/* =========================================================================
   Millstone / 542 St Marks — monochrome editorial
   Palette: pure black & warm off-white. No accents.
   Type: Fraunces (serif display) + Inter (grotesque body)
   ========================================================================= */

:root,
[data-theme='light'] {
  /* Monochrome only */
  --ink: #0d0d0c;
  --ink-2: #2a2a28;
  --ink-3: #57574f;
  --ink-4: #8a8a80;
  --ink-5: #b8b8ad;
  --paper: #f6f4ef;
  --paper-2: #eeeae1;
  --paper-3: #e6e2d7;
  --hairline: #d8d3c6;
  --hairline-strong: #b8b3a6;

  --color-text: var(--ink);
  --color-text-muted: var(--ink-3);
  --color-text-faint: var(--ink-4);
  --color-bg: var(--paper);
  --color-surface: var(--paper);
  --color-surface-2: var(--paper-2);
  --color-border: var(--hairline);
  --color-primary: var(--ink);

  /* Type */
  --font-display: 'Fraunces', 'Iowan Old Style', 'Palatino Linotype', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;

  /* Type scale — editorial, single hero moment */
  --text-xs: clamp(0.75rem, 0.7rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.83rem + 0.2vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem);
  --text-2xl: clamp(2rem, 1.4rem + 2.4vw, 3.25rem);
  --text-3xl: clamp(2.5rem, 1.4rem + 4vw, 4.75rem);
  --text-hero: clamp(3rem, 1rem + 6.5vw, 7rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --gutter: clamp(1.25rem, 4vw, 3rem);

  --radius-sm: 2px;
  --radius-md: 4px;

  --transition-interactive: 220ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

[data-theme='dark'] {
  --ink: #f2efe7;
  --ink-2: #d8d4ca;
  --ink-3: #a19d92;
  --ink-4: #77746a;
  --ink-5: #57544c;
  --paper: #0d0d0c;
  --paper-2: #17171559;
  --paper-3: #1e1d1a;
  --hairline: #2a2925;
  --hairline-strong: #3d3c37;

  --color-text: var(--ink);
  --color-text-muted: var(--ink-3);
  --color-text-faint: var(--ink-4);
  --color-bg: var(--paper);
  --color-surface: var(--paper);
  --color-surface-2: #17161382;
  --color-border: var(--hairline);
  --color-primary: var(--ink);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --ink: #f2efe7;
    --ink-2: #d8d4ca;
    --ink-3: #a19d92;
    --ink-4: #77746a;
    --paper: #0d0d0c;
    --paper-2: #17171582;
    --paper-3: #1e1d1a;
    --hairline: #2a2925;
    --hairline-strong: #3d3c37;
    --color-text: var(--ink);
    --color-text-muted: var(--ink-3);
    --color-text-faint: var(--ink-4);
    --color-bg: var(--paper);
    --color-surface: var(--paper);
    --color-surface-2: #17161382;
    --color-border: var(--hairline);
    --color-primary: var(--ink);
  }
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  font-feature-settings: 'ss01', 'cv11';
}

img,
picture,
video,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  cursor: pointer;
  background: none;
  border: none;
  font: inherit;
  color: inherit;
}
h1,
h2,
h3,
h4 {
  text-wrap: balance;
  line-height: 1.08;
  font-weight: 400;
}
p {
  text-wrap: pretty;
  max-width: 68ch;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}
:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
.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;
}

/* Interactive transitions */
a,
button,
[role='button'] {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    opacity var(--transition-interactive);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* -------- Typography roles -------- */
.display,
.h-display {
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: -0.025em;
  font-variation-settings: 'opsz' 144;
}
.display em,
.h-display em {
  font-style: italic;
  font-weight: 400;
}

.eyebrow {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
  font-weight: 500;
}
.dim {
  color: var(--color-text-muted);
}

/* -------- Header -------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: var(--space-4) var(--gutter);
  background: color-mix(in oklab, var(--paper) 88%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--hairline);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}
.brand-mark {
  width: 26px;
  height: 26px;
  color: var(--ink);
}
.brand-text {
  display: grid;
  line-height: 1.15;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.brand-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--text-sm);
}
.nav a {
  color: var(--color-text-muted);
}
.nav a:hover {
  color: var(--color-text);
}
.nav .nav-cta {
  color: var(--paper);
  background: var(--ink);
  padding: 0.55rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--ink);
}
.nav .nav-cta:hover {
  background: transparent;
  color: var(--ink);
}
[data-theme='dark'] .nav .nav-cta {
  color: var(--paper);
  background: var(--ink);
  border-color: var(--ink);
}
[data-theme='dark'] .nav .nav-cta:hover {
  background: transparent;
  color: var(--ink);
}

@media (max-width: 720px) {
  .nav a:not(.nav-cta) {
    display: none;
  }
  .brand-sub {
    display: none;
  }
}

/* -------- Buttons -------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.5rem;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: 999px;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn-primary:hover {
  background: transparent;
  color: var(--ink);
}
.btn-ghost {
  border-color: var(--hairline-strong);
  color: var(--color-text);
}
.btn-ghost:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn-full {
  width: 100%;
}

/* -------- Hero -------- */
.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-bottom: 1px solid var(--hairline);
}
@media (min-width: 900px) {
  .hero {
    grid-template-columns: 1.05fr 1fr;
    align-items: stretch;
    min-height: calc(100dvh - 4rem);
  }
}
.hero-media {
  position: relative;
  overflow: hidden;
  background: var(--paper-3);
  aspect-ratio: 4 / 5;
}
@media (min-width: 900px) {
  .hero-media {
    aspect-ratio: auto;
    height: 100%;
  }
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  filter: contrast(1.02);
}
.hero-copy {
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1.5rem, 5vw, 4.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-6);
  border-left: 1px solid var(--hairline);
}
@media (max-width: 899px) {
  .hero-copy {
    border-left: none;
    border-top: 1px solid var(--hairline);
  }
}
.display {
  font-size: var(--text-3xl);
  max-width: 14ch;
}
.lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 40ch;
  line-height: 1.55;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

/* -------- Sections shared -------- */
.section {
  padding-block: clamp(3.5rem, 8vw, 7rem);
  padding-inline: var(--gutter);
  border-bottom: 1px solid var(--hairline);
  max-width: var(--content-wide);
  margin: 0 auto;
}
.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-6);
  align-items: baseline;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--hairline);
}
.section-number {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  font-weight: 400;
}
.h-display {
  font-size: var(--text-2xl);
  max-width: 22ch;
}
.section-lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 55ch;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

/* -------- 01 The Tree — index card -------- */
.tree-card {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}
@media (max-width: 780px) {
  .tree-card {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 480px) {
  .tree-card {
    grid-template-columns: 1fr;
  }
}
.tree-card > div {
  background: var(--paper);
  padding: var(--space-6) var(--space-6);
  display: grid;
  gap: var(--space-2);
}
.tree-card dt {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
}
.tree-card dd {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.tree-card dd em {
  font-style: italic;
  color: var(--color-text-muted);
  font-size: 0.9em;
}
.tree-card a {
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}
.tree-card a:hover {
  color: var(--color-text-muted);
}

/* -------- 02 Facts -------- */
.facts {
  list-style: none;
  display: grid;
  gap: 0;
  counter-reset: fact;
}
.facts li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: var(--space-6);
  padding: clamp(1.25rem, 3vw, 2rem) 0;
  border-bottom: 1px solid var(--hairline);
  align-items: baseline;
}
.facts li:last-child {
  border-bottom: none;
}
.fact-num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}
.facts p {
  font-size: var(--text-lg);
  max-width: 60ch;
  line-height: 1.5;
}

/* -------- 03 Project -------- */
.project-grid {
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 880px) {
  .project-grid {
    grid-template-columns: 1fr minmax(320px, 400px);
  }
}
.project-copy p {
  font-size: var(--text-base);
  margin-bottom: var(--space-5);
  line-height: 1.65;
  color: var(--ink-2);
}
.pullquote {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  font-weight: 400;
  color: var(--color-text);
  border-left: 2px solid var(--ink);
  padding-left: var(--space-5);
  margin-top: var(--space-6);
  max-width: 40ch;
}

.fundraise {
  border: 1px solid var(--hairline-strong);
  padding: clamp(1.5rem, 3vw, 2rem);
  background: var(--color-surface-2);
  display: grid;
  gap: var(--space-4);
  position: sticky;
  top: 6rem;
}
.goal {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-family: var(--font-display);
}
.goal-raised {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1;
}
.goal-of {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-family: var(--font-body);
  letter-spacing: 0.02em;
}
.goal-total {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  font-family: var(--font-display);
}

.thermometer {
  height: 6px;
  background: var(--paper-3);
  border: 1px solid var(--hairline);
  overflow: hidden;
}
.thermometer-fill {
  height: 100%;
  background: var(--ink);
  transition: width 800ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.tiers {
  list-style: none;
  display: grid;
  gap: 0;
  margin-top: var(--space-2);
}
.tiers li {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--hairline);
  align-items: baseline;
  font-size: var(--text-sm);
}
.tiers li:last-child {
  border-bottom: 1px solid var(--hairline);
}
.tiers span {
  font-family: var(--font-display);
  font-size: var(--text-base);
  letter-spacing: -0.01em;
}
.tiers em {
  font-style: normal;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.fine-print {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.cost-table {
  margin-top: clamp(3rem, 6vw, 4.5rem);
  padding-top: clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--hairline);
}
.cost-title {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}
.cost-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.cost-table th,
.cost-table td {
  padding: var(--space-4) 0;
  text-align: left;
  border-bottom: 1px solid var(--hairline);
  vertical-align: baseline;
}
.cost-table th {
  font-weight: 500;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.cost-table .num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-display);
  font-size: var(--text-base);
}
.cost-table tr.total td {
  border-bottom: none;
  border-top: 2px solid var(--ink);
  padding-top: var(--space-5);
  font-family: var(--font-display);
  font-size: var(--text-lg);
}
.cost-table tr.total td.num {
  font-size: var(--text-xl);
}

/* -------- 04 Gallery -------- */
.gallery {
  display: block;
}
.gallery-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .gallery-grid {
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: var(--space-6);
  }
}
.gallery-grid img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: var(--paper-3);
  filter: contrast(1.02);
}
.gallery figcaption {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-5);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* -------- 05 Timeline -------- */
.timeline {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
  grid-template-columns: 1fr;
}
@media (min-width: 800px) {
  .timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }
}
.timeline .column {
  padding: 0;
}
@media (min-width: 800px) {
  .timeline .column {
    padding: 0 var(--space-6);
    border-right: 1px solid var(--hairline);
  }
  .timeline .column:first-child {
    padding-left: 0;
  }
  .timeline .column:last-child {
    border-right: none;
    padding-right: 0;
  }
}
.timeline h3 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-weight: 500;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: var(--space-5);
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink);
  display: inline-block;
}
.status-dot.upcoming {
  background: transparent;
  border: 1px solid var(--ink);
}
.status-dot.in-progress {
  background: var(--ink);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--ink) 20%, transparent);
}
.status-dot.done {
  background: var(--ink);
}
.timeline ul {
  list-style: none;
  display: grid;
  gap: 0;
}
.timeline li {
  padding: var(--space-4) 0;
  border-top: 1px solid var(--hairline);
  font-size: var(--text-base);
  line-height: 1.4;
}
.timeline li:last-child {
  border-bottom: 1px solid var(--hairline);
}

/* -------- CTA strip --------
   Always inverted vs page: light page => black strip; dark page => cream strip.
   The variables inside the strip are re-mapped so buttons/text automatically
   pick the right contrast without touching each rule. */
.cta-strip {
  --ink: #f6f4ef;
  --paper: #0d0d0c;
  --color-text: var(--ink);
  --color-text-muted: #a19d92;
  background: var(--paper);
  color: var(--ink);
  border-bottom: 1px solid var(--hairline);
}
[data-theme='dark'] .cta-strip {
  --ink: #0d0d0c;
  --paper: #f6f4ef;
  --color-text: var(--ink);
  --color-text-muted: #57574f;
  background: var(--paper);
  color: var(--ink);
  border-top: 1px solid var(--hairline);
}
.cta-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: clamp(4rem, 10vw, 8rem) var(--gutter);
  display: grid;
  gap: var(--space-6);
  justify-items: start;
}
.cta-inner .eyebrow {
  color: color-mix(in oklab, var(--ink) 65%, transparent);
}
.cta-inner h2 {
  font-size: var(--text-3xl);
  max-width: 16ch;
}
.cta-inner p {
  color: color-mix(in oklab, var(--ink) 80%, transparent);
  font-size: var(--text-lg);
  max-width: 46ch;
}
/* The btn-primary and btn-ghost use var(--ink)/var(--paper) — inside
   .cta-strip those are already flipped, so buttons match automatically. */
.cta-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-2);
}

/* -------- Resources -------- */
.resource-list {
  list-style: none;
  display: grid;
  gap: 0;
}
.resource-list li {
  border-bottom: 1px solid var(--hairline);
}
.resource-list li:last-child {
  border-bottom: none;
}
.resource-list a {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  align-items: baseline;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  letter-spacing: -0.01em;
  position: relative;
}
.resource-list a::after {
  content: '↗';
  font-family: var(--font-body);
  color: var(--color-text-muted);
  position: absolute;
  right: 0;
  transition: transform var(--transition-interactive);
}
.resource-list a:hover::after {
  transform: translate(2px, -2px);
  color: var(--color-text);
}
.resource-list a .dim {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  padding-right: 1.75rem;
}
.resource-list a:hover span:first-child {
  font-style: italic;
}

/* -------- Footer -------- */
.site-footer {
  padding: clamp(3rem, 6vw, 5rem) var(--gutter) var(--space-8);
  max-width: var(--content-wide);
  margin: 0 auto;
}
.foot-grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
  padding-bottom: var(--space-10);
  border-bottom: 1px solid var(--hairline);
}
@media (min-width: 720px) {
  .foot-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.foot-grid p {
  font-size: var(--text-sm);
}
.foot-grid .brand-mark {
  width: 32px;
  height: 32px;
  margin-bottom: var(--space-3);
}
.foot-grid .brand-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  margin-bottom: var(--space-1);
}
.foot-grid a {
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}
.foot-grid a:hover {
  color: var(--color-text-muted);
}
.colophon {
  margin-top: var(--space-8);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
}

/* -------- Theme toggle -------- */
.theme-toggle {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 30;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
}
.theme-toggle:hover {
  background: transparent;
  color: var(--ink);
}

/* -------- Utilities -------- */
@media (max-width: 620px) {
  .fundraise {
    position: static;
  }
  .display {
    max-width: 100%;
  }
}