/* ==========================================================================
   Tokenomics Course — shared styles
   Design tokens lifted verbatim from the Claude Design handoff.
   ========================================================================== */

:root {
  /* Brand */
  --blue: #2563EB;
  --blue-deep: #1D4ED8;
  --blue-hover: #1747b0;
  --violet: #7C5CFF;

  /* Surfaces */
  --bg: #F5F6F8;
  --card: #ffffff;
  --border: #ECEDF1;
  --border-strong: #E2E4E9;

  /* Text */
  --text: #0B0B0F;
  --text-body: #5B616E;
  --text-muted: #9AA0AC;
  --text-disabled: #C7CCE0;

  /* Status */
  --success: #16A34A;
  --success-bg: #EAFAF1;
  --warning: #F59E0B;
  --warning-bg: #FEF3CD;
  --danger: #E5484D;
  --danger-bg: #FCE9EA;
  --info: #1D4ED8;
  --info-bg: #EEF2FF;

  /* Elevation */
  --card-shadow: 0 2px 4px rgba(11, 11, 15, .04), 0 18px 40px rgba(11, 11, 15, .06);

  --sidebar-w: 260px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--blue-deep); }
a:hover { color: var(--blue-hover); }

h1, h2, h3 { margin: 0; }

.display {
  font-family: 'Fraunces', Georgia, 'Times New Roman', serif;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* --------------------------------------------------------------- shell -- */

.shell {
  display: flex;
  min-height: 100vh;
  background: var(--bg);
}

.sidebar {
  width: var(--sidebar-w);
  flex: none;
  background: var(--card);
  border-right: 1px solid var(--border);
  padding: 26px 20px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand-name { font-family: 'Fraunces', Georgia, serif; font-size: 20px; font-weight: 600; }
.brand-sub {
  font-size: 10.5px; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-muted); margin-top: 2px;
}

.nav { display: flex; flex-direction: column; gap: 2px; }

.nav-link {
  display: block; padding: 8px 10px; border-radius: 8px;
  color: var(--text); font-weight: 600; font-size: 13px; text-decoration: none;
}
.nav-link:hover { background: var(--bg); color: var(--text); }
.nav-link.active { background: var(--info-bg); color: var(--blue-deep); font-weight: 700; }

.nav-section {
  font-size: 10.5px; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--text-muted); margin: 14px 0 4px 10px;
}

.nav-locked {
  padding: 8px 10px; border-radius: 8px; color: var(--text-disabled);
  font-weight: 600; font-size: 13px; display: flex; justify-content: space-between;
  cursor: not-allowed;
}
.nav-locked .lock { font-size: 10px; }

.nav-note { padding: 8px 10px; font-size: 11.5px; color: var(--text-muted); font-style: italic; }

.nav-current { padding: 6px 10px; font-weight: 800; font-size: 13px; color: var(--text); }

/* Lab step sub-nav */
.step {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px 8px 20px; border-radius: 8px; cursor: pointer;
  background: transparent; border-left: 3px solid transparent;
  width: 100%; text-align: left; font-family: inherit;
  border-top: none; border-right: none; border-bottom: none;
}
.step:hover { background: var(--bg); }
.step.active { background: var(--info-bg); border-left-color: var(--blue-deep); }
.step-dot {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--border); color: var(--text-muted);
  font-size: 10px; font-weight: 800;
  display: flex; align-items: center; justify-content: center; flex: none;
}
.step.active .step-dot { background: var(--blue-deep); color: #fff; }
.step.done .step-dot { background: var(--success); color: #fff; }
.step-label { font-size: 12.5px; font-weight: 600; color: var(--text); }
.step.active .step-label { color: var(--blue-deep); }

/* Progress card, pinned bottom */
.progress-card { margin-top: auto; background: var(--bg); border-radius: 14px; padding: 14px; }
.progress-title { font-size: 11px; font-weight: 700; color: var(--text-body); margin-bottom: 8px; }
.progress-track { height: 6px; background: var(--border); border-radius: 20px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--blue-deep); border-radius: 20px; width: 0; transition: width .25s ease; }
.progress-label { font-size: 11px; color: var(--text-muted); margin-top: 6px; }

.main { flex: 1; padding: 56px 64px; max-width: 1280px; }
.main--lab { padding: 48px 64px; max-width: 1180px; }

/* --------------------------------------------------------------- type -- */

.eyebrow {
  font-size: 11px; font-weight: 800; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--blue-deep);
}

.section-label {
  font-size: 14px; font-weight: 700; color: var(--text-body);
  text-transform: uppercase; letter-spacing: 0.04em; margin: 0 0 12px;
}

.lede { font-size: 16px; color: var(--text-body); line-height: 1.6; max-width: 640px; }

/* --------------------------------------------------------------- bits -- */

.pill-row { display: flex; gap: 10px; flex-wrap: wrap; }
.pill {
  font-size: 12px; font-weight: 700; color: var(--text-body);
  background: var(--card); border: 1px solid var(--border);
  border-radius: 20px; padding: 6px 12px;
}

.callout { padding: 14px 16px; border-radius: 8px; line-height: 1.55; }
.callout--info { background: var(--info-bg); border-left: 4px solid var(--info); }
.callout--warn { background: var(--warning-bg); border-left: 4px solid var(--warning); }
.callout--ok { background: var(--success-bg); border-left: 4px solid var(--success); }
.callout--bad { background: var(--danger-bg); border-left: 4px solid var(--danger); }

/* Lab cards on the home page */
.lab-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px; }
.lab-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 20px;
  padding: 24px; display: flex; flex-direction: column; gap: 12px;
  box-shadow: var(--card-shadow);
}
.lab-card--locked { opacity: .6; }
.lab-card-head { display: flex; align-items: center; justify-content: space-between; }
.lab-emoji { font-size: 28px; }
.badge {
  font-size: 10.5px; font-weight: 800; padding: 4px 10px; border-radius: 20px;
  letter-spacing: 0.03em; text-transform: uppercase;
}
.badge--none { background: rgba(154, 160, 172, .16); color: var(--text-body); }
.badge--progress { background: rgba(29, 78, 216, .1); color: var(--blue-deep); }
.badge--done { background: rgba(22, 163, 74, .12); color: var(--success); }
.badge--soon { background: var(--bg); color: var(--text-muted); }
.lab-title { font-size: 18px; font-weight: 800; }
.lab-desc { font-size: 13.5px; color: var(--text-body); line-height: 1.55; flex: 1; }
.lab-meta { font-size: 11.5px; color: var(--text-muted); }
.lab-bar { height: 5px; background: var(--border); border-radius: 20px; overflow: hidden; }
.lab-bar > div { height: 100%; background: var(--blue-deep); width: 0; }

.btn {
  text-decoration: none; text-align: center; background: var(--blue-deep); color: #fff;
  font-size: 13.5px; font-weight: 700; padding: 10px; border-radius: 10px;
  border: none; cursor: pointer; font-family: inherit; display: block;
}
.btn:hover { background: var(--blue-hover); color: #fff; }
.btn--ghost {
  background: var(--card); color: var(--text);
  border: 1px solid var(--border); padding: 10px 20px;
}
.btn--ghost:hover { background: var(--bg); color: var(--text); }
.btn--ghost:disabled { color: var(--text-disabled); cursor: not-allowed; }
.btn--locked { background: var(--bg); color: var(--text-muted); cursor: not-allowed; }

/* Metric tiles */
.metrics { display: grid; gap: 12px; }
.metrics--4 { grid-template-columns: repeat(4, 1fr); }
.metrics--3 { grid-template-columns: repeat(3, 1fr); }
.metrics--2x2 { grid-template-columns: 1fr 1fr; gap: 10px; }
.metric {
  background: var(--blue-deep); color: #fff; border-radius: 12px;
  padding: 16px; text-align: center;
}
.metric--sm { border-radius: 10px; padding: 14px; }
.metric-label { font-size: 11px; opacity: .85; text-transform: uppercase; }
.metric--sm .metric-label { font-size: 10px; }
.metric-value { font-size: 22px; font-weight: 800; margin-top: 4px; }
.metric--sm .metric-value { font-size: 20px; margin-top: 2px; }
.metric-value--sm { font-size: 14px; font-weight: 800; margin-top: 6px; }

.status-chip { padding: 3px 9px; border-radius: 20px; }

/* Comparison / breakdown cards */
.panel {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px;
}
.panel-title {
  font-weight: 700; font-size: 13px; border-bottom: 2px solid var(--blue-deep);
  padding-bottom: 8px; margin-bottom: 10px;
}
.row { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 6px; }
.row:last-child { margin-bottom: 0; }
.row-key { color: var(--text-body); }
.row-sep { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border); }
.row-cap { font-size: 10.5px; text-transform: uppercase; color: var(--text-muted); }

.breakdown {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 8px 20px;
}
.breakdown-row {
  display: flex; justify-content: space-between; padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.breakdown-row:last-of-type { border-bottom: none; }
.breakdown-total {
  display: flex; justify-content: space-between; padding: 14px 16px;
  margin: 8px -20px -8px; background: var(--blue-deep); color: #fff;
  border-radius: 0 0 14px 14px;
}

/* Two-column exercise layout */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.split--tight { gap: 16px; }

/* Form controls */
label {
  display: block; font-size: 11px; font-weight: 700; color: var(--text-body);
  text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 6px;
}
select, textarea {
  font-family: inherit; font-size: 13.5px; padding: 9px 10px;
  border: 1px solid var(--border); border-radius: 8px; background: var(--card);
  width: 100%; color: var(--text);
}
textarea { padding: 10px; }
select:focus, textarea:focus {
  outline: none; border-color: var(--blue-deep);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, .12);
}
.field { margin-bottom: 16px; }
.field:last-child { margin-bottom: 0; }

.toggle-group { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.toggle {
  padding: 10px; border-radius: 8px; font-weight: 700; font-size: 12.5px;
  cursor: pointer; border: 2px solid var(--border); background: var(--card);
  color: var(--text); font-family: inherit;
}
.toggle[aria-pressed="true"] {
  border-color: var(--blue-deep); background: var(--blue-deep); color: #fff;
}

.strategy-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.strategy {
  padding: 12px; border-radius: 8px; font-weight: 700; font-size: 13px;
  cursor: pointer; border: 2px solid var(--border); background: var(--card);
  color: var(--text); font-family: inherit; text-align: center;
}
.strategy:hover { border-color: var(--text-disabled); }
.strategy[aria-pressed="true"] { border-color: var(--blue-deep); }

/* Architecture preview (links to the animation) */
.arch-link {
  display: block; text-decoration: none; background: var(--card);
  border: 1px solid var(--border); border-radius: 16px; padding: 24px;
}
.arch-link:hover { border-color: var(--text-disabled); }
.arch-row { display: flex; align-items: center; gap: 14px; }
.arch-box { flex: 1; text-align: center; border-radius: 12px; padding: 14px 10px; }
.arch-box--1 { background: var(--blue-deep); color: #fff; }
.arch-box--2 { background: linear-gradient(135deg, #1D4ED8 0%, #2563EB 45%, #7C5CFF 100%); color: #fff; }
.arch-box--3 { background: var(--info-bg); border: 1px solid #DCE3FB; color: var(--text); }
.arch-name { font-weight: 800; font-size: 13px; }
.arch-sub { font-size: 11px; opacity: .85; margin-top: 4px; }
.arch-box--3 .arch-sub { opacity: .7; }
.arch-arrow { font-size: 20px; color: var(--text-muted); }
.arch-cta { text-align: center; margin-top: 14px; font-size: 12.5px; font-weight: 700; color: var(--blue-deep); }

/* Wizard footer */
.wizard-nav {
  display: flex; justify-content: space-between; margin-top: 36px;
  padding-top: 20px; border-top: 1px solid var(--border);
}

.page { display: none; }
.page.active { display: block; }

.qa h3 { font-size: 15px; font-weight: 700; margin: 24px 0 8px; }
.qa h3:first-child { margin-top: 0; }
.qa p { line-height: 1.6; margin: 0; }

/* ---------------------------------------------------------- animation -- */

.anim-wrap {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 24px; box-shadow: var(--card-shadow);
}
#pipelineCanvas { width: 100%; height: auto; display: block; }

.anim-controls { display: flex; gap: 10px; align-items: center; margin-top: 16px; }

/* ------------------------------------------------------------ responsive */

@media (max-width: 1100px) {
  .lab-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .shell { flex-direction: column; }
  .sidebar {
    width: 100%; height: auto; position: static;
    border-right: none; border-bottom: 1px solid var(--border);
  }
  .progress-card { margin-top: 16px; }
  .main, .main--lab { padding: 32px 24px; }
  .split { grid-template-columns: 1fr; gap: 20px; }
  .lab-grid { grid-template-columns: 1fr; }
  .metrics--4 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .metrics--4, .metrics--3, .strategy-grid { grid-template-columns: 1fr; }
  .arch-row { flex-direction: column; }
  .arch-arrow { transform: rotate(90deg); }
  .main, .main--lab { padding: 24px 16px; }
}