/* BitcoinCommonwealth — design system: "The Sunrise" (Joe, 2026-10-16).
   Colour bases: the original Bitcoin orange #F7931A + forest green.
   Dark (night forest) by default; the toggle switches to light (paper + ink).
   The home hero is a picture of a dawn sky, so it stays dark in both modes.
   Contrast (WCAG AA or better): text on bg 14:1 dark / 12.7:1 light; muted 7:1+;
   orange as text only on dark (7.1:1); on light, orange text is ember #9C5400 (5.1:1). */

:root {
  color-scheme: dark;
  --bg: #0E2016;           /* night */
  --bg-alt: #12291B;
  --ground: #245534;       /* the fields under the sunrise; same in both modes */
  --card: #1A3B26;
  --card-border: #2A5236;
  --text: #EEF2EC;
  --text-strong: #FFFFFF;
  --text-muted: #B9CBBD;
  --accent: #F7931A;       /* the original Bitcoin orange */
  --accent-text: #F7931A;
  --on-accent: #0E2016;
  --link: #9CC5A1;         /* sage */
  --link-hover: #F7931A;
  --border: #23402D;
  --earth: #9CC5A1;        /* stage labels + section rules */
  --th-bg: #16341F;
  --wrap: 44rem;
  --wrap-wide: 72rem;

  --s1: .25rem; --s2: .5rem; --s3: 1rem; --s4: 1.5rem; --s5: 2.5rem; --s6: 4.5rem;

  --step--1: clamp(.91rem, .87rem + .16vw, .98rem);
  --step-0:  clamp(1.06rem, 1.02rem + .22vw, 1.16rem);
  --step-1:  clamp(1.25rem, 1.18rem + .33vw, 1.4rem);
  --step-2:  clamp(1.6rem, 1.3rem + 1.3vw, 2.4rem);
  --step-3:  clamp(1.9rem, 1.5rem + 1.8vw, 2.8rem);
  --step-hero: clamp(2.3rem, 1.2rem + 4.6vw, 4.6rem);
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #F6F1E6;           /* paper */
  --bg-alt: #EFE8D9;
  --card: #FFFFFF;
  --card-border: #D9D3C4;
  --text: #12301F;         /* ink */
  --text-strong: #0B2014;
  --text-muted: #4E5F53;
  --accent-text: #9C5400;  /* ember */
  --link: #1F4A2C;         /* forest */
  --link-hover: #9C5400;
  --border: #D9D3C4;
  --earth: #1F4A2C;
  --th-bg: #EFE8D9;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: var(--step-0);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--s4); }
.wrap.wide { max-width: var(--wrap-wide); }

a { color: var(--link); text-underline-offset: .18em; }
a:hover { color: var(--link-hover); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.skip { position: absolute; left: -999px; top: var(--s2); z-index: 20; background: var(--accent); color: var(--on-accent); padding: var(--s2) var(--s3); border-radius: 6px; }
.skip:focus { left: var(--s2); }

.wm-btc { color: var(--accent-text); }

/* ---------- buttons ---------- */

.btn { display: inline-flex; align-items: center; min-height: 48px; padding: 0 var(--s4); border-radius: 999px; font-weight: 700; text-decoration: none; }
.btn-orange { background: var(--accent); color: var(--on-accent); }
.btn-orange:hover { color: var(--on-accent); filter: brightness(1.07); }
.btn-glass { background: rgba(255,255,255,.1); color: #fff; border: 1.5px solid rgba(255,255,255,.55); }
.btn-glass:hover { color: #fff; background: rgba(255,255,255,.18); }

/* ---------- header ---------- */

.site-header { background: var(--bg); border-bottom: 1px solid var(--border); }
.header-row {
  display: flex; align-items: center; flex-wrap: wrap; gap: 0 var(--s3);
  max-width: var(--wrap-wide); margin: 0 auto; padding: var(--s2) var(--s4);
}
.wordmark {
  display: inline-flex; align-items: center; gap: .55rem; min-height: 44px; margin-right: auto;
  font-weight: 800; font-size: var(--step-1); letter-spacing: -.01em; color: var(--text-strong); text-decoration: none;
}
.wordmark:hover { color: var(--text-strong); }
.wm-mark { width: 1.75rem; height: 1.75rem; flex: none; color: var(--text-strong); }

.site-nav { display: flex; flex-wrap: wrap; }
.site-nav a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 .6rem;
  color: var(--text-muted); text-decoration: none; font-size: var(--step--1); font-weight: 600;
  box-shadow: inset 0 -2px 0 transparent;
}
.site-nav a:hover { color: var(--text-strong); }
.site-nav a[aria-current="page"] { color: var(--text-strong); box-shadow: inset 0 -2px 0 var(--accent); }

.theme-toggle {
  min-width: 44px; min-height: 44px; display: inline-grid; place-items: center;
  border: 1px solid var(--border); border-radius: 10px; background: transparent; color: var(--text-strong); cursor: pointer;
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-toggle svg { width: 1.15rem; height: 1.15rem; }
.theme-toggle .moon-i { display: none; }
:root[data-theme="light"] .theme-toggle .sun-i { display: none; }
:root[data-theme="light"] .theme-toggle .moon-i { display: block; }

/* home: the header floats over the dawn sky, light text in both modes */
.page-home .site-header {
  position: absolute; inset: 0 0 auto 0; z-index: 5; background: transparent; border-bottom-color: transparent;
  --text-strong: #fff; --text-muted: #DCE6DE; --border: rgba(255,255,255,.35); --accent-text: #F7931A;
}

/* ---------- home: the sunrise ---------- */

.hero { position: relative; min-height: min(100vh, 56rem); display: flex; overflow: hidden; background: #0A1A10; color: #fff; }
.scene { position: absolute; inset: 0; width: 100%; height: 100%; }
.sun { animation: rise 3.2s cubic-bezier(.2,.7,.2,1) both; transform-box: view-box; }
@keyframes rise { from { transform: translateY(70px); opacity: .6; } to { transform: none; opacity: 1; } }
.hero-copy { position: relative; z-index: 1; margin: 0 auto; padding: 7rem var(--s4) 0; text-align: center; max-width: 52rem; }
.hero h1 { font-size: var(--step-hero); line-height: 1.04; letter-spacing: -.025em; margin: 0 0 1.1rem; color: #fff; text-shadow: 0 2px 30px rgba(0,0,0,.35); }
.hero h1 span { display: block; }
.hero h1 .o { color: #F7931A; }
.hero .lede { font-size: 1.2rem; color: #DCE6DE; margin: 0 auto 2rem; max-width: 36rem; }
.hero .wm-btc { color: #F7931A; }
.ctas { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; margin: 0; }

.band { padding: var(--s6) 0; }
.band h2 { margin-top: 0; }
.band-ground { background: var(--ground); padding: var(--s4) 0 var(--s6); }
.band-ground .tenets { grid-template-columns: repeat(3, 1fr); margin: 0; }
.band-end { text-align: center; background: linear-gradient(180deg, var(--bg), var(--bg-alt)); }
.band-end p { color: var(--text-muted); }

.own { display: grid; grid-template-columns: 13rem 1fr; gap: 3rem; align-items: center; }
.own-mark { width: 100%; height: auto; color: var(--text-strong); }
.own .big { font-size: var(--step-1); color: var(--text-strong); line-height: 1.5; }

.stages { display: flex; flex-wrap: wrap; gap: var(--s2); margin: 0; }
.stage { display: inline-block; border: 1.5px solid var(--earth); color: var(--earth); border-radius: 999px; padding: .35rem .95rem; font-size: var(--step--1); font-weight: 600; }
.stage.now { background: var(--accent); border-color: var(--accent); color: var(--on-accent); font-weight: 750; }

/* ---------- content pages ---------- */

main.page { padding-block: var(--s5) var(--s6); }
h1, h2, h3 { color: var(--text-strong); line-height: 1.2; letter-spacing: -.015em; }
h1 { font-size: var(--step-3); margin: 0 0 var(--s3); }
h2 { font-size: var(--step-2); margin: var(--s5) 0 var(--s3); }
h3 { font-size: var(--step-1); margin: var(--s4) 0 var(--s2); }
.lead { font-size: var(--step-1); color: var(--text-muted); line-height: 1.5; margin: 0 0 var(--s4); }
p, ul, ol { margin: 0 0 var(--s3); }
li { margin-bottom: var(--s1); }
strong { color: var(--text-strong); }
em { color: var(--text-muted); }
hr { border: 0; border-top: 2px solid var(--earth); width: 4rem; margin: var(--s5) auto; }
blockquote { margin: 0 0 var(--s3); padding: var(--s2) var(--s4); border-left: 3px solid var(--accent); color: var(--text-muted); }
.table-wrap { overflow-x: auto; margin: 0 0 var(--s4); }
table { border-collapse: collapse; width: 100%; font-size: var(--step--1); }
th, td { text-align: left; vertical-align: top; padding: var(--s2) var(--s3); border-bottom: 1px solid var(--border); }
th { color: var(--text-strong); background: var(--th-bg); }
.tagline { color: var(--text-muted); font-style: italic; font-size: var(--step-1); }
.cta-row { text-align: center; margin: var(--s5) 0 0; }

/* the tenets, as cards */
.tenets { display: grid; gap: var(--s3); margin: 0 0 var(--s4); }
.tenet { background: var(--card); border: 1px solid var(--card-border); border-left: 4px solid var(--accent); border-radius: 14px; padding: var(--s4); }
.tenet > :last-child { margin-bottom: 0; }
.tenet > p:first-of-type > strong:first-child { display: block; font-size: var(--step-1); line-height: 1.3; margin-bottom: var(--s1); }
.tenet ul { padding-left: 1.2em; }
.kicker { display: block; color: var(--accent-text); font-weight: 800; font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; margin-bottom: .45rem; }

/* charter articles: the bold lead sits on its own line */
.articles p > strong:first-child { display: block; }
.articles p { margin-bottom: var(--s4); }
.articles hr + p { font-size: var(--step-1); font-weight: 700; color: var(--text-strong); text-align: center; }

/* FAQ: questions as h3, answers right under */
.page-faq main h3 { margin-top: var(--s5); }
.page-faq main h3 + p { margin-top: 0; }

/* ---------- footer ---------- */

.site-footer { border-top: 1px solid var(--border); padding-block: var(--s4) var(--s5); color: var(--text-muted); font-size: var(--step--1); }
.site-footer p { margin-bottom: var(--s2); }
.site-footer .fine { opacity: .9; }

/* ---------- small screens ---------- */

@media (max-width: 48rem) {
  .site-nav { order: 3; width: 100%; margin: 0 calc(-1 * var(--s2)); }
  .site-nav a { padding: 0 .45rem; }
  .band-ground .tenets, .own { grid-template-columns: 1fr; }
  .own-mark { max-width: 9rem; }
  .hero { flex-direction: column-reverse; min-height: 0; }
  .hero-copy { padding: 8.25rem var(--s3) var(--s3); }   /* clears the two-row phone header */
  .scene { position: relative; display: block; height: 18rem; margin-top: -5rem; }  /* sky tucks under the buttons */
}
@media (max-width: 30rem) {
  .wrap, .header-row { padding-inline: var(--s3); }
  .tenet { padding: var(--s3); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}