/* ============================================================
   Design System — Hardman Light
   Palette: warm off-white canvas · dark architectural type
   ============================================================ */

/* ---- Tokens ---- */
:root {
  --bg-base:       #F8F8F6;
  --bg-surface:    #FFFFFF;
  --border:        #E6E6E4;
  --text-primary:  #111111;
  --text-secondary:#5A5A58;
  --text-muted:    #A0A09E;
  --accent:        #3E5446;
  --accent-dim:    #2A3B30;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  --font-mono: 'Roboto Mono', 'Fira Code', 'Courier New', monospace;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur:  0.18s;
  --feed-gap: 60px;

  /* Panel widths */
  --sidebar-w: 22vw;
  --panel-w:   78vw;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background-color: var(--bg-base);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  opacity: 0;
  animation: body-reveal 0.5s var(--ease) 0.06s forwards;
}

@keyframes body-reveal { to { opacity: 1; } }

h1, h2, h3, h4, h5 {
  font-family: var(--font-sans);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  line-height: 1.2;
  color: var(--text-primary);
}

a { color: inherit; text-decoration: none; transition: color var(--dur); }

:focus-visible { outline: 1px solid var(--accent); outline-offset: 4px; border-radius: 2px; }

/* ---- Layout containers ---- */
.container-narrow { max-width: 1600px; margin: 0 auto; padding: 0 10%; }
.container-wide   { max-width: 1600px; margin: 0 auto; padding: 0 10%; }

/* ================================================================
   SITE HEADER
================================================================ */
.site-header {
  padding: 28px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-base);
  transition: box-shadow 0.28s var(--ease);
}

.site-header.scrolled { box-shadow: 0 1px 0 0 var(--border); }

/* Hidden when panel-open (sidebar + panel cover the viewport) */
body.panel-open .site-header { visibility: hidden; }

.wordmark {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-primary);
  transition: color var(--dur);
}
.wordmark:hover { color: var(--accent); }

/* ---- Primary nav (top header) ---- */
.site-nav {
  display: flex;
  gap: 32px;
  align-items: center;
}

.site-nav a,
.nav-filter {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  position: relative;
  transition: color var(--dur);
}

.site-nav a::after,
.nav-filter::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.24s var(--ease);
}

.nav-filter:hover { color: var(--text-secondary); }
.nav-filter.active { color: var(--text-primary); }
.nav-filter.active::after { width: 100%; }

/* ================================================================
   MAIN CONTENT
================================================================ */
.main-content {
  padding-top: 64px;
  padding-bottom: 0;
}

/* ================================================================
   ARTICLE FEED
================================================================ */
.feed { padding-top: 0; }

.feed-item {
  padding: var(--feed-gap) 0;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: opacity var(--dur);
}

.feed-item:first-child { padding-top: 44px; border-top: 1px solid var(--border); }
.feed-item:last-child  { border-bottom: none; }
.feed-item:hover       { opacity: 0.6; }
.feed-item.hidden      { display: none; }

.feed-meta { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }

.feed-tag {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.feed-date {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.feed-title {
  font-family: var(--font-sans);
  font-size: 21px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: 14px;
  transition: color var(--dur);
}
.feed-item:hover .feed-title { color: var(--accent); }

.feed-abstract {
  font-size: 16px;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  line-height: 1.65;
}

/* ================================================================
   ABOUT SECTION
================================================================ */
.about-section {
  padding-top: 44px;
}

.about-section.hidden { display: none; }

.about-grid { display: flex; flex-direction: column; gap: 0; }

.about-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  align-items: baseline;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.about-row:first-child { border-top: 1px solid var(--border); }

.about-label {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.about-text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.about-link {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  transition: color var(--dur);
}
.about-link:hover { color: var(--accent); }

/* ================================================================
   READER SIDEBAR — vertical nav, left 25vw, shown when panel open
================================================================ */
.reader-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-base);
  border-right: 1px solid var(--border);
  padding: 28px 32px 28px 28px;
  display: flex;
  flex-direction: column;
  gap: 48px;
  z-index: 201;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-12px);
  transition: opacity 0.28s var(--ease), transform 0.28s var(--ease);
}

body.panel-open .reader-sidebar {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

/* Hidden in fullpage mode */
body.reader-fullpage .reader-sidebar {
  opacity: 0;
  pointer-events: none;
}

.sidebar-wordmark { display: block; }

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.sidebar-filter {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  transition: color var(--dur);
}

.sidebar-filter::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.22s var(--ease);
}

.sidebar-filter:hover { color: var(--text-secondary); }
.sidebar-filter.active { color: var(--text-primary); }
.sidebar-filter.active::after { width: 100%; }

/* ================================================================
   READER PANEL — right 75vw
================================================================ */
.reader-panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: var(--panel-w);
  background: var(--bg-surface);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.30s var(--ease), width 0.30s var(--ease);
  z-index: 201;
}

.reader-panel.open { transform: translateX(0); }

/* Full-page: expand to 100vw */
body.reader-fullpage .reader-panel { width: 100vw; }

/* ---- Full-page header (horizontal, inside panel) ---- */
.reader-fp-header {
  display: none;
  padding: 28px 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

body.reader-fullpage .reader-fp-header { display: block; }

.fp-filter {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  transition: color var(--dur);
}

.fp-filter::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.22s var(--ease);
}

.fp-filter:hover { color: var(--text-secondary); }
.fp-filter.active { color: var(--text-primary); }
.fp-filter.active::after { width: 100%; }

/* ---- Toolbar ---- */
.reader-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 32px 56px 0;
}

.reader-close,
.reader-expand {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: color var(--dur);
}

.reader-close:hover,
.reader-expand:hover { color: var(--accent); }

/* ---- Article prose ---- */
.reader-inner {
  padding: 48px 5% 112px;
  max-width: 1200px;
}

/* In fullpage mode, center the content */
body.reader-fullpage .reader-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 6% 112px;
}

.prose h1 {
  font-size: 26px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.prose h2 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 52px 0 20px;
}

.prose h3 {
  font-size: 15px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  margin: 36px 0 14px;
}

.prose p {
  font-size: 17px;
  font-weight: 400;
  line-height: 1.78;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
  margin-bottom: 22px;
}

.prose strong { color: var(--text-primary); font-weight: 500; }
.prose em { font-style: italic; color: var(--text-muted); }

.prose ul, .prose ol { padding-left: 20px; margin-bottom: 22px; }

.prose li {
  font-size: 17px;
  line-height: 1.78;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.prose hr { border: none; border-top: 1px solid var(--border); margin: 52px 0; }

.prose blockquote {
  border-left: 1px solid var(--accent);
  padding-left: 28px;
  margin: 32px 0;
  color: var(--text-muted);
  font-style: italic;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: rgba(62, 84, 70, 0.08);
  padding: 2px 8px;
  border-radius: 2px;
  color: var(--accent);
  letter-spacing: 0;
}

.prose .meta-line {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 44px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.reader-loading {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ================================================================
   FOOTER
================================================================ */
.site-footer {
  padding: 52px 0 68px;
  border-top: 1px solid var(--border);
  margin-top: 96px;
}

.footer-line {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.footer-line a { color: var(--text-secondary); transition: color var(--dur); }
.footer-line a:hover { color: var(--accent); }

/* ================================================================
   NAV DROPDOWN — APPLICATION hover sub-menu
================================================================ */
.nav-dropdown-container {
  position: relative;
}

.nav-dropdown-trigger {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  cursor: pointer;
  position: relative;
  transition: color var(--dur);
  display: flex;
  align-items: center;
  gap: 5px;
}

.nav-dropdown-trigger::before {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.24s var(--ease);
}

.nav-dropdown-trigger:hover { color: var(--text-secondary); }
.nav-dropdown-trigger.active { color: var(--text-primary); }
.nav-dropdown-trigger.active::before { width: 100%; }

.nav-dropdown-trigger .chevron {
  font-size: 8px;
  opacity: 0.5;
  transition: transform 0.2s var(--ease);
}

.nav-dropdown-container:hover .chevron,
.nav-dropdown-container.open .chevron { transform: rotate(180deg); }

/* Invisible bridge fills the gap so hover isn't lost moving mouse down */
.nav-dropdown-container::after {
  content: '';
  position: absolute;
  top: 100%;
  left: -12px;
  right: -12px;
  height: 22px;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 18px);
  right: 0;
  min-width: 200px;
  background: var(--bg-base);
  border: 1px solid var(--border);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}

.nav-dropdown-container:hover .nav-dropdown,
.nav-dropdown-container.open .nav-dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: 14px 20px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  transition: color var(--dur), background var(--dur);
}

.nav-dropdown a:last-child { border-bottom: none; }
.nav-dropdown a:hover { color: var(--text-primary); background: rgba(62,84,70,0.04); }
.nav-dropdown a.active { color: var(--accent); }

/* ================================================================
   APPLICATION SUB-NAV — sticky tab bar on lab pages
================================================================ */
.app-subnav {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 69px;
  background: var(--bg-base);
  z-index: 99;
}

.app-subnav-inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 10%;
  display: flex;
  gap: 0;
  overflow-x: auto;
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.app-subnav-inner::-webkit-scrollbar { display: none; }

.app-subnav-link {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 18px 0;
  margin-right: 32px;
  position: relative;
  transition: color var(--dur);
}

.app-subnav-link::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.24s var(--ease);
}

.app-subnav-link:hover { color: var(--text-secondary); }
.app-subnav-link.active { color: var(--text-primary); }
.app-subnav-link.active::after { width: 100%; }

/* ================================================================
   LAB PAGE — shared components
================================================================ */
.lab-intro {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}

.lab-tag {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.lab-title {
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.lab-desc {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 640px;
}

/* Company cards grid */
.lab-company-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.lab-company-card {
  border: 1px solid var(--border);
  padding: 28px;
  background: var(--bg-surface);
  transition: border-color var(--dur);
}

.lab-company-card:hover { border-color: var(--accent); }

.lab-ticker {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.lab-company-name {
  font-size: 20px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.lab-company-story {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.lab-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  padding: 4px 12px;
  margin-bottom: 20px;
}

.lab-pill.alert {
  color: #92400E;
  background: rgba(245,158,11,0.10);
  border: 1px solid rgba(245,158,11,0.28);
}

.lab-pill.ok {
  color: var(--accent);
  background: rgba(62,84,70,0.07);
  border: 1px solid rgba(62,84,70,0.22);
}

.lab-card-stats {
  display: flex;
  gap: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.lab-stat { flex: 1; }

.lab-stat-label {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 3px;
}

.lab-stat-value {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

/* KPI row */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.kpi-card {
  border-left: 2px solid var(--accent);
  padding: 20px 24px;
  background: var(--bg-surface);
}

.kpi-label {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.kpi-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.kpi-delta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  font-family: var(--font-mono);
}

/* Chart grid */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 40px;
}

.chart-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 28px;
}

.chart-card-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* Alert banner */
.lab-alert-banner {
  padding: 16px 20px;
  border-left: 2px solid;
  margin-bottom: 16px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-secondary);
}

.lab-alert-banner.warning { border-color: #F59E0B; background: rgba(245,158,11,0.06); }
.lab-alert-banner.ok      { border-color: var(--accent); background: rgba(62,84,70,0.05); }

/* Data table */
.lab-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.lab-table th {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.lab-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 12px;
}

.lab-table tr:last-child td { border-bottom: none; }
.lab-table tr.flagged td { background: rgba(245,158,11,0.05); }

/* Signal compare (before / after) */
.signal-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

.signal-pane {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 28px;
}

.signal-pane-year {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.signal-pane-text {
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-secondary);
}

/* Company selector tabs */
.company-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 36px;
}

.company-tab {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 14px 0;
  margin-right: 28px;
  cursor: pointer;
  background: none;
  border: none;
  position: relative;
  transition: color var(--dur);
}

.company-tab::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.22s var(--ease);
}

.company-tab:hover { color: var(--text-secondary); }
.company-tab.active { color: var(--text-primary); }
.company-tab.active::after { width: 100%; }

/* Methodology list */
.method-list { margin-top: 40px; }

.method-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
  align-items: start;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.method-item:first-child { border-top: 1px solid var(--border); }

.method-signal {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  padding-top: 2px;
}

.method-desc {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* Section heading used inside lab pages */
.lab-section-heading {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 24px;
  margin-top: 52px;
}

.lab-section-heading:first-child { margin-top: 0; }

/* ================================================================
   RESPONSIVE
================================================================ */
@media (max-width: 768px) {
  :root {
    --sidebar-w: 0px;
    --panel-w: 100vw;
    --feed-gap: 44px;
  }

  body.panel-open .reader-sidebar { display: none; }

  .main-content { padding-top: 48px; }

  .reader-toolbar { padding: 24px 24px 0; }
  .reader-inner   { padding: 32px 24px 80px; }

  .site-nav { gap: 20px; }
  .container-narrow { padding: 0 5%; }
  .container-wide   { padding: 0 5%; }

  .about-row { grid-template-columns: 1fr; gap: 8px; }
  .lab-company-grid { grid-template-columns: 1fr; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .chart-grid { grid-template-columns: 1fr; }
  .signal-compare { grid-template-columns: 1fr; }
  .method-item { grid-template-columns: 1fr; gap: 8px; }
}