/* ── Nexium Protocol — cream / ink / ember ─────────────────────────────── */
:root {
  --cream: #FAF8F4;
  --cream-2: #F3F0E9;
  --paper: #FFFFFF;
  --ink: #16130F;
  --ink-2: #3D372F;
  --ink-3: #7A7267;
  --line: #E6E1D7;
  --line-2: #D6CFC1;
  --ember: #C0662B;
  --ember-soft: #F6EADF;
  --danger: #A93B27;
  --ok: #3F7A52;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(22,19,15,.04), 0 8px 24px -12px rgba(22,19,15,.10);
  --shadow-lg: 0 2px 4px rgba(22,19,15,.04), 0 24px 60px -24px rgba(22,19,15,.18);
  --sans: "Instrument Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.wrap { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.mono { font-family: var(--mono); }
.dim { color: var(--ink-3); }
.ital { font-style: italic; color: var(--ink-3); }

/* ── nav ── */
.nav {
  position: sticky; top: 0; z-index: 40;
  background: rgba(250,248,244,.82);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -.01em; white-space: nowrap; }
.brand__mark { width: 30px; height: 30px; flex: none; display: block; }
.brand__dim { color: var(--ink-3); font-weight: 400; }
.nav__links { display: flex; gap: 26px; margin-left: auto; font-size: 14.5px; color: var(--ink-2); }
.nav__links a { position: relative; padding: 4px 0; white-space: nowrap; }
.nav__links a:hover { color: var(--ink); }
.nav__links a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px;
  background: var(--ember); transition: right .25s ease;
}
.nav__links a:hover::after { right: 0; }
.nav__actions { display: flex; align-items: center; gap: 10px; margin-left: 8px; }

/* ── buttons ── */
.btn {
  font-family: var(--sans); font-size: 14.5px; font-weight: 500;
  padding: 9px 16px; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; transition: .18s ease; white-space: nowrap;
}
.btn--primary { background: var(--ink); color: var(--cream); }
.btn--primary:hover { background: #2A241D; transform: translateY(-1px); }
.btn--ghost { background: transparent; border-color: var(--line-2); color: var(--ink); }
.btn--ghost:hover { background: var(--paper); border-color: var(--ink-3); }
.btn--ember { background: var(--ember); color: #fff; }
.btn--ember:hover { background: #A9581F; transform: translateY(-1px); }
.btn--lg { padding: 13px 24px; font-size: 15.5px; }
.btn--sm { padding: 6px 12px; font-size: 13px; }
.btn--block { width: 100%; }
.btn:disabled { opacity: .42; cursor: not-allowed; transform: none; }

.badge {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .03em;
  padding: 5px 10px; border-radius: 999px; border: 1px solid var(--line-2);
  background: var(--paper); color: var(--ink-2); white-space: nowrap;
}
.badge--ok { color: var(--ok); border-color: #C6DDCD; background: #F1F7F2; }
.badge--warn { color: var(--danger); border-color: #E8CFC9; background: #FBF1EF; }

/* ── hero ── */
.hero { position: relative; padding: 108px 0 96px; overflow: hidden; }
.hero__grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
                    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 10%, transparent 70%);
  opacity: .7;
}
.hero__inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 1fr) 340px;
  gap: 48px; align-items: center;
}
.hero__copy { max-width: 640px; }
.hero__coin { margin: 0; justify-self: center; }
.hero__coin img {
  width: 100%; max-width: 340px; height: auto; display: block;
  filter: drop-shadow(0 30px 60px rgba(22, 19, 15, .16));
  animation: coin-in 1s cubic-bezier(.16, 1, .3, 1) both;
}
@keyframes coin-in {
  from { opacity: 0; transform: translateY(18px) scale(.94); }
}
@media (prefers-reduced-motion: reduce) { .hero__coin img { animation: none; } }
.eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ember); margin: 0 0 18px;
}
.eyebrow--light { color: #E0A97A; }
.hero__title {
  font-size: clamp(40px, 5.2vw, 66px); line-height: 1.05; letter-spacing: -.035em;
  font-weight: 600; margin: 0 0 24px;
}
.hero__lede { font-size: clamp(17px, 2vw, 20px); color: var(--ink-2); max-width: 660px; margin: 0 0 34px; }
.hero__cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__motto {
  margin-top: 56px; font-family: var(--mono); font-size: 13px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--ink-3);
  padding-top: 22px; border-top: 1px solid var(--line);
}

/* ── sections ── */
.section { padding: 92px 0; }
/* The nav is sticky, so anchor targets have to stop below it rather than under it. */
.section[id], #top { scroll-margin-top: 84px; }
/* #stats has no top padding of its own — give the jump some air. */
#stats { scroll-margin-top: 108px; }
.section--tight { padding: 0 0 12px; }
.section--alt { background: var(--cream-2); border-block: 1px solid var(--line); }
.section--dark { background: var(--ink); color: var(--cream); padding: 84px 0; }
.section__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; margin-bottom: 28px; }
.h2 { font-size: clamp(28px, 3.6vw, 42px); letter-spacing: -.03em; font-weight: 600; margin: 0 0 20px; line-height: 1.12; }
.h2--light { color: var(--cream); }
.lede { font-size: 17.5px; color: var(--ink-2); max-width: 560px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }

/* ── stat bar ── */
.statbar {
  display: grid; grid-template-columns: repeat(5, 1fr);
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden;
}
.stat { padding: 22px 24px; border-left: 1px solid var(--line); display: flex; flex-direction: column; gap: 4px; }
.stat:first-child { border-left: 0; }
.stat__k { font-size: 12.5px; color: var(--ink-3); letter-spacing: .02em; }
.stat__v { font-family: var(--mono); font-size: 25px; font-weight: 500; letter-spacing: -.02em; }
.stat__s { font-size: 12px; color: var(--ink-3); }

/* ── cards ── */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.cards--3 { grid-template-columns: repeat(3, 1fr); margin-top: 44px; }
.card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; box-shadow: var(--shadow); transition: .2s ease;
}
.cards .card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--line-2); }
.card--pad { padding: 26px; }
.card__n { font-family: var(--mono); font-size: 12px; color: var(--ember); letter-spacing: .08em; }
.card h3 { font-size: 18px; margin: 10px 0 8px; letter-spacing: -.015em; font-weight: 600; }
.card p { margin: 0; font-size: 14.8px; color: var(--ink-2); }

.list { margin: 24px 0 0; padding: 0; list-style: none; display: grid; gap: 14px; }
.list li { position: relative; padding-left: 22px; font-size: 15.5px; color: var(--ink-2); }
.list li::before { content: ""; position: absolute; left: 0; top: 11px; width: 7px; height: 7px; background: var(--ember); border-radius: 2px; }
.list--light li { color: #C8C0B4; }
.list--light li::before { background: var(--ember); }
.list--light code { background: rgba(255,255,255,.08); padding: 1px 6px; border-radius: 4px; font-family: var(--mono); font-size: 13px; }

.formula {
  margin-top: 28px; display: grid; gap: 8px; padding: 20px;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
}
.formula code { font-family: var(--mono); font-size: 13.5px; color: var(--ink-2); }
.formula code.dim { color: var(--ink-3); font-size: 12.5px; }

/* ── simulator ── */
.sim__title { margin: 0; font-size: 18px; font-weight: 600; letter-spacing: -.015em; }
.sim__sub { margin: 4px 0 20px; font-size: 13.5px; color: var(--ink-3); }
.sim__row { margin-bottom: 16px; }
.sim__row label { display: flex; justify-content: space-between; font-size: 13.5px; color: var(--ink-2); margin-bottom: 7px; }
.sim__row output { font-family: var(--mono); color: var(--ink); font-weight: 500; }
.sim__hr { border: 0; border-top: 1px dashed var(--line-2); margin: 20px 0; }
input[type=range] { width: 100%; appearance: none; height: 3px; border-radius: 2px; background: var(--line-2); outline: none; }
input[type=range]::-webkit-slider-thumb {
  appearance: none; width: 16px; height: 16px; border-radius: 50%;
  background: var(--ink); border: 3px solid var(--paper); box-shadow: 0 0 0 1px var(--line-2); cursor: pointer;
}
.sim__out { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
.sim__bar { height: 8px; border-radius: 999px; background: var(--cream-2); overflow: hidden; border: 1px solid var(--line); }
.sim__bar span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--ember), #E09A5C); transition: width .3s ease; }
.sim__nums { display: flex; justify-content: space-between; align-items: baseline; margin-top: 12px; font-size: 13.5px; color: var(--ink-3); }
.sim__nums strong { font-family: var(--mono); font-size: 26px; color: var(--ink); font-weight: 500; }
.sim__note { font-size: 13px; color: var(--ink-3); margin: 10px 0 0; min-height: 34px; }

/* ── active set ── */
.legend { display: flex; gap: 18px; font-size: 13px; color: var(--ink-3); }
.legend span { display: flex; align-items: center; gap: 7px; }
.dot { width: 9px; height: 9px; border-radius: 3px; display: inline-block; }
.dot--free { background: var(--paper); border: 1px solid var(--line-2); }
.dot--held { background: var(--ink-2); }
.dot--immune { background: var(--ember); }
.dot--you { background: var(--ok); }

.setwrap { display: grid; grid-template-columns: 1fr 356px; gap: 24px; align-items: start; }
.slots {
  display: grid; grid-template-columns: repeat(10, 1fr); gap: 8px;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow);
}
.slot {
  aspect-ratio: 1; border-radius: var(--radius-sm); border: 1px solid var(--line);
  background: var(--cream); cursor: pointer; position: relative;
  display: grid; place-items: center; transition: .15s ease;
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
}
.slot:hover { transform: translateY(-2px); border-color: var(--ink-3); z-index: 2; }
.slot--held { background: var(--ink); color: #B8AFA2; border-color: var(--ink); }
.slot--immune { background: var(--ember); color: #FFF0E2; border-color: var(--ember); }
.slot--you { background: var(--ok); color: #EAF3EC; border-color: var(--ok); }
.slot--sel { outline: 2px solid var(--ember); outline-offset: 2px; }
.slot__p { position: absolute; bottom: 3px; right: 5px; font-size: 9px; opacity: .8; }

.inspect { position: sticky; top: 92px; min-height: 260px; }
.inspect__empty { color: var(--ink-3); font-size: 14.5px; margin: 0; }
.kv { display: grid; gap: 10px; margin: 18px 0; }
.kv__row { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; font-size: 14px; }
.kv__k { color: var(--ink-3); }
.kv__v { font-family: var(--mono); text-align: right; word-break: break-all; }
.hr { border: 0; border-top: 1px solid var(--line); margin: 18px 0; }
.oddsbar { height: 6px; border-radius: 999px; background: var(--cream-2); border: 1px solid var(--line); overflow: hidden; margin: 6px 0 14px; }
.oddsbar span { display: block; height: 100%; background: var(--ember); }

/* ── challenge lifecycle ── */
.fight {
  border: 1px solid var(--line-2); border-radius: var(--radius-sm);
  background: var(--cream); padding: 16px; margin-top: 4px;
}
.fight--ready { border-color: var(--ember); background: var(--ember-soft); }
.fight--won { border-color: #C6DDCD; background: #F1F7F2; }
.fight--lost { border-color: #E8CFC9; background: #FBF1EF; }
.fight--dead { opacity: .8; }
.fight__head { display: flex; align-items: center; gap: 8px; font-size: 14.5px; margin-bottom: 12px; }
.fight__dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--ember); flex: none;
  animation: pulse 1.4s ease-in-out infinite;
}
.fight--ready .fight__dot { animation: none; }
@keyframes pulse { 50% { opacity: .25; } }
@media (prefers-reduced-motion: reduce) { .fight__dot { animation: none; } }

.fight__steps { list-style: none; margin: 0 0 12px; padding: 0; display: grid; gap: 7px; counter-reset: step; }
.fight__steps li {
  position: relative; padding-left: 26px; font-size: 13px; color: var(--ink-3); counter-increment: step;
}
.fight__steps li::before {
  content: counter(step); position: absolute; left: 0; top: 1px;
  width: 17px; height: 17px; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--mono); font-size: 10px;
  border: 1px solid var(--line-2); background: var(--paper); color: var(--ink-3);
}
.fight__steps li.is-done { color: var(--ink-2); }
.fight__steps li.is-done::before { content: "✓"; background: var(--ink); border-color: var(--ink); color: var(--cream); }
.fight__steps li.is-now { color: var(--ink); font-weight: 500; }
.fight__steps li.is-now::before { border-color: var(--ember); color: var(--ember); }
.fight__hint { font-size: 12.5px; color: var(--ink-3); margin: 0 0 12px; line-height: 1.5; }
.fight__hint b { color: var(--ink); font-family: var(--mono); }

.rollbar {
  position: relative; height: 10px; border-radius: 999px;
  background: var(--cream-2); border: 1px solid var(--line-2); overflow: hidden; margin-bottom: 5px;
}
.rollbar__win { position: absolute; inset: 0 auto 0 0; background: var(--ember); opacity: .35; }
.rollbar__pin { position: absolute; top: -2px; bottom: -2px; width: 2px; background: var(--ink); }
.rollbar__legend {
  display: flex; justify-content: space-between; font-size: 10.5px;
  color: var(--ink-3); font-family: var(--mono); margin-bottom: 12px;
}

/* ── operator console ── */
.console { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.console__locked { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.console__locked p { margin: 0; color: var(--ink-2); }
.panel { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.panel h3 { margin: 0 0 4px; font-size: 17px; font-weight: 600; letter-spacing: -.015em; }
.panel__sub { margin: 0 0 18px; font-size: 13.5px; color: var(--ink-3); }
.statline { display: flex; align-items: baseline; gap: 10px; margin-bottom: 6px; }
.statline b { font-family: var(--mono); font-size: 30px; font-weight: 500; letter-spacing: -.02em; }
.statline small { color: var(--ink-3); font-size: 13px; }
.meter { height: 5px; background: var(--cream-2); border: 1px solid var(--line); border-radius: 999px; overflow: hidden; margin-bottom: 14px; }
.meter span { display: block; height: 100%; background: var(--ink); }
.meter--ember span { background: var(--ember); }
.rowbtns { display: flex; gap: 8px; flex-wrap: wrap; }
.cost { font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); margin: 10px 0 14px; }
.field { display: flex; gap: 8px; margin-top: 12px; }
.field input {
  flex: 1; font-family: var(--mono); font-size: 14px; padding: 9px 12px;
  border: 1px solid var(--line-2); border-radius: var(--radius-sm); background: var(--cream); color: var(--ink);
}
.field input:focus { outline: 2px solid var(--ember); outline-offset: -1px; border-color: transparent; }
.note { font-size: 12.5px; color: var(--ink-3); margin: 12px 0 0; }

/* ── loop ── */
.loop {
  display: flex; align-items: stretch; gap: 10px; flex-wrap: wrap;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow);
}
.loop__step { flex: 1; min-width: 150px; display: flex; flex-direction: column; gap: 4px; padding: 16px; background: var(--cream); border: 1px solid var(--line); border-radius: var(--radius-sm); }
.loop__step span { font-weight: 600; font-size: 15px; letter-spacing: -.01em; }
.loop__step small { color: var(--ink-3); font-size: 12.5px; }
.loop__step--burn { background: var(--ember-soft); border-color: #EBD5C2; }
.loop__arrow { display: grid; place-items: center; color: var(--line-2); font-size: 18px; }
.loop__arrow--back { color: var(--ember); }

/* ── footer ── */
.footer { border-top: 1px solid var(--line); padding: 44px 0; }
.footer__inner { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; }
.footer__motto { font-family: var(--mono); font-size: 12.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin: 14px 0 0; }
.footer__meta { text-align: right; font-size: 13px; color: var(--ink-3); }
.footer__meta p { margin: 0 0 4px; }
.footer__meta a { border-bottom: 1px solid var(--line-2); transition: .18s ease; }
.footer__meta a:hover { color: var(--ember); border-color: var(--ember); }

/* ── toasts ── */
.toasts { position: fixed; right: 20px; bottom: 20px; z-index: 90; display: grid; gap: 10px; max-width: 360px; }
.toast {
  background: var(--ink); color: var(--cream); padding: 13px 16px; border-radius: var(--radius-sm);
  font-size: 14px; box-shadow: var(--shadow-lg); animation: rise .25s ease;
}
.toast--err { background: var(--danger); }
.toast--ok { background: var(--ok); }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }

/* ── responsive ── */
@media (max-width: 1000px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .hero__coin { order: -1; justify-self: start; }
  .hero__coin img { max-width: 210px; }
  .grid2, .setwrap { grid-template-columns: 1fr; gap: 32px; }
  .cards, .cards--3 { grid-template-columns: repeat(2, 1fr); }
  .statbar { grid-template-columns: repeat(2, 1fr); }
  .stat { border-left: 0; border-top: 1px solid var(--line); }
  .stat:nth-child(-n+2) { border-top: 0; }
  .stat:nth-child(even) { border-left: 1px solid var(--line); }
  .console { grid-template-columns: 1fr; }
  .inspect { position: static; }
  .nav__links { display: none; }
}
@media (max-width: 620px) {
  .wrap { width: calc(100% - 32px); }
  .section__head { align-items: flex-start; }
  .cards, .cards--3 { grid-template-columns: 1fr; }
  .slots { grid-template-columns: repeat(5, 1fr); }
  .hero { padding: 64px 0 56px; }
  .section { padding: 64px 0; }
  .loop__arrow { display: none; }
}