/* Module 04: one heading, one reading column, three clearly separated sections. */
.night-page {
  max-width: 1300px;
}
.night-page > .page-heading {
  padding: 24px 0 28px;
  align-items: center;
}
.night-page > .page-heading h1 { font-size: 36px; margin-bottom: 8px; }
.night-page > .page-heading p { font-size: 14px; line-height: 1.8; }
.night-root {
  --night-ink: #193236;
  --night-gold: #b78b53;
  --night-muted: #666e64;
  font-size: 14px;
  line-height: 1.85;
}
.night-root h2, .night-root h3 { font-family: var(--serif); font-weight: 400; }
.night-root p { margin-top: 0; }
.night-kicker { color: var(--green); font-size: 12px; letter-spacing: 1px; }

/* One clear starting action; optional comparisons stay in a disclosure. */
.night-start-hint { display: flex; flex-wrap: wrap; gap: 5px 16px; margin: 0 0 18px; font-size: 13px; color: var(--night-muted); }
.night-start-hint span { color: var(--green); }
.night-experience, .night-section { scroll-margin-top: 24px; }

/* The scene and its observation panel share one frame. */
.night-experience {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  border: 1px solid var(--line);
  background: var(--paper-light);
}
.night-view { min-width: 0; color: #eee8d8; background: #0c1113; }
.night-canvas-wrap {
  position: relative;
  width: 100%;
  min-width: 0;
  height: clamp(350px, 34vw, 460px);
  overflow: hidden;
  background: #010203;
}
.night-canvas-wrap canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.night-scene-top {
  position: absolute;
  top: 22px;
  left: 24px;
  right: 24px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 12px;
  color: #9a9f9c;
}
.night-scene-top > span:first-child { display: flex; gap: 8px; align-items: center; }
.night-scene-top i { width: 5px; height: 5px; background: #d0a972; border-radius: 50%; }
.night-scene-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 42px 24px 20px;
  background: linear-gradient(transparent, #010203d9);
  color: #c8c3b7;
  font-size: 13px;
  pointer-events: none;
}
.night-controls { padding: 18px 24px; border-top: 1px solid #6f868244; }
.night-primary-control { display: flex; align-items: center; gap: 18px; }
.night-primary-action { flex-shrink: 0; min-width: 170px; min-height: 46px; padding: 10px 20px; border: 1px solid #c09962; background: #c09962; color: #152b2d; font-size: 14px; }
.night-primary-action:hover { background: #d1ac73; border-color: #d1ac73; }
.night-primary-action:focus-visible, .night-assist summary:focus-visible, .night-control-buttons button:focus-visible { outline: 2px solid #ead5a6; outline-offset: 4px; }
.night-primary-control p { margin: 0; font-size: 12px; line-height: 1.7; color: #c6d2c9; }
.night-assist { margin-top: 15px; padding-top: 11px; border-top: 1px solid #6f868233; }
.night-assist summary { width: fit-content; cursor: pointer; color: #acb9b2; font-size: 12px; }
.night-control-buttons { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 10px; }
.night-control-buttons button { min-height: 34px; padding: 4px 0; border: 0; background: transparent; color: #d3ddcf; font-size: 12px; text-decoration: underline; text-underline-offset: 4px; }
.night-control-buttons button:hover { color: #f0e9d9; }
.night-control-buttons button:disabled { opacity: .4; cursor: default; text-decoration: none; }
.night-aim { display: grid; grid-template-columns: auto minmax(0,1fr) 84px; align-items: center; gap: 14px; margin-top: 15px; font-size: 12px; color: #c6d2c9; }
.night-aim input { width: 100%; min-width: 0; margin: 0; accent-color: #dbb980; }
.night-aim input:disabled { opacity: .4; }
.night-aim > span:last-child { text-align: right; }
.night-observations { padding: 26px; border-left: 1px solid var(--line); display: flex; flex-direction: column; }
.night-observations h2 { font-size: 23px; line-height: 1.5; margin: 8px 0 7px; }
.night-observation-list { list-style: none; padding: 0; margin: 10px 0 0; }
.night-observation-list li { padding: 13px 0; border-top: 1px solid var(--line); }
.night-observation-list h3 { margin: 0 0 5px; font-size: 15px; line-height: 1.6; color: var(--night-ink); }
.night-observation-list p { margin: 0; font-size: 12px; line-height: 1.8; color: var(--night-muted); }
.night-observation-copy { padding: 10px 0 0; }
.night-observation-copy > span { display: block; border-left: 2px solid var(--night-gold); padding-left: 10px; color: var(--green); font-size: 12px; }
.night-simulation-note { padding-top: 18px; margin: auto 0 0; font-size: 12px; line-height: 1.8; color: var(--night-muted); }
.night-view.is-day .night-scene-top { color: #f3f3e8; text-shadow: 0 1px 3px #173030; }

/* Shared section rhythm and evidence panels. */
.night-section { margin-top: 44px; }
.night-section-heading { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 22px; }
.night-section-number { color: var(--red); font: 18px/1.7 Georgia, serif; padding-top: 3px; }
.night-section-heading h2 { font-size: 26px; line-height: 1.5; margin: 0 0 6px; }
.night-section-heading p { margin: 0; color: var(--night-muted); font-size: 14px; }
.night-sky-grid {
  display: grid;
  grid-template-columns: 285px minmax(0, 1fr);
  background: var(--paper-light);
  border: 1px solid var(--line);
}
.night-stat { padding: 30px; border-right: 1px solid var(--line); background: #eaece2; }
.night-stat-label { font-size: 13px; color: var(--green); }
.night-big-number { font: 62px/1.2 Georgia, serif; white-space: nowrap; color: var(--red); margin: 18px 0; }
.night-big-number small { font: 14px var(--serif); margin: 0 6px; }
.night-stat p { font: 20px/1.65 var(--serif); margin-bottom: 16px; }
.night-stat > small { font-size: 12px; color: var(--night-muted); display: block; }
.night-sky-copy { padding: 30px; }
.night-sky-copy h3 { font-size: 21px; line-height: 1.6; margin: 0 0 10px; }
.night-sky-copy > p { margin-bottom: 20px; max-width: 52em; }
.night-timecards { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 0; list-style: none; padding: 18px 0; margin: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.night-timecards li { display: flex; flex-direction: column; align-items: flex-start; padding: 0 18px; border-left: 1px solid var(--line); }
.night-timecards li:first-child { padding-left: 0; border-left: 0; }
.night-timecards span { font-size: 12px; color: var(--night-muted); }
.night-timecards strong { font: 28px/1.5 Georgia, serif; color: var(--night-ink); }
.night-twilight { display: flex; flex-wrap: wrap; gap: 8px 26px; font-size: 12px; color: var(--night-muted); margin: 14px 0 6px!important; }
.night-twilight b { font-weight: 400; margin-left: 6px; }
.night-data-note { margin: 0!important; font-size: 12px; color: var(--night-muted); }
.night-details { border: 1px solid var(--line); background: var(--paper-light); margin-top: 12px; }
.night-details summary { cursor: pointer; padding: 14px 20px; font-size: 13px; color: var(--green); }
.night-details[open] summary { border-bottom: 1px solid var(--line); }
.night-details-content { padding: 18px 24px 22px; }
.night-details-content p { max-width: 80ch; font-size: 13px; color: var(--night-muted); margin-bottom: 14px; }
.night-source-links { display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: 13px; }
.night-source-links a { text-decoration: underline; text-decoration-color: #adb2a7; text-underline-offset: 4px; overflow-wrap: anywhere; }
.night-history-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.night-history-grid article { padding: 24px; background: var(--paper-light); border: 1px solid var(--line); }
.night-history-grid article > span { font-size: 12px; color: var(--red); }
.night-history-grid h3 { font-size: 21px; line-height: 1.5; margin: 9px 0 12px; }
.night-history-grid p { margin: 0; color: var(--night-muted); font-size: 14px; line-height: 1.9; }
.night-history-sources .night-source-links { flex-direction: column; align-items: flex-start; }
.night-record { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 28px 30px; margin-top: 32px; background: #e8e9dd; border: 1px solid #ced4c5; }
.night-record h2 { font-size: 24px; line-height: 1.5; margin: 7px 0; }
.night-record p { margin: 0; font-size: 13px; color: var(--night-muted); }
.night-record .button { flex-shrink: 0; }
.night-page .chapter-nav { margin-top: 24px; }

/* Switch to a single reading column before the sidebar becomes cramped. */
@media (max-width: 1040px) {
  .night-experience { grid-template-columns: minmax(0,1fr) 300px; }
  .night-observations { padding: 22px; }
  .night-sky-grid { grid-template-columns: 250px minmax(0,1fr); }
  .night-stat, .night-sky-copy { padding: 24px; }
  .night-big-number { font-size: 54px; }
  .night-timecards li { padding: 0 10px; }
  .night-timecards strong { font-size: 24px; }
  .night-history-grid article { padding: 20px; }
}
@media (max-width: 880px) {
  .night-experience { grid-template-columns: minmax(0,1fr); }
  .night-canvas-wrap { height: 390px; }
  .night-observations { border-left: 0; border-top: 1px solid var(--line); padding: 24px; }
  .night-observation-list { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 20px; }
  .night-simulation-note { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); }
  .night-history-grid { grid-template-columns: minmax(0,1fr); gap: 12px; }
  .night-history-grid article { padding: 22px 24px; }
  .night-history-grid h3 { margin: 5px 0 8px; }
  .night-record { align-items: flex-start; }
}
@media (max-width: 620px) {
  .night-page > .page-heading { padding: 20px 0 24px; align-items: flex-start; gap: 14px; }
  .night-page > .page-heading h1 { font-size: 30px; }
  .night-page > .page-heading p { font-size: 13px; max-width: 19em; }
  .night-page .progress-block { width: 68px; flex-shrink: 0; padding-top: 12px; }
  .night-start-hint { flex-direction: column; margin-bottom: 14px; font-size: 12px; }
  .night-canvas-wrap { height: 330px; }
  .night-scene-top { left: 16px; right: 16px; top: 17px; font-size: 11px; gap: 8px; }
  .night-scene-caption { padding: 32px 16px 16px; font-size: 12px; }
  .night-controls { padding: 16px; }
  .night-primary-control { flex-direction: column; align-items: stretch; gap: 10px; }
  .night-primary-action { width: 100%; }
  .night-control-buttons { gap: 8px 24px; }
  .night-aim { gap: 10px; grid-template-columns: auto minmax(0,1fr) 78px; font-size: 11px; }
  .night-observations { padding: 21px 18px; }
  .night-observations h2 { font-size: 23px; }
  .night-observation-list { grid-template-columns: minmax(0,1fr); gap: 0; }
  .night-section { margin-top: 32px; }
  .night-section-heading { gap: 10px; margin-bottom: 17px; }
  .night-section-number { font-size: 15px; padding-top: 2px; }
  .night-section-heading h2 { font-size: 23px; }
  .night-section-heading p { font-size: 13px; }
  .night-sky-grid { grid-template-columns: minmax(0,1fr); }
  .night-stat { padding: 23px; border-right: 0; border-bottom: 1px solid var(--line); }
  .night-big-number { font-size: 60px; margin: 12px 0; }
  .night-stat p { font-size: 19px; margin-bottom: 10px; }
  .night-stat p br { display: none; }
  .night-sky-copy { padding: 23px 18px; }
  .night-sky-copy h3 { font-size: 20px; }
  .night-timecards { padding: 13px 0; }
  .night-timecards li { padding: 0 8px; }
  .night-timecards span { font-size: 10px; }
  .night-timecards strong { font-size: 25px; }
  .night-twilight { gap: 6px 12px; }
  .night-details summary { padding: 13px 16px; }
  .night-details-content { padding: 16px; }
  .night-source-links { flex-direction: column; align-items: flex-start; }
  .night-history-grid article { padding: 22px; }
  .night-record { flex-direction: column; align-items: stretch; gap: 20px; padding: 24px; margin-top: 24px; }
  .night-record h2 { font-size: 22px; }
  .night-record .button { width: 100%; }
}