/* 23 · Princípios — "Portões de segurança"
   Túnel de homologação em CSS 3D: o corredor de luz corre à frente da câmera, cada portão escaneia,
   vira teal com CHECK ✓ e abre; depois dos três, a pista é liberada. Painel de checklist à esquerda. */
#principios { --vpx: 67%; --vpy: 47%; background: transparent; }
#principios .pr-pin { position: relative; height: 100vh; height: 100svh; overflow: hidden; }

/* ---------- Mundo 3D ---------- */
#principios .pr-world { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
#principios .pr-view { position: absolute; inset: 0; perspective: 900px; perspective-origin: var(--vpx) var(--vpy); }
#principios .pr-rig { position: absolute; left: var(--vpx); top: var(--vpy); width: 0; height: 0; transform-style: preserve-3d; }
#principios .pr-scene, #principios .pr-pylons { position: absolute; left: 0; top: 0; width: 0; height: 0; transform-style: preserve-3d; }

#principios .pr-floor {
  position: absolute; left: -2400px; top: -7170px; width: 4800px; height: 7400px;
  transform-origin: 50% 100%; transform: translateZ(700px) rotateX(90deg);
  background-image:
    linear-gradient(rgba(126, 170, 232, 0.2) 3px, transparent 3px),
    linear-gradient(90deg, rgba(126, 170, 232, 0.16) 3px, transparent 3px);
  background-size: 160px 160px;
  background-position: 0 var(--bgy, 0px);
  -webkit-mask-image: linear-gradient(0deg, #000 0%, #000 30%, rgba(0, 0, 0, 0.35) 62%, transparent 88%);
  mask-image: linear-gradient(0deg, #000 0%, #000 30%, rgba(0, 0, 0, 0.35) 62%, transparent 88%);
}
#principios .pr-track {
  position: absolute; left: -330px; top: -7170px; width: 660px; height: 7400px;
  transform-origin: 50% 100%; transform: translateZ(700px) rotateX(90deg) translateZ(1px);
  background:
    linear-gradient(90deg, var(--rail-l, #12c5b5) 0 5px, transparent 5px calc(100% - 5px), var(--rail-r, #1d9fd0) calc(100% - 5px)),
    repeating-linear-gradient(90deg, transparent 0 calc(25% - 2px), rgba(126, 170, 232, 0.28) calc(25% - 2px) 25%),
    linear-gradient(0deg, rgba(18, 197, 181, 0.16), rgba(7, 24, 51, 0.5) 60%, rgba(7, 24, 51, 0));
  box-shadow: 0 0 60px rgba(18, 197, 181, 0.18);
  -webkit-mask-image: linear-gradient(0deg, #000 0%, #000 45%, transparent 92%);
  mask-image: linear-gradient(0deg, #000 0%, #000 45%, transparent 92%);
  transition: filter 0.8s;
}
#principios .pr-track__dash {
  position: absolute; left: 50%; top: 0; bottom: 0; width: 6px; margin-left: -3px;
  background: repeating-linear-gradient(180deg, rgba(230, 247, 255, 0.75) 0 70px, transparent 70px 200px);
  background-position: 0 var(--bgy, 0px);
}
#principios.is-clear .pr-track { filter: brightness(1.6) saturate(1.2); }

/* Postes de luz laterais (reciclados pelo JS) */
#principios .pr-pylon {
  position: absolute; left: -3px; top: 70px; width: 6px; height: 160px; border-radius: 3px;
  background: linear-gradient(180deg, var(--teal-hi), rgba(18, 197, 181, 0.2));
  box-shadow: 0 0 18px var(--teal), 0 0 44px rgba(18, 197, 181, 0.5);
}
#principios .pr-pylon.is-r { background: linear-gradient(180deg, var(--cyan-hi), rgba(29, 159, 208, 0.2)); box-shadow: 0 0 18px var(--cyan), 0 0 44px rgba(29, 159, 208, 0.5); }

/* Corredor de luz (sempre à frente da câmera) */
#principios .pr-trail {
  position: absolute; left: -9px; top: -470px; width: 18px; height: 700px;
  transform-origin: 50% 100%; transform: translateZ(-200px) rotateX(90deg) translateZ(2px);
  background: linear-gradient(0deg, transparent, rgba(79, 240, 220, 0.25) 40%, rgba(230, 247, 255, 0.95));
  border-radius: 9px; filter: blur(2px);
}
#principios .pr-runner { position: absolute; left: -26px; top: 166px; width: 52px; height: 52px; transform: translateZ(-900px); }
#principios .pr-runner i {
  position: absolute; inset: 0; border-radius: 50%;
  background: radial-gradient(circle, #fff 0 22%, rgba(79, 240, 220, 0.95) 34%, rgba(18, 197, 181, 0.35) 55%, transparent 72%);
  box-shadow: 0 0 60px 18px rgba(79, 240, 220, 0.35);
  animation: pr-pulse 0.9s ease-in-out infinite alternate;
}
@keyframes pr-pulse { to { transform: scale(1.18); } }

/* Portal de chegada */
#principios .pr-portal {
  position: absolute; left: -900px; top: -870px; width: 1800px; height: 1100px;
  transform: translateZ(-5900px);
  background:
    radial-gradient(50% 50% at 50% 70%, rgba(255, 255, 255, 0.95), rgba(79, 240, 220, 0.55) 30%, rgba(18, 197, 181, 0.12) 60%, transparent 72%);
  display: grid; place-items: center;
}
#principios .pr-portal__lbl {
  margin-top: 430px; font-family: var(--font-display); font-style: italic; font-weight: 880; font-stretch: 125%;
  font-size: 150px; letter-spacing: 0.04em; text-transform: uppercase; color: rgba(2, 8, 22, 0.55);
  transition: opacity 0.6s;
}
#principios.is-clear .pr-portal__lbl { opacity: 0; }

/* ---------- Portão ---------- */
#principios .pr-gate {
  --gc: #ff5a6e; --open: 0; --scan: 0;
  position: absolute; left: -290px; top: -190px; width: 580px; height: 420px;
  transform: translateZ(var(--gz));
}
#principios .pr-gate.is-scan { --gc: #6fd3ff; }
#principios .pr-gate.is-ok { --gc: #4ff0dc; }
#principios .pr-gate__beam {
  position: absolute; left: -14px; right: -14px; top: 0; height: 70px; z-index: 3;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 0 40px;
  background: linear-gradient(180deg, #0f2a55, #061631);
  border: 1px solid rgba(126, 170, 232, 0.45); border-bottom: 4px solid var(--gc); border-radius: 6px 6px 2px 2px;
  box-shadow: 0 10px 40px -6px var(--gc), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  transition: border-color 0.35s, box-shadow 0.35s;
}
#principios .pr-gate__id { font-family: var(--font-mono); font-size: 17px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-2); }
#principios .pr-gate__name { font-family: var(--font-display); font-style: italic; font-weight: 870; font-stretch: 122%; font-size: 30px; letter-spacing: 0.01em; text-transform: uppercase; color: #fff; }
#principios .pr-gate__state { font-family: var(--font-mono); font-size: 16px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--gc); transition: color 0.35s; }
#principios .pr-gate__post {
  position: absolute; bottom: 0; top: 60px; width: 40px; z-index: 2;
  background: linear-gradient(90deg, #0a1e40, #12305e 45%, #081a38);
  border: 1px solid rgba(126, 170, 232, 0.4); border-radius: 3px;
}
#principios .pr-gate__post::after {
  content: ''; position: absolute; left: 50%; top: 18px; bottom: 16px; width: 6px; margin-left: -3px; border-radius: 3px;
  background: var(--gc); box-shadow: 0 0 16px var(--gc), 0 0 46px var(--gc); transition: background 0.35s, box-shadow 0.35s;
}
#principios .pr-gate__post--l { left: 0; }
#principios .pr-gate__post--r { right: 0; }
#principios .pr-gate__bay { position: absolute; left: 40px; right: 40px; top: 70px; bottom: 0; overflow: hidden; }
#principios .pr-gate__door {
  position: absolute; top: 0; bottom: 0; width: 50%;
  background:
    radial-gradient(circle, rgba(111, 211, 255, 0.34) 1.2px, transparent 1.8px) 0 0 / 14px 14px,
    linear-gradient(180deg, rgba(29, 159, 208, 0.22), rgba(18, 197, 181, 0.12));
  border: 1px solid rgba(111, 211, 255, 0.45);
}
#principios .pr-gate__door--l { left: 0; transform: translateX(calc(var(--open) * -101%)); border-right-color: var(--gc); }
#principios .pr-gate__door--r { right: 0; transform: translateX(calc(var(--open) * 101%)); border-left-color: var(--gc); }
#principios .pr-gate__arm {
  position: absolute; top: 262px; height: 12px; width: 252px; z-index: 1; border-radius: 6px;
  background: repeating-linear-gradient(90deg, var(--gc) 0 30px, #f4f8fc 30px 46px);
  box-shadow: 0 0 18px var(--gc); transition: background 0.35s;
}
#principios .pr-gate__arm--l { left: 38px; transform-origin: 6px 50%; transform: rotate(calc(var(--open) * -78deg)); }
#principios .pr-gate__arm--r { right: 38px; transform-origin: calc(100% - 6px) 50%; transform: rotate(calc(var(--open) * 78deg)); }
#principios .pr-gate__icon, #principios .pr-gate__ok {
  position: absolute; left: 50%; top: 44%; width: 130px; height: 130px; margin: -65px 0 0 -65px; overflow: visible;
  fill: none; stroke-linecap: round; stroke-linejoin: round;
}
#principios .pr-gate__icon { stroke: var(--gc); stroke-width: 3.5; filter: drop-shadow(0 0 8px var(--gc)); opacity: calc(1 - var(--open)); transition: stroke 0.35s; }
#principios .pr-gate.is-ok .pr-gate__icon { opacity: 0; }
#principios .pr-gate__ok { stroke: #fff; stroke-width: 9; filter: drop-shadow(0 0 12px var(--teal-hi)); opacity: 0; transform: scale(0.6); transition: opacity 0.3s, transform 0.45s var(--ease-out); }
#principios .pr-gate.is-ok .pr-gate__ok { opacity: calc(1 - var(--open) * 0.9); transform: scale(1); }
#principios .pr-gate__scan {
  position: absolute; left: 0; right: 0; top: 0; height: 4px; opacity: 0;
  background: #fff; box-shadow: 0 0 18px 5px var(--cyan-hi), 0 0 60px 12px rgba(111, 211, 255, 0.5);
  transform: translateY(calc(var(--scan) * 346px));
}
#principios .pr-gate.is-scan .pr-gate__scan { opacity: 1; }
#principios .pr-gate__halo {
  position: absolute; left: -30%; right: -30%; top: -20%; bottom: -20%; pointer-events: none; opacity: 0;
  background: radial-gradient(closest-side, rgba(79, 240, 220, 0.5), transparent);
  transition: opacity 0.6s var(--ease-out);
}
#principios .pr-gate.is-ok .pr-gate__halo { opacity: calc(0.9 - var(--open) * 0.9); }

/* ---------- Camadas 2D sobre o túnel ---------- */
#principios .pr-fog {
  position: absolute; inset: 0;
  background:
    radial-gradient(22% 7% at var(--vpx) calc(var(--vpy) + 1%), rgba(79, 240, 220, 0.28), transparent 70%),
    radial-gradient(40% 16% at var(--vpx) var(--vpy), rgba(18, 197, 181, 0.10), transparent 75%),
    linear-gradient(180deg, var(--space) 0%, rgba(2, 8, 22, 0) 20%);
}
#principios .pr-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(2, 8, 22, 0.88) 0%, rgba(2, 8, 22, 0.55) 34%, rgba(2, 8, 22, 0) 56%); }
#principios .pr-white {
  position: absolute; inset: 0; opacity: 0;
  background: radial-gradient(50% 60% at var(--vpx) var(--vpy), rgba(230, 247, 255, 0.85), rgba(79, 240, 220, 0.25) 45%, transparent 80%);
}
#principios .pr-hud {
  position: absolute; right: clamp(56px, 5vw, 96px); top: calc(var(--hud-h) + 22px); display: grid; justify-items: end; gap: 6px;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-3);
}
#principios .pr-hud__count { display: inline-flex; align-items: baseline; gap: 10px; }
#principios .pr-hud__count b { font-family: var(--font-display); font-style: italic; font-weight: 860; font-stretch: 118%; font-size: 30px; letter-spacing: 0; color: var(--ink); font-variant-numeric: tabular-nums; }
#principios.is-clear .pr-hud__count b { color: var(--teal-hi); text-shadow: var(--glow-teal); }
#principios .pr-clear {
  position: absolute; left: var(--vpx); top: calc(var(--vpy) - 4%); display: grid; justify-items: center; gap: 12px; text-align: center;
  opacity: 0; visibility: hidden;
}
#principios .pr-clear b {
  font-family: var(--font-display); font-style: italic; font-weight: 880; font-stretch: 125%; text-transform: uppercase;
  font-size: clamp(34px, 4.4vw, 76px); line-height: 0.9; letter-spacing: -0.01em; color: #fff;
  text-shadow: 0 0 30px rgba(79, 240, 220, 0.8), 0 6px 40px rgba(2, 8, 22, 0.6);
}
#principios .pr-clear span { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--navy-900); background: var(--teal-hi); padding: 6px 12px; border-radius: 4px; }

/* ---------- Painel de checklist ---------- */
#principios .pr-copy { position: relative; z-index: 2; height: 100%; display: flex; align-items: center; padding-top: calc(var(--hud-h) + 4px); padding-bottom: 16px; }
#principios .pr-panel {
  width: min(590px, 45vw); padding: clamp(18px, 3vh, 30px) clamp(20px, 2vw, 32px) clamp(16px, 2.4vh, 26px);
  -webkit-backdrop-filter: none; backdrop-filter: none; /* o túnel se move a cada quadro atrás do painel */
  background: linear-gradient(160deg, rgba(16, 42, 84, 0.86) 0%, rgba(7, 24, 51, 0.92) 55%, rgba(5, 20, 46, 0.95) 100%);
}
#principios .pr-panel .t-eyebrow { margin-bottom: clamp(10px, 1.6vh, 18px); }
#principios .pr-title { font-size: clamp(26px, min(2.75vw, 4.6vh), 48px); }
#principios .pr-list { list-style: none; margin: clamp(14px, 2.6vh, 28px) 0 0; padding: 0; counter-reset: pr; }
#principios .pr-item {
  --ic: var(--teal-hi);
  position: relative; display: grid; grid-template-columns: 34px 1fr; column-gap: 14px;
  padding: clamp(8px, 1.4vh, 14px) 0; border-top: 1px solid var(--line);
}
#principios .pr-item::before {
  content: ''; position: absolute; left: 16px; top: calc(clamp(8px, 1.4vh, 14px) + 34px); bottom: calc(-1 * clamp(8px, 1.4vh, 14px)); width: 2px;
  background: linear-gradient(180deg, var(--ic), transparent); opacity: 0.5;
}
#principios .pr-item:last-child::before { display: none; }
#principios .pr-item__led {
  grid-row: 1 / span 3; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center;
  border: 1.5px solid var(--ic); background: rgba(79, 240, 220, 0.12); box-shadow: 0 0 18px rgba(79, 240, 220, 0.35);
}
#principios .pr-item__led svg { width: 20px; height: 20px; fill: none; stroke: var(--ic); stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 20; stroke-dashoffset: 0; transition: stroke-dashoffset 0.5s var(--ease-out) 0.1s; }
#principios .pr-item__meta { display: flex; gap: 12px; align-items: center; margin: 0 0 2px; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-3); }
#principios .pr-item__st { color: var(--ic); font-weight: 700; }
#principios .pr-item__st i { font-style: normal; display: none; }
#principios .pr-item__st .st-ok { display: inline; }
#principios .pr-item__t { grid-column: 2; margin: 0; font-family: var(--font-display); font-style: italic; font-weight: 860; font-stretch: 120%; font-size: clamp(20px, min(1.9vw, 3.2vh), 30px); line-height: 1.05; text-transform: uppercase; letter-spacing: 0; color: var(--ink); }
#principios .pr-item__txt { grid-column: 2; margin: 4px 0 0; font-size: clamp(16px, min(1.12vw, 2.2vh), 17.5px); line-height: 1.42; color: var(--ink-2); }
#principios .pr-note { margin: clamp(10px, 1.8vh, 18px) 0 0; padding-left: 14px; border-left: 2px solid var(--teal); font-size: clamp(16px, min(1.05vw, 2vh), 16.5px); line-height: 1.42; color: var(--ink-2); }

/* Estados controlados pelo scroll (só com a animação armada) */
#principios.pr-armed .pr-item { --ic: var(--ink-4); transition: opacity 0.4s; }
#principios.pr-armed .pr-item.is-scan { --ic: var(--cyan-hi); }
#principios.pr-armed .pr-item.is-ok { --ic: var(--teal-hi); }
#principios.pr-armed .pr-item__led { background: transparent; box-shadow: none; transition: border-color 0.35s, background 0.35s, box-shadow 0.35s; }
#principios.pr-armed .pr-item.is-scan .pr-item__led { background: rgba(111, 211, 255, 0.1); animation: pr-ping 0.8s ease-in-out infinite alternate; }
#principios.pr-armed .pr-item.is-ok .pr-item__led { background: rgba(79, 240, 220, 0.14); box-shadow: 0 0 18px rgba(79, 240, 220, 0.4); }
@keyframes pr-ping { to { box-shadow: 0 0 0 6px rgba(111, 211, 255, 0.12), 0 0 20px rgba(111, 211, 255, 0.5); } }
#principios.pr-armed .pr-item__led svg { stroke-dashoffset: 20; }
#principios.pr-armed .pr-item.is-ok .pr-item__led svg { stroke-dashoffset: 0; }
#principios.pr-armed .pr-item__st .st-ok { display: none; }
#principios.pr-armed .pr-item:not(.is-scan):not(.is-ok) .st-wait,
#principios.pr-armed .pr-item.is-scan:not(.is-ok) .st-scan,
#principios.pr-armed .pr-item.is-ok .st-ok { display: inline; }
#principios.pr-armed .pr-item__t { transition: color 0.4s; color: var(--ink-3); }
#principios.pr-armed .pr-item.is-scan .pr-item__t, #principios.pr-armed .pr-item.is-ok .pr-item__t { color: var(--ink); }
#principios.pr-armed .pr-item__txt { opacity: 0.28; transform: translateY(4px); filter: blur(1.5px); transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out), filter 0.5s; }
#principios.pr-armed .pr-item.is-ok .pr-item__txt { opacity: 1; transform: none; filter: none; }
#principios.pr-armed .pr-note { opacity: 0.35; transition: opacity 0.6s, border-color 0.6s; border-left-color: var(--ink-4); }
#principios.pr-armed.is-clear .pr-note { opacity: 1; border-left-color: var(--teal-hi); }

/* Estados dos portões no 3D: textos do feixe */
#principios .pr-gate__state i { font-style: normal; display: none; }
#principios .pr-gate:not(.is-scan):not(.is-ok) .st-wait,
#principios .pr-gate.is-scan:not(.is-ok) .st-scan,
#principios .pr-gate.is-ok .st-ok { display: inline; }

/* ---------- Telas baixas ---------- */
@media (min-width: 821px) and (max-height: 760px) {
  #principios .pr-item__txt { margin-top: 2px; }
  #principios .pr-hud { top: calc(var(--hud-h) + 10px); }
}
@media (max-width: 1080px) and (min-width: 821px) {
  #principios { --vpx: 73%; }
  #principios .pr-panel { width: min(520px, 50vw); }
}

/* ---------- Celular: túnel fixo ao fundo, checklist rola por cima ---------- */
@media (max-width: 820px) {
  #principios { --vpx: 50%; --vpy: 40%; }
  #principios .pr-pin { height: auto; overflow: visible; }
  #principios .pr-world { position: sticky; top: 0; height: 100vh; height: 100svh; }
  #principios .pr-view { perspective: 700px; }
  #principios .pr-shade { background: linear-gradient(0deg, rgba(2, 8, 22, 0.75) 0%, rgba(2, 8, 22, 0.1) 45%, rgba(2, 8, 22, 0.2) 100%); }
  #principios .pr-hud { right: var(--gutter); top: calc(var(--hud-h) + 10px); }
  #principios .pr-hud__lbl { display: none; }
  #principios .pr-hud__count b { font-size: 22px; }
  #principios .pr-clear { top: 32%; }
  #principios .pr-clear b { font-size: 40px; }
  #principios .pr-clear span { font-size: 10px; letter-spacing: 0.08em; white-space: nowrap; }
  #principios .pr-copy { display: block; height: auto; margin-top: -100svh; padding: 0 var(--gutter); }
  #principios .pr-panel { width: 100%; padding: 0; background: none; box-shadow: none; -webkit-backdrop-filter: none; backdrop-filter: none; }
  #principios .pr-panel::before { display: none; }
  #principios .pr-head {
    position: relative; margin-top: 60svh; padding: 18px 18px 20px; border-radius: 16px;
    background: linear-gradient(160deg, rgba(11, 33, 69, 0.92), rgba(3, 11, 28, 0.94)); box-shadow: inset 0 0 0 1px var(--line-2), var(--shadow-deep);
  }
  #principios .pr-head .t-eyebrow { margin-bottom: 12px; }
  #principios .pr-title { font-size: clamp(26px, 7.4vw, 40px); }
  #principios .pr-list { margin-top: 56svh; }
  #principios .pr-item {
    margin-bottom: 62svh; padding: 18px 18px 18px 14px; border-top: 0; border-radius: 16px;
    background: linear-gradient(160deg, rgba(11, 33, 69, 0.9), rgba(3, 11, 28, 0.92)); box-shadow: inset 0 0 0 1px var(--line-2), var(--shadow-deep);
  }
  #principios .pr-item::before { display: none; }
  #principios .pr-item__t { font-size: 26px; }
  #principios .pr-item__txt { font-size: 16px; }
  #principios .pr-note { margin: 0 0 12svh; padding: 16px 16px 16px 18px; border-radius: 12px; background: rgba(3, 11, 28, 0.88); font-size: 15px; }
}

/* ---------- Movimento reduzido: tudo visível, em fluxo ---------- */
.reduced #principios .pr-pin { height: auto; min-height: 100svh; }
.reduced #principios .pr-copy { height: auto; padding-block: clamp(104px, 14vh, 176px) clamp(64px, 10vh, 120px); }
.reduced #principios .pr-runner i, .reduced #principios .pr-item__led { animation: none !important; }
@media (max-width: 820px) {
  .reduced #principios .pr-world { position: absolute; inset: 0 0 auto 0; height: 100svh; }
  .reduced #principios .pr-copy { margin-top: 0; padding-top: 52svh; }
  .reduced #principios .pr-head { margin-top: 0; }
  .reduced #principios .pr-list { margin-top: 24px; }
  .reduced #principios .pr-item { margin-bottom: 14px; }
  .reduced #principios .pr-note { margin-bottom: 0; }
}