/* ═══════════════════════════════════════════════════════
   NAV — Navigation, TOC, progress indicators
   ═══════════════════════════════════════════════════════ */

/* ── Sticky Nav ── */
nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(250,250,248,.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226,224,218,.6);
  padding: .5rem clamp(1.25rem, 4vw, 2.5rem);
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: box-shadow .3s;
  flex-wrap: wrap;
  gap: .3rem;
}
nav.scrolled {
  box-shadow: 0 4px 20px rgba(0,0,0,.06);
}

/* ── Nav Brand ── */
.nav-brand { display: flex; align-items: center; gap: .6rem; }
a.nav-brand, a.nav-brand:hover { text-decoration: none; color: inherit; }
a.nav-brand:hover .nav-icon { transform: scale(1.08); box-shadow: 0 2px 8px rgba(26,107,80,.3); }
a.nav-brand:hover .nav-title { color: var(--primary); }
.nav-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: linear-gradient(135deg, #0F766E, #1D4ED8);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s;
  box-shadow: 0 2px 8px rgba(15,118,110,.25);
}
.nav-icon svg { width: 16px; height: 16px; }
.nav-title {
  font-family: var(--display);
  font-weight: 600;
  font-size: .95rem;
  color: var(--text);
  transition: color .2s;
}
.nav-title-sub {
  font-family: var(--mono);
  font-size: .45rem;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-3);
  display: block;
  line-height: 1;
  margin-top: 1px;
}

/* ── Nav Links ── */
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: .2rem;
}
.nav-links a,
.nav-links a:hover {
  text-decoration: none;
}
.nav-links a {
  font-size: .72rem;
  font-weight: 500;
  color: var(--text-2);
  padding: .35rem .55rem;
  border-radius: 6px;
  transition: all .15s cubic-bezier(.16,1,.3,1);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.nav-links a:hover {
  color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-1px);
}
.nav-links a:active {
  transform: translateY(0) scale(.97);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: all .2s;
  transform: translateX(-50%);
}
.nav-links a:hover::after { width: 70%; }

/* ── Nav Active ── */
.nav-links a.nav-active {
  color: var(--primary);
  background: rgba(26,107,80,.06);
  font-weight: 600;
  border-radius: 6px;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
  text-decoration-color: var(--primary);
}

/* ── Nav Barrier ── */
.nav-links a.nav-barrier {
  color: var(--red);
  border: 1px solid var(--red-bd);
  background: var(--red-light);
}
.nav-links a.nav-barrier:hover {
  background: var(--red);
  color: #fff;
}
.nav-links a.nav-barrier.nav-active {
  background: var(--red);
  color: #fff;
  text-decoration-color: #fff;
  border-color: var(--red);
}
.nav-links a.nav-barrier.nav-active .nav-num {
  background: #fff;
  color: var(--red);
  border-color: #fff;
}

/* ── 7-Color Nav System ── */
.nv {
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: all .2s cubic-bezier(.16,1,.3,1);
  opacity: .88;
}
.nv:hover {
  opacity: 1;
  border-color: currentColor;
  transform: translateY(-1px);
}
/* 7-color nav system — tinted resting states, full-color on hover */
.nv-blue   { opacity: 1; background: rgba(59,130,246,.08); color: var(--blue);  border-color: rgba(59,130,246,.18); }
.nv-green  { opacity: 1; background: rgba(15,118,110,.08); color: var(--primary); border-color: rgba(15,118,110,.18); }
.nv-amber  { opacity: 1; background: rgba(217,119,6,.08);  color: var(--amber); border-color: rgba(217,119,6,.18); }
.nv-teal   { opacity: 1; background: rgba(20,184,166,.08); color: var(--teal);  border-color: rgba(20,184,166,.18); }
.nv-purple { opacity: 1; background: rgba(109,40,217,.08); color: var(--purple); border-color: rgba(109,40,217,.18); }
.nv-rose   { opacity: 1; background: rgba(190,24,93,.08);  color: #be185d; border-color: rgba(190,24,93,.18); }
.nv-indigo { opacity: 1; background: rgba(67,56,202,.08);  color: #4338ca; border-color: rgba(67,56,202,.18); }
.nv-sky    { opacity: 1; background: rgba(2,132,199,.08);  color: #0284c7; border-color: rgba(2,132,199,.18); }
.nv-orange { opacity: 1; background: rgba(194,65,12,.08);  color: #c2410c; border-color: rgba(194,65,12,.18); }

.nv-blue:hover   { background: var(--blue);  color: #fff; border-color: var(--blue); }
.nv-green:hover  { background: var(--primary); color: #fff; border-color: var(--primary); }
.nv-amber:hover  { background: var(--amber); color: #fff; border-color: var(--amber); }
.nv-teal:hover   { background: var(--teal);  color: #fff; border-color: var(--teal); }
.nv-purple:hover { background: var(--purple); color: #fff; border-color: var(--purple); }
.nv-rose:hover   { background: #be185d; color: #fff; border-color: #be185d; }
.nv-indigo:hover { background: #4338ca; color: #fff; border-color: #4338ca; }
.nv-sky:hover    { background: #0284c7; color: #fff; border-color: #0284c7; }
.nv-orange:hover { background: #c2410c; color: #fff; border-color: #c2410c; }

/* Active nav link restores color */
.nav-links a.nv.nav-active {
  opacity: 1;
  background: var(--primary-light);
  border-color: var(--primary-bd);
  color: var(--primary);
}

/* ── Nav Number Badges ── */
.nav-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--bg-3);
  font-family: var(--mono);
  font-size: .45rem;
  font-weight: 700;
  color: var(--text-3);
  margin-right: .2rem;
  flex-shrink: 0;
  line-height: 1;
}
.nav-active .nav-num { background: var(--primary); color: #fff; }
.nv .nav-num { background: transparent; border: 1px solid currentColor; color: inherit; }
.nav-barrier .nav-num { background: transparent; border: 1px solid var(--red); color: var(--red); }

/* ── Nav Visited Dots ── */
.nav-links a.nav-visited::after {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
  margin-left: 3px;
  vertical-align: middle;
  opacity: .6;
}

/* ── TOC Button ── */
.toc-btn {
  padding: .45rem .85rem;
  border-radius: 8px;
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 700;
  border: none;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  min-height: 32px;
  letter-spacing: .03em;
  box-shadow: 0 2px 8px rgba(26,107,80,.25);
}
.toc-btn:hover { box-shadow: 0 4px 12px rgba(26,107,80,.35); transform: translateY(-1px); }
.toc-btn.toc-open { background: var(--text); box-shadow: 0 2px 8px rgba(0,0,0,.2); }

/* ── TOC Panel ── */
.toc-panel {
  position: fixed;
  top: 57px;
  left: 0;
  width: min(440px, 92vw);
  max-height: calc(100vh - 57px);
  background: var(--bg);
  border-right: 1px solid var(--border);
  box-shadow: 8px 0 40px rgba(0,0,0,.1), 2px 0 8px rgba(0,0,0,.04);
  z-index: 199;
  transform: translateX(-100%);
  transition: transform .3s cubic-bezier(.16,1,.3,1);
  overflow-y: auto;
  padding: 1rem 0;
}
.toc-panel.toc-visible { transform: translateX(0); }
.toc-header { padding: 0 1.25rem .75rem; border-bottom: 1px solid var(--border); margin-bottom: .5rem; }
.toc-title { font-family: var(--display); font-size: 1.1rem; font-weight: 700; color: var(--text); }
.toc-subtitle { font-size: .7rem; color: var(--text-3); margin-top: .15rem; }
.toc-group { padding: .25rem 0; }
.toc-group-label { padding: .3rem 1.25rem; font-family: var(--mono); font-size: .5rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--text-3); }
.toc-item {
  display: flex;
  align-items: flex-start;
  gap: .65rem;
  padding: .5rem 1.25rem;
  cursor: pointer;
  transition: background .12s;
  border-left: 3px solid transparent;
}
.toc-item:hover { background: var(--surface-2); border-left-color: var(--primary); }
.toc-item:active { background: var(--primary-light); }
.toc-item.toc-current { background: var(--primary-light); border-left: 3px solid var(--primary); }
.toc-item.toc-current .toc-num { transform: scale(1.1); box-shadow: 0 0 0 3px rgba(26,107,80,.15); background: var(--primary); color: #fff; border-color: var(--primary); }
.toc-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: .55rem;
  font-weight: 700;
  color: var(--text-3);
  flex-shrink: 0;
  transition: all .15s;
}
.toc-item:hover .toc-num { background: var(--primary); color: #fff; border-color: var(--primary); }
.toc-text { flex: 1; min-width: 0; }
.toc-item-title { font-size: .8rem; font-weight: 600; color: var(--text); line-height: 1.3; }
.toc-item-desc { font-size: .68rem; color: var(--text-3); line-height: 1.5; margin-top: .1rem; }
.toc-item-tag { font-family: var(--mono); font-size: .48rem; padding: .1rem .3rem; border-radius: 3px; flex-shrink: 0; align-self: center; }
.tag-interactive { background: var(--primary-light); color: var(--primary); border: 1px solid var(--primary-bd); }
.tag-data { background: var(--blue-light); color: var(--blue); border: 1px solid var(--blue-bd); }
.tag-analysis { background: var(--purple-light); color: var(--purple); border: 1px solid var(--purple-bd); }
.tag-vision { background: var(--teal-light); color: var(--teal); border: 1px solid var(--teal-bd); }
.tag-story { background: var(--amber-light); color: var(--amber); border: 1px solid var(--amber-bd); }

/* TOC color-coded numbers */
.tc-blue .toc-num { background: var(--blue); color: #fff; border-color: var(--blue); }
.tc-green .toc-num { background: var(--primary); color: #fff; border-color: var(--primary); }
.tc-amber .toc-num { background: var(--amber); color: #fff; border-color: var(--amber); }
.tc-teal .toc-num { background: var(--teal); color: #fff; border-color: var(--teal); }
.tc-purple .toc-num { background: var(--purple); color: #fff; border-color: var(--purple); }
.tc-rose .toc-num { background: #be185d; color: #fff; border-color: #be185d; }
.tc-indigo .toc-num { background: #4338ca; color: #fff; border-color: #4338ca; }
.tc-sky .toc-num { background: #0284c7; color: #fff; border-color: #0284c7; }
.tc-orange .toc-num { background: #c2410c; color: #fff; border-color: #c2410c; }
.tc-red .toc-num { background: var(--red); color: #fff; border-color: var(--red); }

/* ── Progress Dots ── */
.progress-dots {
  position: fixed;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  z-index: 150;
  opacity: .4;
  transition: opacity .2s;
}
.progress-dots:hover { opacity: .9; }
.progress-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--border-2);
  border: 1.5px solid var(--text-3);
  transition: all .3s cubic-bezier(.16,1,.3,1);
  cursor: pointer;
}
.progress-dot:hover { background: var(--text-2); border-color: var(--text-2); transform: scale(1.3); }
.pd-origin { margin-top: 4px; border-color: var(--amber); background: transparent; }
.pd-origin.pd-active { background: var(--amber); border-color: var(--amber); box-shadow: 0 0 0 3px rgba(161,98,7,.2); }
.pd-origin.pd-active::after { border-color: var(--amber); }
.progress-dot.pd-active {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,107,80,.2);
  transform: scale(1.25);
  position: relative;
}
.progress-dot.pd-active::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1.5px solid var(--primary);
  pointer-events: none;
}

/* ── Back to Top ── */
.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #0D9488);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(26,107,80,.25);
  z-index: 150;
  opacity: 0;
  transform: translateY(10px);
  transition: all .3s cubic-bezier(.16,1,.3,1);
  pointer-events: none;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 28px rgba(26,107,80,.35); }

/* ── Skip Link ── */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--primary);
  color: #fff;
  padding: .5rem 1rem;
  z-index: 9999;
  font-size: .8rem;
  transition: top .2s;
}
.skip-link:focus { top: 0; }

/* ── Scroll Progress Bar ── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--teal), var(--blue));
  z-index: 9999;
  transition: width .1s linear;
  width: 0;
  border-radius: 0 3px 3px 0;
  box-shadow: 0 0 12px rgba(26,107,80,.25), 0 0 4px rgba(26,107,80,.15);
}

/* ── Scroll Hint ── */
.scroll-hint {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: .6rem;
  color: var(--text-3);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .25rem;
  z-index: 50;
  transition: opacity .5s;
  pointer-events: none;
}
.scroll-hint .hint-arrow { font-size: 1rem; line-height: 1; }
.scroll-hint.hint-gone { opacity: 0; }

/* ── A11y Toggle ── */
.a11y-toggle {
  display: flex;
  align-items: center;
  gap: .4rem;
  cursor: pointer;
  padding: .25rem .55rem;
  border-radius: 6px;
  border: 1.5px solid var(--border);
  background: var(--surface);
  transition: all .15s;
  flex-shrink: 0;
}
.a11y-toggle:hover { border-color: var(--primary); background: var(--primary-light); }
.a11y-toggle.a11y-on { border-color: var(--primary); background: var(--primary); }
.a11y-label { font-family: var(--mono); font-size: .55rem; font-weight: 600; letter-spacing: .04em; color: var(--text-2); white-space: nowrap; user-select: none; }
.a11y-toggle.a11y-on .a11y-label { color: #fff; }
.a11y-switch { width: 28px; height: 16px; border-radius: 8px; background: var(--border-2); position: relative; transition: background .2s; flex-shrink: 0; }
.a11y-switch::after { content: ''; position: absolute; top: 2px; left: 2px; width: 12px; height: 12px; border-radius: 50%; background: #fff; transition: transform .2s cubic-bezier(.16,1,.3,1); box-shadow: 0 1px 3px rgba(0,0,0,.2); }
.a11y-toggle.a11y-on .a11y-switch { background: var(--primary); }
.a11y-toggle.a11y-on .a11y-switch::after { transform: translateX(12px); }
.a11y-icon { font-size: .8rem; line-height: 1; }

.theme-toggle-btn {
  display: flex;
  align-items: center;
  gap: .4rem;
  cursor: pointer;
  padding: .32rem .65rem;
  border-radius: 6px;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  transition: all .15s;
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: .55rem;
  font-weight: 600;
  letter-spacing: .04em;
}
.theme-toggle-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.theme-icon { font-size: .85rem; line-height: 1; }
.theme-label { white-space: nowrap; }

html[data-theme="dark"] .nav-brand .nav-icon {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
}
html[data-theme="dark"] #nav {
  background: rgba(22, 19, 16, .88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
html[data-theme="dark"] #nav.scrolled {
  background: rgba(22, 19, 16, .95);
}

.nav-count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 .4rem;
  margin-left: .35rem;
  border-radius: 100px;
  background: var(--blue);
  color: #fff;
  font-family: var(--mono);
  font-size: .6rem;
  font-weight: 700;
  line-height: 1;
  vertical-align: middle;
}
.nav-count-badge.nav-badge-aging { background: var(--amber); }
.nav-count-badge.nav-badge-urgent {
  background: var(--red);
  animation: navBadgePulse 2s ease-in-out infinite;
}
@keyframes navBadgePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(185, 28, 28, .4); }
  50% { box-shadow: 0 0 0 4px rgba(185, 28, 28, 0); }
}

.role-picker-wrap {
  position: relative;
  flex-shrink: 0;
}
.role-toggle {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .3rem .55rem .3rem .35rem;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  border-radius: 6px;
  cursor: pointer;
  transition: all .15s;
  font-family: var(--mono);
  font-size: .58rem;
  font-weight: 600;
}
.role-toggle:hover { border-color: var(--primary); background: var(--primary-light); }
.role-icon {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: .72rem;
}
.role-label { color: var(--text); font-weight: 700; letter-spacing: .03em; }
.role-caret { color: var(--text-3); font-size: .6rem; }

.role-menu {
  display: none;
  position: absolute;
  top: calc(100% + .35rem);
  right: 0;
  min-width: 320px;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--r);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0,0,0,.02);
  z-index: 9999;
  padding: .35rem;
  flex-direction: column;
  gap: .15rem;
}
.role-menu.role-menu-open { display: flex; }

.role-option {
  display: grid;
  grid-template-columns: 32px 1fr auto;
  gap: .65rem;
  align-items: center;
  padding: .7rem .8rem;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  transition: background .15s;
}
.role-option:hover { background: var(--bg-2); }
.role-option-active { background: var(--primary-light); }
.role-option-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}
.role-option-main {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  min-width: 0;
}
.role-option-label {
  font-family: var(--body);
  font-size: .85rem;
  font-weight: 600;
  color: var(--text);
}
.role-option-desc {
  font-family: var(--mono);
  font-size: .62rem;
  color: var(--text-3);
  line-height: 1.4;
}
.role-option-check {
  font-size: 1rem;
  color: var(--primary);
  font-weight: 700;
}

.role-share {
  margin-top: .35rem;
  padding: .85rem 1rem;
  border-top: 1px dashed var(--border);
  background: var(--surface-2);
  border-radius: 0 0 var(--r) var(--r);
}
.role-share-label {
  font-family: var(--mono);
  font-size: .6rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-3);
  font-weight: 700;
  margin-bottom: .25rem;
}
.role-share-desc {
  font-size: .72rem;
  color: var(--text-2);
  margin-bottom: .5rem;
  line-height: 1.45;
}

@media (max-width: 640px) {
  .role-label, .role-caret { display: none; }
  .role-toggle { padding: .3rem; }
  .role-menu { right: -8px; min-width: 280px; }
}

.autosave-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--border-2);
  flex-shrink: 0;
  transition: background .15s, box-shadow .25s, transform .25s;
  cursor: help;
}
.autosave-dot.autosave-pulse {
  background: var(--primary);
  box-shadow: 0 0 0 3px rgba(15,118,110,.25);
  transform: scale(1.25);
}
@media (prefers-reduced-motion: reduce) {
  .autosave-dot.autosave-pulse {
    transform: none;
    box-shadow: 0 0 0 3px rgba(15,118,110,.35);
  }
}