/* ---------------------------------------------------------------
   boundlessfaust.me — Adam M. Carlson
   Single-file stylesheet. Editorial-restraint art direction.
   --------------------------------------------------------------- */

:root {
  /* Type */
  --font-serif: "Fraunces", "Iowan Old Style", "Apple Garamond", Georgia,
    "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;

  --text-xs: 0.78rem;   /* 12.5px */
  --text-sm: 0.875rem;  /* 14px   */
  --text-base: 1rem;    /* 16px   */
  --text-lg: 1.125rem;  /* 18px   */
  --text-xl: clamp(1.35rem, 1.1rem + 1vw, 1.65rem);
  --text-2xl: clamp(1.8rem, 1.3rem + 1.8vw, 2.4rem);
  --text-hero: clamp(2.8rem, 1.8rem + 5.5vw, 6.25rem);

  /* Space */
  --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-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Light theme — warm paper with one ochre accent */
  --color-bg: #f5f1ea;          /* warm paper */
  --color-bg-2: #efe9df;        /* slightly deeper paper */
  --color-bg-quiet: #ece5d8;
  --color-ink: #1a1714;         /* near-black ink */
  --color-ink-soft: #4a4540;
  --color-ink-muted: #7a736a;
  --color-rule: #cfc6b5;
  --color-rule-soft: #e2dccd;
  --color-accent: #9a4a1c;      /* burnt sienna / ochre — single accent */
  --color-accent-hover: #7a3a14;

  /* Dark surfaces for the inverted section */
  --color-dark-bg: #14110d;
  --color-dark-bg-2: #1c1814;
  --color-dark-ink: #ebe4d5;
  --color-dark-ink-soft: #b8ad97;
  --color-dark-rule: #2e2820;
  --color-dark-accent: #d6873f;

  --radius: 0;
  --max-w: 1180px;
  --measure: 38rem;

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #14110d;
    --color-bg-2: #1a1612;
    --color-bg-quiet: #19140f;
    --color-ink: #ece5d3;
    --color-ink-soft: #b6ab96;
    --color-ink-muted: #877d6c;
    --color-rule: #2e2820;
    --color-rule-soft: #221d17;
    --color-accent: #d6873f;
    --color-accent-hover: #ecae73;

    --color-dark-bg: #0c0a08;
    --color-dark-bg-2: #14110d;
    --color-dark-ink: #ebe4d5;
    --color-dark-ink-soft: #b8ad97;
    --color-dark-rule: #1f1a14;
    --color-dark-accent: #ecae73;
  }
}

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

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.55;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

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

a {
  color: var(--color-ink);
  text-decoration: none;
  text-decoration-color: var(--color-rule);
  text-underline-offset: 0.18em;
  transition: color 160ms var(--ease), text-decoration-color 160ms var(--ease);
}

a:hover {
  color: var(--color-accent);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  z-index: 100;
}
.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}

.serif {
  font-family: var(--font-serif);
  font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 30, "WONK" 0;
  letter-spacing: -0.012em;
}
.serif.italic {
  font-style: italic;
  font-variation-settings: "opsz" 144, "SOFT" 30, "WONK" 1;
}

.muted { color: var(--color-ink-muted); }
.small { font-size: var(--text-sm); }
.inline-link {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: var(--color-accent);
}
.inline-link:hover {
  text-decoration-color: currentColor;
}

/* --- Layout primitives ----------------------------------------- */

.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-12));
}

/* --- Header ---------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-rule-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-ink);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
}

.mark-svg {
  color: var(--color-ink);
  flex: none;
}

.mark-text {
  display: inline-flex;
  align-items: baseline;
  gap: 0.05em;
}
.mark-text-strong {
  font-weight: 600;
  letter-spacing: 0;
}
.mark-text-weak {
  font-weight: 400;
  color: var(--color-ink-muted);
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-3), 2.5vw, var(--space-8));
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--text-sm);
}

.site-nav a {
  color: var(--color-ink-soft);
  font-weight: 500;
  letter-spacing: 0.01em;
}
.site-nav a:hover { color: var(--color-accent); }

.nav-cta {
  color: var(--color-ink) !important;
}

@media (max-width: 640px) {
  .site-nav ul li:not(:last-child) { display: none; }
}

/* --- Hero ------------------------------------------------------ */

.hero {
  padding-block: clamp(var(--space-16), 12vw, var(--space-32))
    clamp(var(--space-12), 9vw, var(--space-24));
  border-bottom: 1px solid var(--color-rule-soft);
  position: relative;
  overflow: hidden;
}

.hero::before {
  /* faint editorial baseline at the top */
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: var(--color-rule-soft);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(var(--space-6), 3vw, var(--space-10));
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.kicker .dot {
  width: 7px;
  height: 7px;
  background: var(--color-accent);
  display: inline-block;
  border-radius: 50%;
}

.hero-heading {
  font-family: var(--font-serif);
  font-weight: 350;
  font-size: var(--text-hero);
  line-height: 0.95;
  letter-spacing: -0.025em;
  margin: 0;
  max-width: 18ch;
  font-variation-settings: "opsz" 144, "SOFT" 50, "WONK" 0;
}

.hero-heading .italic {
  color: var(--color-accent);
}

.lede {
  max-width: 54ch;
  font-size: var(--text-lg);
  line-height: 1.55;
  color: var(--color-ink-soft);
  margin: 0;
}

.meta-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: var(--space-6) var(--space-8);
  margin: var(--space-6) 0 0;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-rule-soft);
}
.meta-row dt {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}
.meta-row dd {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink);
  font-weight: 500;
}
.meta-row dd a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
}

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

.section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-24));
  border-bottom: 1px solid var(--color-rule-soft);
}

.section-dark {
  background: var(--color-dark-bg);
  color: var(--color-dark-ink);
  border-bottom: 1px solid var(--color-dark-rule);
}
.section-dark a { color: var(--color-dark-ink); }
.section-dark a:hover { color: var(--color-dark-accent); }
.section-dark .label { color: var(--color-dark-ink-soft); }
.section-dark .muted { color: var(--color-dark-ink-soft); }
.section-dark .section-heading .serif.italic { color: var(--color-dark-accent); }
.section-dark .bullet-label { color: var(--color-dark-accent); }
.section-dark .col-label { border-top-color: var(--color-dark-rule); }

.section-quiet {
  background: var(--color-bg-quiet);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}
@media (min-width: 820px) {
  .two-col {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: var(--space-12);
  }
}

.col-label {
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-rule);
}
.col-label .label {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: var(--space-2) 0 0;
  font-weight: 500;
}

.inline-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-rule);
  margin-bottom: var(--space-8);
}
.inline-label .label { margin-top: var(--space-2); }
.inline-label .section-heading.compact { margin: 0; max-width: 22ch; }

.section-heading {
  font-family: var(--font-serif);
  font-weight: 380;
  font-size: var(--text-2xl);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-6);
  max-width: 30ch;
  font-variation-settings: "opsz" 96;
}
.section-heading .serif.italic { color: var(--color-accent); }

.prose {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-4);
}
.section-dark .prose { color: var(--color-dark-ink-soft); }

/* --- Building list -------------------------------------------- */

.bullets {
  list-style: none;
  margin: var(--space-6) 0 var(--space-8);
  padding: 0;
  display: grid;
  gap: var(--space-2);
  max-width: var(--measure);
}
.bullets li {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-dark-rule);
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-dark-ink-soft);
}
.bullets li:last-child {
  border-bottom: 1px solid var(--color-dark-rule);
}
@media (min-width: 600px) {
  .bullets li {
    grid-template-columns: 9.5rem 1fr;
    gap: var(--space-6);
    align-items: baseline;
  }
}
.bullet-label {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-dark-accent);
  font-weight: 500;
}

/* --- Stack cards --------------------------------------------- */

.stack-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--color-rule);
  border-bottom: 1px solid var(--color-rule);
}
@media (min-width: 720px) {
  .stack-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (min-width: 1024px) {
  .stack-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stack-card {
  padding: var(--space-8) var(--space-6) var(--space-8) 0;
  border-bottom: 1px solid var(--color-rule-soft);
}
.stack-card:last-child { border-bottom: none; }

@media (min-width: 720px) {
  .stack-card {
    padding: var(--space-8);
    border-right: 1px solid var(--color-rule-soft);
    border-bottom: 1px solid var(--color-rule-soft);
  }
  .stack-card:nth-child(2n) { border-right: none; }
  .stack-card:nth-last-child(-n+2) { border-bottom: none; }
}
@media (min-width: 1024px) {
  .stack-card {
    padding: var(--space-8) var(--space-6);
    border-bottom: none;
    border-right: 1px solid var(--color-rule-soft);
  }
  .stack-card:nth-child(2n) { border-right: 1px solid var(--color-rule-soft); }
  .stack-card:last-child { border-right: none; }
  .stack-card:first-child { padding-left: 0; }
  .stack-card:last-child { padding-right: 0; }
}

.card-title {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0 0 var(--space-3);
  color: var(--color-ink);
}
.card-title::before {
  content: "→ ";
  color: var(--color-accent);
  font-weight: 500;
}
.stack-card .prose {
  font-size: var(--text-sm);
  line-height: 1.6;
  margin: 0;
}

/* --- Aside list ---------------------------------------------- */

.aside-list {
  list-style: none;
  margin: var(--space-2) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  max-width: 44rem;
}
.aside-list li {
  display: grid;
  grid-template-columns: minmax(8rem, 12rem) 1fr;
  gap: var(--space-6);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-rule-soft);
  align-items: baseline;
}
.aside-list li:last-child { border-bottom: 1px solid var(--color-rule-soft); }
.aside-term {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-ink);
  font-variation-settings: "opsz" 96, "WONK" 1;
}
.aside-def {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* --- CTA ----------------------------------------------------- */

.section-cta {
  background: var(--color-bg-2);
  text-align: center;
  border-bottom: none;
}
.cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}
.cta-heading {
  font-family: var(--font-serif);
  font-weight: 360;
  font-size: var(--text-2xl);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0;
  max-width: 18ch;
  font-variation-settings: "opsz" 144, "SOFT" 50;
}
.cta-heading .italic { color: var(--color-accent); }
.cta-sub {
  max-width: 32ch;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  margin: 0;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-ink);
  color: var(--color-bg);
  padding: 0.95rem 1.4rem;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid var(--color-ink);
  transition: background 160ms var(--ease), color 160ms var(--ease),
    transform 160ms var(--ease);
}
.cta-button:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
  transform: translateY(-1px);
}
.cta-button svg { transition: transform 200ms var(--ease); }
.cta-button:hover svg { transform: translate(2px, -2px); }

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

.site-footer {
  padding-block: var(--space-12);
  background: var(--color-bg);
  border-top: 1px solid var(--color-rule-soft);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.foot-mark {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin: 0;
  color: var(--color-ink-soft);
  letter-spacing: 0.04em;
}
.foot-mark svg { color: var(--color-ink-soft); }
.foot-meta { margin: 0; letter-spacing: 0.02em; }
.foot-meta a {
  color: var(--color-ink-soft);
  text-decoration: underline;
  text-decoration-color: var(--color-rule);
}
.foot-meta a:hover { color: var(--color-accent); }