/* Circle chapter — the interval clock and the three landmarks.
   Tokens only; every colour, size and radius comes from css/style.css. */

#ch-circle .clock-section { margin-top: 56px; }

#ch-circle .clock-layout {
  display: grid; grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
  gap: 30px; align-items: start;
}
@media (max-width: 940px) { #ch-circle .clock-layout { grid-template-columns: 1fr; } }

#ch-circle .clock-wrap { max-width: 380px; margin: 0 auto; width: 100%; }
#ch-circle .clock-wrap svg { width: 100%; height: auto; display: block; }

#ch-circle .clk-axis {
  stroke: var(--line); stroke-width: 1.4; stroke-dasharray: 2 7;
}
#ch-circle .clk-slot { cursor: pointer; }
#ch-circle .clk-slot circle {
  fill: var(--card); stroke: var(--line); stroke-width: 1.6;
  transition: fill 0.2s cubic-bezier(0.22, 1, 0.36, 1),
              stroke 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}
#ch-circle .clk-note {
  font-family: var(--sans); font-weight: 700; font-size: 17.5px; fill: var(--ink);
}
#ch-circle .clk-iv {
  font-family: var(--mono); font-weight: 500; font-size: 11.5px;
  fill: var(--ink-soft); letter-spacing: 0.04em;
}
#ch-circle .clk-slot:hover circle { stroke: var(--accent); }
#ch-circle .clk-slot:focus-visible circle { stroke: var(--accent); stroke-width: 3; }
#ch-circle .clk-slot:focus-visible { outline: none; }

/* Home is ink. The bright half of the wheel wears the chapter marker, the
   flat half is drawn hollow — the same split the intervals themselves make. */
#ch-circle .clk-slot.clk-home circle { fill: var(--ink); stroke: var(--ink); }
#ch-circle .clk-slot.clk-home .clk-note { fill: var(--on-mark); }
#ch-circle .clk-slot.clk-dark circle { stroke-dasharray: 4 3; }
#ch-circle .clk-slot.clk-tt circle { stroke: var(--red); stroke-width: 2.2; }
#ch-circle .clk-slot.on circle { fill: var(--accent); stroke: var(--accent); }
#ch-circle .clk-slot.on .clk-note { fill: var(--on-mark); }

#ch-circle .clock-root {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--ink-soft); max-width: 100%; min-width: 0;
}
#ch-circle .clock-root select { min-width: 0; max-width: 100%; }

#ch-circle .clk-big {
  font-family: var(--serif); font-weight: 700; font-size: 32px;
  color: var(--accent-ink); margin-top: 14px; line-height: 1.15;
}
#ch-circle .clk-pair { font-size: 19px; margin-top: 4px; }
#ch-circle .clk-alt { font-size: 13.5px; color: var(--ink-soft); font-style: italic; }
#ch-circle .clk-steps { font-size: 12.5px; color: var(--ink-soft); margin-top: 6px; }

#ch-circle .clock-sides {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(210px, 100%), 1fr));
  gap: 18px; margin-top: 22px;
}
#ch-circle .cs-head {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-soft);
  padding-bottom: 7px; border-bottom: 1.5px dashed var(--line); margin-bottom: 9px;
}
#ch-circle .cs-list { display: flex; flex-direction: column; gap: 5px; }
#ch-circle .cs-item {
  display: flex; align-items: baseline; gap: 10px; text-align: left;
  padding: 6px 9px; cursor: pointer; border-radius: 6px;
  background: transparent; border: none; color: var(--ink);
  transition: background 0.15s cubic-bezier(0.22, 1, 0.36, 1);
}
#ch-circle .cs-item:hover { background: var(--paper-tint); }
#ch-circle .cs-item:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
#ch-circle .cs-item b {
  font-family: var(--mono); font-size: 13.5px; color: var(--accent-ink);
  min-width: 42px;
}
#ch-circle .cs-item span { font-size: 17.5px; font-weight: 500; }
#ch-circle .cs-item i { font-size: 12.5px; color: var(--ink-soft); }
#ch-circle .cs-note {
  font-size: 13.5px; color: var(--ink-soft); line-height: 1.5; margin-top: 10px;
}
#ch-circle .clock-tri {
  font-size: 16px; line-height: 1.6; margin-top: 20px;
  padding-top: 15px; border-top: 1.5px dashed var(--line); max-width: 62ch;
}

/* ---------- three landmarks ---------- */

#ch-circle .landmark-card { margin-top: 30px; }
#ch-circle .lm-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(190px, 100%), 1fr));
  gap: 16px; margin-top: 18px;
}
#ch-circle .lm-card { border-left: 1.5px dashed var(--line); padding-left: 14px; }
#ch-circle .lm-card:first-child { border-left: none; padding-left: 0; }
@media (max-width: 700px) {
  #ch-circle .lm-card { border-left: none; padding-left: 0;
    border-top: 1.5px dashed var(--line); padding-top: 14px; }
  #ch-circle .lm-card:first-child { border-top: none; padding-top: 0; }
}
#ch-circle .lm-anchor {
  display: flex; align-items: baseline; justify-content: space-between; gap: 8px;
  font-family: var(--serif); font-size: 21px;
}
#ch-circle .lm-anchor .mono { font-size: 12.5px; color: var(--ink-soft); }
#ch-circle .lm-sub { font-size: 12.5px; color: var(--ink-soft); margin: 2px 0 10px; }
#ch-circle .lm-items { display: flex; flex-direction: column; gap: 6px; }
#ch-circle .lm-item {
  display: flex; flex-direction: column; gap: 1px; text-align: left;
  padding: 7px 10px; cursor: pointer; border-radius: 6px;
  background: var(--card); border: 1.5px solid var(--line); color: var(--ink);
  transition: border-color 0.15s cubic-bezier(0.22, 1, 0.36, 1);
}
#ch-circle .lm-item:hover { border-color: var(--accent); }
#ch-circle .lm-item:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
#ch-circle .lm-item.on { border-color: var(--accent); background: var(--paper-tint); }
#ch-circle .lm-sum { font-size: 11.5px; color: var(--ink-soft); letter-spacing: 0.04em; }
#ch-circle .lm-name { font-size: 14.5px; font-weight: 500; }
#ch-circle .lm-foot {
  font-size: 13.5px; color: var(--ink-soft); line-height: 1.6;
  margin-top: 16px; max-width: 68ch;
}

@media (prefers-reduced-motion: reduce) {
  #ch-circle .clk-slot circle,
  #ch-circle .cs-item,
  #ch-circle .lm-item { transition: none; }
}