/* ── Bitcoin Sahi — Design System ── */
:root {
  --bg: #F5F2ED;
  --bg-card: #FFFFFF;
  --bg-elevated: #FAFAF8;
  --text: #1A1A1A;
  --text-secondary: #6B6B6B;
  --text-muted: #9E9E9E;
  --orange: #F7931A;
  --orange-light: #FEF3E2;
  --orange-dim: #F7931A15;
  --green: #3FB950;
  --green-light: #E6F7E9;
  --red: #F85149;
  --red-light: #FDECEC;
  --blue: #58A6FF;
  --blue-light: #EDF4FF;
  --yellow: #D29922;
  --yellow-light: #FCF3E3;
  --purple: #BC8CFF;
  --purple-light: #F3ECFF;
  --border: #E8E5E0;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --radius-full: 100px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  --ease: 0.2s ease;
}

/* ── Reset ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--orange);
  text-decoration: none;
  transition: color var(--ease);
}

a:hover {
  text-decoration: underline;
}

img, canvas, svg {
  max-width: 100%;
  display: block;
}

/* ── Typography ── */
::selection {
  background: var(--orange);
  color: #fff;
}

/* ── Navigation ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #F5F2EDF0;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 20px 36px;
  font-size: 17px;
}

nav .brand {
  font-weight: 800;
  font-size: 26px;
  letter-spacing: -0.5px;
  white-space: nowrap;
  flex-shrink: 0;
  color: var(--text);
  text-decoration: none;
}

nav .brand:hover {
  text-decoration: none;
}

nav .brand span {
  color: var(--orange);
}

nav .spacer {
  flex: 1;
}

nav .nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 17px;
  padding: 8px 0;
  transition: color var(--ease);
}

nav .nav-link:hover {
  color: var(--text);
  text-decoration: none;
}

nav .nav-link.danger {
  color: var(--red);
}

nav .cta {
  background: var(--orange);
  color: #000;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 16px;
  transition: transform var(--ease), box-shadow var(--ease);
  flex-shrink: 0;
  text-decoration: none;
  display: inline-block;
}

nav .cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(247, 147, 26, 0.25);
  text-decoration: none;
}

/* ── Dropdown ── */
nav .dropdown {
  position: relative;
  display: inline-block;
}

nav .dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 12px;
}

nav .dropbtn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 15px;
  cursor: pointer;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--ease);
  font-weight: 600;
  font-family: var(--font-sans);
}

nav .dropbtn:hover {
  border-color: var(--orange);
  color: var(--text);
}

nav .dd-arrow {
  font-size: 12px;
  opacity: 0.6;
}

nav .dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  z-index: 200;
  margin-top: 0;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

nav .dropdown-content .dd-title {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  padding: 4px 14px 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

nav .dropdown-content a {
  display: block;
  padding: 10px 16px;
  border-radius: var(--radius-xs);
  font-size: 15px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: background var(--ease), color var(--ease);
}

nav .dropdown-content a:hover {
  background: var(--orange);
  color: #000;
  text-decoration: none;
}

nav .dropdown:hover .dropdown-content,
nav .dropdown:focus-within .dropdown-content {
  display: block;
}

/* ── Layout ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.full-width {
  width: 100%;
}

.section {
  padding: 40px 0;
}

.section-header {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--orange);
  margin-bottom: 8px;
}

.section-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.6;
  margin-bottom: 24px;
}

.page-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.page-sub {
  color: var(--text-secondary);
  font-size: 17px;
  margin-bottom: 24px;
  max-width: 700px;
  line-height: 1.6;
}

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 80px 24px 50px;
  background: radial-gradient(ellipse at 50% 0%, rgba(247, 147, 26, 0.07) 0%, transparent 60%);
}

.hero .badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--orange);
  border: 1px solid var(--orange);
  border-radius: 20px;
  padding: 5px 15px;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.hero .badge.danger {
  color: var(--red);
  border-color: var(--red);
}

.hero h1 {
  font-size: clamp(36px, 5.5vw, 58px);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.25;
  margin-bottom: 16px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--orange), #FFB347);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h1 span.danger {
  background: linear-gradient(135deg, var(--red), #FFB347);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 860px;
  margin: 0 auto 30px;
  line-height: 1.7;
}

.hero .actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 15px;
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--orange);
  color: #000;
}

.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(247, 147, 26, 0.25);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--orange);
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--red);
  color: #000;
}

.btn-danger:hover {
  box-shadow: 0 4px 20px rgba(248, 81, 73, 0.25);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-ghost {
  background: none;
  color: var(--text-secondary);
  border: 1px solid transparent;
}

.btn-ghost:hover {
  border-color: var(--border);
  color: var(--text);
}

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
  transition: border-color var(--ease);
}

.card:hover {
  border-color: var(--orange);
}

.card-flat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
}

.card-elevated {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
}

/* ── Stat Cards ── */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  transition: border-color var(--ease);
}

.stat-card:hover {
  border-color: var(--orange);
}

.stat-card .lbl {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-card .value {
  font-size: 20px;
  font-weight: 700;
  margin-top: 3px;
}

/* ── Stats Bar ── */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: -20px auto 60px;
  max-width: 900px;
}

.stat {
  background: var(--bg-card);
  padding: 24px;
  text-align: center;
}

.stat .num {
  font-size: 28px;
  font-weight: 800;
}

.stat .num.orange { color: var(--orange); }
.stat .num.green { color: var(--green); }
.stat .num.blue { color: var(--blue); }
.stat .num.purple { color: var(--purple); }
.stat .num.red { color: var(--red); }

.stat .lbl {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ── Persona Cards ── */
.persona-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 20px 0;
}

.persona-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
}

.persona-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--orange);
  opacity: 0;
  transition: opacity 0.3s;
}

.persona-card:hover {
  border-color: var(--orange);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(247, 147, 26, 0.08);
  text-decoration: none;
}

.persona-card:hover::before {
  opacity: 1;
}

.persona-card .emoji {
  font-size: 36px;
  line-height: 1;
  margin-bottom: 6px;
}

.persona-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}

.persona-card .question {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0 0 8px;
}

.persona-card .card-cta {
  font-size: 12px;
  font-weight: 600;
  color: var(--orange);
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--ease);
}

.persona-card:hover .card-cta {
  gap: 8px;
}

.persona-card .card-cta.danger {
  color: var(--red);
}

/* ── Thesis ── */
.thesis {
  padding: 60px 0 40px;
}

.thesis p.lede {
  font-size: 22px;
  line-height: 1.7;
  max-width: 860px;
  margin: 0 auto 40px;
  text-align: center;
  color: var(--text);
}

.thesis-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.thesis-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
  transition: border-color 0.3s;
}

.thesis-card:hover {
  border-color: var(--orange);
}

.thesis-card .tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-xs);
  background: var(--orange-dim);
  color: var(--orange);
}

.thesis-card .tag.green {
  background: var(--green-light);
  color: var(--green);
}

.thesis-card .tag.red {
  background: var(--red-light);
  color: var(--red);
}

.thesis-card .tag.blue {
  background: var(--blue-light);
  color: var(--blue);
}

.thesis-card .tag.yellow {
  background: var(--yellow-light);
  color: var(--yellow);
}

.thesis-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.thesis-card p {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── Research Links ── */
.research {
  padding: 30px 0 60px;
  text-align: center;
}

.research-links {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.research-links a {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 28px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: border-color var(--ease), transform var(--ease);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.research-links a:hover {
  border-color: var(--orange);
  transform: translateY(-2px);
  text-decoration: none;
}

/* ── Visualisation Wrappers ── */
.viz-wrap {
  max-width: 900px;
  margin: 0 auto 28px;
  position: relative;
}

.viz-wrap canvas {
  width: 100%;
  height: 200px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: block;
}

.viz-wrap .viz-overlay {
  position: absolute;
  bottom: 10px;
  right: 14px;
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  text-transform: uppercase;
  pointer-events: none;
  opacity: 0.6;
}

.canvas-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
  margin-bottom: 16px;
}

.canvas-wrap canvas {
  width: 100%;
  height: 200px;
  border-radius: 10px;
  display: block;
}

/* ── Grids ── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

/* ── Tabs ── */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 4px;
  border: 1px solid var(--border);
}

.tab {
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--ease);
  border: none;
  background: none;
  font-family: var(--font-sans);
}

.tab:hover {
  color: var(--text);
  background: rgba(0, 0, 0, 0.04);
}

.tab.active {
  background: var(--orange);
  color: #000;
}

.persona-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.persona-tab {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--ease);
  font-family: var(--font-sans);
}

.persona-tab:hover {
  border-color: var(--orange);
  color: var(--text);
}

.persona-tab.active {
  background: var(--orange);
  color: #000;
  border-color: var(--orange);
}

/* ── Dashboard Workspace ── */
.workspace {
  display: none;
}

.workspace.active {
  display: block;
}

.decision-content {
  display: none;
}

.decision-content.active {
  display: block;
}

.ws-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.ws-full {
  grid-column: 1 / -1;
}

.ws-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color 0.3s;
  position: relative;
}

.ws-card:hover {
  border-color: var(--orange);
}

.ws-card .icon {
  font-size: 28px;
  position: absolute;
  top: 18px;
  right: 18px;
  opacity: 0.12;
}

.ws-card .label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 700;
  margin-bottom: 2px;
}

.ws-card .label.send { color: var(--green); }
.ws-card .label.ln { color: var(--purple); }
.ws-card .label.ex { color: var(--blue); }
.ws-card .label.node { color: var(--orange); }
.ws-card .label.miner { color: var(--red); }
.ws-card .label.research { color: var(--yellow); }
.ws-card .label.dev { color: var(--blue); }

.ws-card .q {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  line-height: 1.5;
}

.ws-card .a {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 6px;
  line-height: 1.3;
}

.ws-card .a .good { color: var(--green); }
.ws-card .a .warn { color: var(--yellow); }
.ws-card .a .bad { color: var(--red); }

.ws-card .d {
  font-size: 15px;
  color: var(--text-secondary);
  margin-top: 6px;
  line-height: 1.6;
}

.ws-card .badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-xs);
  margin-top: 10px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.ws-card .action {
  display: inline-block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--orange);
  font-weight: 600;
  text-decoration: none;
}

.ws-card .action:hover {
  text-decoration: underline;
}

.ws-section-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  margin: 20px 0 10px;
}

/* ── Fee Pills ── */
.fee-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 20px;
}

.fee-pill.green {
  background: var(--green);
  color: #000;
}

.fee-pill.yellow {
  background: var(--yellow);
  color: #000;
}

.fee-pill.red {
  background: var(--red);
  color: #000;
}

.fee-pill.orange {
  background: var(--orange);
  color: #000;
}

/* ── Badges ── */
.badge-rec {
  background: var(--green);
  color: #000;
}

.badge-wait {
  background: var(--yellow);
  color: #000;
}

.badge-ok {
  background: var(--blue);
  color: #000;
}

.badge-info {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.badge-danger {
  background: var(--red);
  color: #000;
}

/* ── Decision Cards ── */
.decision-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 12px;
}

.decision-card .dc-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  font-weight: 600;
}

.decision-card .dc-value {
  font-size: 28px;
  font-weight: 800;
  margin: 4px 0;
}

.decision-card .dc-sub {
  font-size: 12px;
  color: var(--text-muted);
}

/* ── Summary Bar ── */
.summary-bar {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.summary-bar .row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.summary-bar .time {
  font-size: 12px;
  color: var(--text-muted);
}

/* ── Live Indicator ── */
.live-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  display: inline-block;
  animation: breathe 2s infinite;
}

@keyframes breathe {
  0% { opacity: 1; box-shadow: 0 0 0 0 rgba(63, 185, 80, 0.4); }
  50% { opacity: 0.6; }
  100% { opacity: 1; box-shadow: 0 0 0 6px rgba(63, 185, 80, 0); }
}

.live-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  color: var(--text-muted);
}

.live-pill .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
  display: inline-block;
  animation: livePulse 2s infinite;
}

@keyframes livePulse {
  0% { opacity: 1; box-shadow: 0 0 0 0 rgba(63, 185, 80, 0.4); }
  50% { opacity: 0.6; }
  100% { opacity: 1; box-shadow: 0 0 0 4px rgba(63, 185, 80, 0); }
}

/* ── Live Ticker ── */
.live-ticker {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  font-size: 13px;
  color: var(--text-muted);
  overflow: hidden;
  white-space: nowrap;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.live-ticker .ticker-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.live-ticker .ticker-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  display: inline-block;
  animation: tickerPulse 1.5s ease-in-out infinite;
}

.live-ticker .ticker-dot.green { background: var(--green); }
.live-ticker .ticker-dot.orange { background: var(--orange); }
.live-ticker .ticker-dot.blue { background: var(--blue); }
.live-ticker .ticker-dot.red { background: var(--red); }

@keyframes tickerPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ── Tools List ── */
.tools-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.tools-list a {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 8px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: border-color var(--ease), color var(--ease);
}

.tools-list a:hover {
  border-color: var(--orange);
  color: var(--text);
  text-decoration: none;
}

/* ── Key-Value Table ── */
.kv-table {
  width: 100%;
  font-size: 15px;
  border-collapse: collapse;
}

.kv-table tr td {
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.kv-table tr td:first-child {
  color: var(--text-secondary);
  width: 40%;
}

.kv-table tr td:last-child {
  font-weight: 600;
  text-align: right;
}

/* ── Endpoint Cards ── */
.endpoint-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 8px;
}

.endpoint-card .method {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  margin-right: 8px;
}

.endpoint-card .method.get { background: var(--blue); color: #000; }
.endpoint-card .method.post { background: var(--green); color: #000; }
.endpoint-card .method.put { background: var(--orange); color: #000; }
.endpoint-card .method.delete { background: var(--red); color: #000; }

.endpoint-card .url {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
}

.endpoint-card .desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ── BIP-110 Fork Tracker ── */
.fork-timeline {
  max-width: 900px;
  margin: 0 auto 24px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.fork-timeline h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
}

.timeline-bar {
  display: flex;
  height: 32px;
  border-radius: var(--radius-xs);
  overflow: hidden;
  margin-bottom: 8px;
}

.timeline-bar .seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  transition: width 0.5s;
}

.timeline-bar .seg.passed { background: var(--bg-elevated); color: var(--text-muted); }
.timeline-bar .seg.current { background: var(--orange); color: #000; }
.timeline-bar .seg.future { background: var(--border); color: var(--text-muted); }
.timeline-bar .seg.fork { background: var(--red); color: #000; }

.tl-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
}

/* ── Status Grid (BIP-110) ── */
.status-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  max-width: 900px;
  margin: 0 auto 24px;
}

.status-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  text-align: center;
}

.status-card .s-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  font-weight: 600;
}

.status-card .s-value {
  font-size: 26px;
  font-weight: 800;
  margin: 4px 0 2px;
}

.status-card .s-sub {
  font-size: 11px;
  color: var(--text-muted);
}

/* ── Impact Grid (BIP-110) ── */
.impact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 900px;
  margin: 0 auto 24px;
}

.impact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  transition: border-color var(--ease);
}

.impact-card:hover {
  border-color: var(--orange);
}

.impact-card .icn {
  font-size: 24px;
  margin-bottom: 4px;
}

.impact-card h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
}

.impact-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.impact-card .tag {
  display: inline-block;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 10px;
  margin-top: 6px;
  font-weight: 600;
}

.tag-ok { background: var(--green-light); color: var(--green); }
.tag-warn { background: var(--yellow-light); color: var(--yellow); }
.tag-danger { background: var(--red-light); color: var(--red); }
.tag-info { background: var(--blue-light); color: var(--blue); }

/* ── Resource Box ── */
.resource-box {
  margin-top: 20px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

.resource-box strong {
  color: var(--text);
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  text-align: center;
  font-size: 15px;
  color: var(--text-secondary);
  margin-top: 48px;
}

footer .links {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

footer .links a {
  color: var(--text-secondary);
  transition: color var(--ease);
}

footer .links a:hover {
  color: var(--text);
  text-decoration: none;
}

/* ── Animations ── */
.data-flash {
  animation: liveFlash 0.6s ease;
}

@keyframes liveFlash {
  0% { opacity: 1; }
  30% { opacity: 0.6; filter: brightness(1.3); }
  100% { opacity: 1; filter: brightness(1); }
}

[id^=seg-] {
  transition: width 0.8s ease, background 0.3s;
  animation: barBreathe 3s ease-in-out infinite;
}

@keyframes barBreathe {
  0%, 100% { opacity: 0.92; }
  50% { opacity: 1; filter: brightness(1.05); }
}

[id^=kpi-], [id^=stat-], [id^=fr-], [id^=mk-], [id^=md-], [id^=cc-], [id^=so-], [id^=ex-], [id^=proj-] {
  transition: color 0.3s, opacity 0.3s;
  animation: numBreathe 4s ease-in-out infinite;
}

@keyframes numBreathe {
  0%, 100% { opacity: 0.95; }
  50% { opacity: 1; }
}

.gauge-fg, [id^=proj-bar] {
  transition: stroke-dasharray 0.8s ease, width 0.8s ease;
  animation: barBreathe 3s ease-in-out infinite;
}

/* ── Utility ── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-mono { font-family: var(--font-mono); }
.text-orange { color: var(--orange); }
.text-green { color: var(--green); }
.text-red { color: var(--red); }
.text-blue { color: var(--blue); }
.text-muted { color: var(--text-secondary); }
.text-muted-light { color: var(--text-muted); }
.font-bold { font-weight: 700; }
.font-black { font-weight: 800; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.w-full { width: 100%; }
.max-w-sm { max-width: 600px; }
.max-w-md { max-width: 900px; }
.max-w-lg { max-width: 1100px; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-0 { margin-top: 0; margin-bottom: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.rounded { border-radius: var(--radius); }
.rounded-sm { border-radius: var(--radius-sm); }
.border { border: 1px solid var(--border); }
.hidden { display: none; }
.relative { position: relative; }
.absolute { position: absolute; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ── Responsive ── */

/* Tablet: 768px+ */
@media (max-width: 1199px) {
  .container {
    padding: 0 var(--space-5);
  }

  .persona-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .thesis-grid {
    grid-template-columns: 1fr;
  }

  .impact-grid {
    grid-template-columns: 1fr 1fr;
  }

  .stats {
    max-width: 100%;
    margin-left: 0;
    margin-right: 0;
  }
}

/* Mobile: <768px */
@media (max-width: 767px) {
  nav {
    padding: 14px 16px;
    gap: 12px;
    font-size: 14px;
  }

  nav .brand {
    font-size: 20px;
  }

  nav .nav-link {
    font-size: 14px;
  }

  nav .cta {
    padding: 10px 18px;
    font-size: 13px;
  }

  nav .dropdown-content {
    min-width: 160px;
  }

  nav a.nav-link:not(.brand):not(.cta):nth-last-child(n+3) {
    display: none;
  }

  .container {
    padding: 0 var(--space-4);
  }

  .hero {
    padding: 60px 20px 40px;
  }

  .hero h1 {
    font-size: clamp(28px, 8vw, 36px);
  }

  .hero .subtitle {
    font-size: 17px;
  }

  .section {
    padding: 24px 0;
  }

  .page-title {
    font-size: 26px;
  }

  /* Grids collapse */
  .grid-2,
  .grid-3,
  .grid-4,
  .persona-grid,
  .thesis-grid,
  .ws-grid,
  .status-grid,
  .impact-grid {
    grid-template-columns: 1fr;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .tabs {
    gap: 2px;
    padding: 3px;
  }

  .tab {
    font-size: 12px;
    padding: 8px 12px;
  }

  .persona-grid {
    gap: 12px;
  }

  .persona-card {
    padding: 20px 16px;
  }

  .ws-card {
    padding: 16px;
  }

  .ws-card .icon {
    font-size: 22px;
    top: 14px;
    right: 14px;
  }

  .ws-card .a {
    font-size: 22px;
  }

  .stat-card {
    min-width: calc(50% - 8px);
  }

  .stat-row {
    gap: 8px;
  }

  .summary-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .live-ticker {
    font-size: 11px;
    gap: 10px;
    white-space: normal;
  }

  .research-links a {
    padding: 10px 16px;
    font-size: 13px;
  }

  .thesis-card {
    padding: 24px;
  }

  .thesis-card h3 {
    font-size: 18px;
  }

  .fork-timeline {
    padding: 16px;
  }

  .status-card .s-value {
    font-size: 22px;
  }

  .decision-card .dc-value {
    font-size: 24px;
  }

  footer {
    padding: 24px 16px;
    font-size: 13px;
  }
}

/* Small mobile: <480px */
@media (max-width: 479px) {
  .stats {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .viz-canvas { height: 250px !important; }
  .canvas-wrap canvas { height: 180px !important; }
  .persona-tab { font-size: 11px; padding: 6px 10px; }
  .ws-card .a { font-size: 20px; }
  .ws-card .q { font-size: 14px; }
  .fee-pill { font-size: 16px; padding: 6px 12px; }
  .page-title { font-size: 22px; }
}