:root {
  --teal: #0D9488;
  --teal-hover: #0F766E;
  --orange: #FB923C;
  --text: #111827;
  --text-secondary: #6B7280;
  --border: #E5E7EB;
  --bg-subtle: #F3F4F6;
  --warning-bg: #FEF3C7;
  --warning-text: #92400E;
  --danger: #DC2626;
  --danger-bg: #FEF2F2;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: #fff;
}
button, input, textarea, select { font-family: inherit; }

/* Login screen */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #F0FDFA 0%, #fff 100%);
}
.login-card {
  width: 340px;
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 20px 60px -20px rgba(13, 148, 136, 0.2);
}
.login-card .brand { display: flex; align-items: center; gap: 10px; margin-bottom: 24px; }
.login-card .brand img.icon { width: 32px; height: 32px; border-radius: 8px; }
.login-card .brand img.wordmark { height: 18px; }
.login-card h1 { font-size: 16px; margin: 0 0 20px; color: var(--text-secondary); font-weight: 600; }

input[type="email"], input[type="password"], input[type="text"], input[type="number"], textarea, select {
  width: 100%;
  box-sizing: border-box;
  padding: 9px 12px;
  margin: 4px 0 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}

button {
  background: var(--teal);
  color: #fff;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
button:hover { background: var(--teal-hover); }
button:disabled { background: #9ca3af; cursor: not-allowed; }
button.secondary { background: #fff; color: var(--teal); border: 1px solid var(--teal); }
button.secondary:hover { background: var(--bg-subtle); }
button.danger { background: var(--danger); }
button.small { padding: 5px 10px; font-size: 12px; }

.status-msg { font-size: 13px; margin-top: 6px; }
.status-msg.error { color: var(--danger); }
.status-msg.success { color: #15803d; }

/* App shell */
.app-shell { display: none; min-height: 100vh; }
.app-shell.visible { display: flex; }

.sidebar {
  width: 220px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
}
.sidebar .brand { display: flex; align-items: center; gap: 8px; padding: 0 8px 24px; }
.sidebar .brand img.icon { width: 28px; height: 28px; border-radius: 7px; }
.sidebar .brand img.wordmark { height: 16px; }
.nav-item {
  display: block;
  padding: 9px 12px;
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  margin-bottom: 2px;
}
.nav-item:hover { background: var(--bg-subtle); }
.nav-item.active { background: var(--teal); color: #fff; }
.sidebar-footer { margin-top: auto; padding-top: 16px; border-top: 1px solid var(--border); }
.sidebar-footer .email { font-size: 12px; color: var(--text-secondary); margin-bottom: 8px; word-break: break-all; }

.main-content { flex: 1; padding: 32px 40px; overflow-y: auto; max-height: 100vh; }
.page-title { font-size: 22px; margin: 0 0 24px; }

/* Stat cards */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 32px; }
.stat-card { border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.stat-card .label { font-size: 12px; color: var(--text-secondary); font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; }
.stat-card .value { font-size: 26px; font-weight: 700; margin-top: 6px; }
.stat-card .sub { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }

.section-block { border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.section-block h3 { font-size: 15px; margin: 0 0 14px; }

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; padding: 8px 10px; color: var(--text-secondary); font-weight: 600; border-bottom: 1px solid var(--border); font-size: 12px; text-transform: uppercase; }
td { padding: 10px; border-bottom: 1px solid var(--bg-subtle); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
.table-actions { display: flex; gap: 6px; }

.chip { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.chip.status-open { background: var(--warning-bg); color: var(--warning-text); }
.chip.status-in_progress { background: #DBEAFE; color: #1E40AF; }
.chip.status-resolved { background: #D1FAE5; color: #065F46; }
.chip.status-pending { background: var(--warning-bg); color: var(--warning-text); }
.chip.status-converted { background: #D1FAE5; color: #065F46; }

.search-row { display: flex; gap: 10px; margin-bottom: 16px; }
.search-row input { margin: 0; flex: 1; }
.search-row button { width: auto; }

/* Detail panel (slides in as a simple overlay-free section swap) */
.back-link { display: inline-block; margin-bottom: 16px; color: var(--teal); cursor: pointer; font-size: 13px; text-decoration: underline; }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.kv-row { display: flex; justify-content: space-between; padding: 6px 0; font-size: 13px; border-bottom: 1px solid var(--bg-subtle); }
.kv-row .k { color: var(--text-secondary); }

.credit-adjust-row { display: flex; gap: 8px; align-items: flex-end; margin-top: 12px; }
.credit-adjust-row input { margin: 0; }
.credit-adjust-row button { width: auto; }

.danger-zone-inline { border: 1px solid #FECACA; background: var(--danger-bg); border-radius: 10px; padding: 14px; margin-top: 16px; }

.hidden { display: none !important; }

.pack-row, .setting-row {
  display: grid;
  grid-template-columns: 1fr 100px 100px 140px 80px auto;
  gap: 10px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--bg-subtle);
  font-size: 13px;
}
.pack-row input { margin: 0; }
.setting-row { grid-template-columns: 200px 1fr auto; }

@media (max-width: 900px) {
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
}