/*
 * Hairline — CSS Reset for Editorial Layouts
 * v1.0.0 · github.com/nsimona/hairline
 *
 * A surgical reset for type-first, reading-first interfaces.
 * Not a framework. Not a component library. Just honest defaults.
 *
 * Table of Contents
 * ─────────────────────────────────────────────────
 *  0. Tokens
 *  1. Box Model
 *  2. Document & Body
 *  3. Typography
 *  4. Headings
 *  5. Body Copy
 *  6. Lists
 *  7. Links
 *  8. Media
 *  9. Tables
 * 10. Forms & Interactive
 * 11. Sectioning
 * 12. Code & Pre
 * 13. Horizontal Rule
 * 14. Utilities
 * 15. Print
 * ─────────────────────────────────────────────────
 */


/* ─── 0. Tokens ─────────────────────────────────────────────────────────── */

:root {
  /* Type scale — minor third (1.200) */
  --text-xs:   0.694rem;
  --text-sm:   0.833rem;
  --text-base: 1rem;
  --text-md:   1.2rem;
  --text-lg:   1.44rem;
  --text-xl:   1.728rem;
  --text-2xl:  2.074rem;
  --text-3xl:  2.488rem;
  --text-4xl:  2.986rem;
  --text-5xl:  3.583rem;

  /* Spacing — 8-point grid */
  --space-1:  0.25rem;   /*  4px */
  --space-2:  0.5rem;    /*  8px */
  --space-3:  0.75rem;   /* 12px */
  --space-4:  1rem;      /* 16px */
  --space-6:  1.5rem;    /* 24px */
  --space-8:  2rem;      /* 32px */
  --space-12: 3rem;      /* 48px */
  --space-16: 4rem;      /* 64px */
  --space-24: 6rem;      /* 96px */
  --space-32: 8rem;      /* 128px */

  /* Measure — optimal line width for reading */
  --measure:        65ch;
  --measure-narrow: 45ch;
  --measure-wide:   80ch;

  /* Leading */
  --leading-tight:  1.2;
  --leading-snug:   1.35;
  --leading-normal: 1.6;
  --leading-loose:  1.8;

  /* Tracking */
  --tracking-tight:  -0.02em;
  --tracking-normal:  0em;
  --tracking-wide:    0.04em;
  --tracking-wider:   0.08em;
  --tracking-widest:  0.16em;

  /* Ink & surface */
  --color-ink:          hsl(220 20% 10%);
  --color-ink-muted:    hsl(220 12% 42%);
  --color-ink-faint:    hsl(220 10% 68%);
  --color-ink-hairline: hsl(220 10% 88%);
  --color-surface:      hsl(0 0% 99%);
  --color-surface-alt:  hsl(220 14% 97%);
  --color-accent:       hsl(220 80% 48%);
  --color-accent-muted: hsl(220 50% 92%);

  /* Border */
  --border-hairline: 1px solid var(--color-ink-hairline);
  --border-thin:     1px solid var(--color-ink-faint);
  --border-medium:   2px solid var(--color-ink);

  /* Radius */
  --radius-sm: 2px;
  --radius:    4px;
  --radius-lg: 8px;

  /* Focus */
  --focus-ring: 0 0 0 3px var(--color-accent-muted),
                0 0 0 1px var(--color-accent);

  /* Motion */
  --duration-fast:   120ms;
  --duration-normal: 200ms;
  --duration-slow:   350ms;
  --ease-out-expo:   cubic-bezier(0.19, 1, 0.22, 1);
  --ease-in-out:     cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode — system preference */
@media (prefers-color-scheme: dark) {
  :root {
    --color-ink:          hsl(220 15% 92%);
    --color-ink-muted:    hsl(220 10% 62%);
    --color-ink-faint:    hsl(220 8% 42%);
    --color-ink-hairline: hsl(220 8% 22%);
    --color-surface:      hsl(220 16% 10%);
    --color-surface-alt:  hsl(220 14% 14%);
    --color-accent:       hsl(220 80% 68%);
    --color-accent-muted: hsl(220 50% 20%);
  }
}


/* ─── 1. Box Model ───────────────────────────────────────────────────────── */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Prevent size inflation */
* {
  min-width: 0;
}


/* ─── 2. Document & Body ─────────────────────────────────────────────────── */

html {
  /* Prevent font inflation on mobile */
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;

  /* Smooth scrolling — respects reduced motion below */
  scroll-behavior: smooth;

  /* Improve text rendering */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;

  /* Tab size for code blocks */
  tab-size: 2;
  -moz-tab-size: 2;
}

body {
  font-family:
    "Iowan Old Style",
    "Palatino Linotype",
    "URW Palladio L",
    P052,
    Georgia,
    serif;
  font-size: var(--text-base);
  font-weight: 400;
  line-height: var(--leading-normal);
  color: var(--color-ink);
  background-color: var(--color-surface);

  /* Hyphenation for justified / narrow columns */
  word-break: break-word;
  overflow-wrap: break-word;
}

/* Respect motion preferences */
@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;
  }
}


/* ─── 3. Typography ──────────────────────────────────────────────────────── */

/* Sensible typographic inheritance for form fields */
input,
button,
textarea,
select {
  font: inherit;
}

/* Balance headings */
h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
}

/* Prevent orphaned words */
p {
  text-wrap: pretty;
}


/* ─── 4. Headings ────────────────────────────────────────────────────────── */

h1, h2, h3, h4, h5, h6 {
  font-weight: 400;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl);  }
h5 { font-size: var(--text-lg);  }
h6 { font-size: var(--text-md);  }

/* Kicker / eyebrow label before a heading */
h1 + [data-kicker],
h2 + [data-kicker],
h3 + [data-kicker] {
  margin-top: 0;
}

[data-kicker] {
  display: block;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-2);
}


/* ─── 5. Body Copy ───────────────────────────────────────────────────────── */

p {
  max-width: var(--measure);
  line-height: var(--leading-normal);
}

p + p {
  margin-top: var(--space-4);
}

/* Dropcap utility */
p[data-dropcap]::first-letter {
  float: left;
  font-size: calc(var(--text-base) * 3.4);
  line-height: 0.8;
  padding-right: var(--space-2);
  padding-top: var(--space-1);
  font-weight: 400;
}

strong, b {
  font-weight: 600;
}

em, i {
  font-style: italic;
}

small {
  font-size: var(--text-sm);
}

mark {
  background-color: hsl(50 100% 80%);
  color: inherit;
  padding: 0 var(--space-1);
  border-radius: var(--radius-sm);
}

sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub { bottom: -0.25em; }
sup { top:    -0.5em;  }

abbr[title] {
  text-decoration: underline dotted;
  cursor: help;
}

/* Lining figures for tabular data */
[data-figures="tabular"] {
  font-variant-numeric: tabular-nums;
}

/* Oldstyle figures for body copy */
[data-figures="oldstyle"] {
  font-variant-numeric: oldstyle-nums;
}


/* ─── 6. Lists ───────────────────────────────────────────────────────────── */

ul, ol {
  padding-left: var(--space-6);
  max-width: var(--measure);
}

ul { list-style-type: disc; }
ol { list-style-type: decimal; }

li {
  margin-top: var(--space-2);
  line-height: var(--leading-normal);
}

li::marker {
  color: var(--color-ink-muted);
}

/* Nested lists */
li > ul,
li > ol {
  margin-top: var(--space-2);
}

/* Unstyled list reset */
[role="list"],
[data-list="bare"] {
  list-style: none;
  padding: 0;
}

/* Definition lists */
dl {
  max-width: var(--measure);
}

dt {
  font-weight: 600;
  margin-top: var(--space-4);
}

dd {
  padding-left: var(--space-6);
  color: var(--color-ink-muted);
}


/* ─── 7. Links ───────────────────────────────────────────────────────────── */

a {
  color: var(--color-accent);
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  text-decoration-skip-ink: auto;
  transition: color var(--duration-fast) ease,
              text-decoration-color var(--duration-fast) ease;
}

a:hover {
  text-decoration-thickness: 2px;
}

a:visited {
  color: var(--color-ink-muted);
}

a:focus-visible {
  outline: none;
  border-radius: var(--radius-sm);
  box-shadow: var(--focus-ring);
}

/* External links */
a[target="_blank"]::after {
  content: " ↗";
  font-size: 0.75em;
  vertical-align: super;
  opacity: 0.5;
}

a[target="_blank"][data-no-external]::after {
  content: none;
}


/* ─── 8. Media ───────────────────────────────────────────────────────────── */

img,
video,
svg,
canvas,
picture {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Preserve aspect ratio for replaced elements */
img,
video {
  object-fit: cover;
}

/* Remove alt text styling */
img[alt] {
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* Figure + caption */
figure {
  margin: 0;
}

figcaption {
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
  color: var(--color-ink-muted);
  margin-top: var(--space-3);
  max-width: var(--measure-narrow);
}

/* SVG icon sizing */
svg[aria-hidden="true"] {
  pointer-events: none;
  fill: currentColor;
}


/* ─── 9. Tables ──────────────────────────────────────────────────────────── */

table {
  border-collapse: collapse;
  border-spacing: 0;
  width: 100%;
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
}

caption {
  text-align: left;
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-3);
}

thead {
  border-bottom: var(--border-medium);
}

th {
  text-align: left;
  font-weight: 600;
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-ink-muted);
  padding: var(--space-3) var(--space-4);
}

td {
  padding: var(--space-3) var(--space-4);
  vertical-align: top;
  border-bottom: var(--border-hairline);
}

tbody tr:last-child td {
  border-bottom: none;
}

/* Zebra striping */
tbody tr:nth-child(even) {
  background-color: var(--color-surface-alt);
}

/* Numeric column alignment */
td[data-type="number"],
th[data-type="number"] {
  text-align: right;
  font-variant-numeric: tabular-nums;
}


/* ─── 10. Forms & Interactive ────────────────────────────────────────────── */

/* Base field */
input,
textarea,
select {
  appearance: none;
  -webkit-appearance: none;
  background-color: var(--color-surface);
  color: var(--color-ink);
  border: var(--border-thin);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  width: 100%;
  transition: border-color var(--duration-fast) ease,
              box-shadow   var(--duration-fast) ease;
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: var(--focus-ring);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-ink-faint);
}

input[disabled],
textarea[disabled],
select[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
}

/* Textarea — no horizontal resize */
textarea {
  resize: vertical;
  min-height: 7em;
}

/* Select arrow */
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23888' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-8);
  cursor: pointer;
}

/* Labels */
label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink-muted);
  margin-bottom: var(--space-1);
}

/* Buttons */
button,
[role="button"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  font: inherit;
  text-align: center;
  white-space: nowrap;
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-4);
  transition: background-color var(--duration-fast) ease,
              box-shadow       var(--duration-fast) ease,
              color            var(--duration-fast) ease;
}

button:focus-visible,
[role="button"]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

button:disabled,
[role="button"][aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* Checkbox & radio */
input[type="checkbox"],
input[type="radio"] {
  width: 1em;
  height: 1em;
  padding: 0;
  flex-shrink: 0;
  cursor: pointer;
  accent-color: var(--color-accent);
}

/* Range */
input[type="range"] {
  padding: 0;
  border: none;
  cursor: pointer;
  accent-color: var(--color-accent);
}

/* Number — remove spin buttons */
input[type="number"] {
  -moz-appearance: textfield;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  appearance: none;
}

/* Search — remove clear button */
input[type="search"]::-webkit-search-decoration,
input[type="search"]::-webkit-search-cancel-button {
  appearance: none;
}


/* ─── 11. Sectioning ─────────────────────────────────────────────────────── */

main {
  display: block; /* IE11 */
}

article,
aside,
footer,
header,
nav,
section {
  display: block;
}

address {
  font-style: normal;
}

/* Skip link — visible on focus */
[data-skip-link] {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  color: var(--color-accent);
  border: var(--border-thin);
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  z-index: 9999;
  transform: translateY(-200%);
  transition: transform var(--duration-fast) ease;
}

[data-skip-link]:focus-visible {
  transform: translateY(0);
}


/* ─── 12. Code & Pre ─────────────────────────────────────────────────────── */

code,
kbd,
samp {
  font-family:
    "JetBrains Mono",
    "Fira Code",
    "Cascadia Code",
    ui-monospace,
    "SF Mono",
    "Consolas",
    monospace;
  font-size: 0.875em;
  font-variant-ligatures: none;
}

code {
  background-color: var(--color-surface-alt);
  color: var(--color-ink);
  padding: 0.1em 0.35em;
  border-radius: var(--radius-sm);
  border: var(--border-hairline);
}

pre {
  overflow-x: auto;
  background-color: var(--color-surface-alt);
  border: var(--border-hairline);
  border-radius: var(--radius);
  padding: var(--space-6);
  line-height: var(--leading-snug);
  font-size: var(--text-sm);
  tab-size: 2;
  -moz-tab-size: 2;
}

/* Reset code inside pre */
pre > code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  border-radius: 0;
}

kbd {
  background-color: var(--color-surface-alt);
  border: var(--border-thin);
  border-bottom-width: 2px;
  border-radius: var(--radius-sm);
  padding: 0.1em 0.4em;
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
}


/* ─── 13. Horizontal Rule ────────────────────────────────────────────────── */

hr {
  border: none;
  border-top: var(--border-hairline);
  margin: var(--space-8) 0;
}

/* Ornament variant */
hr[data-ornament] {
  border: none;
  text-align: center;
  overflow: visible;
  color: var(--color-ink-faint);
}

hr[data-ornament]::after {
  content: "* * *";
  display: inline-block;
  position: relative;
  top: -0.65em;
  padding: 0 var(--space-4);
  background: var(--color-surface);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-widest);
}

/* Section divider with label */
hr[data-label]::before {
  content: attr(data-label);
}


/* ─── 14. Utilities ──────────────────────────────────────────────────────── */

/* Visually hidden but accessible */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Measure utilities */
.measure         { max-width: var(--measure); }
.measure-narrow  { max-width: var(--measure-narrow); }
.measure-wide    { max-width: var(--measure-wide); }
.measure-none    { max-width: none; }

/* Balance & pretty text */
.balance { text-wrap: balance; }
.pretty  { text-wrap: pretty; }

/* Muted text */
.muted  { color: var(--color-ink-muted); }
.faint  { color: var(--color-ink-faint); }

/* Small caps for proper nouns / labels */
.smallcaps {
  font-variant-caps: small-caps;
  letter-spacing: var(--tracking-wide);
}

/* Lede / standfirst */
.lede {
  font-size: var(--text-md);
  line-height: var(--leading-snug);
  color: var(--color-ink-muted);
  max-width: var(--measure);
}

/* Capo — large decorative opener */
.capo {
  font-size: var(--text-5xl);
  line-height: 1;
  letter-spacing: var(--tracking-tight);
}

/* Pull quote */
.pullquote {
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  font-style: italic;
  color: var(--color-ink);
  border-left: 3px solid var(--color-ink);
  padding-left: var(--space-6);
  margin: var(--space-8) 0;
  max-width: var(--measure-narrow);
}


/* ─── 15. Print ──────────────────────────────────────────────────────────── */

@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a,
  a:visited {
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 80%;
  }

  abbr[title]::after {
    content: " (" attr(title) ")";
  }

  pre {
    white-space: pre-wrap;
  }

  blockquote,
  pre {
    border: 1px solid #999;
    page-break-inside: avoid;
  }

  h2,
  h3,
  p {
    orphans: 3;
    widows: 3;
  }

  h2,
  h3 {
    page-break-after: avoid;
  }

  img {
    page-break-inside: avoid;
  }
}