/* ============================================================
   webprojects55.co.uk — "Workshop Ledger" design system
   Warm paper, ink type, one burnt-orange accent.
   Spacing rhythm: 4 / 16 / 36 (and their doublings).
   ============================================================ */

:root {
  color-scheme: light;

  /* Color — OKLCH, neutrals tinted toward the paper hue (warm, hue ~78) */
  --paper: oklch(0.975 0.012 78);
  --paper-deep: oklch(0.948 0.015 78);
  --paper-raise: oklch(0.995 0.008 78);
  --ink: oklch(0.24 0.018 70);
  --ink-soft: oklch(0.42 0.018 70);
  --ink-mute: oklch(0.55 0.014 70);
  --line: oklch(0.885 0.016 78);
  --line-strong: oklch(0.82 0.018 78);

  /* Accent — burnt workshop orange. Focus rings, links, brand marks only. */
  --accent: oklch(0.62 0.185 42);
  --accent-text: oklch(0.47 0.15 42);
  --accent-wash: oklch(0.94 0.045 55);

  /* Semantic status colors — pill color carries meaning, pill text names it */
  --live: oklch(0.50 0.125 155);
  --live-wash: oklch(0.94 0.045 155);
  --dormant: oklch(0.48 0.012 70);
  --dormant-wash: oklch(0.93 0.009 78);

  /* Row hover shadow — token so dark mode can swap glow for shade */
  --row-shadow: color-mix(in oklab, var(--ink) 8%, transparent);

  /* Theme switch knobs — static values, they do NOT flip with the theme */
  --knob-sun: oklch(0.995 0.005 78);
  --knob-sun-edge: oklch(0.24 0.018 70);
  --knob-moon: oklch(0.27 0.02 75);
  --knob-cut: var(--accent-wash);

  /* Switch track — light gray in light mode so it stands out on paper */
  --switch-track: oklch(0.905 0.008 78);

  /* Spacing rhythm: 1 unit (4px), 4 units (16px), 9 units (36px) — rem so it scales with the 125% root */
  --s1: 0.25rem;
  --s4: 1rem;
  --s9: 2.25rem;
  --s18: 4.5rem;

  /* Type scale — ratio ~1.35 */
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.1875rem;
  --text-lg: 1.625rem;
  --text-xl: 2.1875rem;
  --text-display: clamp(2.5rem, 6.5vw, 4.25rem);

  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --measure: 65ch;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --radius: 0.5rem;
}

/* ---------- Dark: "Night Workshop" — same warm hue family, lamp-lit ---------- */

:root[data-theme="dark"] {
  color-scheme: dark;

  --paper: oklch(0.18 0.012 75);
  --paper-deep: oklch(0.15 0.012 75);
  --paper-raise: oklch(0.22 0.014 75);
  --ink: oklch(0.92 0.008 85);
  --ink-soft: oklch(0.78 0.01 85);
  --ink-mute: oklch(0.62 0.012 85);
  --line: oklch(0.30 0.014 80);
  --line-strong: oklch(0.36 0.015 80);

  --accent: oklch(0.68 0.17 45);
  --accent-text: oklch(0.75 0.13 50);
  --accent-wash: oklch(0.34 0.06 55);

  --live: oklch(0.78 0.12 155);
  --live-wash: oklch(0.27 0.045 155);
  --dormant: oklch(0.72 0.01 85);
  --dormant-wash: oklch(0.27 0.008 80);

  --row-shadow: color-mix(in oklab, black 45%, transparent);

  --knob-moon: oklch(0.20 0.015 75);
  --knob-cut: var(--accent-wash);
  --switch-track: oklch(0.24 0.014 75);

  /* Light-on-dark compensation: trace letter-spacing, brighter smoothing */
  letter-spacing: 0.005em;
}

/* ---------- Fonts ---------- */

@font-face {
  font-family: "Archivo Black";
  src: url("../fonts/archivo-black-400-latin.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* ---------- Reset & base ---------- */

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

html {
  /* 125% base scale: the whole site renders 25% larger, like a permanent zoom */
  font-size: 125%;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--paper);
  -webkit-font-smoothing: antialiased;
  padding-bottom: env(safe-area-inset-bottom);
}

::selection {
  background-color: var(--accent-wash);
  color: var(--ink);
}

/* Avoid orphan words on final lines; ignored where unsupported */
p {
  text-wrap: pretty;
}

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

/* Uniform focus system: dashed reads as focus, not selection */
:focus-visible {
  outline: 2px dashed var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

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

.skip-link {
  position: absolute;
  inset-block-start: -100%;
  inset-inline-start: var(--s4);
  z-index: 10;
  padding: var(--s1) var(--s4);
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  text-decoration: none;
}

.skip-link:focus-visible {
  inset-block-start: var(--s4);
}

/* ---------- Layout shell ---------- */

.site-header,
main > *,
.site-footer {
  padding-inline: clamp(var(--s4), 5vw, 3rem);
}

.site-header,
.site-footer {
  max-width: 76rem;
  margin-inline: auto;
}

main {
  max-width: 76rem;
  margin-inline: auto;
}

/* ---------- Nav ---------- */

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
  border-block-end: 1px solid var(--line);
}

/* Wordmark: split fractured text (adapted from Mandy Michael's pen pRXQZO),
   single accent colour. Base paints the bottom half, ::after paints the top
   half and slides apart on hover/focus, opening a fracture gap. */
.wordmark {
  position: relative;
  display: inline-block;
  font-family: "Archivo Black", var(--font);
  font-weight: 400;
  font-size: calc(var(--text-md) * 1.35);
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: color-mix(in oklab, var(--accent) 82%, var(--ink));
  text-decoration: none;
  background: linear-gradient(
    to bottom,
    transparent 58%,
    color-mix(in oklab, var(--accent) 82%, var(--ink)) 58%
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.wordmark::after {
  content: attr(data-text);
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 0;
  white-space: nowrap;
  pointer-events: none;
  background: linear-gradient(
    to bottom,
    color-mix(in oklab, var(--accent) 82%, var(--ink)) 58%,
    transparent 58%
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transform: translate(0, 0);
  transition: transform 0.6s var(--ease-out);
}

.wordmark:hover::after,
.wordmark:focus-visible::after {
  transform: translate(-0.1875rem, 0);
}

.nav-links {
  display: flex;
  gap: var(--s9);
  list-style: none;
  padding: 0;
}

.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--s1) 0;
  display: inline-block;
}

.nav-links a:hover {
  color: var(--accent-text);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 4px;
}

/* ---------- Theme switch: sun knob (light) / crescent moon knob (dark) ---------- */

.nav-theme {
  display: flex;
  align-items: center;
  margin-inline-start: var(--s4);
}

.theme-switch {
  position: relative;
  display: inline-block;
  inline-size: 2.75rem;
  block-size: 1.5rem;
  border-radius: 999px;
  background: var(--switch-track);
  border: 1px solid var(--line-strong);
  cursor: pointer;
  transition: background-color 0.25s ease-out, border-color 0.25s ease-out;
}

/* Unchecked: sun — white circle with a dark edge */
.theme-switch::before {
  content: "";
  position: absolute;
  inset-block-start: calc((100% - 1.25rem) / 2);
  inset-inline-start: 0.125rem;
  inline-size: 1.25rem;
  block-size: 1.25rem;
  border-radius: 50%;
  background: var(--knob-sun);
  border: 0.125rem solid var(--knob-sun-edge);
  transition:
    transform 0.25s var(--ease-out),
    background-color 0.25s ease-out,
    border-color 0.25s ease-out,
    box-shadow 0.25s ease-out;
}

/* Checked: track warms up, knob becomes a dark crescent moon */
.theme-toggle:checked + .theme-switch {
  background: var(--accent-wash);
}

.theme-toggle:checked + .theme-switch::before {
  transform: translateX(1.25rem);
  background: var(--knob-moon);
  border-color: var(--knob-moon);
  box-shadow: inset -0.3125rem -0.125rem 0 0 var(--knob-cut);
}

.theme-toggle:focus-visible + .theme-switch {
  outline: 2px dashed var(--accent);
  outline-offset: 2px;
}

/* Smooth token swap when the theme flips */
body,
.site-header,
.site-footer {
  transition: background-color 0.25s ease-out, color 0.25s ease-out;
}

/* ---------- Masthead ---------- */

.masthead {
  padding-block-start: clamp(var(--s18), 10vw, 9rem);
  padding-block-end: var(--s18);
}

.masthead-title {
  font-size: var(--text-display);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-block-end: var(--s9);
  max-width: 18ch;
  text-wrap: balance;
}

.masthead-title span {
  display: block;
}

.masthead-strong {
  font-weight: 700;
  color: var(--ink);
}

.masthead-soft {
  font-weight: 400;
  color: var(--ink-mute);
}

.masthead-sub {
  font-size: var(--text-md);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: var(--measure);
  margin-block-end: var(--s9);
}

.building-line {
  display: flex;
  align-items: baseline;
  gap: var(--s4);
  flex-wrap: wrap;
  font-size: var(--text-sm);
}

.building-label {
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-text);
  align-self: center;
}

/* Loader: bouncing ball over descending bars, says "this is live activity" */
.loader {
  inline-size: 1.25rem;
  block-size: 0.75rem;
  position: relative;
  clip-path: inset(-200% 0);
  --bar: no-repeat linear-gradient(var(--accent-text) 0 0);
  background:
    var(--bar) 0    100% / 0.25rem 0.75rem,
    var(--bar) 50%  100% / 0.25rem 0.5rem,
    var(--bar) 100% 100% / 0.25rem 0.25rem;
}

.loader::before {
  content: "";
  position: absolute;
  inline-size: 0.25rem;
  block-size: 0.25rem;
  border-radius: 50%;
  background: var(--accent-text);
  inset-inline-start: -0.5rem;
  inset-block-start: 0;
  animation:
    loader-travel 4s linear infinite,
    loader-bounce 1s cubic-bezier(0, 200, 0.8, 200) infinite;
}

@keyframes loader-travel {
  0% {
    inset-inline-start: -0.5rem;
    transform: translateY(-0.25rem);
  }
  100% {
    inset-inline-start: calc(100% + 0.25rem);
    transform: translateY(0.5rem);
  }
}

@keyframes loader-bounce {
  100% { inset-block-start: -0.1px; }
}

.building-target {
  color: var(--ink-soft);
  transition: opacity 0.2s ease-out;
}

.building-target.is-swapping {
  opacity: 0;
}

/* ---------- Sections ---------- */

.projects {
  padding-block-end: var(--s18);
}

.blog {
  padding-block-end: var(--s18);
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s4);
  flex-wrap: wrap;
  border-block-start: 1px solid var(--line-strong);
  padding-block-start: var(--s9);
  margin-block-end: var(--s4);
}

.section-head h2 {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-note {
  font-size: var(--text-sm);
  color: var(--ink-mute);
}

.section-note .feed-link {
  color: var(--accent-text);
  font-weight: 500;
  text-decoration: none;
}

.section-note .feed-link:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- Project ledger ---------- */

.ledger {
  list-style: none;
  padding: 0;
  counter-reset: project;
}

.ledger-row {
  counter-increment: project;
  border-block-end: 1px solid var(--line);
}

.ledger-row:first-child {
  border-block-start: 1px solid var(--line);
}

.ledger-link {
  display: grid;
  grid-template-columns: minmax(11rem, max-content) 1fr auto auto;
  grid-template-areas: "name desc pill tags";
  align-items: baseline;
  gap: var(--s4);
  padding: var(--s4) 0.5rem;
  margin-inline: -0.5rem;
  border-radius: 0.375rem;
  color: inherit;
  text-decoration: none;
  transition:
    background-color 0.25s ease-out,
    transform 0.25s ease-out;
}

.ledger-link:hover {
  background-color: var(--paper-raise);
  transform: translateY(-0.125rem);
  box-shadow:
    inset 0 0 0 1px var(--line),
    0 0.125rem 0.375rem var(--row-shadow);
}

.ledger-link:hover .ledger-name {
  color: var(--accent-text);
}

.ledger-name {
  grid-area: name;
  font-weight: 700;
  font-size: var(--text-md);
  letter-spacing: -0.01em;
  white-space: nowrap;
  transition: color 0.25s ease-out;
}

.ledger-name::before {
  content: counter(project, decimal-leading-zero);
  font-weight: 400;
  font-size: var(--text-sm);
  color: var(--ink-mute);
  font-variant-numeric: tabular-nums;
  margin-inline-end: 0.5rem;
}

.ledger-desc {
  grid-area: desc;
  color: var(--ink-soft);
  font-size: var(--text-base);
}

.ledger-tags {
  grid-area: tags;
  font-size: var(--text-sm);
  color: var(--ink-mute);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* Status pills: tinted fill, named meaning */
.pill {
  grid-area: pill;
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1;
  padding: var(--s1) 0.75rem;
  border-radius: 999px;
  white-space: nowrap;
}

.pill-live {
  background: var(--live-wash);
  color: var(--live);
}

.pill-building {
  background: var(--accent-wash);
  color: var(--accent-text);
}

.pill-dormant {
  background: var(--dormant-wash);
  color: var(--dormant);
}

/* ---------- Blog ---------- */

.post-list {
  list-style: none;
  padding: 0;
}

.post-row {
  border-block-end: 1px solid var(--line);
}

.post-row:first-child {
  border-block-start: 1px solid var(--line);
}

.post-link {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "title meta";
  align-items: baseline;
  gap: var(--s4);
  padding: var(--s4) 0.5rem;
  margin-inline: -0.5rem;
  border-radius: 0.375rem;
  text-decoration: none;
  color: inherit;
  transition:
    background-color 0.25s ease-out,
    transform 0.25s ease-out;
}

.post-link:hover {
  background-color: var(--paper-raise);
  transform: translateY(-0.125rem);
  box-shadow:
    inset 0 0 0 1px var(--line),
    0 0.125rem 0.375rem var(--row-shadow);
}

.post-link:hover .post-title {
  color: var(--accent-text);
}

.post-title {
  grid-area: title;
  font-weight: 600;
  font-size: var(--text-md);
  letter-spacing: -0.01em;
  transition: color 0.25s ease-out;
}

.post-meta {
  grid-area: meta;
  font-size: var(--text-sm);
  color: var(--ink-mute);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--paper-deep);
  border-block-start: 1px solid var(--line-strong);
  padding-block-start: var(--s18);
  padding-block-end: var(--s9);
  margin-block-start: var(--s9);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--s9);
  padding-block-end: var(--s18);
}

.footer-title {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-block-end: var(--s4);
}

.footer-links {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--s1);
}

.footer-links a {
  color: var(--accent-text);
  text-decoration: underline;
  text-decoration-color: color-mix(in oklab, var(--accent) 40%, transparent);
  text-underline-offset: 3px;
  font-weight: 500;
}

.footer-links a:hover {
  text-decoration-color: var(--accent);
}

.footer-note {
  font-size: var(--text-base);
  color: var(--ink-soft);
  max-width: 48ch;
}

.colophon {
  font-size: var(--text-sm);
  color: var(--ink-mute);
  border-block-start: 1px solid var(--line);
  padding-block-start: var(--s4);
}

/* ---------- Motion ---------- */

/* Masthead: entrance from distance, staggered beats */
.masthead-title,
.masthead-sub,
.building-line {
  animation: arrive 0.6s var(--ease-out) both;
}

.masthead-title { animation-delay: 0.05s; }
.masthead-sub { animation-delay: 0.18s; }
.building-line { animation-delay: 0.3s; }

@keyframes arrive {
  from {
    opacity: 0;
    transform: translateY(1.5rem);
    filter: blur(0.5rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

/* Rows: staggered lateral-settle reveals, JS enhanced, visible without JS */
html.js .reveal {
  opacity: 0;
  transform: translateY(0.75rem);
  transition:
    opacity 0.4s ease-out,
    transform 0.4s var(--ease-out);
}

html.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

  /* Loader: static bars, no ball */
  .loader::before {
    display: none;
  }

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

  html.js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Responsive: composition changes, not just compression ---------- */

@media (max-width: 1280px) {
  .ledger-name {
    white-space: normal;
  }

  .ledger-link {
    grid-template-columns: 1fr auto auto;
    grid-template-areas:
      "name pill tags"
      "desc desc desc";
  }

  .ledger-desc {
    margin-block-start: var(--s1);
    max-width: var(--measure);
  }
}

@media (max-width: 800px) {
  .site-nav {
    min-height: 3.5rem;
  }

  .wordmark {
    font-size: var(--text-base);
  }

  .nav-links {
    gap: 0.75rem;
    font-size: 0;
  }

  .nav-links a {
    font-size: 0.8125rem;
  }

  .nav-theme {
    margin-inline-start: 0;
  }

  .ledger-link {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "name pill"
      "desc desc";
    padding: var(--s4) 8px;
  }

  .ledger-tags {
    display: none;
  }

  .ledger-desc {
    font-size: var(--text-sm);
  }

  .post-link {
    grid-template-columns: 1fr;
    grid-template-areas:
      "title"
      "meta";
  }

  .post-meta {
    white-space: normal;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--s9);
  }

  /* Form-scale guard: keep any future inputs at 1rem to avoid iOS zoom */
  input,
  select,
  textarea {
    font-size: 1rem;
  }
}

@media (max-width: 500px) {
  /* Mobile keeps the original 100% scale */
  html {
    font-size: 100%;
  }

  .site-header,
  main > *,
  .site-footer {
    padding-inline: 0.75rem;
  }

  .wordmark {
    font-size: 0.9375rem;
    letter-spacing: -0.02em;
  }

  .nav-links {
    gap: 0.5rem;
  }

  .nav-links a {
    font-size: 0.75rem;
    padding: 0.375rem 0;
  }

  /* Shrink the switch slightly so the nav row fits 320px (ROADMAP #25) */
  .theme-switch {
    inline-size: 2.25rem;
  }

  .theme-toggle:checked + .theme-switch::before {
    transform: translateX(0.75rem);
  }
}

@media (min-width: 2000px) {
  body {
    font-size: 1.125rem;
  }
}