:root {
    --bg: #f5f5f5;
    --bg-panel: #ffffff;
    --text: #333;
    --text-secondary: #666;
    --border: #e0e0e0;
    --accent: #4a90d9;
    --accent-hover: #357abd;
    --danger: #d94a4a;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --input-bg: #fff;
    --input-border: #ccc;
}
body.theme-dark {
    --bg: #1a1a2e;
    --bg-panel: #252540;
    --text: #e0e0e0;
    --text-secondary: #b0b0b0;
    --border: #3a3a55;
    --accent: #6db3f2;
    --accent-hover: #5098d6;
    --danger: #e05555;
    --input-bg: #2a2a42;
    --input-border: #4a4a65;
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
    font-family: 'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}
.admin-top-bar {
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}
.admin-logo { font-size: 1.4em; font-weight: 700; color: var(--accent); }
.admin-nav { display: flex; gap: 4px; }
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 500;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-hover); }
.btn-outline { background: transparent; border: 1.5px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }
.btn-sm { padding: 5px 10px; font-size: 0.8em; }
.btn-xs { padding: 3px 8px; font-size: 0.75em; border-radius: 4px; }
.btn.active { background: var(--accent); color: #fff; }
.admin-content { padding: 24px; max-width: 1200px; margin: 0 auto; }
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-panel);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}
th, td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}
th { background: var(--bg-sidebar, #fafafa); font-weight: 700; }
tr:hover { background: var(--table-hover, #f5f5f5); }
.alert { padding: 12px; border-radius: 6px; margin-bottom: 16px; background: #e6f7e6; color: #2d7a2d; border: 1px solid #b7d5b7; }
.error-msg { color: var(--danger); margin-top: 8px; }
.success-msg { color: #2d7a2d; margin-top: 8px; }
.form-group { margin-bottom: 12px; }
.form-group input, .form-group select, textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--input-border);
    border-radius: 6px;
    font-size: 0.9em;
    background: var(--input-bg);
    color: var(--text);
}
.form-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.form-row input, .form-row select {
    flex: 1;
    min-width: 100px;
    padding: 10px 14px;
    border: 1.5px solid var(--input-border);
    border-radius: 6px;
    background: var(--input-bg);
    color: var(--text);
}
.login-container {
    max-width: 400px;
    margin: 80px auto;
    background: var(--bg-panel);
    border-radius: 14px;
    padding: 30px;
    box-shadow: var(--shadow);
}
.batch-section {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 24px;
}
.batch-section h3 { margin-bottom: 10px; }
.batch-section textarea {
    width: 100%;
    min-height: 150px;
    margin-bottom: 10px;
}
.card-link { color: var(--accent); cursor: pointer; text-decoration: underline; }
.shiny-badge {
    display: inline-block;
    background: #d32f2f;
    color: #fff;
    font-size: 0.7em;
    padding: 1px 6px;
    border-radius: 8px;
    margin-left: 4px;
}
@media (max-width: 768px) {
    .admin-top-bar { flex-direction: column; align-items: flex-start; }
    .admin-nav { flex-wrap: wrap; }
    table { font-size: 0.8em; }
}