/*
 * Scott Built Systems — site design system
 * Quiet, document-first styles for the portfolio and case files.
 */

/* 1. Design tokens
   -------------------------------------------------------------------------- */

:root {
  --color-bg: #FAFAF8;
  --color-text: #1A1A1A;
  --color-muted: #6B6B68;
  --color-border: #E4E4E0;
  --color-accent: #3A5A78;
  --color-accent-hover: #2E4A63;
  --color-accent-tint: rgb(58 90 120 / 3%);

  --font-display: Georgia, 'Iowan Old Style', 'Source Serif 4', 'Times New Roman', serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', Inter, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  --font-size-display: clamp(2.75rem, 2.25rem + 2.5vw, 4.5rem);
  --font-size-h1: clamp(2.25rem, 1.9rem + 1.5vw, 3.25rem);
  --font-size-h2: clamp(1.625rem, 1.45rem + 0.8vw, 2rem);
  --font-size-h3: clamp(1.25rem, 1.15rem + 0.4vw, 1.5rem);
  --font-size-body: clamp(1rem, 1.0875rem - 0.125vw, 1.0625rem);
  --font-size-small: clamp(0.8125rem, 0.78rem + 0.15vw, 0.875rem);
  --font-size-label: clamp(0.6875rem, 0.65rem + 0.15vw, 0.75rem);

  --space-1: 0.5rem;
  --space-1-5: 0.75rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-6: 3rem;
  --space-8: 4rem;
  --space-12: 6rem;

  --radius: 4px;
  --measure: 68ch;
  --prose-width: 720px;
  --index-width: 1120px;
  --gutter: 20px;
  --transition-quick: 120ms;
}

/* 2. Small normalize and document defaults
   -------------------------------------------------------------------------- */

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

html {
  color-scheme: light;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  min-width: 0;
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  line-height: 1.65;
  overflow-wrap: break-word;
  text-rendering: optimizeLegibility;
}

button,
input,
textarea,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

h1,
h2,
h3,
p,
blockquote,
figure {
  margin-block-start: 0;
}

h1,
h2,
h3 {
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  text-wrap: balance;
}

h1 {
  font-size: var(--font-size-h1);
}

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

h3 {
  font-size: var(--font-size-h3);
}

p,
li {
  max-width: var(--measure);
}

code,
kbd,
samp {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

code {
  overflow-wrap: anywhere;
}

::selection {
  background: var(--color-border);
  color: var(--color-text);
}

/* 3. Shared layout and reading measure
   -------------------------------------------------------------------------- */

.site-shell {
  width: min(100%, calc(var(--index-width) + (2 * var(--gutter))));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose-shell {
  width: min(100%, calc(var(--prose-width) + (2 * var(--gutter))));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.reference-main {
  padding-block: var(--space-8) var(--space-12);
}

.reference-intro {
  max-width: var(--measure);
  margin-block-end: var(--space-12);
}

.reference-intro h1 {
  margin-block-end: var(--space-2);
}

.reference-intro p {
  margin: 0;
  color: var(--color-muted);
}

.component-section {
  padding-block: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.component-section > h2 {
  max-width: var(--prose-width);
  margin-block-end: var(--space-6);
}

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

.component-demo--wide {
  max-width: var(--index-width);
}

/* 4. Accessibility and interaction foundations
   -------------------------------------------------------------------------- */

.skip-link {
  position: fixed;
  z-index: 10;
  inset-block-start: calc(-1 * var(--space-12));
  inset-inline-start: var(--space-2);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius);
  background: var(--color-accent);
  color: var(--color-bg);
  font-size: var(--font-size-small);
  font-weight: 700;
}

.skip-link:focus-visible {
  inset-block-start: var(--space-2);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

:where(a, button, [tabindex]):focus-visible,
.is-focused {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* 5. Type scale
   -------------------------------------------------------------------------- */

.type-specimen {
  display: grid;
  gap: var(--space-6);
}

.type-specimen__item {
  min-width: 0;
}

.type-specimen__label,
.label {
  display: block;
  margin-block-end: var(--space-1);
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: var(--font-size-label);
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.4;
  text-transform: uppercase;
}

.type-display {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--font-size-display);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.02;
  text-wrap: balance;
}

.type-h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--font-size-h1);
  font-weight: 600;
  line-height: 1.08;
}

.type-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--font-size-h2);
  font-weight: 600;
  line-height: 1.12;
}

.type-h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--font-size-h3);
  font-weight: 600;
  line-height: 1.2;
}

.type-body {
  margin: 0;
  font-size: var(--font-size-body);
}

.type-small,
.small {
  margin: 0;
  font-size: var(--font-size-small);
  line-height: 1.55;
}

/* 6. Body copy and links
   -------------------------------------------------------------------------- */

.prose > * + * {
  margin-block-start: var(--space-3);
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote {
  margin-block-end: 0;
}

.prose ul,
.prose ol {
  max-width: var(--measure);
  padding-inline-start: var(--space-3);
}

.prose li + li {
  margin-block-start: var(--space-1);
}

.prose blockquote {
  max-width: var(--measure);
  margin-inline: 0;
  padding-inline-start: var(--space-3);
  border-inline-start: 1px solid var(--color-border);
  color: var(--color-muted);
  font-family: var(--font-display);
  font-size: var(--font-size-h3);
  line-height: 1.45;
}

a:not(.button):not(.index-card):not(.site-name):not(.skip-link) {
  color: var(--color-accent);
  text-decoration-line: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
  transition: color var(--transition-quick) ease;
}

a:not(.button):not(.index-card):not(.site-name):not(.skip-link):hover,
a:not(.button):not(.index-card):not(.site-name):not(.skip-link).is-hovered {
  color: var(--color-accent-hover);
}

.state-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
}

.state-sample {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
}

.state-sample__name {
  color: var(--color-muted);
  font-size: var(--font-size-label);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-transform: uppercase;
}

/* 7. Primary button
   -------------------------------------------------------------------------- */

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: var(--space-1-5) var(--space-3);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  background: var(--color-accent);
  color: var(--color-bg);
  font-size: var(--font-size-small);
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  transition:
    background-color var(--transition-quick) ease,
    border-color var(--transition-quick) ease,
    color var(--transition-quick) ease,
    opacity var(--transition-quick) ease;
}

.button:hover,
.button.is-hovered {
  border-color: var(--color-accent-hover);
  background: var(--color-accent-hover);
}

.button:disabled,
.button[aria-disabled='true'] {
  border-color: var(--color-border);
  background: var(--color-border);
  color: var(--color-muted);
  cursor: not-allowed;
}

/* 8. Site and case file headers
   -------------------------------------------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  min-height: 72px;
  align-items: center;
}

.site-name {
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--font-size-h3);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: color var(--transition-quick) ease;
}

.site-name:hover,
.site-name.is-hovered {
  color: var(--color-accent);
}

.case-file-header {
  max-width: var(--prose-width);
  padding-block: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.case-file-header__title {
  margin-block-end: var(--space-2);
  font-size: var(--font-size-h1);
}

.case-file-header__subtitle {
  margin-block-end: var(--space-2);
  color: var(--color-text);
  font-size: var(--font-size-body);
  font-weight: 600;
}

.case-file-header__meta {
  margin: 0;
  color: var(--color-muted);
  font-size: var(--font-size-small);
  line-height: 1.55;
}

/* 9. Case file body rhythm
   -------------------------------------------------------------------------- */

.case-file-body {
  max-width: var(--prose-width);
}

.case-section {
  padding-block: var(--space-8);
}

.case-section + .case-section {
  border-top: 1px solid var(--color-border);
}

.case-section__number {
  margin-block-end: var(--space-1-5);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--font-size-label);
  letter-spacing: 0.08em;
}

.case-section__title {
  margin-block-end: var(--space-3);
  font-size: var(--font-size-h2);
}

.case-section p:last-child {
  margin-block-end: 0;
}

/* 10. Evidence block
   -------------------------------------------------------------------------- */

.evidence-block {
  max-width: var(--measure);
  margin-block: var(--space-4);
  padding: var(--space-3);
  border-inline-start: 1px solid var(--color-accent);
  border-radius: var(--radius);
  background: var(--color-accent-tint);
}

.evidence-block__label {
  margin-block-end: var(--space-1-5);
}

.evidence-block__summary {
  margin-block-end: var(--space-2);
}

.evidence-block__quote {
  display: block;
  max-width: 100%;
  margin: 0;
  padding-block: var(--space-1);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--font-size-small);
  line-height: 1.65;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  white-space: nowrap;
}

.technical-string {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  white-space: nowrap;
}

/* 11. Field notes
   -------------------------------------------------------------------------- */

.field-notes {
  max-width: var(--measure);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: field-note;
}

.field-notes__item {
  position: relative;
  max-width: none;
  padding-block: var(--space-3);
  padding-inline-start: var(--space-6);
  border-top: 1px solid var(--color-border);
  counter-increment: field-note;
}

.field-notes__item:last-child {
  border-bottom: 1px solid var(--color-border);
}

.field-notes__item::before {
  position: absolute;
  inset-block-start: var(--space-3);
  inset-inline-start: 0;
  color: var(--color-muted);
  content: '0' counter(field-note);
  font-family: var(--font-mono);
  font-size: var(--font-size-small);
}

.field-notes__item p {
  margin: 0;
}

.field-notes__item code {
  color: var(--color-text);
}

/* 12. Tables
   -------------------------------------------------------------------------- */

.table-scroll {
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
}

.data-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: var(--font-size-small);
  font-variant-numeric: tabular-nums;
}

.data-table caption {
  padding-block-end: var(--space-2);
  color: var(--color-muted);
  font-size: var(--font-size-small);
  text-align: left;
}

.data-table th,
.data-table td {
  padding: var(--space-1-5) var(--space-2);
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.data-table th:first-child,
.data-table td:first-child {
  padding-inline-start: 0;
}

.data-table th:last-child,
.data-table td:last-child {
  padding-inline-end: 0;
}

.data-table th {
  color: var(--color-muted);
  font-size: var(--font-size-label);
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.4;
  text-transform: uppercase;
}

.data-table .numeric {
  font-family: var(--font-mono);
  text-align: right;
  white-space: nowrap;
}

/* 13. Index cards
   -------------------------------------------------------------------------- */

.index-list {
  display: grid;
  grid-template-columns: 1fr;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--color-border);
  list-style: none;
}

.index-list li {
  max-width: none;
  border-top: 1px solid var(--color-border);
}

.index-card {
  display: block;
  height: 100%;
  padding-block: var(--space-4);
  color: var(--color-text);
  text-decoration: none;
}

.index-card__title {
  margin-block-end: var(--space-1);
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: var(--font-size-h3);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: underline;
  text-decoration-thickness: 0.07em;
  text-underline-offset: 0.16em;
  transition: color var(--transition-quick) ease;
}

.index-card:hover .index-card__title,
.index-card.is-hovered .index-card__title {
  color: var(--color-accent-hover);
}

.index-card__description {
  margin-block-end: var(--space-2);
}

.index-card__meta {
  margin: 0;
  color: var(--color-muted);
  font-size: var(--font-size-small);
  line-height: 1.5;
}

/* 14. Footer
   -------------------------------------------------------------------------- */

.site-footer {
  margin-block-start: var(--space-12);
  padding-block: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.site-footer__availability {
  margin-block-end: var(--space-1);
}

.site-footer__copyright {
  margin: 0;
  color: var(--color-muted);
  font-size: var(--font-size-small);
}

.component-section .site-footer {
  margin-block-start: 0;
}

/* 15. Responsive layout
   -------------------------------------------------------------------------- */

@media (min-width: 48rem) {
  :root {
    --gutter: 40px;
  }

  .reference-main {
    padding-block-start: var(--space-12);
  }

  .type-specimen {
    grid-template-columns: minmax(8rem, 0.35fr) minmax(0, 1fr);
    gap: var(--space-4) var(--space-6);
    align-items: baseline;
  }

  .type-specimen__item {
    display: contents;
  }

  .type-specimen__label {
    margin: 0;
  }

  .evidence-block {
    padding: var(--space-4);
  }

  .index-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-6);
  }
}

@media (min-width: 68.75rem) {
  :root {
    --gutter: 64px;
  }

  .index-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* 16. Motion preference
   -------------------------------------------------------------------------- */

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

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