:root {
  --obsidian: #0E0F0E;
  --ink: #141614;
  --jade: #2F6B57;
  --jade-hi: #3E8A70;
  --gold: #B89A5E;
  --bone: #ECE6DA;
  --bone-2: rgba(236, 230, 218, 0.62);
  --bone-3: rgba(236, 230, 218, 0.38);
  --line: rgba(236, 230, 218, 0.08);
  --spring: cubic-bezier(0.32, 0.72, 0, 1);
  --sans: 'Geist', system-ui, sans-serif;
  --mono: 'Geist Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--obsidian);
  color: var(--bone);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.mono { font-family: var(--mono); }
.small { font-size: 0.8rem; color: var(--bone-3); }

.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 30; opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Nav: floating pill */
.nav-wrap { position: fixed; top: 20px; left: 0; right: 0; z-index: 20; display: flex; justify-content: center; padding: 0 16px; }
.nav {
  display: flex; align-items: center; gap: 36px;
  padding: 10px 12px 10px 18px; border-radius: 999px;
  background: rgba(20, 22, 20, 0.6); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--line);
}
.nav-brand { display: flex; align-items: center; gap: 10px; font-size: 0.82rem; letter-spacing: 0.42em; font-weight: 400; }
.nav-links { display: flex; gap: 26px; font-size: 0.85rem; color: var(--bone-2); }
.nav-links a { transition: color 0.5s var(--spring); }
.nav-links a:hover { color: var(--bone); }
.burger { display: none; width: 36px; height: 36px; border-radius: 999px; border: 0; background: rgba(236,230,218,0.06); position: relative; cursor: pointer; }
.burger span { position: absolute; left: 11px; right: 11px; height: 1px; background: var(--bone); transition: transform 0.6s var(--spring); }
.burger span:first-child { top: 15px; }
.burger span:last-child { top: 21px; }
.menu-open .burger span:first-child { transform: translateY(3px) rotate(45deg); }
.menu-open .burger span:last-child { transform: translateY(-3px) rotate(-45deg); }

.menu {
  position: fixed; inset: 0; z-index: 15; display: flex; flex-direction: column; justify-content: center; gap: 22px; padding: 0 32px;
  background: rgba(14, 15, 14, 0.9); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  opacity: 0; pointer-events: none; transition: opacity 0.6s var(--spring);
}
.menu a { font-size: 2.4rem; font-weight: 300; transform: translateY(40px); opacity: 0; transition: transform 0.8s var(--spring), opacity 0.8s var(--spring); }
.menu-open .menu { opacity: 1; pointer-events: auto; }
.menu-open .menu a { transform: none; opacity: 1; }
.menu-open .menu a:nth-child(2) { transition-delay: 0.05s; }
.menu-open .menu a:nth-child(3) { transition-delay: 0.1s; }
.menu-open .menu a:nth-child(4) { transition-delay: 0.15s; }
.menu-open .menu a:nth-child(5) { transition-delay: 0.2s; }

/* Buttons: pill with nested icon */
.btn {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 8px 8px 8px 24px; border-radius: 999px;
  background: var(--jade); color: var(--bone); font-size: 0.95rem; font-weight: 400;
  transition: transform 0.6s var(--spring), background 0.6s var(--spring);
}
.btn:hover { background: var(--jade-hi); }
.btn:active { transform: scale(0.98); }
.btn-ico {
  width: 34px; height: 34px; border-radius: 999px; display: grid; place-items: center;
  background: rgba(14, 15, 14, 0.25); font-size: 0.9rem;
  transition: transform 0.6s var(--spring);
}
.btn:hover .btn-ico { transform: translate(2px, -1px) scale(1.06); }
.btn-sm { padding: 6px 6px 6px 18px; font-size: 0.88rem; }
.btn-sm .btn-ico { width: 30px; height: 30px; }

.eyebrow {
  display: inline-block; padding: 5px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: rgba(236,230,218,0.03);
  font-size: 0.66rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--bone-2);
  margin-bottom: 26px;
}

/* Hero */
.hero {
  min-height: min(100dvh, 960px); max-width: 1240px; margin: 0 auto; padding: 140px 32px 80px;
  display: grid; grid-template-columns: 1.1fr 0.9fr; align-items: center; gap: 48px;
}
.hero h1 { font-size: clamp(3.6rem, 9vw, 7.6rem); line-height: 0.95; font-weight: 300; letter-spacing: -0.035em; }
.hero h1 em { font-style: normal; color: var(--jade-hi); }
.lede { margin: 32px 0 40px; max-width: 30rem; color: var(--bone-2); font-size: 1.08rem; }
.hero-mark { position: relative; }
.hero-mark img { width: 100%; max-width: 520px; margin-left: auto; opacity: 0.92; }
.hero-mark::before {
  content: ""; position: absolute; inset: 12%; border-radius: 50%;
  background: radial-gradient(circle, rgba(47,107,87,0.28), transparent 68%);
  filter: blur(30px); z-index: -1;
}

/* Sections */
.section { max-width: 1240px; margin: 0 auto; padding: 120px 32px; }
.section-head { max-width: 40rem; margin-bottom: 56px; }
.section h2 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); font-weight: 300; letter-spacing: -0.03em; line-height: 1.05; }
.section-head p { margin-top: 18px; color: var(--bone-2); }

/* Bento of stacks, double-bezel cards */
.bento { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  padding: 6px; border-radius: 30px;
  background: rgba(236, 230, 218, 0.025); border: 1px solid var(--line);
}
.card-lg { grid-column: span 2; }
.card-xl { grid-column: span 3; }
.card-xl h3 { font-size: 3.4rem; }
.card-core {
  height: 100%; border-radius: 24px; padding: 30px; display: flex; flex-direction: column;
  background: linear-gradient(160deg, #181b18, #121412);
  box-shadow: inset 0 1px 1px rgba(236, 230, 218, 0.06);
  transition: transform 0.7s var(--spring);
}
.card:hover .card-core { transform: translateY(-3px); }
.card-top { display: flex; justify-content: space-between; align-items: center; }
.tag { font-size: 0.68rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--gold); }
.num { font-family: var(--mono); font-size: 0.75rem; color: var(--bone-3); }
.card h3 { font-size: 2.6rem; font-weight: 300; letter-spacing: -0.03em; margin: 34px 0 16px; }
.card-lg h3 { font-size: 3.4rem; }
.contents { list-style: none; color: var(--bone-2); font-size: 0.95rem; flex: 1; }
.contents li { padding: 8px 0; border-top: 1px solid var(--line); }
.card-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 30px; }
.price { font-size: 1.5rem; font-weight: 400; letter-spacing: -0.01em; }

/* Steps */
.steps { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.steps li { padding: 34px 30px; border-radius: 28px; border: 1px solid var(--line); background: rgba(236,230,218,0.02); }
.step-n { font-family: var(--mono); font-size: 0.78rem; color: var(--jade-hi); }
.steps h3 { font-size: 1.5rem; font-weight: 400; margin: 22px 0 10px; letter-spacing: -0.015em; }
.steps p { color: var(--bone-2); font-size: 0.95rem; }

/* Purity */
.purity { padding: 6px; border-radius: 34px; border: 1px solid var(--line); background: rgba(236,230,218,0.025); }
.purity-core {
  border-radius: 28px; padding: 64px; background: radial-gradient(120% 140% at 100% 0%, rgba(47,107,87,0.22), transparent 55%), #121412;
  box-shadow: inset 0 1px 1px rgba(236, 230, 218, 0.06);
}
.purity-core p { max-width: 38rem; margin-top: 20px; color: var(--bone-2); }
.coa { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 46px; border-top: 1px solid var(--line); }
.coa div { padding: 22px 0 0; display: flex; flex-direction: column; gap: 6px; }
.coa-k { font-size: 0.75rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--bone-3); }
.coa-v { font-size: 2rem; font-weight: 300; letter-spacing: -0.02em; }
.coa-v.mono { font-size: 1.1rem; padding-top: 10px; }

/* FAQ */
.faq { max-width: 52rem; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; padding: 26px 0; font-size: 1.15rem; display: flex; justify-content: space-between; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--jade-hi); transition: transform 0.6s var(--spring); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq p { padding: 0 0 26px; color: var(--bone-2); max-width: 44rem; }

/* Footer */
.footer { max-width: 1240px; margin: 0 auto; padding: 80px 32px 60px; border-top: 1px solid var(--line); display: grid; gap: 14px; }
.footer-brand { display: flex; align-items: center; gap: 14px; letter-spacing: 0.42em; font-size: 0.9rem; }
.footer a { color: var(--bone-2); }

/* Protocol builder */
.builder { padding: 6px; border-radius: 34px; border: 1px solid var(--line); background: rgba(236,230,218,0.025); }
.builder-core {
  border-radius: 28px; padding: 56px; display: grid; gap: 44px;
  background: radial-gradient(110% 120% at 0% 0%, rgba(47,107,87,0.16), transparent 55%), #121412;
  box-shadow: inset 0 1px 1px rgba(236, 230, 218, 0.06);
}
.q h3 { font-size: 1.5rem; font-weight: 400; letter-spacing: -0.015em; margin: 14px 0 4px; }
.q-sub { color: var(--bone-3); font-size: 0.9rem; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.chip {
  font: inherit; font-size: 0.92rem; color: var(--bone-2); cursor: pointer;
  padding: 10px 18px; border-radius: 999px; border: 1px solid var(--line); background: rgba(236,230,218,0.03);
  transition: background 0.5s var(--spring), color 0.5s var(--spring), border-color 0.5s var(--spring), transform 0.5s var(--spring);
}
.chip:hover { color: var(--bone); border-color: rgba(236,230,218,0.2); }
.chip:active { transform: scale(0.97); }
.chip[aria-pressed="true"] { background: var(--jade); border-color: var(--jade); color: var(--bone); }
.result { border-top: 1px solid var(--line); padding-top: 36px; }
.result .hint { color: var(--bone-3); }
.result.on > * { animation: rise 0.9s var(--spring) both; }
@keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
.pick-top { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; }
.pick-top h3 { font-size: clamp(2.2rem, 4vw, 3.2rem); font-weight: 300; letter-spacing: -0.03em; line-height: 1; }
.pick-top .eyebrow { margin-bottom: 18px; }
.pick-why { color: var(--bone-2); margin-top: 14px; max-width: 34rem; }
.pick-total { display: flex; flex-direction: column; gap: 6px; text-align: right; }
.over { font-size: 0.8rem; color: var(--gold); }
.pick-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin-top: 30px; }
.pick-stack { border-radius: 22px; padding: 24px; border: 1px solid var(--line); background: rgba(236,230,218,0.02); display: flex; flex-direction: column; }
.pick-stack h4 { font-size: 1.9rem; font-weight: 300; letter-spacing: -0.02em; margin: 18px 0 10px; }
.pick-stack .contents { margin-bottom: 22px; font-size: 0.9rem; }
.pick-stack .btn { align-self: flex-start; }
.pick-head { display: flex; justify-content: space-between; align-items: center; }
.price-sm { font-size: 1.05rem; }
.pick-alt { margin-top: 22px; color: var(--bone-3); font-size: 0.92rem; }
.link { font: inherit; color: var(--jade-hi); background: none; border: 0; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.pick-actions { margin-top: 26px; }
.btn-ghost { background: rgba(236,230,218,0.06); border: 1px solid var(--line); }
.btn-ghost:hover { background: rgba(236,230,218,0.1); }

/* Chat */
.chat-fab {
  position: fixed; right: 20px; bottom: 20px; z-index: 25;
  display: flex; align-items: center; gap: 10px; padding: 8px 18px 8px 8px; border-radius: 999px;
  font: inherit; font-size: 0.9rem; color: var(--bone); cursor: pointer;
  background: rgba(20, 22, 20, 0.7); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(236,230,218,0.12);
  transition: transform 0.6s var(--spring), opacity 0.6s var(--spring);
}
.chat-fab:hover { transform: translateY(-2px); }
.chat-open .chat-fab { opacity: 0; pointer-events: none; transform: scale(0.9); }
.chat {
  position: fixed; right: 20px; bottom: 20px; z-index: 26; width: min(380px, calc(100vw - 32px)); height: min(560px, calc(100dvh - 120px));
  padding: 6px; border-radius: 30px; border: 1px solid rgba(236,230,218,0.12);
  background: rgba(20, 22, 20, 0.72); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  opacity: 0; pointer-events: none; transform: translateY(24px) scale(0.97); transform-origin: bottom right;
  transition: opacity 0.6s var(--spring), transform 0.7s var(--spring);
}
.chat-open .chat { opacity: 1; pointer-events: auto; transform: none; }
.chat-core { height: 100%; border-radius: 24px; background: #111311; box-shadow: inset 0 1px 1px rgba(236,230,218,0.06); display: flex; flex-direction: column; overflow: hidden; }
.chat-head { display: flex; align-items: center; gap: 12px; padding: 16px 16px 14px 18px; border-bottom: 1px solid var(--line); }
.chat-head div { display: flex; flex-direction: column; line-height: 1.2; flex: 1; }
.chat-head b { font-weight: 400; letter-spacing: 0.3em; font-size: 0.82rem; }
.chat-head span { font-size: 0.75rem; color: var(--bone-3); margin-top: 4px; }
.chat-x { width: 34px; height: 34px; border-radius: 999px; border: 0; background: rgba(236,230,218,0.06); color: var(--bone); font-size: 1.2rem; cursor: pointer; }
.chat-log { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 10px; }
.msg { max-width: 86%; padding: 11px 15px; border-radius: 18px; font-size: 0.9rem; line-height: 1.5; }
.msg-bot { background: rgba(236,230,218,0.05); border: 1px solid var(--line); border-bottom-left-radius: 6px; color: var(--bone-2); }
.msg-bot b { color: var(--bone); font-weight: 400; }
.msg-bot a { color: var(--jade-hi); }
.msg-me { align-self: flex-end; background: var(--jade); border-bottom-right-radius: 6px; }
.handoff { display: block; margin-top: 8px; font-size: 0.8rem; }
.chat-quick { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.chat-quick button { font: inherit; font-size: 0.8rem; color: var(--bone-2); padding: 7px 12px; border-radius: 999px; border: 1px solid var(--line); background: none; cursor: pointer; transition: color 0.5s var(--spring), border-color 0.5s var(--spring); }
.chat-quick button:hover { color: var(--bone); border-color: rgba(236,230,218,0.24); }
.chat-form { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--line); }
.chat-form input { flex: 1; font: inherit; font-size: 0.92rem; color: var(--bone); background: rgba(236,230,218,0.04); border: 1px solid var(--line); border-radius: 999px; padding: 10px 16px; outline: none; }
.chat-form input:focus { border-color: rgba(62,138,112,0.6); }
.chat-form button { width: 42px; height: 42px; border-radius: 999px; border: 0; background: var(--jade); color: var(--bone); font-size: 1rem; cursor: pointer; }
.typing { display: inline-flex; gap: 4px; }
.typing i { width: 6px; height: 6px; border-radius: 50%; background: var(--bone-3); animation: blink 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: 0.2s; } .typing i:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 80%, 100% { opacity: 0.25; } 40% { opacity: 1; } }

/* Reveal */
.reveal { opacity: 0; transform: translateY(40px); filter: blur(6px); transition: opacity 1s var(--spring), transform 1s var(--spring), filter 1s var(--spring); }
.reveal.in { opacity: 1; transform: none; filter: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
}

/* Mobile */
@media (max-width: 860px) {
  .nav { gap: 14px; }
  .nav-links { display: none; }
  .burger { display: block; }
  .hero { grid-template-columns: 1fr; padding: 120px 16px 64px; min-height: auto; }
  .hero-mark { order: -1; }
  .hero-mark img { max-width: 220px; margin: 0; }
  .section { padding: 80px 16px; }
  .bento, .steps, .coa { grid-template-columns: 1fr; }
  .card-lg, .card-xl { grid-column: span 1; }
  .card-lg h3 { font-size: 2.6rem; }
  .purity-core, .builder-core { padding: 36px 24px; }
  .pick-total { text-align: left; }
  .chat-fab span { display: none; }
  .chat-fab { padding: 8px; }
  .footer { padding: 60px 16px 48px; }
}