/* Base + primitives: reset, type, buttons, chips, echo titles, scene scaffold. */
*, *::before, *::after { box-sizing: border-box; }
/* `hidden` must always win over component display rules (grid/flex panels, modals). */
[hidden] { display: none !important; }

html { background: var(--ink); scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100%;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.is-locked { overflow: hidden; }
img, video, canvas { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
a { color: inherit; }
::selection { background: var(--jade); color: var(--ink); }

:focus-visible { outline: 2px solid var(--jade); outline-offset: 3px; border-radius: 4px; }

h1, h2, h3, h4 { margin: 0; font-family: var(--font-display); text-wrap: balance; line-height: 1.05; }
p { margin: 0; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* ── Labels ─────────────────────────────── */
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-family: var(--font-mono); font-size: var(--step--1);
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--jade);
}
.eyebrow::before {
  content: ''; width: 8px; height: 8px; border-radius: 50%;
  background: var(--jade); box-shadow: 0 0 12px var(--jade);
  animation: blink 1.6s steps(2, jump-none) infinite;
}
.lead { color: var(--muted); font-size: var(--step-1); max-width: 58ch; line-height: 1.5; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ── Echo titles (Davi's signature stacked, fading type) ── */
.echo {
  position: relative; display: block;
  font-family: var(--font-display); font-weight: 800; text-transform: uppercase;
  letter-spacing: -0.01em; line-height: 0.9;
}
.echo__line { display: block; will-change: transform; }
.echo__line + .echo__line { margin-top: -0.14em; }
.echo__line[aria-hidden] {
  background: linear-gradient(180deg, var(--muted), transparent 92%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.echo__line:nth-child(2) { opacity: 0.62; }
.echo__line:nth-child(3) { opacity: 0.34; }
.echo__line:nth-child(4) { opacity: 0.16; }
.echo--title { font-size: var(--step-4); }

/* ── Buttons ─────────────────────────────── */
.btn {
  --btn-bg: var(--felt-2); --btn-fg: var(--text); --btn-line: var(--line);
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  min-height: 44px; padding: 0 var(--s-5);
  border: 1px solid var(--btn-line); border-radius: var(--r-pill);
  background: var(--btn-bg); color: var(--btn-fg);
  font-family: var(--font-display); font-weight: 700; font-size: var(--step--1);
  letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none;
  cursor: pointer; isolation: isolate; overflow: hidden;
  transition: transform var(--t-fast) var(--ease-out), border-color var(--t-med), background var(--t-med), box-shadow var(--t-med);
}
.btn::after { /* shine sweep */
  content: ''; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(110deg, transparent 30%, rgb(255 255 255 / 0.18) 50%, transparent 70%);
  transform: translateX(-120%); transition: transform 700ms var(--ease-out);
}
.btn:hover::after { transform: translateX(120%); }
.btn:hover { border-color: var(--jade); }
.btn:active { transform: scale(0.96); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.btn--jade { --btn-bg: var(--jade); --btn-fg: #04140b; --btn-line: var(--jade); box-shadow: 0 0 0 0 var(--jade-glow); }
.btn--jade:hover { box-shadow: 0 0 32px var(--jade-glow); }
.btn--gold { --btn-bg: var(--gold); --btn-fg: #1a1203; --btn-line: var(--gold); }
.btn--gold:hover { box-shadow: 0 0 32px var(--gold-glow); border-color: var(--gold); }
.btn--ghost { --btn-bg: transparent; }
.btn--icon { width: 44px; padding: 0; }
.btn--pulse { animation: pulse-ring 1.8s var(--ease-out) infinite; }

/* ── Chips ─────────────────────────────── */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 11px; border-radius: var(--r-1);
  border: 1px solid rgb(61 220 132 / 0.3); background: rgb(61 220 132 / 0.08);
  color: #c9f5dc; font-size: var(--step--1); line-height: 1.3;
}
.chip--gold { border-color: rgb(242 193 78 / 0.35); background: rgb(242 193 78 / 0.08); color: #f8e2ad; }
.chip--sky { border-color: rgb(96 165 250 / 0.35); background: rgb(96 165 250 / 0.08); color: #cfe2fd; }
.chip--ember { border-color: rgb(255 93 93 / 0.35); background: rgb(255 93 93 / 0.08); color: #ffd0d0; }
.chips { display: flex; flex-wrap: wrap; gap: var(--s-2); }

/* ── Surfaces ─────────────────────────────── */
.panel {
  background: linear-gradient(180deg, rgb(255 255 255 / 0.025), transparent 40%), var(--felt);
  border: 1px solid var(--line); border-radius: var(--r-3); box-shadow: var(--shadow-1);
}

/* ── Scene scaffold ─────────────────────────────── */
.scene {
  position: relative; z-index: var(--z-content);
  padding-inline: var(--gutter);
  padding-block: calc(var(--hud-h) + var(--s-7)) var(--s-6);
  scroll-margin-top: 0;
}
.scene__inner { max-width: var(--max); margin-inline: auto; display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--s-7); }
.scene__head { display: grid; gap: var(--s-4); justify-items: start; }
.scene__next { display: flex; justify-content: center; padding-top: var(--s-2); }
.next-btn {
  display: inline-flex; align-items: center; gap: var(--s-3);
  background: none; border: 0; cursor: pointer; color: var(--muted);
  font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: 0.12em; text-transform: uppercase;
  padding: var(--s-3) var(--s-4); border-radius: var(--r-pill);
  transition: color var(--t-med);
}
.next-btn:hover { color: var(--text); }
.next-btn__arrow {
  display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--line); animation: bob 1.8s var(--ease-in-out) infinite;
}
.next-btn:hover .next-btn__arrow { border-color: var(--jade); color: var(--jade); }

/* Reveal: elements always visible at rest; motion only adds a lift. */
.reveal { transition: transform 900ms var(--ease-out), opacity 900ms var(--ease-out); }
.js .reveal:not(.is-in) { transform: translateY(24px); opacity: 0.001; }
.js.no-io .reveal { transform: none; opacity: 1; }

/* ── Keyframes ─────────────────────────────── */
@keyframes blink { 50% { opacity: 0.25; } }
@keyframes bob { 50% { transform: translateY(4px); } }
@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 var(--jade-glow); }
  70% { box-shadow: 0 0 0 18px rgb(61 220 132 / 0); }
  100% { box-shadow: 0 0 0 0 rgb(61 220 132 / 0); }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes wiggle {
  0%, 100% { transform: rotate(0); }
  20% { transform: rotate(-9deg); }
  40% { transform: rotate(7deg); }
  60% { transform: rotate(-4deg); }
  80% { transform: rotate(2deg); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; }
  .js .reveal:not(.is-in) { transform: none; opacity: 1; }
}