/* Concepts 1 & 2 — floating pill nav, centered heroes, shared interior pages */
/* ---------- Buttons ---------- */
.btn-brains {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  border: 0; border-radius: var(--radius-pill);
  background: var(--accent); color: var(--accent-ink);
  font: 600 .95rem/1 var(--font-body);
  padding: .9rem 1.4rem; white-space: nowrap; cursor: pointer; text-decoration: none;
  transition: background-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.btn-brains:hover { background: var(--accent-hover); color: var(--accent-ink); transform: translateY(-1px); }
.btn-brains:active { background: var(--purple); color: #FFFFFF; transform: translateY(0); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: .4rem;
  border: 1px solid var(--border); border-radius: var(--radius-pill);
  background: var(--surface); color: var(--ink);
  font: 500 .9rem/1 var(--font-body); padding: .75rem 1.1rem; text-decoration: none;
  transition: border-color .2s, background-color .2s;
}
.btn-ghost:hover { border-color: var(--node-strong); color: var(--ink); }
.btn-ghost:active { background: var(--purple); border-color: var(--purple); color: #FFFFFF; }

/* ---------- Pill navbar: wide on load, capsule on scroll ---------- */
.nav-shell {
  position: fixed; inset-inline: 0; z-index: 50;
  top: calc(env(safe-area-inset-top, 0px) + 14px);
  display: flex; justify-content: center; padding-inline: 16px; pointer-events: none;
}
.nav-pill {
  pointer-events: auto;
  width: min(1200px, 100%);
  display: flex; align-items: center; gap: 1rem;
  padding: .55rem .6rem .55rem 1.1rem;
  background: color-mix(in srgb, var(--nav-bg) 88%, transparent);
  border: 1px solid var(--nav-border);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  transition: width .6s var(--ease), box-shadow .6s var(--ease), padding .6s var(--ease), background-color .4s;
}
.nav-shell.is-scrolled .nav-pill { width: min(720px, 100%); box-shadow: var(--shadow); padding-block: .45rem; }
.nav-logo { display: flex; align-items: center; flex: 0 0 auto; }
.nav-logo img { height: 30px; width: auto; display: block; }
.nav-links { display: flex; gap: .25rem; margin: 0 auto; padding: 0; list-style: none; }
.nav-links a {
  color: var(--muted); text-decoration: none; font-weight: 500; font-size: .92rem;
  padding: .45rem .8rem; border-radius: var(--radius-pill); transition: color .2s, background-color .2s;
}
.nav-links a:hover { color: var(--ink); background: var(--blush); }
:root[data-theme="dark"] .nav-links a:hover { background: var(--surface-2); }
.nav-links a[aria-current="page"] { color: var(--ink); }
.nav-actions { display: flex; align-items: center; gap: .4rem; flex: 0 0 auto; }
.nav-actions .btn-brains { padding: .65rem 1.05rem; font-size: .88rem; }
.icon-btn {
  width: 40px; height: 40px; display: grid; place-items: center;
  border: 0; border-radius: 50%; background: transparent; color: var(--muted); cursor: pointer;
  transition: background-color .2s, color .2s;
}
.icon-btn:hover { background: var(--blush); color: var(--ink); }
:root[data-theme="dark"] .icon-btn:hover { background: var(--surface-2); }
.icon-btn:active { background: var(--purple); color: #FFFFFF; }
.icon-btn svg { width: 19px; height: 19px; }
.theme-toggle .i-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .i-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .i-moon { display: none; }
.menu-btn { display: none; }
.nav-sheet {
  position: absolute; top: calc(100% + 8px); left: 16px; right: 16px; pointer-events: auto;
  background: var(--surface); border: 1px solid var(--border); border-radius: 22px; box-shadow: var(--shadow);
  padding: .5rem; display: grid;
}
.nav-sheet a { padding: .85rem 1rem; border-radius: 14px; color: var(--ink); text-decoration: none; font-weight: 500; }
.nav-sheet a:hover { background: var(--blush); }
@media (max-width: 720px) {
  .nav-links, .nav-actions .btn-brains { display: none; }
  .menu-btn { display: grid; }
  .nav-actions { margin-left: auto; }
}

/* ---------- Hero shared pieces ---------- */
.hero { position: relative; overflow: hidden; isolation: isolate; }
.hero-bg { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.char {
  position: relative; display: block; margin-inline: auto;
  width: clamp(150px, 20vw, 230px);
}
.char img { width: 100%; height: auto; display: block; position: relative; animation: float 6s ease-in-out infinite; }
.char::before { /* soft blush halo behind the brain */
  content: ""; position: absolute; inset: -30% -40%; z-index: -1; border-radius: 50%;
  background: radial-gradient(closest-side, var(--halo), transparent 70%);
}
.char::after { /* ground shadow */
  content: ""; position: absolute; left: 22%; right: 22%; bottom: -8%; height: 8%;
  border-radius: 50%; background: radial-gradient(closest-side, rgba(31,27,32,.16), transparent);
  animation: shadow 6s ease-in-out infinite;
}
@keyframes float { 0%,100% { transform: translateY(0) rotate(-1deg); } 50% { transform: translateY(-12px) rotate(1deg); } }
@keyframes shadow { 0%,100% { transform: scaleX(1); opacity: 1; } 50% { transform: scaleX(.8); opacity: .6; } }

.brain-tag {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-pill); padding: .4rem .75rem;
}
.brain-tag .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--pepto-deep); box-shadow: 0 0 0 3px var(--blush); animation: blink 2.4s ease-in-out infinite; }
:root[data-theme="dark"] .brain-tag .dot { box-shadow: 0 0 0 3px rgba(245,163,199,.15); }
@keyframes blink { 50% { opacity: .35; } }
.type-caret::after { content: "▍"; margin-left: 1px; color: var(--pepto-deep); animation: blink 1s steps(1) infinite; }

/* Early-access form */
.signup { display: flex; gap: .4rem; padding: .35rem; width: min(440px, 100%);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-pill); box-shadow: var(--shadow); }
.signup input {
  flex: 1 1 auto; min-width: 0; border: 0; background: transparent; color: var(--ink);
  font: 500 .95rem var(--font-body); padding: .6rem .9rem; outline: none;
}
.signup input::placeholder { color: var(--faint); }
.signup:focus-within { border-color: var(--pepto); }
.signup-done { display: none; align-items: center; gap: .5rem; font-weight: 500; color: var(--ink); padding: .85rem 1.2rem;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-pill); }
.signup-done svg { color: var(--accent); }
.signup-wrap.is-done .signup { display: none; }
.signup-wrap.is-done .signup-done { display: inline-flex; }
.teaser-note { font-size: .88rem; color: var(--muted); margin: 0; }
.teaser-note strong { color: var(--ink); font-weight: 600; }


/* ---------- Home: manifesto teaser ---------- */
.teaser-section { padding-block: clamp(4rem, 10vw, 8rem); border-top: 1px solid var(--border); }
.two-tone { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.7rem, 3.6vw, 2.9rem); line-height: 1.18; letter-spacing: -.02em; max-width: 22ch; margin: 1rem 0 2rem; }
.two-tone span { color: var(--faint); }
.serif-tone { font-family: var(--font-serif); font-weight: 400; letter-spacing: -.01em; font-size: clamp(2.1rem, 4.6vw, 3.8rem); line-height: 1.05; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding-block: 2.5rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem 2rem; }
.site-footer img { height: 26px; width: auto; display: block; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: .25rem 1.25rem; }
.site-footer nav a { color: var(--muted); text-decoration: none; font-size: .9rem; }
.site-footer nav a:hover { color: var(--ink); }
.site-footer small { color: var(--faint); }

/* ---------- Interior pages ---------- */
.band { position: relative; overflow: hidden; isolation: isolate; padding-top: calc(env(safe-area-inset-top, 0px) + 150px); padding-bottom: 4.5rem; border-bottom: 1px solid var(--border); }
.band h1 { font-family: var(--font-display); font-weight: 600; font-size: clamp(2.3rem, 6vw, 4.4rem); letter-spacing: -.03em; line-height: 1.02; margin: .8rem 0 1rem; }
.band h1 em { font-family: var(--font-serif); font-style: italic; font-weight: 400; color: var(--accent); letter-spacing: -.01em; }
.band .lede { color: var(--muted); font-size: 1.12rem; max-width: 52ch; margin: 0; }
.band .hero-bg::after { /* fade the motion into the page */
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, var(--page) 15%, transparent 70%), linear-gradient(0deg, var(--page), transparent 40%);
}

.prose { max-width: 66ch; }
.prose p { color: var(--muted); font-size: 1.06rem; }
.prose p strong { color: var(--ink); font-weight: 600; }

/* About */
.profile { display: grid; grid-template-columns: minmax(0, 340px) minmax(0, 1fr); gap: clamp(2rem, 6vw, 5rem); padding-block: 4.5rem; align-items: start; }
.portrait {
  aspect-ratio: 4 / 5; max-width: 100%; border-radius: 28px; overflow: hidden; position: relative;
  background: linear-gradient(160deg, var(--blush), var(--surface)); border: 1px solid var(--border);
  display: grid; place-items: end center;
}
:root[data-theme="dark"] .portrait { background: linear-gradient(160deg, #3A3D43, var(--surface-2)); }
.portrait svg { width: 78%; height: auto; color: var(--node); }
.portrait .mono { position: absolute; top: 1rem; left: 1rem; }
.profile h2 { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.8rem, 3.5vw, 2.6rem); letter-spacing: -.02em; margin: 0 0 .25rem; }
.profile .role { color: var(--accent); font-weight: 600; margin-bottom: 1.75rem; }
.facts { list-style: none; padding: 0; margin: 2rem 0 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 20px; overflow: hidden; }
.facts li { background: var(--surface); padding: 1.1rem 1.2rem; }
.facts .mono { display: block; margin-bottom: .35rem; }
.facts b { font-weight: 600; }
.contact-card { margin-block: 0 5rem; padding: clamp(1.75rem, 4vw, 3rem); border-radius: 28px; background: var(--surface); border: 1px solid var(--border);
  display: flex; flex-wrap: wrap; gap: 1.5rem 3rem; align-items: center; justify-content: space-between; }
.contact-card h2 { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.4rem, 2.6vw, 1.9rem); margin: 0 0 .4rem; letter-spacing: -.02em; }
.contact-card p { color: var(--muted); margin: 0; max-width: 52ch; }
@media (max-width: 820px) { .profile { grid-template-columns: minmax(0, 1fr); } .portrait { max-width: 340px; } }
@media (max-width: 480px) { .facts { grid-template-columns: minmax(0, 1fr); } }

/* Manifesto */
.progress { position: fixed; top: 0; left: 0; height: 3px; width: 100%; transform-origin: 0 50%; transform: scaleX(0); z-index: 60;
  background: linear-gradient(90deg, var(--pepto-light), var(--pepto-deep), var(--accent)); }
.chapter { display: grid; grid-template-columns: minmax(0, 180px) minmax(0, 1fr); gap: 1.5rem clamp(2rem, 6vw, 5rem); padding-block: clamp(3.5rem, 8vw, 6rem); border-bottom: 1px solid var(--border); }
.chapter-num { font-family: var(--font-mono); font-size: .8rem; letter-spacing: .1em; color: var(--faint); position: sticky; top: 110px; align-self: start; }
.chapter-num b { display: block; font-family: var(--font-serif); font-weight: 400; font-size: clamp(3rem, 7vw, 5.5rem); line-height: 1; letter-spacing: 0; color: var(--pepto); margin-bottom: .5rem; }
.chapter h2 { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.8rem, 4vw, 3rem); letter-spacing: -.025em; line-height: 1.08; margin: 0 0 1.75rem; max-width: 18ch; }
.chapter h2 span { color: var(--faint); }
.chapter .prose p { color: var(--ink); opacity: .78; }
.pull { font-family: var(--font-serif); font-size: clamp(1.6rem, 3.2vw, 2.3rem); line-height: 1.15; color: var(--ink); margin: 2rem 0; padding-left: 1.25rem; border-left: 2px solid var(--pepto); max-width: 28ch; }
.finale { text-align: center; padding-block: clamp(5rem, 12vw, 9rem); }
.finale p { font-family: var(--font-serif); font-size: clamp(2.2rem, 6vw, 4.6rem); line-height: 1.02; letter-spacing: -.01em; margin: 0 auto 2.5rem; max-width: 18ch; }
.finale p em { color: var(--accent); }
@media (max-width: 720px) { .chapter { grid-template-columns: minmax(0, 1fr); } .chapter-num { position: static; } }