/* ═══════════════════════════════════════════════
   milestone.css — VAS · 里程碑頁面樣式
   章回體 · 十章 · 前半線性 / 後半網狀 · 檔案室藏在 era 末尾
   抽自 milestone.html inline <style>（2026-05-08 收尾）
   依賴：css/tokens.css（變數 + site-nav + reset）
   ═══════════════════════════════════════════════ */

/* ═══════════════════════════════════════════════
   milestone · CHRONICLE · v2 章回體
   十章 · 前半線性 / 後半網狀 · 檔案室藏在 era 末尾
   ═══════════════════════════════════════════════ */

body {
  background: var(--vas-void);
  font-family: var(--vas-serif);
  min-height: 100vh;
  color: var(--vas-ash-0);
}

/* ── nav ── */
.site-nav-links a.active { color: var(--vas-ash-0); }

/* ═══ chapter header ═══ */
.chapter-head {
  padding: 96px 48px 56px;
  max-width: 1180px;
  margin: 0 auto;
}
.chapter-kicker {
  font-family: var(--vas-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--vas-ash-3);
  margin-bottom: 32px;
}
.chapter-title {
  font-family: var(--vas-serif);
  font-weight: 300;
  font-size: clamp(48px, 6.4vw, 80px);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--vas-ash-0);
  margin-bottom: 28px;
}
.chapter-title em { font-style: normal; font-weight: 500; }
.chapter-lede {
  font-family: var(--vas-serif);
  font-size: 18px;
  line-height: 1.95;
  color: var(--vas-ash-1);
  max-width: 38ch;
}
.chapter-lede em {
  font-style: normal; font-weight: 600;
  background: linear-gradient(180deg, transparent 62%, rgba(196, 113, 245, 0.22) 62%);
  padding: 0 0.1em;
}
.chapter-meta {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--vas-rule);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  font-family: var(--vas-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--vas-ash-3);
}
.chapter-meta strong {
  display: block;
  font-family: var(--vas-serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--vas-ash-0);
  text-transform: none;
  margin-top: 6px;
}

/* ═══ 時代分節 ═══ */
.era {
  max-width: 1180px;
  margin: 72px auto 0;
  padding: 0 48px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: baseline;
}
.era-label {
  font-family: var(--vas-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--vas-aurora-violet);
  text-align: right;
  padding-top: 12px;
}
.era-title {
  font-family: var(--vas-serif);
  font-weight: 400;
  font-size: 28px;
  line-height: 1.4;
  color: var(--vas-ash-1);
  letter-spacing: -0.005em;
}
.era-title em {
  font-style: normal;
  font-weight: 600;
  color: var(--vas-ash-0);
}
.era-sub {
  margin-top: 8px;
  font-family: var(--vas-serif);
  font-size: 15px;
  line-height: 1.8;
  color: var(--vas-ash-2);
}

/* ═══ chapter entry ═══ */
.chronicle {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 48px 32px;
  position: relative;
}

.entry {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  padding: 56px 0 56px;
  position: relative;
}

/* 左側：章回編號 + 時間戳 */
.entry-stamp {
  text-align: right;
  position: relative;
  padding-top: 8px;
  padding-right: 15px;
}
.entry-chapter {
  font-family: var(--vas-serif);
  font-weight: 300;
  font-style: italic;
  font-size: 14px;
  color: var(--vas-ash-3-soft);
  letter-spacing: 0.06em;
  margin-bottom: 18px;
}
.entry-chapter em {
  font-style: normal;
  font-size: 56px;
  font-weight: 300;
  color: var(--vas-ash-0);
  display: block;
  line-height: 0.9;
  margin-top: 4px;
  letter-spacing: -0.02em;
}
.entry-unit {
  font-family: var(--vas-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--vas-ash-3-soft);
  margin-top: 20px;
  margin-bottom: 6px;
}
.entry-stamp-value {
  font-family: var(--vas-mono);
  font-size: 12px;
  color: var(--vas-ash-1);
  line-height: 1.7;
  letter-spacing: 0.04em;
}
.entry-tag {
  display: inline-block;
  margin-top: 16px;
  padding: 2px 8px;
  font-family: var(--vas-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--vas-ash-3);
  border: 1px solid var(--vas-rule);
  border-radius: 2px;
}
.entry-tag.is-gate {
  color: rgba(79, 172, 254, 0.85);
  border-color: rgba(79, 172, 254, 0.4);
}
.entry-tag.is-retro {
  color: rgba(250, 113, 205, 0.85);
  border-color: rgba(250, 113, 205, 0.42);
}

/* 右側：wall text + prose */
.entry-body {
  max-width: 58ch;
  padding-top: 2px;
}

/* 新：極簡句——每章開頭，獨立站立 */
.entry-oneliner {
  font-family: var(--vas-serif);
  font-weight: 300;
  font-size: 21px;
  line-height: 1.55;
  color: var(--vas-ash-2);
  letter-spacing: 0.005em;
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px dashed var(--vas-rule);
  max-width: 32ch;
}
.entry-oneliner em {
  font-style: normal;
  font-weight: 500;
  color: var(--vas-ash-0);
}

.entry-title {
  font-family: var(--vas-serif);
  font-weight: 500;
  font-size: 30px;
  line-height: 1.32;
  color: var(--vas-ash-0);
  letter-spacing: -0.015em;
  margin-bottom: 22px;
}
.entry-title em {
  font-style: normal;
  font-weight: 600;
  background: linear-gradient(180deg, transparent 62%, rgba(196, 113, 245, 0.22) 62%);
  padding: 0 0.1em;
}
.entry-prose {
  font-family: var(--vas-serif);
  font-size: 16.5px;
  line-height: 1.95;
  color: var(--vas-ash-1);
  margin-bottom: 20px;
}
.entry-prose + .entry-prose { margin-top: -4px; }

/* pullquote 升級成獨立金句卡 —— 上下大留白、更明顯的停頓 */
.entry-pullquote {
  margin: 48px 0 48px;
  padding: 36px 0 36px 28px;
  border-left: 2px solid var(--vas-aurora-violet);
  font-family: var(--vas-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 19px;
  line-height: 1.75;
  color: var(--vas-ash-0);
  letter-spacing: 0.005em;
}
.entry-pullquote em {
  font-style: normal;
  font-weight: 600;
  color: var(--vas-ash-0);
}

/* 節點：紫色小圓，座落在中軸上 */
.entry::after {
  content: '';
  position: absolute;
  left: 240px;
  top: 72px;
  width: 9px; height: 9px;
  margin-left: -4px;
  border-radius: 50%;
  background: radial-gradient(circle, #c471f5, #fa71cd 60%, transparent 100%);
  box-shadow: 0 0 10px rgba(196, 113, 245, 0.5);
  z-index: 2;
}

/* 中軸 1px 線 */
.chronicle::before {
  content: '';
  position: absolute;
  left: calc(48px + 240px);
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg,
    transparent 0%,
    var(--vas-rule-strong) 4%,
    var(--vas-rule-strong) 96%,
    transparent 100%);
}

/* ═══ 網狀區：後半章回，兩條線並行 ═══ */
.chronicle.is-weave::before {
  background: linear-gradient(180deg,
    var(--vas-rule-strong) 0%,
    var(--vas-rule-strong) 96%,
    transparent 100%);
}
.chronicle.is-weave .entry::after {
  box-shadow: 0 0 14px rgba(196, 113, 245, 0.7);
}
/* 第二條平行線：緊貼實線右側 5px，僅作為背景底色存在 */
.chronicle.is-weave::after {
  content: '';
  position: absolute;
  left: calc(48px + 240px + 5px);
  top: 24px;
  bottom: 24px;
  width: 1px;
  background-image: linear-gradient(180deg,
    rgba(79, 172, 254, 0.18) 0%,
    rgba(79, 172, 254, 0.18) 50%,
    transparent 50%,
    transparent 100%);
  background-size: 1px 6px;
}

/* ═══ 檔案室（完整編年摺疊） ═══ */
.archive {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 48px 80px;
}
.archive-wrap {
  border-top: 1px solid var(--vas-rule);
  padding-top: 32px;
}
.archive summary {
  font-family: var(--vas-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--vas-ash-3);
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  transition: color .3s;
}
.archive summary::-webkit-details-marker { display: none; }
.archive summary::before {
  content: '▸';
  color: var(--vas-aurora-violet);
  transition: transform .3s;
  font-size: 10px;
}
.archive[open] summary::before { transform: rotate(90deg); }
.archive summary:hover { color: var(--vas-ash-1); }
.archive-body {
  margin-top: 24px;
  padding: 24px 0 0 18px;
  font-family: var(--vas-mono);
  font-size: 11.5px;
  line-height: 2.1;
  color: var(--vas-ash-2);
  letter-spacing: 0.02em;
}
.archive-body .arc-line {
  display: grid;
  grid-template-columns: 110px 70px 1fr;
  gap: 24px;
  padding: 2px 0;
  border-bottom: 1px dashed transparent;
}
.archive-body .arc-line:hover {
  border-bottom-color: var(--vas-rule);
  color: var(--vas-ash-1);
}
.archive-body .arc-date { color: var(--vas-ash-3-soft); }
.archive-body .arc-ver { color: var(--vas-aurora-violet); }
.archive-body .arc-ver br { display: none; }
/* 行內紫色圓點連結 */
.inline-dot {
  display: inline-block;
  width: 8px; height: 8px;
  background: radial-gradient(circle, #c471f5, #fa71cd 60%, transparent 100%);
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(196, 113, 245, 0.5);
  vertical-align: middle;
  margin-left: 6px;
}
.arc-divider {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--vas-mono); font-size: 10px;
  letter-spacing: 0.12em; color: var(--vas-ash-3);
  margin: 14px 0;
}
.arc-divider::before, .arc-divider::after {
  content: ''; flex: 1; height: 1px;
  background: var(--vas-rule);
}
.archive-placeholder {
  margin-top: 8px;
  padding: 16px 20px;
  font-family: var(--vas-serif);
  font-size: 13px;
  font-style: italic;
  color: var(--vas-ash-1);
  border-left: 2px solid var(--vas-rule);
}

/* ═══ 章末 colophon ═══ */
.chapter-colophon {
  max-width: 1180px;
  margin: 40px auto 0;
  padding: 48px 48px 64px;
  border-top: 1px solid var(--vas-rule);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 32px;
  align-items: center;
}
.chapter-colophon-left {
  font-family: var(--vas-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--vas-ash-3);
  line-height: 1.9;
}
.chapter-colophon-line {
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--vas-ash-2) 30%,
    var(--vas-aurora-violet) 50%,
    var(--vas-ash-2) 70%,
    transparent 100%);
}
.chapter-colophon-right {
  font-family: var(--vas-serif);
  font-size: 14px;
  color: var(--vas-ash-1);
  text-align: right;
  line-height: 1.9;
}
.chapter-colophon .chapter-sign {
  grid-column: 1 / -1;
  padding: 24px 0 0;
}

/* ═══ 響應式 ═══ */
@media (max-width: 820px) {
  .chapter-head { padding: 56px 24px 32px; }
  .era { grid-template-columns: 1fr; gap: 12px; padding: 0 24px; margin-top: 48px; }
  .era-label { text-align: left; padding-top: 0; }
  .chronicle { padding: 0 24px 24px 60px; }
  .chronicle::before { left: 32px; }
  .chronicle.is-weave::after { left: 42px; }
  .entry { grid-template-columns: 1fr; gap: 20px; padding: 40px 0 40px; }
  .entry::after { left: -28px; top: 40px; margin-left: 0; }
  .entry-stamp { text-align: left; padding: 0; }
  .entry-chapter em { font-size: 42px; }
  .archive { padding: 16px 24px 56px; }
  .archive-body .arc-line { grid-template-columns: 90px 60px 1fr; gap: 12px; }
  .archive-body .arc-ver br { display: inline; }
  .chapter-colophon {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 32px 24px 48px;
  }
  .chapter-colophon-right { text-align: left; }
}

/* ─── Dot Nav · 右側章節指示器 ─── */
.dot-nav {
  position: fixed;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 28px;
  z-index: 40;
}
.dot-nav-item {
  position: relative;
  display: flex;
  align-items: center;
  text-decoration: none;
}
.dn-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--vas-ash-3);
  flex-shrink: 0;
  transition: background .25s, transform .25s, box-shadow .25s, border-color .25s;
}
.dn-label {
  position: absolute;
  right: 14px;
  font-family: var(--vas-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--vas-ash-1);
  white-space: nowrap;
  opacity: 0;
  transform: translateX(6px);
  transition: opacity .2s, transform .2s;
  pointer-events: none;
}
.dot-nav-item:hover .dn-label { opacity: 1; transform: translateX(0); }
.dot-nav-item.is-visited .dn-dot { background: var(--vas-ash-3); border-color: var(--vas-ash-3); }
.dot-nav-item.is-current .dn-dot {
  background: var(--vas-aurora-violet);
  border-color: var(--vas-aurora-violet);
  transform: scale(1.6);
  box-shadow: 0 0 8px rgba(196,113,245,0.45);
}
.dot-nav-item.is-current .dn-label { opacity: 1; transform: translateX(0); color: var(--vas-aurora-violet); }
.dot-nav-item.is-visited .dn-label { color: var(--vas-ash-2); }
.dot-nav-trigger {
  display: none;
  position: fixed;
  top: 90px;
  right: 20px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--vas-ash-1);
  border: none;
  cursor: pointer;
  z-index: 60;
  padding: 0;
  animation: dn-breathe 2.8s ease-in-out infinite;
}
@keyframes dn-breathe {
  0%, 100% { opacity: 0.35; box-shadow: 0 0 4px 1px rgba(240,232,220,0.15); }
  50%       { opacity: 0.85; box-shadow: 0 0 12px 4px rgba(240,232,220,0.35); }
}
@media (max-width: 960px) {
  .dot-nav-trigger { display: block; }
  .dot-nav {
    display: none;
    position: fixed;
    top: 100px;
    right: 16px;
    transform: none;
    background: rgba(14,11,26,0.96);
    border: 1px solid var(--vas-rule);
    border-radius: 10px;
    padding: 20px 24px;
    gap: 20px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 55;
  }
  .dot-nav.is-open { display: flex; }
  .dot-nav-item { flex-direction: row-reverse; gap: 10px; }
  .dn-label {
    position: static;
    opacity: 1 !important;
    transform: none !important;
    font-size: 11px;
    pointer-events: none;
  }
  .dot-nav-item.is-current .dn-label { color: var(--vas-aurora-violet); }
}

/* ─── site-footer ─── */
.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: end;
  padding: 56px 48px 40px;
  max-width: 1040px;
  margin: 0 auto;
  border-top: 1px solid var(--vas-rule);
}
@media (max-width: 768px) {
  .site-footer {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 40px 24px 32px;
  }
  .site-footer .footer-right { text-align: left; }
}