash);
}

/* The signature mark: the // Utibe already uses to separate his roles. */
.slash {
  color: var(--lemon);
  font-weight: 900;
  /* Lemon on paper is decorative only — the roles either side carry meaning. */
}

/* --- Accessibility ---------------------------------------------------- */

:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 0;
  left: var(--space-2);
  z-index: 100;
  padding: var(--space-2) var(--space-3);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--step-label);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transform: translateY(-120%);
  transition: transform var(--dur-fast) var(--ease);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: -6px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}