/* ==========================================================================
   Underground, Arrest & Imprisonment — restrained and dark. A continuous
   vertical rule down the left, narrow reading measures, large date markers,
   and one bright release section to break the sequence.
   ========================================================================== */

/* ---------------- Page head ---------------- */
.im-head {
  padding-block: clamp(2.5rem, 5vw, 4rem) clamp(3.5rem, 7vw, 6rem);
  border-bottom: 1px solid var(--rule-night);
}
.im-head__inner { max-width: 54rem; }
.im-head__title {
  font-family: var(--display);
  font-size: clamp(2.2rem, 6.4vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -.025em;
  color: var(--paper);
}
.im-head__span {
  margin-top: 1.6rem;
  font-size: clamp(1.05rem, 1.8vw, 1.4rem);
  letter-spacing: .16em;
  color: var(--brass-lt);
}
.im-head__lede { margin-top: 1.8rem; max-width: 58ch; }

.im-head__marks {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: clamp(2.2rem, 4vw, 3.2rem);
  border-top: 1px solid var(--rule-night);
  list-style: none;
  padding: 0;
}
.im-head__marks li {
  display: grid;
  gap: .3rem;
  padding: 1.1rem clamp(.7rem, 1.5vw, 1.2rem) 0 0;
}
.im-head__marks li + li { padding-left: clamp(.7rem, 1.5vw, 1.2rem); border-left: 1px solid var(--rule-night); }
.im-head__marks .numeral { font-size: clamp(.95rem, 1.4vw, 1.15rem); color: var(--brass-lt); }
.im-head__marks span:last-child {
  font-family: var(--mono);
  font-size: .64rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--night-mute);
}
@media (max-width: 700px) {
  .im-head__marks { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .im-head__marks li:nth-child(odd) { padding-left: 0; border-left: 0; }
  .im-head__marks li:nth-child(3), .im-head__marks li:nth-child(4) { border-top: 1px solid var(--rule-night); margin-top: 1.1rem; }
}

/* ---------------- Numbered sections ---------------- */
.im-sec { padding-block: clamp(3rem, 6vw, 5.5rem); }
.im-sec--alt { background: var(--night-2); }

.im-sec__grid {
  display: grid;
  grid-template-columns: clamp(8rem, 17vw, 15rem) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
}
.im-sec__mark { position: sticky; top: 6.5rem; }
.im-sec__num {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--brass);
  margin-bottom: .7rem;
}
.im-sec__when {
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--night-mute);
  line-height: 1.7;
}

.im-sec__body { border-left: 1px solid var(--rule-night); padding-left: clamp(1.2rem, 3vw, 3rem); }
.im-sec__h {
  font-size: clamp(1.6rem, 3.2vw, 2.5rem);
  margin-bottom: 1.5rem;
  color: var(--paper);
}
.im-prose p { max-width: 60ch; font-size: 1rem; line-height: 1.8; }

.im-callout {
  margin-top: 2rem;
  border: 1px solid var(--rule-night);
  border-left: 2px solid var(--oxblood-lt);
  padding: clamp(1.1rem, 2.2vw, 1.6rem);
  max-width: 60ch;
}
.im-callout__t { font-size: .97rem; line-height: 1.75; color: var(--night-text); margin: 0; }

.im-term {
  margin-top: 2.2rem;
  background: rgba(42, 34, 26, .55);
  border: 1px solid var(--rule-night);
  padding: clamp(1.2rem, 2.4vw, 1.9rem);
  max-width: 62ch;
}
.im-term__h {
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--brass-lt);
  margin-bottom: 1rem;
}
.im-term p { font-size: .94rem; line-height: 1.78; color: var(--night-text); }
.im-term p + p { margin-top: 1rem; }

@media (max-width: 820px) {
  .im-sec__grid { grid-template-columns: minmax(0, 1fr); }
  .im-sec__mark { position: static; display: flex; align-items: baseline; gap: 1.2rem; }
  .im-sec__num { margin-bottom: 0; }
  .im-sec__body { border-left: 0; padding-left: 0; }
}

/* ---------------- 03 The arrest ---------------- */
.im-arrest {
  padding-block: clamp(4rem, 9vw, 8rem);
  border-block: 1px solid var(--rule-night);
  text-align: center;
}
.im-arrest__inner { width: var(--shell); margin-inline: auto; }
.im-arrest__date {
  font-size: clamp(2.6rem, 9vw, 7rem);
  line-height: .95;
  color: var(--oxblood-br);
  letter-spacing: -.02em;
}
.im-arrest__h {
  font-size: clamp(1.4rem, 2.6vw, 2.1rem);
  color: var(--paper);
  font-style: italic;
  font-weight: 400;
  margin-top: .6rem;
  margin-bottom: 2rem;
}
.im-arrest__prose { margin-inline: auto; max-width: 58ch; }
.im-arrest__prose p { max-width: 100%; }

/* ---------------- 06 Release ---------------- */
.im-release { padding-block: clamp(4rem, 9vw, 8rem); border-top: 1px solid var(--rule); }
.im-release__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .65fr);
  gap: clamp(2.2rem, 5vw, 5rem);
  align-items: start;
}
.im-release__year {
  font-size: clamp(4.5rem, 15vw, 12rem);
  line-height: .8;
  color: var(--oxblood);
  letter-spacing: -.035em;
  margin-bottom: .1em;
}
.im-release__h { max-width: 20ch; margin-bottom: 1.6rem; }
.im-release__cta { margin-top: 2.2rem; }
.im-release__fig { max-width: 20rem; margin-top: clamp(1rem, 3vw, 4rem); }

@media (max-width: 900px) {
  .im-release__grid { grid-template-columns: minmax(0, 1fr); }
  .im-release__fig { max-width: 17rem; margin-top: 0; }
}

/* ---------------- 07 Gaps ---------------- */
.im-gaps__head { max-width: 32ch; margin-bottom: clamp(2rem, 4vw, 3rem); }
.gaps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}
.gaps li {
  padding: clamp(1.3rem, 2.4vw, 1.9rem) clamp(.9rem, 1.6vw, 1.4rem) clamp(1.6rem, 2.8vw, 2.2rem) 0;
  border-bottom: 1px solid var(--rule);
}
.gaps li + li { padding-left: clamp(.9rem, 1.6vw, 1.4rem); border-left: 1px solid var(--rule); }
.gaps__h { font-size: clamp(1.02rem, 1.4vw, 1.18rem); margin-bottom: .7rem; line-height: 1.25; }
.gaps__t { font-size: .9rem; line-height: 1.7; color: var(--ink-mute); }
.gaps__t a { color: var(--oxblood); text-underline-offset: .18em; }

@media (max-width: 1000px) {
  .gaps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .gaps li:nth-child(odd) { padding-left: 0; border-left: 0; }
}
@media (max-width: 600px) {
  .gaps { grid-template-columns: minmax(0, 1fr); }
  .gaps li, .gaps li + li { padding-left: 0; border-left: 0; }
}