/**
 * D//TA Tunnel Route — preloader component styles
 * Depends on tokens.css
 */

.dlta-preloader,
.dlta-preloader * ,
.dlta-preloader *::before,
.dlta-preloader *::after {
  box-sizing: border-box;
}

.dlta-preloader {
  position: fixed;
  inset: 0;
  z-index: var(--dlta-z, 100);
  display: grid;
  place-items: center;
  background: var(--dlta-bg);
  color: var(--dlta-fg);
  font-family: var(--dlta-font-ui);
  font-weight: var(--dlta-font-weight-ui);
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
  transition: opacity var(--dlta-exit-ms) ease, transform var(--dlta-exit-ms) ease;
}

.dlta-preloader button,
.dlta-preloader h1,
.dlta-preloader p {
  font-family: inherit;
  margin: 0;
}

.dlta-preloader.is-leaving {
  opacity: 0;
  transform: translateY(var(--dlta-exit-shift));
  pointer-events: none;
}

.dlta-preloader.is-done {
  visibility: hidden;
}

/* —— Corner ticks —— */
.dlta-preloader .ticks span {
  position: absolute;
  width: 0.8rem;
  height: 0.8rem;
  border: 0 solid var(--dlta-tick);
}

.dlta-preloader .ticks .nw { top: 1.1rem; left: 1.1rem; border-top-width: 1px; border-left-width: 1px; }
.dlta-preloader .ticks .ne { top: 1.1rem; right: 1.1rem; border-top-width: 1px; border-right-width: 1px; }
.dlta-preloader .ticks .sw { bottom: 1.1rem; left: 1.1rem; border-bottom-width: 1px; border-left-width: 1px; }
.dlta-preloader .ticks .se { bottom: 1.1rem; right: 1.1rem; border-bottom-width: 1px; border-right-width: 1px; }

/* —— HUD —— */
.dlta-preloader .hud {
  position: absolute;
  margin: 0;
  color: var(--dlta-muted);
  font-family: var(--dlta-font-ui);
  font-size: 0.68rem;
  font-weight: var(--dlta-font-weight-ui);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.dlta-preloader .hud-slash { color: var(--dlta-signal, #e7c27a); }
.dlta-preloader .hud-tl { top: 1.15rem; left: 2.3rem; }
.dlta-preloader .hud-tr { top: 1.15rem; right: 2.3rem; }
.dlta-preloader .hud-bl { bottom: 1.15rem; left: 2.3rem; }
.dlta-preloader .hud-br { bottom: 1.15rem; right: 2.3rem; }

/* —— Lockup —— */
.dlta-preloader .lockup {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.15rem;
}

.dlta-preloader .mark {
  display: block;
  width: min(var(--dlta-mark-vw), var(--dlta-mark-max));
  overflow: visible;
}

.dlta-preloader .mark-route,
.dlta-preloader .mark-base,
.dlta-preloader .mark-rib,
.dlta-preloader .orbit,
.dlta-preloader .echo {
  fill: none;
  stroke-linejoin: miter;
  stroke-linecap: butt;
  stroke-width: var(--dlta-stroke);
}

.dlta-preloader .mark-route { stroke: var(--dlta-fg); }

.dlta-preloader .mark-base {
  stroke: var(--dlta-signal);
  opacity: 0;
}

.dlta-preloader .mark-base.is-hot { opacity: 1; }

/* 4th face — gold rib parallel to left edge */
.dlta-preloader .mark-rib {
  stroke: var(--dlta-signal);
}

.dlta-preloader .orbit {
  stroke: var(--dlta-signal);
  stroke-dasharray: 18 252;
  opacity: 0;
}

.dlta-preloader .orbit.is-on {
  opacity: 1;
  animation: dlta-orbit 2.4s linear infinite;
}

.dlta-preloader .echo {
  stroke: var(--dlta-fg);
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
}

.dlta-preloader .echo.is-on {
  animation: dlta-tunnel 620ms var(--dlta-ease) forwards;
}

.dlta-preloader .echo-b.is-on {
  animation-delay: 110ms;
  animation-duration: 760ms;
}

.dlta-preloader .node {
  fill: var(--dlta-fg);
  transform-box: fill-box;
  transform-origin: center;
}

/* —— Wordmark (Science Gothic) —— */
.dlta-preloader .wordmark {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.1em;
  font-family: var(--dlta-font-display);
  font-weight: var(--dlta-font-weight-brand);
  font-stretch: var(--dlta-font-stretch, normal);
  font-size: clamp(2.7rem, 11vw, 4.8rem);
  line-height: 0.8;
  letter-spacing: 0;
  min-height: 0.85em;
}

.dlta-preloader .glyph {
  position: relative;
  display: inline-flex;
}

.dlta-preloader .glyph-sizer { visibility: hidden; }

.dlta-preloader .glyph-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dlta-muted);
}

.dlta-preloader .glyph-face.is-locked {
  color: var(--dlta-fg);
  animation: dlta-lockflash 200ms linear;
}

.dlta-preloader .glyph-face.is-signal { color: var(--dlta-signal); }

/* —— Status —— */
.dlta-preloader .status {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 1rem;
  color: var(--dlta-fg);
  font-family: var(--dlta-font-ui);
  font-size: 0.72rem;
  font-weight: var(--dlta-font-weight-ui);
  letter-spacing: 0.26em;
  text-transform: uppercase;
  opacity: 0;
}

.dlta-preloader .status.is-on { opacity: 1; }

.dlta-preloader .status-slot { position: relative; }
.dlta-preloader .status-sizer { visibility: hidden; }

.dlta-preloader .status-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  white-space: nowrap;
}

.dlta-preloader .dot {
  width: 0.38rem;
  height: 0.38rem;
  background: var(--dlta-signal);
  transform: scale(0);
  transition: transform 240ms var(--dlta-ease-pop);
}

.dlta-preloader .dot.is-on { transform: scale(1); }

.dlta-preloader .caret {
  display: inline-block;
  width: 0.45em;
  height: 0.85em;
  margin-left: 0.28em;
  background: var(--dlta-signal);
  vertical-align: -0.05em;
  animation: dlta-blink 0.8s steps(1) infinite;
}

/* —— Optional stop control —— */
.dlta-preloader .preloader-stop {
  position: absolute;
  bottom: max(1.35rem, env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: transparent;
  color: var(--dlta-muted);
  font-family: var(--dlta-font-ui);
  font-weight: var(--dlta-font-weight-ui);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.65rem 1.2rem;
  cursor: pointer;
  opacity: 0.55;
  transition: border-color 0.25s ease, color 0.25s ease, opacity 0.25s;
}

.dlta-preloader .preloader-stop:hover,
.dlta-preloader .preloader-stop:focus-visible {
  border-color: color-mix(in srgb, var(--dlta-signal) 45%, transparent);
  color: var(--dlta-signal);
  opacity: 1;
  outline: none;
}

.dlta-preloader.is-leaving .preloader-stop,
.dlta-preloader.is-done .preloader-stop {
  pointer-events: none;
  opacity: 0;
}

.dlta-preloader[data-controls="false"] .preloader-stop {
  display: none;
}

@keyframes dlta-orbit {
  to { stroke-dashoffset: -270; }
}

@keyframes dlta-tunnel {
  0% { transform: scale(0.88); opacity: 0.4; }
  100% { transform: scale(1.72); opacity: 0; }
}

@keyframes dlta-lockflash {
  0% { opacity: 0.15; }
  100% { opacity: 1; }
}

@keyframes dlta-blink {
  0%, 45% { opacity: 1; }
  46%, 100% { opacity: 0; }
}

@media (max-width: 380px) {
  .dlta-preloader .hud { letter-spacing: 0.1em; }
  .dlta-preloader .hud-tr,
  .dlta-preloader .hud-br { right: 1.7rem; }
  .dlta-preloader .hud-tl,
  .dlta-preloader .hud-bl { left: 1.7rem; }
}

@media (prefers-reduced-motion: reduce) {
  .dlta-preloader .orbit,
  .dlta-preloader .echo,
  .dlta-preloader .glyph-face.is-locked,
  .dlta-preloader .caret {
    animation: none;
  }

  .dlta-preloader {
    transition: none;
  }
}