/* =========================================================
   Charlottesville Glass — shared styles
   Palette drawn from glass: petrol/glass teal, sea-glass,
   furnace amber, on a faintly glass-tinted paper.
   Type: Fraunces (display) + Instrument Sans (body).
   ========================================================= */

:root {
  /* Color */
  --ink:        #16211f;   /* near-black, cooled-glass green-black */
  --ink-soft:   #3b4b47;   /* muted body ink */
  --petrol:     #0e3e39;   /* primary deep glass */
  --petrol-2:   #17564f;   /* lighter petrol (hover) */
  --seaglass:   #a6c8b8;   /* soft translucent glass */
  --seaglass-2: #c9ded4;   /* pale glass */
  --paper:      #eef1ec;   /* warm-cool off white, faint glass tint */
  --paper-2:    #e6ebe4;   /* slightly deeper paper */
  --amber:      #dd8226;   /* furnace accent (fills, buttons, borders) */
  --amber-ink:  #a85a15;   /* darker ember for text on light (accessible) */
  --amber-glow: #f2a63e;   /* molten highlight (on dark) */
  --line:       #d3dbd3;   /* hairline on paper */

  /* Type */
  --display: "Fraunces", Georgia, "Times New Roman", serif;
  --body: "Instrument Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* Scale */
  --step--1: clamp(0.83rem, 0.8rem + 0.15vw, 0.92rem);
  --step-0:  clamp(1rem, 0.96rem + 0.2vw, 1.12rem);
  --step-1:  clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --step-2:  clamp(1.6rem, 1.4rem + 1vw, 2.2rem);
  --step-3:  clamp(2.1rem, 1.7rem + 2vw, 3.3rem);
  --step-4:  clamp(2.8rem, 2rem + 4vw, 5.4rem);

  /* Space */
  --gutter: clamp(1.15rem, 0.8rem + 2vw, 2.5rem);
  --band: clamp(3.5rem, 2.5rem + 5vw, 7rem);
  --radius: 14px;
  --radius-lg: 22px;
  --maxw: 1160px;
}

/* ---------- reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--body);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, iframe { max-width: 100%; display: block; }
a { color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--petrol);
  margin: 0 0 0.5em;
  font-optical-sizing: auto;
}
p { margin: 0 0 1.1rem; max-width: 68ch; }

::selection { background: var(--amber-glow); color: var(--ink); }

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
  border-radius: 4px;
}

/* skip link */
.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--petrol); color: var(--paper);
  padding: 0.6rem 1rem; z-index: 200; border-radius: 0 0 10px 0;
}
.skip:focus { left: 0; }

/* ---------- layout ---------- */
.wrap { width: min(100% - 2*var(--gutter), var(--maxw)); margin-inline: auto; }
.band { padding-block: var(--band); }
.band--tight { padding-block: clamp(2.2rem, 1.6rem + 3vw, 4rem); }

.eyebrow {
  font-family: var(--body);
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 600;
  color: var(--amber-ink);
  margin: 0 0 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 12px;
  background: var(--seaglass);
  border: 1px solid var(--petrol);
  border-radius: 3px;
  opacity: 0.9;
}

.lead { font-size: var(--step-1); line-height: 1.5; color: var(--ink-soft); }
.measure { max-width: 60ch; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--body); font-weight: 600; font-size: var(--step-0);
  padding: 0.8rem 1.4rem; border-radius: 999px;
  text-decoration: none; cursor: pointer; border: 1.5px solid transparent;
  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--petrol); color: var(--paper); }
.btn--primary:hover { background: var(--petrol-2); }
.btn--amber { background: var(--amber); color: var(--ink); }
.btn--amber:hover { background: var(--amber-glow); }
.btn--ghost { background: transparent; color: var(--petrol); border-color: var(--petrol); }
.btn--ghost:hover { background: var(--petrol); color: var(--paper); }
.btn--on-dark { border-color: rgba(255,255,255,0.5); color: var(--paper); }
.btn--on-dark:hover { background: var(--paper); color: var(--petrol); border-color: var(--paper); }

.btn-row { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.6rem; }

/* text link with underline flourish */
.tlink {
  color: var(--petrol); font-weight: 600; text-decoration: none;
  border-bottom: 2px solid var(--seaglass);
  transition: border-color 0.18s ease, color 0.18s ease;
}
.tlink:hover { color: var(--amber-ink); border-color: var(--amber-ink); }

/* ---------- header (frosted glass) ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--paper) 78%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding-block: 0.85rem;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.6rem;
  text-decoration: none; color: var(--petrol);
  font-family: var(--display); font-size: 1.35rem; letter-spacing: -0.01em;
  line-height: 1;
}
.brand b { font-weight: 600; }
.brand .brand-mark {
  width: 30px; height: 30px; flex: none;
}
.nav-links {
  display: flex; align-items: center; gap: 0.35rem; list-style: none; margin: 0; padding: 0;
}
.nav-links a {
  text-decoration: none; color: var(--ink); font-weight: 500;
  padding: 0.5rem 0.75rem; border-radius: 999px;
  font-size: var(--step-0);
  transition: background 0.15s ease, color 0.15s ease;
}
.nav-links a:hover { background: var(--paper-2); color: var(--petrol); }
.nav-links a[aria-current="page"] { color: var(--petrol); background: var(--seaglass-2); }
.nav-cta { margin-left: 0.4rem; }

.nav-toggle {
  display: none; background: transparent; border: 1.5px solid var(--petrol);
  color: var(--petrol); border-radius: 10px; padding: 0.4rem 0.6rem; cursor: pointer;
  font-family: var(--body); font-weight: 600; align-items: center; gap: 0.4rem;
}
.nav-toggle svg { width: 20px; height: 20px; }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute; inset: 100% 0 auto 0;
    flex-direction: column; align-items: stretch;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 0.6rem var(--gutter) 1.1rem;
    gap: 0.15rem;
    box-shadow: 0 18px 30px -22px rgba(14,62,57,0.5);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.7rem 0.75rem; }
  .nav-cta { margin: 0.5rem 0 0; }
  .nav-cta .btn { width: 100%; justify-content: center; }
}

/* ---------- hero ---------- */
.hero { position: relative; overflow: clip; }
.hero-inner {
  position: relative; z-index: 2;
  padding-block: clamp(3.5rem, 2rem + 8vw, 8rem);
  max-width: 44rem;
}
.hero h1 {
  font-size: var(--step-4);
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 0.4em;
}
.hero h1 em { font-style: italic; color: var(--amber-ink); }
.hero .lead { max-width: 40ch; }

/* layered glass panes — signature element */
.panes {
  position: absolute; inset: 0; z-index: 1; overflow: clip;
  pointer-events: none;
}
.pane {
  position: absolute;
  border-radius: 16px;
  mix-blend-mode: multiply;
  border: 1px solid rgba(255,255,255,0.35);
  box-shadow: inset 2px 2px 0 rgba(255,255,255,0.25);
  will-change: transform;
  animation: drift 18s ease-in-out infinite alternate;
}
.pane.p1 { width: 42vw; height: 30vw; right: -6vw; top: 8%;  background: var(--seaglass);   animation-delay: -2s; }
.pane.p2 { width: 30vw; height: 34vw; right: 12vw; top: -6%; background: var(--seaglass-2); animation-delay: -7s; }
.pane.p3 { width: 26vw; height: 20vw; right: 4vw;  bottom: -4%; background: var(--amber); opacity: 0.7; animation-delay: -11s; }
.pane.p4 { width: 20vw; height: 26vw; right: 26vw; bottom: 6%; background: var(--petrol); opacity: 0.16; animation-delay: -4s; }

@media (max-width: 860px) {
  .pane.p1 { width: 62vw; height: 44vw; }
  .pane.p2 { width: 48vw; height: 52vw; }
  .pane.p3 { width: 46vw; height: 34vw; }
  .pane.p4 { display: none; }
  .hero-inner { padding-block: clamp(2.5rem, 2rem + 6vw, 5rem) 8rem; }
}

@keyframes drift {
  from { transform: translate3d(0,0,0) rotate(0deg); }
  to   { transform: translate3d(-1.4rem,1.1rem,0) rotate(-1.4deg); }
}
@media (prefers-reduced-motion: reduce) {
  .pane { animation: none; }
}

/* page hero (interior pages) — smaller */
.page-hero { position: relative; overflow: clip; border-bottom: 1px solid var(--line); }
.page-hero .wrap { position: relative; z-index: 2; }
.page-hero h1 { font-size: var(--step-3); font-weight: 400; }
.page-hero .lead { max-width: 54ch; }
.page-hero .panes .pane { opacity: 0.5; }
.page-hero .pane.p3 { opacity: 0.45; }

/* ---------- generic sections ---------- */
.section-head { max-width: 60ch; margin-bottom: clamp(1.8rem, 1rem + 2vw, 3rem); }
.section-head h2 { font-size: var(--step-3); font-weight: 400; }

.band--paper2 { background: var(--paper-2); }
.band--petrol {
  background: var(--petrol); color: var(--seaglass-2);
}
.band--petrol h2, .band--petrol h3 { color: var(--paper); }
.band--petrol .eyebrow { color: var(--amber-glow); }
.band--petrol .eyebrow::before { background: var(--seaglass); border-color: var(--seaglass); }
.band--petrol p { color: color-mix(in srgb, var(--seaglass-2) 88%, white); }
.band--petrol .tlink { color: var(--amber-glow); border-color: rgba(242,166,62,0.5); }
.band--petrol .tlink:hover { color: var(--paper); border-color: var(--paper); }

/* ---------- pillar cards ---------- */
.cards {
  display: grid; gap: 1.1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15.5rem), 1fr));
}
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(1.4rem, 1rem + 1.5vw, 2rem);
  position: relative; overflow: clip;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 24px 40px -30px rgba(14,62,57,0.55); border-color: var(--seaglass); }
.card .chip {
  display: block;
  width: 44px; height: 30px; border-radius: 7px;
  border: 1px solid var(--petrol);
  margin-bottom: 1.1rem;
  box-shadow: inset 2px 2px 0 rgba(255,255,255,0.4);
}
.card:nth-child(1) .chip { background: var(--seaglass); }
.card:nth-child(2) .chip { background: var(--amber); }
.card:nth-child(3) .chip { background: var(--seaglass-2); }
.card:nth-child(4) .chip { background: var(--petrol); }
.card h3 { font-size: var(--step-1); }
.card p:last-child { margin-bottom: 0; }
.card .card-num {
  position: absolute; top: 1rem; right: 1.2rem;
  font-family: var(--display); font-size: 1rem; color: var(--seaglass);
}

/* ---------- "why glass" list ---------- */
.reasons { display: grid; gap: 0; margin-top: 1rem; }
.reason {
  display: grid; grid-template-columns: 3.2rem 1fr; gap: 1.2rem;
  padding: 1.5rem 0; border-top: 1px solid var(--line); align-items: start;
}
.reason:last-child { border-bottom: 1px solid var(--line); }
.reason .glyph {
  font-family: var(--display); font-size: 1.6rem; color: var(--amber);
  line-height: 1;
}
.reason h3 { font-size: var(--step-1); margin-bottom: 0.25rem; }
.reason p { margin-bottom: 0; color: var(--ink-soft); }

/* ---------- feature / split ---------- */
.split {
  display: grid; gap: clamp(1.5rem, 1rem + 3vw, 3.5rem);
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 820px) { .split { grid-template-columns: 1.05fr 0.95fr; } .split.flip > :first-child { order: 2; } }

.glass-figure {
  position: relative; aspect-ratio: 5 / 4; border-radius: var(--radius-lg);
  overflow: clip; background: var(--paper-2); border: 1px solid var(--line);
}
.glass-figure .panes { position: absolute; inset: 0; }
.glass-figure .pane { animation-duration: 24s; }
.glass-figure .fig-label {
  position: absolute; left: 1rem; bottom: 1rem; z-index: 3;
  background: color-mix(in srgb, var(--paper) 80%, transparent);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  padding: 0.45rem 0.8rem; border-radius: 999px;
  font-size: var(--step--1); font-weight: 600; color: var(--petrol);
  border: 1px solid var(--line);
}

/* ---------- programs list ---------- */
.offer { display: grid; gap: 1.4rem; }
.offer-item {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: clamp(1.4rem, 1rem + 1.5vw, 2.2rem);
  background: var(--paper);
  display: grid; gap: 1rem;
  grid-template-columns: 1fr;
}
@media (min-width: 760px) { .offer-item { grid-template-columns: 12rem 1fr; gap: 2rem; } }
.offer-item .offer-side { }
.offer-item .offer-tag {
  display: inline-block; font-size: var(--step--1); font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em; color: var(--amber-ink);
  margin-bottom: 0.5rem;
}
.offer-item h3 { font-size: var(--step-2); font-weight: 400; }
.offer-item .who {
  font-size: var(--step--1); color: var(--ink-soft); font-weight: 600;
}
.offer-item ul { margin: 0.4rem 0 0; padding-left: 1.1rem; }
.offer-item li { margin-bottom: 0.35rem; }
.offer-item p:last-child { margin-bottom: 0; }

/* ---------- location / contact card ---------- */
.locard {
  display: grid; gap: 0; grid-template-columns: 1fr;
  border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: clip;
  background: var(--paper);
}
@media (min-width: 820px) { .locard { grid-template-columns: 1fr 1fr; } }
.locard .loc-body { padding: clamp(1.5rem, 1rem + 2vw, 2.6rem); }
.locard .loc-map { min-height: 280px; background: var(--paper-2); position: relative; }
.locard .loc-map iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; filter: saturate(0.9); }
.loc-detail { margin: 0 0 1rem; }
.loc-detail dt { font-weight: 700; color: var(--petrol); font-size: var(--step--1); text-transform: uppercase; letter-spacing: 0.08em; }
.loc-detail dd { margin: 0.1rem 0 0; }

/* ---------- donate / notice ---------- */
.notice {
  border: 1.5px dashed var(--amber);
  background: color-mix(in srgb, var(--amber) 10%, var(--paper));
  border-radius: var(--radius-lg);
  padding: clamp(1.4rem, 1rem + 2vw, 2.4rem);
}
.notice .eyebrow { color: var(--amber-ink); }
.notice h3 { color: var(--petrol); }
.notice p:last-child { margin-bottom: 0; }

/* ways-to-help small grid */
.ways { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); margin-top: 1.2rem; }
.way { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem 1.3rem; background: var(--paper); }
.way h4 { font-family: var(--display); font-size: 1.15rem; color: var(--petrol); margin: 0 0 0.35rem; font-weight: 500; }
.way p { margin: 0; font-size: var(--step--1); color: var(--ink-soft); }

/* value list on about */
.values { display: grid; gap: 1.1rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); }
.value { padding: 1.4rem 0 0; border-top: 2px solid var(--seaglass); }
.value h3 { font-size: var(--step-1); }
.value p { margin: 0; color: var(--ink-soft); }

/* ---------- footer ---------- */
.site-footer {
  background: var(--ink); color: var(--seaglass-2);
  padding-block: clamp(2.5rem, 2rem + 3vw, 4rem) 2rem;
}
.footer-grid {
  display: grid; gap: 2rem;
  grid-template-columns: 1fr; align-items: start;
}
@media (min-width: 720px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.site-footer .brand { color: var(--paper); }
.site-footer h4 {
  font-family: var(--body); text-transform: uppercase; letter-spacing: 0.14em;
  font-size: var(--step--1); color: var(--seaglass); margin: 0 0 0.9rem; font-weight: 700;
}
.site-footer a { color: var(--seaglass-2); text-decoration: none; }
.site-footer a:hover { color: var(--amber-glow); }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.footer-note {
  margin-top: 2.5rem; padding-top: 1.4rem; border-top: 1px solid rgba(166,200,184,0.2);
  display: flex; flex-wrap: wrap; gap: 0.8rem 1.5rem; justify-content: space-between;
  font-size: var(--step--1); color: color-mix(in srgb, var(--seaglass-2) 70%, transparent);
}
.footer-note p { margin: 0; max-width: none; }

/* ---------- reveal on scroll (progressive enhancement) ---------- */
/* Hidden state applies ONLY when JS is present (html.js). Without JS,
   or if the observer never fires, all content stays fully visible. */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* small helpers */
.center { text-align: center; margin-inline: auto; }
.mt-0 { margin-top: 0; }
.stack > * + * { margin-top: 1rem; }