/* ============================================================
   NoAdsDude landing page styles
   See ../.impeccable.md and docs/plans/...-design.md for context.
   ============================================================ */

@font-face {
  font-family: 'Spectral';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('/fonts/spectral-500-latin.woff2') format('woff2');
}

@font-face {
  font-family: 'Atkinson Hyperlegible';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/fonts/atkinson-hyperlegible-400-latin.woff2') format('woff2');
}

@font-face {
  font-family: 'Atkinson Hyperlegible';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('/fonts/atkinson-hyperlegible-700-latin.woff2') format('woff2');
}

:root {
  /* Type families */
  --font-display: 'Spectral', Georgia, 'Times New Roman', serif;
  --font-body: 'Atkinson Hyperlegible', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;

  /* Spacing (4pt scale) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Layout */
  --content-max: 36rem;
  --gutter: clamp(1rem, 5vw, 2rem);

  /* Colors (light theme defaults — overridden in :root[data-theme="dark"] and @media dark) */
  --paper:  oklch(0.97 0.005 80);
  --ink:    oklch(0.22 0.015 40);
  --rule:   oklch(0.85 0.008 60);
  --muted:  oklch(0.45 0.012 50);
  --accent: oklch(0.48 0.14 30);

  color-scheme: light dark;
}

/* Dark theme — applies when JS has set data-theme, OR when system says dark and no override */
:root[data-theme="dark"] {
  --paper:  oklch(0.16 0.012 40);
  --ink:    oklch(0.92 0.008 80);
  --rule:   oklch(0.30 0.012 50);
  --muted:  oklch(0.65 0.012 60);
  --accent: oklch(0.68 0.13 35);
}

/* CSS-only fallback for users with JS disabled: respect prefers-color-scheme */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --paper:  oklch(0.16 0.012 40);
    --ink:    oklch(0.92 0.008 80);
    --rule:   oklch(0.30 0.012 50);
    --muted:  oklch(0.65 0.012 60);
    --accent: oklch(0.68 0.13 35);
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;       /* 17px */
  line-height: 1.6;
  font-feature-settings: 'kern' 1, 'liga' 1, 'calt' 1;
  min-height: 100dvh;
}

/* Light text in dark theme needs slightly more leading */
:root[data-theme="dark"] body { line-height: 1.65; }

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

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0;
}
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Display typography */
h1, h2 {
  font-family: var(--font-display);
  font-weight: 500;
  margin: 0;
}
h1 { font-size: clamp(2.25rem, 1rem + 4.5vw, 4.5rem); line-height: 1.05; letter-spacing: -0.01em; }

/* Section labels (small caps via letter-spacing + uppercase — Spectral's smcp is optional polish) */
.section-label {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 var(--space-6);
}

/* Body paragraphs cap at ~65ch */
p { max-width: 62ch; margin: 0 0 var(--space-4); }

/* Vertical-flow layout. Centered column with side gutters. */
main, .site-header, .site-footer {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

main { display: flex; flex-direction: column; gap: var(--space-16); padding-block: var(--space-16) var(--space-24); }
@media (min-width: 720px) {
  main { gap: var(--space-24); padding-block: var(--space-24) var(--space-24); }
}

main > section { padding-top: var(--space-12); border-top: 1px solid var(--rule); }
main > section:first-child { padding-top: 0; border-top: 0; }   /* manifesto */

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: var(--space-4) 0;
  padding-top: clamp(var(--space-4), 3vh, var(--space-8));
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 1rem + 1vw, 1.75rem);
  letter-spacing: -0.005em;
  color: var(--ink);
  text-decoration: none;
}
.wordmark .mark { color: var(--accent); }

#theme-toggle {
  font-size: 1.125rem;
  width: 2rem; height: 2rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
}
#theme-toggle:hover, #theme-toggle:focus-visible { color: var(--ink); }

/* Icon visibility per theme. Set in JS by toggling data-theme on <html>. */
#theme-toggle [data-icon-light] { display: none; }
#theme-toggle [data-icon-dark]  { display: inline; }
:root[data-theme="dark"] #theme-toggle [data-icon-light] { display: inline; }
:root[data-theme="dark"] #theme-toggle [data-icon-dark]  { display: none; }
/* CSS-only fallback when no data-theme set */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) #theme-toggle [data-icon-light] { display: inline; }
  :root:not([data-theme="light"]):not([data-theme="dark"]) #theme-toggle [data-icon-dark]  { display: none; }
}

.manifesto h1 { margin-bottom: var(--space-8); }
.manifesto p + p { margin-top: var(--space-4); }

.site-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: site;
  display: flex;
  flex-direction: column;
}

.site-list > li {
  counter-increment: site;
  border-bottom: 1px solid var(--rule);
}
.site-list > li:last-child { border-bottom: 0; }

.site-link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "num name arrow"
    ".   desc arrow"
    ".   url  .";
  column-gap: var(--space-4);
  row-gap: var(--space-1);
  align-items: baseline;
  padding-block: var(--space-6);
  color: var(--ink);
  text-decoration: none;
}

.site-link::before {
  content: counter(site, decimal-leading-zero);
  grid-area: num;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding-top: 0.4em;     /* baseline-align with the site name's cap-height */
}

.site-link .site-name {
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 1rem + 2vw, 2.25rem);
  line-height: 1.15;
}
.site-link .site-desc { grid-area: desc; color: var(--ink); }
.site-link .site-url  { grid-area: url;  color: var(--accent); font-size: 0.9375rem; }
.site-link .site-arrow {
  grid-area: arrow;
  align-self: center;
  color: var(--accent);
  font-size: 1.5rem;
  transition: transform 200ms cubic-bezier(0.22, 1, 0.36, 1);
}
.site-link:hover .site-arrow,
.site-link:focus-visible .site-arrow { transform: translateX(4px); }

.site-link:hover .site-name,
.site-link:focus-visible .site-name {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.in-progress {
  margin-top: var(--space-6);
  font-size: 0.9375rem;
  color: var(--muted);
}

.why-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  counter-reset: why;
}
.why-list > li {
  counter-increment: why;
  padding-left: 2.25rem;
  position: relative;
  max-width: 62ch;
}
.why-list > li::before {
  content: counter(why);
  position: absolute;
  left: 0;
  top: 0.05em;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1;
}
.why-list strong { font-weight: 700; }
.why-list strong + span::before { content: ' '; }

.support p { max-width: 62ch; }
.support-cta {
  margin-top: var(--space-6);
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 1rem + 1vw, 1.5rem);
}
.support-cta a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
.caption {
  margin-top: var(--space-4);
  font-size: 0.875rem;
  font-style: italic;
  color: var(--muted);
}

.privacy-panel {
  margin-top: var(--space-12);
  border-top: 1px solid var(--rule);
  padding-top: var(--space-8);
  font-size: 0.9375rem;
  color: var(--muted);
}
.privacy-panel summary {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  list-style: none;
  margin-bottom: var(--space-4);
}
.privacy-panel summary::-webkit-details-marker { display: none; }
.privacy-panel summary::before {
  content: '▸ ';
  display: inline-block;
  margin-right: 0.4em;
  transition: transform 200ms ease-out;
}
.privacy-panel[open] summary::before { transform: rotate(90deg); }
.privacy-panel p { max-width: 62ch; }

.site-footer {
  padding-block: var(--space-12) var(--space-8);
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}
.site-footer .stance { font-style: italic; margin: 0 auto var(--space-2); max-width: none; }
.site-footer .footer-meta { margin: 0; max-width: none; }
.site-footer a { color: var(--muted); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
.site-footer a:hover, .site-footer a:focus-visible { color: var(--accent); }

/* Headline reveal: starts hidden and slid 10px down; .ready on <html> reveals it */
.manifesto h1 {
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity 500ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 500ms cubic-bezier(0.22, 1, 0.36, 1);
}
.ready .manifesto h1 {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion: never animate, always show. */
@media (prefers-reduced-motion: reduce) {
  .manifesto h1 {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .site-link .site-arrow { transition: none; }
  .privacy-panel summary::before { transition: none; }
}

/* Privacy / 404 standalone pages */
main > section > h2.section-label { margin-top: var(--space-8); }
main > section > h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2rem, 1rem + 3vw, 3rem);
  line-height: 1.1;
  margin: 0 0 var(--space-6);
}