:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --success: #16a34a;
  --warning: #d97706;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.5;
}

.wrap { max-width: 480px; margin: 80px auto; padding: 0 20px; }
.card { background: var(--card); padding: 24px; border-radius: 14px; box-shadow: 0 1px 2px rgba(0,0,0,0.04), 0 6px 16px rgba(15,23,42,0.06); margin: 18px 0; }
.card h1 { margin-top: 0; }
.card h2 { margin-top: 0; font-size: 18px; }
.muted { color: var(--muted); font-size: 14px; }
.error { color: var(--danger); font-size: 14px; }

.tabs { display: flex; gap: 4px; margin: 18px 0; border-bottom: 1px solid var(--border); }
.tab {
  background: transparent; border: 0; padding: 10px 14px; cursor: pointer;
  font-weight: 500; color: var(--muted); border-bottom: 2px solid transparent;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }

label { display: block; margin: 14px 0; font-weight: 500; }
input[type=text], input[type=email], input[type=password], textarea {
  display: block; width: 100%; margin-top: 6px;
  padding: 10px 12px; font-size: 14px; font-family: inherit;
  background: #fff; color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; outline: none;
}
input:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.15); }
textarea { resize: vertical; }

button.primary {
  background: var(--primary); color: #fff; border: 0;
  padding: 10px 18px; border-radius: 8px; cursor: pointer;
  font-weight: 600; font-size: 14px;
}
button.primary:hover { background: var(--primary-hover); }
button.primary:disabled { background: #94a3b8; cursor: not-allowed; }

button.link {
  background: transparent; border: 0; color: var(--primary);
  cursor: pointer; padding: 4px 6px; font-size: 14px;
}
button.link:hover { text-decoration: underline; }

.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 24px; background: var(--card);
  border-bottom: 1px solid var(--border);
}
.topbar .muted { margin-left: auto; }

.container { max-width: 760px; margin: 24px auto; padding: 0 20px; }

.faq-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px; padding: 10px; border: 1px dashed var(--border); border-radius: 8px;
  margin-bottom: 14px;
}
.faq-list { list-style: none; padding: 0; margin: 0; }
.faq-list li {
  padding: 12px 14px; border: 1px solid var(--border); border-radius: 8px;
  margin-bottom: 8px; background: #fafbfc;
}
.faq-list .q { font-weight: 600; }
.faq-list .a { color: var(--muted); margin-top: 4px; white-space: pre-wrap; }
.faq-list .row { display: flex; gap: 8px; margin-top: 8px; }
.faq-list input, .faq-list textarea { margin-top: 4px; font-size: 13px; }

.snippet {
  background: #0f172a; color: #e2e8f0;
  padding: 14px; border-radius: 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px; overflow-x: auto;
  white-space: pre-wrap; word-break: break-all;
}

.escalations { list-style: none; padding: 0; margin: 0; }
.escalations li {
  padding: 12px 14px; border: 1px solid var(--border); border-radius: 8px;
  margin-bottom: 8px;
}
.escalations li.resolved { background: #f0fdf4; }
.escalations .meta { color: var(--muted); font-size: 13px; }
.escalations .meta strong { color: var(--text); }
.escalations .q { margin-top: 6px; }

/* Plan and usage card */
.usage-summary { margin-top: 8px; }
.usage-tier { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.usage-bar {
  height: 10px;
  background: #f1f5f9;
  border-radius: 999px;
  overflow: hidden;
  margin: 8px 0;
}
.usage-fill {
  height: 100%;
  width: 0%;
  background: var(--primary);
  transition: width 0.2s ease;
}
.usage-fill.usage-fill-warn { background: var(--warning); }
.usage-text { font-size: 13px; }

/* Upgrade card */
.upgrade-tiers { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
.upgrade-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fafbfc;
}
.upgrade-row.current { background: #eff6ff; border-color: #bfdbfe; }
.upgrade-label { font-weight: 600; font-size: 15px; }
.upgrade-price { font-size: 14px; margin-top: 2px; }
.upgrade-note { font-size: 12px; margin-top: 2px; }
.upgrade-slots {
  display: inline-block;
  margin-right: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #b45309;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  padding: 3px 8px;
  border-radius: 999px;
}
.upgrade-slots.sold-out {
  color: #6b7280;
  background: #f3f4f6;
  border-color: #e5e7eb;
}
.current-tag {
  display: inline-block;
  margin-left: 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--primary);
  background: #dbeafe;
  padding: 1px 6px;
  border-radius: 999px;
}
.upgrade-action { display: flex; align-items: center; }
.upgrade-action button.primary { white-space: nowrap; }
.upgrade-action button.link { color: var(--muted); cursor: default; }
.upgrade-msg {
  margin-top: 12px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
}
.upgrade-msg-ok { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }
.upgrade-msg-err { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }