@font-face { font-family: "Instrument Serif"; src: url("../vendor/fonts/InstrumentSerif-Regular.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "IBM Plex Sans Condensed"; src: url("../vendor/fonts/IBMPlexSansCondensed-Regular.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "IBM Plex Sans Condensed"; src: url("../vendor/fonts/IBMPlexSansCondensed-Medium.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("../vendor/fonts/IBMPlexMono-Regular.woff2") format("woff2"); font-weight: 400; font-display: swap; }

:root {
  --paper: #f1ebdd;
  --paper-deep: #e8e0cd;
  --ink: #1d1b18;
  --ink-soft: rgba(29, 27, 24, 0.66);
  --ink-faint: rgba(29, 27, 24, 0.18);
  --accent: #9a3b22;
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "IBM Plex Sans Condensed", "Arial Narrow", Arial, sans-serif;
  --mono: "IBM Plex Mono", Consolas, monospace;
  --gutter: clamp(16px, 3vw, 36px);
}

* { box-sizing: border-box; }
html { background: var(--paper); }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); -webkit-font-smoothing: antialiased; }

#scene { position: fixed; inset: 0; width: 100vw; height: 100vh; display: block; z-index: 0; }
#journey { position: relative; z-index: 1; pointer-events: none; }

.brand, .phases, .caption, .controls, .scroll-hint { position: fixed; z-index: 2; }

.eyebrow { margin: 0; font: 400 11px/1.3 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-soft); }

.brand { top: var(--gutter); left: var(--gutter); }
.brand-name { margin: 6px 0 0; font: 400 clamp(26px, 3vw, 38px)/1 var(--serif); }
.brand-sub { margin: 6px 0 0; font: 400 13px/1.4 var(--sans); color: var(--ink-soft); }

.phases { top: 50%; right: var(--gutter); transform: translateY(-50%); }
.phases ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.phases button {
  display: flex; align-items: baseline; gap: 10px; width: 100%; padding: 6px 4px 6px 12px;
  background: none; border: 0; border-left: 1px solid var(--ink-faint); color: var(--ink-soft);
  font: 400 12px/1.2 var(--sans); letter-spacing: 0.08em; text-transform: uppercase; cursor: pointer; text-align: left;
  transition: color .2s, border-color .2s;
}
.phases .num { font-family: var(--mono); font-size: 10px; }
.phases button:hover { color: var(--ink); }
.phases button.is-active { color: var(--ink); border-left: 2px solid var(--accent); padding-left: 11px; }
.phases button:focus-visible, .controls button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.caption {
  left: var(--gutter); bottom: var(--gutter); max-width: min(440px, calc(100vw - 2 * var(--gutter)));
  padding: 16px 18px 18px; background: rgba(241, 235, 221, 0.86); backdrop-filter: blur(6px);
  border-top: 2px solid var(--ink);
}
.caption-kicker { margin: 0; font: 400 11px/1.3 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }
.caption h1 { margin: 8px 0 6px; font: 400 clamp(24px, 2.6vw, 32px)/1.08 var(--serif); }
.caption p:last-child { margin: 0; font: 400 14px/1.5 var(--sans); color: var(--ink-soft); }

.controls { right: var(--gutter); bottom: var(--gutter); display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }
.controls button {
  padding: 7px 12px; background: rgba(241, 235, 221, 0.86); color: var(--ink); border: 1px solid var(--ink-faint);
  font: 400 11px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; cursor: pointer;
}
.controls button[aria-pressed="true"] { border-color: var(--ink); }
#load-status { font: 400 11px/1 var(--mono); color: var(--ink-soft); min-height: 11px; }

.scroll-hint {
  left: 50%; bottom: calc(var(--gutter) + 4px); transform: translateX(-50%);
  font: 400 11px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-soft);
  transition: opacity .4s;
}
.scroll-hint span { display: inline-block; margin-left: 6px; animation: nudge 1.6s ease-in-out infinite; }
.scroll-hint.is-hidden { opacity: 0; }
@keyframes nudge { 50% { transform: translateY(3px); } }

.debug { position: fixed; z-index: 3; top: 0; left: 50%; transform: translateX(-50%); padding: 4px 10px; background: var(--ink); color: var(--paper); font: 11px/1.4 var(--mono); }
.fatal { position: fixed; z-index: 4; inset: auto var(--gutter) var(--gutter) var(--gutter); padding: 14px; background: #fff; border-left: 3px solid var(--accent); white-space: pre-wrap; font: 13px/1.5 var(--mono); }

/* Fallback sem WebGL */
.fallback { position: relative; z-index: 2; min-height: 100vh; padding: calc(var(--gutter) + 120px) var(--gutter) var(--gutter); display: grid; gap: 24px; max-width: 1100px; margin: 0 auto; }
.fallback-text h2 { font: 400 32px/1.1 var(--serif); margin: 8px 0; }
.fallback-text p { max-width: 60ch; color: var(--ink-soft); }
.fallback-plan svg { width: 100%; height: auto; background: var(--paper); }
body.is-fallback #scene, body.is-fallback .phases, body.is-fallback .caption, body.is-fallback .controls, body.is-fallback .scroll-hint, body.is-fallback #journey { display: none; }

/* Movimento reduzido: sem animações decorativas */
body.is-reduced .scroll-hint span { animation: none; }
@media (prefers-reduced-motion: reduce) { .scroll-hint span { animation: none; } }

/* Telas pequenas */
@media (max-width: 760px) {
  .brand-sub, .brand .eyebrow { display: none; }
  .phases { top: auto; bottom: auto; right: var(--gutter); top: calc(var(--gutter) + 6px); transform: none; }
  .phases ol { grid-auto-flow: column; gap: 0; }
  .phases button { border-left: 0; border-bottom: 1px solid var(--ink-faint); padding: 4px 6px; }
  .phases button.is-active { border-left: 0; border-bottom: 2px solid var(--accent); padding-left: 6px; }
  .phases .lbl { display: none; }
  .caption { right: var(--gutter); bottom: calc(var(--gutter) + 44px); padding: 12px 14px 14px; }
  .caption p:last-child { font-size: 13px; }
  .controls { flex-direction: row; left: var(--gutter); right: auto; align-items: center; }
  .scroll-hint { display: none; }
}
.brand-sub a { color: inherit; }