* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  background: #0d1117;
  color: #e6edf3;
  min-height: 100vh;
}

a { color: #58a6ff; }

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
  background: #161b22;
  border-bottom: 1px solid #30363d;
  position: sticky; top: 0; z-index: 10;
  flex-wrap: wrap;
}

.brand { font-size: 20px; font-weight: 700; }
.paper-badge {
  background: #1f6feb33;
  color: #79c0ff;
  border: 1px solid #1f6feb;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
}

nav { display: flex; flex-wrap: wrap; gap: 4px; margin-left: auto; }
.nav-btn {
  background: transparent;
  color: #e6edf3;
  border: 1px solid #30363d;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
.nav-btn:hover { background: #21262d; }
.nav-btn.active { background: #1f6feb; border-color: #1f6feb; color: white; }

main {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 24px 80px;
}

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

h2 { margin-top: 0; border-bottom: 1px solid #30363d; padding-bottom: 8px; }
h3 { margin-top: 32px; }
.muted { color: #8b949e; font-size: 14px; }

.summary-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.card {
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 16px;
}
.card-label { color: #8b949e; font-size: 12px; text-transform: uppercase; }
.card-value { font-size: 28px; font-weight: 700; margin: 8px 0 4px; }
.card-sub   { color: #8b949e; font-size: 13px; }

.positive { color: #3fb950; }
.negative { color: #f85149; }

.actions-row { margin: 16px 0; }

button {
  background: #238636;
  color: white;
  border: 0;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}
button:hover { filter: brightness(1.1); }
button[disabled] { opacity: 0.5; cursor: not-allowed; }

input, textarea, select {
  background: #0d1117;
  color: #e6edf3;
  border: 1px solid #30363d;
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 14px;
  font-family: inherit;
}
textarea { width: 100%; resize: vertical; }

form { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
form input[type="text"], form input:not([type]) { flex: 1; min-width: 120px; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 14px;
}
th, td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid #30363d;
}
th { color: #8b949e; font-weight: 500; font-size: 12px; text-transform: uppercase; }

ul { list-style: none; padding: 0; }
li {
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 6px;
  padding: 10px 14px;
  margin-bottom: 8px;
}

.decision-row {
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 6px;
  padding: 14px;
  margin-bottom: 10px;
  cursor: pointer;
}
.decision-row:hover { border-color: #58a6ff; }
.decision-row .date { color: #8b949e; font-size: 12px; }
.decision-row .summary { font-weight: 600; margin: 4px 0; }
.decision-row .lessons { color: #8b949e; font-size: 13px; }
.badge {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
  margin-right: 4px;
}
.badge-buy  { background: #3fb95033; color: #3fb950; }
.badge-sell { background: #f8514933; color: #f85149; }
.badge-hold { background: #8b949e33; color: #8b949e; }

.detail {
  background: #0d1117;
  border: 1px solid #58a6ff;
  border-radius: 8px;
  padding: 16px;
  margin-top: 16px;
}
.detail.hidden { display: none; }
.detail h3 { margin-top: 0; }
.detail pre, .codeblock {
  background: #010409;
  border: 1px solid #30363d;
  border-radius: 6px;
  padding: 12px;
  overflow-x: auto;
  font-size: 12px;
  white-space: pre-wrap;
}

#chat-log {
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 12px;
  max-height: 420px;
  overflow-y: auto;
  margin-bottom: 12px;
}
.chat-msg { margin: 8px 0; padding: 8px 12px; border-radius: 8px; }
.chat-user      { background: #1f6feb33; border-left: 3px solid #1f6feb; }
.chat-assistant { background: #238636 22; border-left: 3px solid #3fb950; background: #23863622; }

#sim-chart {
  height: 260px;
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 12px;
  display: flex;
  align-items: flex-end;
  gap: 2px;
}
#sim-chart .bar { flex: 1; background: #1f6feb; min-width: 4px; }
#sim-chart .bar.baseline { background: #8b949e; opacity: 0.6; }

.bottombar {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: #161b22;
  border-top: 1px solid #30363d;
  color: #8b949e;
  font-size: 12px;
  text-align: center;
  padding: 6px;
}

/* ---------- Help / onboarding ---------- */
.help-btn {
  background: #1f6feb22; color: #79c0ff; border: 1px solid #1f6feb;
  border-radius: 999px; width: 26px; height: 26px; padding: 0;
  font-size: 14px; font-weight: 700; cursor: pointer;
}
.help-btn:hover { background: #1f6feb44; filter: none; }

/* context-aware hint shown under the header per view */
.page-help {
  background: #1f6feb14;
  border: 1px solid #1f6feb55;
  border-left: 3px solid #1f6feb;
  border-radius: 8px;
  padding: 10px 14px;
  margin: 0 0 18px;
  font-size: 14px;
  color: #c9d1d9;
}
.page-help b { color: #79c0ff; }

/* welcome modal */
.modal-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(1, 4, 9, 0.7);
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 12px;
  padding: 24px;
  max-width: 560px;
  width: 100%;
  max-height: 88vh;
  overflow-y: auto;
}
.modal h2 { border: 0; margin: 0 0 4px; }
.modal .modal-actions { display: flex; gap: 10px; margin-top: 18px; }
.modal .secondary { background: transparent; border: 1px solid #30363d; color: #e6edf3; }

/* workflow steps */
.workflow { display: flex; flex-wrap: wrap; gap: 8px; align-items: stretch; margin: 16px 0; }
.workflow .step {
  flex: 1; min-width: 150px;
  background: #161b22; border: 1px solid #30363d; border-radius: 8px; padding: 12px;
}
.workflow .step .n {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; border-radius: 999px;
  background: #1f6feb; color: white; font-size: 12px; font-weight: 700; margin-right: 6px;
}
.workflow .step b { display: inline; }
.workflow .step p { color: #8b949e; font-size: 13px; margin: 8px 0 0; }
.workflow .arrow { align-self: center; color: #8b949e; font-size: 20px; }

/* concept cards */
.concept-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin: 16px 0;
}
.concept {
  background: #161b22; border: 1px solid #30363d; border-radius: 8px; padding: 14px;
}
.concept h4 { margin: 0 0 6px; font-size: 15px; }
.concept p { color: #8b949e; font-size: 13px; margin: 0; }

.faq { margin: 8px 0; }
.faq summary { cursor: pointer; padding: 10px 0; border-bottom: 1px solid #30363d; font-weight: 600; }
.faq[open] summary { color: #79c0ff; }
.faq p { color: #c9d1d9; font-size: 14px; padding: 8px 0; }

abbr.glossary { text-decoration: none; }