/* Layout: the three screens (start, lab, debrief) and how they collapse. */

.app {
  height: 100%;
}

.boot {
  padding: 48px 24px;
  font-family: var(--mono);
  font-size: var(--fs-small);
}

/* ---------- start and debrief: ordinary scrolling pages ---------- */

.page {
  max-width: 1160px;
  margin: 0 auto;
  padding-block: 40px 72px;
  padding-inline: clamp(16px, 4vw, 40px);
}

/* ---------- lab: a one-screen app with three scrolling columns ---------- */

.screen-lab {
  height: 100%;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}

.topbar {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: var(--gap-4);
  padding: 10px clamp(16px, 2vw, 24px);
  background: var(--paper);
  border-bottom: var(--rule) solid var(--ink);
}

.lab {
  display: grid;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr) minmax(340px, 440px);
  min-height: 0;
}

.brief,
.session,
.gate {
  min-width: 0;
  min-height: 0;
}

.brief {
  overflow: auto;
  padding: var(--gap-5) var(--gap-5) var(--gap-7);
  border-right: var(--rule) solid var(--ink);
}

.session {
  overflow: auto;
  background: var(--field);
  color: var(--field-ink);
  scroll-behavior: smooth;
}

.gate {
  display: flex;
  flex-direction: column;
  border-left: var(--rule) solid var(--ink);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
}

.gate-scroll {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: var(--gap-5) var(--gap-5) var(--gap-6);
}

.decide {
  flex: none;
  padding: var(--gap-4) var(--gap-5);
  border-top: var(--rule) solid var(--ink);
  background: var(--paper);
}

.ticket-toggle {
  display: none;
}

/* Medium screens: the ticket becomes a drawer. */
@media (max-width: 1180px) {
  .lab {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  }

  .ticket-toggle {
    display: inline-flex;
  }

  .brief {
    position: fixed;
    z-index: 4;
    top: 0;
    bottom: 0;
    left: 0;
    width: min(360px, 92vw);
    background: var(--paper);
    border-right: var(--rule) solid var(--ink);
    padding-top: calc(var(--gap-5) + env(safe-area-inset-top, 0px));
    transform: translateX(-102%);
    transition: transform 180ms ease;
    visibility: hidden;
  }

  .brief.is-open {
    transform: none;
    visibility: visible;
  }
}

/* Phones: one column, the page scrolls, the decision bar is pinned. */
@media (max-width: 820px) {
  .screen-lab {
    height: auto;
    display: block;
  }

  .lab {
    display: block;
  }

  .session {
    overflow: visible;
  }

  .gate {
    border-left: 0;
    border-top: var(--rule) solid var(--ink);
  }

  .gate-scroll {
    overflow: visible;
    padding: var(--gap-5) var(--gap-4) calc(140px + env(safe-area-inset-bottom, 0px));
  }

  .decide {
    position: fixed;
    z-index: 3;
    left: 0;
    right: 0;
    bottom: 0;
    padding: var(--gap-3) var(--gap-4) calc(var(--gap-3) + env(safe-area-inset-bottom, 0px));
  }

  .topbar {
    position: sticky;
    top: env(safe-area-inset-top, 0px);
    flex-wrap: wrap;
    row-gap: var(--gap-2);
  }
}