/* AI Sales System - lightweight admin styles (matches humtun.com visual language) */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color: #1f2937; background: #f5f7fa; }
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }

/* Topbar */
.topbar {
  display: flex; align-items: center; gap: 24px;
  padding: 12px 24px;
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.brand { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-weight: 700; color: #111827; font-size: 16px; }
.brand-sub { color: #6b7280; font-size: 11px; }
.mainnav { display: flex; gap: 18px; margin-left: 16px; flex: 1; }
.mainnav a { color: #4b5563; font-weight: 500; padding: 4px 0; border-bottom: 2px solid transparent; }
.mainnav a.active { color: #2563eb; border-bottom-color: #2563eb; }
.userbox { display: flex; align-items: center; gap: 12px; font-size: 13px; color: #4b5563; }
.userbox .user em { color: #9ca3af; font-style: normal; }
.userbox .link { color: #6b7280; font-size: 12px; }

/* Layout */
.content { padding: 24px; max-width: 1200px; margin: 0 auto; }
.footer { text-align: center; padding: 16px; color: #9ca3af; font-size: 12px; border-top: 1px solid #e5e7eb; margin-top: 40px; }

/* Page */
.page { background: #fff; border-radius: 8px; padding: 24px; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.page-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.page-head h2 { margin: 0; font-size: 20px; }
.muted { color: #6b7280; font-size: 13px; }

/* Buttons */
.btn {
  display: inline-block; padding: 8px 16px;
  border: 1px solid #d1d5db; border-radius: 6px;
  background: #fff; color: #374151;
  font-size: 13px; cursor: pointer; text-decoration: none;
}
.btn:hover { background: #f9fafb; text-decoration: none; }
.btn-primary { background: #2563eb; border-color: #2563eb; color: #fff; }
.btn-primary:hover { background: #1d4ed8; }

/* Forms */
.form-card { display: flex; flex-direction: column; gap: 12px; max-width: 420px; }
.form-card label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: #374151; }
.form-card input { padding: 8px 10px; border: 1px solid #d1d5db; border-radius: 6px; font-size: 14px; }
.form-card input:focus { outline: 2px solid #93c5fd; border-color: #2563eb; }
.form-actions { display: flex; gap: 8px; margin-top: 8px; }

/* Login */
.login-wrap { min-height: 70vh; display: flex; align-items: center; justify-content: center; }
.login-card {
  width: 360px; padding: 32px; background: #fff;
  border-radius: 10px; box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}
.login-head { text-align: center; margin-bottom: 20px; }
.login-head h1 { margin: 0; font-size: 22px; color: #111827; }
.login-form { display: flex; flex-direction: column; gap: 14px; }
.login-form label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: #374151; }
.login-form input { padding: 10px 12px; border: 1px solid #d1d5db; border-radius: 6px; font-size: 14px; }
.login-form input:focus { outline: 2px solid #93c5fd; border-color: #2563eb; }
.login-form button { margin-top: 6px; padding: 10px; }
.footer-note { text-align: center; color: #9ca3af; font-size: 11px; margin-top: 14px; }

/* Dashboard */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 24px; }
.stat-card { padding: 16px; background: #f9fafb; border: 1px solid #e5e7eb; border-radius: 8px; }
.stat-card.stat-accent { background: #eff6ff; border-color: #bfdbfe; }
.stat-card.stat-warn { background: #fef3c7; border-color: #fde68a; }
.stat-label { font-size: 12px; color: #6b7280; }
.stat-value { font-size: 24px; font-weight: 700; color: #111827; margin-top: 4px; }

.empty-state { padding: 24px; background: #f9fafb; border-radius: 8px; border: 1px dashed #d1d5db; }
.empty-state h3 { margin: 0 0 8px; font-size: 16px; }

/* Flash */
.flash-area { margin-bottom: 16px; }
.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 8px; font-size: 13px; }
.flash-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.flash-success { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.flash-info { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }

/* Error page */
.error-card { text-align: center; padding: 40px 20px; }
.error-code { font-size: 64px; font-weight: 700; color: #2563eb; }
.error-msg { color: #6b7280; margin-bottom: 20px; }