:root {
  --admin-primary: #1a73e8;
  --admin-bg: #f0f2f5;
  --admin-sidebar: #1e293b;
  --admin-sidebar-hover: #334155;
  --admin-card-bg: #ffffff;
  --admin-border: #e2e8f0;
  --admin-text: #1e293b;
  --admin-muted: #64748b;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

/* ============ Login Page ============ */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.login-container { width: 100%; max-width: 400px; padding: 20px; }

.login-card {
  background: #fff;
  border-radius: 12px;
  padding: 40px 32px;
  box-shadow: 0 20px 60px rgba(0,0,0,.15);
}

.login-header { text-align: center; margin-bottom: 32px; }

.login-brand {
  display: inline-block;
  width: 56px; height: 56px;
  line-height: 56px;
  background: var(--admin-primary);
  color: #fff;
  border-radius: 14px;
  font-size: 28px;
  font-weight: 900;
  margin-bottom: 12px;
}

.login-header h1 { font-size: 20px; color: var(--admin-text); margin-bottom: 4px; }
.login-header p { font-size: 14px; color: var(--admin-muted); }

.login-error {
  background: #fef2f2;
  color: #dc2626;
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 14px;
  margin-bottom: 20px;
  border: 1px solid #fecaca;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--admin-text);
  margin-bottom: 6px;
}

.form-group input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--admin-border);
  border-radius: 6px;
  font-size: 14px;
  transition: border-color .2s;
  outline: none;
}

.form-group input:focus { border-color: var(--admin-primary); box-shadow: 0 0 0 3px rgba(26,115,232,.15); }

.captcha-row { display: flex; gap: 10px; align-items: stretch; }
.captcha-row input { flex: 0 0 96px; height: 48px; }
.captcha-img {
  height: 48px;
  width: auto;
  flex: 1;
  min-width: 0;
  object-fit: cover;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid var(--admin-border);
}

.login-btn {
  width: 100%;
  padding: 12px;
  background: var(--admin-primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: background .2s;
}

.login-btn:hover { background: #1557b0; }

/* ============ Admin Layout ============ */
.admin-body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  display: flex;
  min-height: 100vh;
  background: var(--admin-bg);
  color: var(--admin-text);
}

.admin-sidebar {
  width: 220px;
  background: var(--admin-sidebar);
  color: #e2e8f0;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-brand {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.sidebar-brand .brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: var(--admin-primary);
  color: #fff;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 900;
}

.sidebar-brand .brand-text { font-size: 16px; font-weight: 600; }

.sidebar-nav { padding: 12px 0; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  color: #94a3b8;
  text-decoration: none;
  font-size: 14px;
  transition: all .2s;
}

.nav-item:hover { background: var(--admin-sidebar-hover); color: #e2e8f0; }
.nav-item.active { background: var(--admin-primary); color: #fff; }
.nav-icon { font-size: 18px; width: 24px; text-align: center; }

.admin-main {
  flex: 1;
  margin-left: 220px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.admin-topbar {
  background: #fff;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--admin-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-title { font-size: 16px; font-weight: 600; }

.topbar-user {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: var(--admin-muted);
}

.logout-link {
  color: var(--admin-primary);
  text-decoration: none;
  font-size: 14px;
}

.logout-link:hover { text-decoration: underline; }

.admin-content {
  flex: 1;
  padding: 24px;
}

/* ============ Admin Components ============ */
.admin-card {
  background: var(--admin-card-bg);
  border-radius: 8px;
  padding: 24px;
  border: 1px solid var(--admin-border);
  margin-bottom: 24px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.summary-card {
  background: var(--admin-card-bg);
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  padding: 18px 20px;
}

.summary-card span,
.summary-card small {
  display: block;
  color: var(--admin-muted);
  font-size: 13px;
}

.summary-card strong {
  display: block;
  margin: 6px 0;
  color: var(--admin-text);
  font-size: 28px;
  line-height: 1.1;
}

.admin-card h3 { margin-top: 0; font-size: 16px; }

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.admin-table thead th {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 2px solid var(--admin-border);
  color: var(--admin-muted);
  font-weight: 500;
}

.admin-table tbody td { padding: 10px 8px; border-bottom: 1px solid var(--admin-border); }

.pagination {
  margin-top: 16px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.page-btn {
  padding: 6px 12px;
  border: 1px solid var(--admin-border);
  border-radius: 4px;
  text-decoration: none;
  color: var(--admin-text);
  font-size: 14px;
}

.page-btn:hover { background: #f1f5f9; }

.page-info { color: var(--admin-muted); font-size: 14px; }

.dashboard-welcome {
  background: var(--admin-card-bg);
  border-radius: 8px;
  padding: 32px;
  border: 1px solid var(--admin-border);
}

.dashboard-welcome h2 { margin-bottom: 12px; }
.dashboard-welcome p { color: var(--admin-muted); margin-bottom: 8px; }


/* ==================== 交易日志 ==================== */
.summary-card.active {
  border: 2px solid var(--admin-primary);
  background: #eff6ff;
}
.trade-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .3px;
}
.trade-planned { background: #f0f9ff; color: #0369a1; }
.trade-open { background: #fef3c7; color: #92400e; }
.trade-closed { background: #f0fdf4; color: #15803d; }

.trade-fieldset {
  margin: 0 0 20px;
  padding: 22px 24px 18px;
  border: 1px solid var(--admin-border);
  border-radius: 10px;
  background: #fafbfc;
}
.trade-fieldset legend {
  font-size: 15px;
  font-weight: 700;
  color: #1e293b;
  padding: 0 10px;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 14px;
}
.form-field { display: flex; flex-direction: column; }
.form-field label {
  font-size: 13px;
  font-weight: 600;
  color: #334155;
  margin-bottom: 6px;
}
.form-field input[type="text"],
.form-field input[type="number"],
.form-field input[type="datetime-local"],
.form-field select,
.form-field textarea {
  padding: 8px 10px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: #1e293b;
}
.form-field textarea { resize: vertical; min-height: 60px; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--admin-primary);
  box-shadow: 0 0 0 3px rgba(26,115,232,.15);
}
.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}
.detail-item.full { grid-column: 1 / -1; }
.detail-label {
  font-size: 12px;
  color: #64748b;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: .3px;
}
.detail-value {
  font-size: 14px;
  color: #1e293b;
  line-height: 1.6;
}