/* ── Links ── */
a { color: var(--accent2); text-decoration: none; }
a:hover { color: var(--accent3); }

code {
  font-family: 'SFMono-Regular', Consolas, monospace;
  background: var(--paper-mid);
  color: var(--accent1);
  padding: 1px 6px;
  border-radius: 2px;
  font-size: 0.88em;
}

/* ── LAYOUT ── */
.container { max-width: 860px; margin: 0 auto; padding: 0 2rem; }

/* ── STICKY TOOLBAR（錨點列 + 搜尋按鈕）── */
/* top 略小於固定 .nav 高度（約 62px），避免兩者之間露出縫隙 */
.page-tools {
  position: sticky;
  top: 3.8rem;
  z-index: 90;
  margin-top: 4.2rem;
  background: var(--paper-warm);
  border-bottom: 1px solid var(--paper-mid);
}
.tools-row { display: flex; align-items: stretch; }

/* 點錨點跳轉、搜尋跳轉時，章節不被固定導覽列 + 錨點列蓋住 */
.ws-section[id] { scroll-margin-top: 7rem; }
.substep[id] { scroll-margin-top: 8.5rem; }

/* ── ANCHOR NAV ── */
.anchor-nav {
  flex: 1;
  min-width: 0;
  position: relative;
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  overflow-x: auto;
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.anchor-nav::-webkit-scrollbar { display: none; }
/* 內容放得下就置中；放不下就從左邊開始橫向捲動（justify-content:center 會把左邊切掉） */
.anchor-nav > :first-child { margin-left: auto; }
.anchor-nav > :last-child { margin-right: auto; }
.anchor-link {
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--text-soft);
  padding: 0.25rem 0.7rem;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.anchor-link:hover { color: var(--accent2); }
.anchor-link.active { color: var(--accent1); border-bottom-color: var(--accent2); }
.anchor-link:focus-visible,
.search-toggle:focus-visible { outline: 2px solid var(--accent2); outline-offset: 2px; }
.anchor-sep { color: var(--paper-mid); font-size: 0.8rem; }

/* ── HERO ── */
.hero {
  background: var(--ink);
  padding: 8rem 2rem 5rem;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 80%, rgba(196,149,106,0.1) 0%, transparent 65%),
    linear-gradient(160deg, #1c1a17 0%, #252018 60%, #1e1b14 100%);
}
.hero-lines { position: absolute; inset: 0; pointer-events: none; }
.hero-lines svg { width: 100%; height: 100%; }

.hero-inner {
  position: relative; z-index: 2;
  max-width: 680px;
  margin: 0 auto;
}
.hero-label {
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.88rem;
  color: var(--accent3);
  letter-spacing: 0.25em;
  margin-bottom: 1.4rem;
  opacity: 0;
  animation: fadeUp 0.9s 0.2s ease forwards;
}
.hero-title {
  font-family: 'Noto Serif TC', serif;
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 600;
  color: var(--paper);
  letter-spacing: 0.08em;
  line-height: 1.25;
  margin-bottom: 1.2rem;
  opacity: 0;
  animation: fadeUp 0.9s 0.4s ease forwards;
}
.hero-divider {
  width: 40px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent3), transparent);
  margin: 0 auto 1.2rem;
  opacity: 0;
  animation: fadeIn 0.9s 0.6s ease forwards;
}
.hero-instructor {
  font-size: 0.78rem;
  color: rgba(250,247,242,0.35);
  letter-spacing: 0.12em;
  line-height: 2;
  opacity: 0;
  animation: fadeUp 0.9s 0.75s ease forwards;
}
.hero-instructor a { color: rgba(250,247,242,0.35); transition: color 0.2s; }
.hero-instructor a:hover { color: var(--accent3); }

/* ── SECTION COMMONS ── */
.ws-section { padding: 5rem 2rem; }
.ws-section.warm { background: var(--paper-warm); }
.ws-section.ink {
  background: var(--ink);
  padding: 5rem 2rem 6rem;
}

.section-label {
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  color: var(--accent2);
  margin-bottom: 0.5rem;
}
.ws-section.ink .section-label { color: var(--accent3); }

.section-title {
  font-family: 'Noto Serif TC', serif;
  font-size: clamp(1.3rem, 3.5vw, 1.8rem);
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 0.06em;
  line-height: 1.3;
  margin-bottom: 0.4rem;
}
.ws-section.ink .section-title { color: var(--paper); }

.section-rule {
  width: 40px; height: 2px;
  background: var(--accent2);
  margin-bottom: 2rem;
}
.ws-section.ink .section-rule { background: var(--accent3); }

.section-sub {
  font-size: 0.85rem;
  color: var(--text-mid);
  line-height: 2;
  margin-bottom: 2rem;
}

/* ── TOOLS TABLE ── */
.tools-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--paper-mid);
}
.tools-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}
.tools-table th {
  background: var(--paper-warm);
  color: var(--accent2);
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  padding: 10px 16px;
  text-align: left;
  border-bottom: 2px solid var(--paper-mid);
  font-weight: 400;
}
.tools-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--paper-mid);
  color: var(--text-mid);
  vertical-align: middle;
}
.tools-table tr:last-child td { border-bottom: none; }
.tools-table strong { color: var(--text-main); font-weight: 500; }
.tools-table a { color: var(--accent2); font-size: 0.8rem; }
.tools-table a:hover { color: var(--accent3); }

/* ── WEBSITE STRUCTURE ── */
.structure-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5px;
  background: var(--paper-mid);
  border: 1px solid var(--paper-mid);
}
@media (max-width: 560px) { .structure-grid { grid-template-columns: 1fr; } }
.structure-item {
  display: flex;
  gap: 1.4rem;
  align-items: flex-start;
  background: var(--paper);
  padding: 1.4rem 1.6rem;
  transition: background 0.3s;
  position: relative;
  overflow: hidden;
}
.structure-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 0; height: 2px;
  background: var(--accent3);
  transition: width 0.35s ease;
}
.structure-item:hover { background: var(--paper-warm); }
.structure-item:hover::before { width: 100%; }
.structure-num {
  font-family: 'EB Garamond', serif;
  font-size: 2rem;
  color: rgba(196,149,106,0.22);
  flex-shrink: 0;
  line-height: 1;
  margin-top: -2px;
}
.structure-content { flex: 1; }
.structure-content strong {
  display: block;
  font-family: 'Noto Serif TC', serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.structure-content span { font-size: 0.78rem; color: var(--text-soft); line-height: 1.9; }

/* ── STEP HEADER ── */
.step-header { margin-bottom: 1.8rem; }
.step-eyebrow {
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  color: var(--accent3);
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.step-eyebrow::before {
  content: '';
  display: inline-block;
  width: 28px; height: 1px;
  background: var(--accent3);
  flex-shrink: 0;
}

/* ── STEP URL ── */
.step-url {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--paper-warm);
  border-left: 2px solid var(--accent2);
  padding: 0.8rem 1.2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.url-label {
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--accent2);
  flex-shrink: 0;
}
.url-link {
  font-family: 'Noto Serif TC', serif;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-main);
  letter-spacing: 0.04em;
}
.url-hint { font-size: 0.78rem; color: var(--text-soft); }

/* ── CHECKLIST ── */
.checklist { display: flex; flex-direction: column; gap: 2px; margin-bottom: 2rem; }
.check-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  font-size: 0.85rem;
  color: var(--text-mid);
  line-height: 1.8;
  cursor: pointer;
  padding: 0.5rem 0.6rem;
  border-radius: 2px;
  transition: background 0.15s;
}
.check-item:hover { background: var(--paper-warm); }
.check-input { display: none; }
.check-box {
  width: 16px; height: 16px;
  border: 1.5px solid var(--text-soft);
  border-radius: 2px;
  flex-shrink: 0;
  margin-top: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, background 0.15s;
  position: relative;
}
.check-box::after {
  content: '';
  display: block;
  width: 3px; height: 7px;
  border: 1.5px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translateY(-1px);
  opacity: 0;
  transition: opacity 0.15s;
}
.check-input:checked ~ .check-box { background: var(--accent3); border-color: var(--accent3); }
.check-input:checked ~ .check-box::after { opacity: 1; }
.check-input:checked ~ .check-text {
  color: var(--text-soft);
  text-decoration: line-through;
  text-decoration-color: var(--paper-mid);
}
.check-text { flex: 1; }
.check-text strong { color: var(--text-main); font-weight: 500; }
.check-input:checked ~ .check-text strong { color: var(--text-soft); }

.sub-notes {
  margin-top: 5px;
  padding-left: 1rem;
  list-style: none;
  font-size: 0.78rem;
  color: var(--text-soft);
  line-height: 2;
}
.sub-notes li::before { content: '— '; color: var(--accent3); }

/* ── NOTE BOX ── */
.note-box {
  border-left: 2px solid var(--accent2);
  background: var(--paper-warm);
  padding: 0.8rem 1.4rem;
  margin-bottom: 2rem;
  font-size: 0.82rem;
}
.note-title {
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--accent2);
  margin-bottom: 8px;
}
.note-item { color: var(--text-mid); margin-bottom: 5px; line-height: 1.9; }
.note-item:last-child { margin-bottom: 0; }
.note-q { font-weight: 500; color: var(--text-main); margin-right: 4px; }

/* ── CODE BLOCK ── */
.code-block-wrap { margin: 1.2rem 0; }
.code-block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 6px;
}
.code-label {
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--accent2);
  margin-bottom: 0;
}
.copy-btn {
  font-family: 'Noto Sans TC', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--accent2);
  background: transparent;
  border: 1px solid var(--accent2);
  border-radius: 3px;
  padding: 3px 10px;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}
.copy-btn:hover { background: var(--accent2); color: var(--paper); }
.copy-btn.copied { background: var(--accent3); color: var(--paper); border-color: var(--accent3); }
.code-block {
  background: var(--ink);
  color: rgba(212,169,106,0.85);
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  font-size: 0.78rem;
  line-height: 1.9;
  padding: 1.2rem 1.6rem;
  border-left: 2px solid rgba(212,169,106,0.3);
  overflow-x: auto;
  white-space: pre;
  tab-size: 2;
}
.hint { font-size: 0.78rem; color: var(--text-soft); margin-top: 0.6rem; line-height: 1.9; }

/* ── RESULT BOX ── */
.result-box {
  background: var(--paper-warm);
  border: 1px solid var(--paper-mid);
  border-top: 2px solid var(--accent2);
  padding: 1.2rem 1.6rem;
  margin-top: 1.4rem;
  text-align: center;
}
.result-label {
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--accent2);
  margin-bottom: 6px;
}
.result-url {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.9rem;
  color: var(--text-main);
  letter-spacing: 0.04em;
}

/* ── SUBSTEP ── */
.substep { margin-bottom: 2.5rem; }
.substep:last-child { margin-bottom: 0; }
.substep-title {
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  color: var(--accent2);
  margin-bottom: 1.2rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--paper-mid);
}

/* ── DESIGN STYLE CARDS ── */
.style-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(155px, 1fr));
  gap: 2rem;
}
.style-card {
  background: var(--paper);
  padding: 1.6rem 1.4rem;
  border-bottom: 2px solid var(--paper-mid);
  transition: border-color 0.3s, transform 0.3s;
}
.style-card:hover { border-color: var(--accent2); transform: translateY(-3px); }
.style-area {
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--accent2);
  margin-bottom: 0.4rem;
}
.style-name {
  font-family: 'Noto Serif TC', serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}
.style-desc { font-size: 0.75rem; color: var(--text-soft); line-height: 1.9; }

/* ── OPTIMIZE BLOCKS ── */
.optimize-block { margin-bottom: 2.5rem; }
.optimize-block:last-child { margin-bottom: 0; }
.optimize-area {
  font-family: 'EB Garamond', serif;
  font-style: italic;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--accent2);
  margin-bottom: 6px;
}

/* ── QUICK REFERENCE (dark section) ── */
.ref-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5px;
  background: rgba(250,247,242,0.06);
  border: 1px solid rgba(250,247,242,0.06);
}
.ref-card {
  display: block;
  background: var(--ink-soft);
  padding: 1.6rem 1.4rem;
  color: inherit;
  transition: background 0.3s;
  position: relative;
  overflow: hidden;
}
.ref-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 0; height: 2px;
  background: var(--accent3);
  transition: width 0.35s ease;
}
.ref-card:hover { background: #272420; }
.ref-card:hover::before { width: 100%; }
.ref-card--highlight { background: rgba(212,169,106,0.06); }
.ref-icon { font-size: 18px; margin-bottom: 0.6rem; }
.ref-name {
  font-family: 'Noto Serif TC', serif;
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(250,247,242,0.75);
  letter-spacing: 0.04em;
  margin-bottom: 3px;
}
.ref-url { font-size: 0.68rem; color: var(--accent3); letter-spacing: 0.06em; }

/* ── FOOTER ── */
footer {
  background: var(--ink);
  color: rgba(250,247,242,0.55);
  padding: 2.5rem 2rem;
  text-align: center;
  border-top: 1px solid rgba(250,247,242,0.06);
  font-size: 0.78rem;
  line-height: 2;
  letter-spacing: 0.04em;
}
footer .inner { max-width: 600px; margin: 0 auto; }
.footer-name {
  font-family: 'Noto Serif TC', serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--paper);
  letter-spacing: 0.12em;
  margin-bottom: 0.4rem;
}
.footer-role { color: var(--accent3); font-size: 0.72rem; letter-spacing: 0.18em; margin-bottom: 1rem; }
.footer-rule { width: 32px; height: 1px; background: rgba(250,247,242,0.2); margin: 0.8rem auto; }
.footer-link {
  color: rgba(250,247,242,0.75);
  border-bottom: 1px solid rgba(250,247,242,0.25);
  padding-bottom: 1px;
  font-family: 'Noto Serif TC', serif;
  letter-spacing: 0.08em;
  transition: color 0.2s, border-color 0.2s;
}
.footer-link:hover { color: var(--accent3); border-color: var(--accent3); }
.footer-copy { margin-top: 1.2rem; font-size: 0.68rem; color: rgba(250,247,242,0.3); letter-spacing: 0.06em; }

/* ── SEARCH ── */
.search-toggle {
  flex-shrink: 0;
  font-family: 'Noto Sans TC', sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--text-mid);
  background: none;
  border: none;
  border-left: 1px solid var(--paper-mid);
  padding: 0 1.2rem;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}
.search-toggle:hover,
.search-toggle[aria-expanded="true"] { color: var(--accent1); background: var(--paper-mid); }

/* 浮在內容上方（不佔版面，不會推動頁面） */
.search-bar {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  flex-direction: column;
  align-items: center;
  background: var(--paper);
  border-bottom: 1px solid var(--paper-mid);
  box-shadow: 0 10px 24px rgba(28,26,23,0.1);
  padding: 0.9rem 2rem;
}
.search-bar.open { display: flex; }
.search-form {
  width: 100%;
  max-width: 480px;
  display: flex;
  gap: 0.5rem;
}
.search-input {
  flex: 1;
  min-width: 0;
  font-family: 'Noto Sans TC', sans-serif;
  font-size: 0.85rem;
  color: var(--text-main);
  background: var(--paper-warm);
  border: 1px solid var(--paper-mid);
  border-radius: 4px;
  padding: 0.55rem 0.9rem;
}
.search-input:focus { outline: none; border-color: var(--accent2); }
.search-btn {
  font-family: 'Noto Sans TC', sans-serif;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--paper);
  background: var(--accent2);
  border: none;
  border-radius: 4px;
  padding: 0.55rem 1.1rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.2s;
}
.search-btn:hover { background: var(--accent1); }
.search-msg {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-soft);
  padding: 0.6rem 0 0;
  display: none;
}
.search-msg.show { display: block; }

@keyframes searchFlash {
  0%, 100% { background: var(--paper); }
  30% { background: rgba(196,149,106,0.16); }
}
@keyframes searchFlashWarm {
  0%, 100% { background: var(--paper-warm); }
  30% { background: rgba(196,149,106,0.22); }
}
@keyframes searchFlashInk {
  0%, 100% { background: var(--ink); }
  30% { background: rgba(212,169,106,0.18); }
}
.ws-section.search-hit { animation: searchFlash 1.6s ease; }
.ws-section.warm.search-hit { animation-name: searchFlashWarm; }
.ws-section.ink.search-hit { animation-name: searchFlashInk; }

/* ── FAQ ── */
.faq-list { border: 1px solid var(--paper-mid); }
.faq-item { border-bottom: 1px solid var(--paper-mid); background: var(--paper); }
.faq-item:last-child { border-bottom: none; }
.faq-item:nth-child(even) { background: var(--paper-warm); }
.faq-q {
  width: 100%;
  text-align: left;
  font-family: 'Noto Sans TC', sans-serif;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 1rem 1.4rem;
  cursor: pointer;
  background: none;
  border: none;
  letter-spacing: 0.04em;
  transition: color 0.2s;
}
.faq-q:hover { color: var(--accent2); }
.faq-arrow { font-size: 16px; color: var(--paper-mid); transition: transform 0.2s, color 0.2s; flex-shrink: 0; line-height: 1; }
.faq-item.open .faq-arrow { transform: rotate(45deg); color: var(--accent3); }
.faq-a { font-size: 0.8rem; color: var(--text-soft); line-height: 2; padding: 0 1.4rem 1rem; display: none; }
.faq-item.open .faq-a { display: block; }

/* ── OS TABS ── */
.os-tabs { display: flex; gap: 0.6rem; margin-bottom: 1.4rem; }
.os-tab {
  font-family: 'Noto Sans TC', sans-serif;
  font-size: 0.82rem;
  color: var(--text-mid);
  background: var(--paper-warm);
  border: 1px solid var(--paper-mid);
  border-radius: 999px;
  padding: 0.4rem 1.1rem;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.os-tab.active { background: var(--accent2); color: var(--paper); border-color: var(--accent2); }
.os-panel.os-hidden { display: none; }

/* ── RESPONSIVE ── */
@media (max-width: 680px) {
  .ws-section { padding: 3.5rem 1.5rem; }
  .ws-section.ink { padding: 3.5rem 1.5rem 4rem; }
  .hero { padding: 7rem 1.5rem 4rem; }
  .search-bar { padding: 0.8rem 1.5rem; }
  .search-toggle { padding: 0 1rem; }
  .search-toggle-text { display: none; }
  .os-tabs { flex-wrap: wrap; }
}

/* ── PRINT ── */
@media print {
  .nav { position: relative; }
  .page-tools { position: static; margin-top: 0; }
  .search-toggle { display: none; }
  .ws-section { padding: 2rem 0; break-inside: avoid; }
  .hero { padding: 2rem 0; }
  .code-block { font-size: 0.72rem; }
  .search-bar, .search-msg, .copy-btn { display: none; }
}