/* ============================================================
   NFC 碰一碰营销后台 — 管理面板样式
   ============================================================ */

:root {
    --primary: #4f46e5;
    --primary-light: #e0e7ff;
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --sidebar-width: 240px;
    --topbar-height: 56px;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
}

/* ---------- Reset / Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    display: flex;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Sidebar ---------- */
.sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
    background: var(--gray-900);
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed; top: 0; left: 0; bottom: 0;
    z-index: 100;
    transition: transform .2s;
}
.sidebar-brand {
    padding: 20px 20px 28px;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: .02em;
    border-bottom: 1px solid var(--gray-700);
}
.sidebar-brand .icon { margin-right: 8px; }
.sidebar-nav { flex: 1; padding: 12px 0; list-style: none; }
.sidebar-nav li a {
    display: flex; align-items: center; gap: 10px;
    padding: 11px 20px;
    color: var(--gray-300);
    font-size: .93rem;
    transition: background .15s, color .15s;
    text-decoration: none;
}
.sidebar-nav li a:hover,
.sidebar-nav li a.active {
    background: var(--gray-800);
    color: #fff;
}
.sidebar-nav li a.active { border-left: 3px solid var(--primary); padding-left: 17px; }
.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--gray-700);
    font-size: .82rem;
    color: var(--gray-500);
}

/* ---------- Main Content ---------- */
.main {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
}
.topbar {
    height: var(--topbar-height);
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px;
    position: sticky; top: 0; z-index: 50;
}
.topbar-left { font-weight: 600; font-size: 1.05rem; }
.topbar-right { display: flex; align-items: center; gap: 16px; font-size: .9rem; }
.topbar-right .merchant-name { color: var(--gray-600); }
.content { padding: 24px; }

/* ---------- Flash Messages ---------- */
.flash-container { margin-bottom: 20px; }
.flash {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: .9rem;
    margin-bottom: 8px;
    display: flex; align-items: center; gap: 8px;
    cursor: pointer;
}
.flash.success { background: var(--success-light); color: #065f46; border: 1px solid #a7f3d0; }
.flash.error   { background: var(--danger-light);  color: #991b1b; border: 1px solid #fecaca; }
.flash.warning { background: var(--warning-light); color: #92400e; border: 1px solid #fde68a; }
.flash.info    { background: var(--info-light);    color: #1e40af; border: 1px solid #bfdbfe; }

/* ---------- Cards ---------- */
.card {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}
.card-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 16px;
}
.card-header h2, .card-header h3 { font-size: 1.1rem; font-weight: 600; }

/* ---------- Stat Cards Row ---------- */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: #fff; border: 1px solid var(--gray-200);
    border-radius: var(--radius); box-shadow: var(--shadow);
    padding: 20px;
}
.stat-card .stat-label { font-size: .82rem; color: var(--gray-500); margin-bottom: 6px; }
.stat-card .stat-value { font-size: 1.8rem; font-weight: 700; color: var(--gray-800); }
.stat-card .stat-icon {
    float: right; width: 40px; height: 40px;
    border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
}
.stat-icon.blue   { background: var(--info-light);    color: var(--info); }
.stat-icon.green  { background: var(--success-light); color: var(--success); }
.stat-icon.amber  { background: var(--warning-light); color: var(--warning); }
.stat-icon.purple { background: var(--primary-light); color: var(--primary); }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }
table {
    width: 100%; border-collapse: collapse;
    font-size: .9rem;
}
thead { background: var(--gray-50); }
th {
    text-align: left; padding: 10px 14px;
    font-weight: 600; color: var(--gray-600);
    border-bottom: 2px solid var(--gray-200);
    white-space: nowrap;
}
td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}
tr:hover td { background: var(--gray-50); }

/* ---------- Badges ---------- */
.badge {
    display: inline-block; padding: 3px 10px;
    border-radius: 20px; font-size: .78rem; font-weight: 500;
    white-space: nowrap;
}
.badge.discount { background: var(--info-light);    color: #1e40af; }
.badge.cash     { background: var(--success-light); color: #065f46; }
.badge.free     { background: var(--warning-light); color: #92400e; }
.badge.active   { background: var(--success-light); color: #065f46; }
.badge.inactive { background: var(--gray-200);      color: var(--gray-500); }
.badge.claimed  { background: var(--warning-light); color: #92400e; }
.badge.used     { background: var(--success-light); color: #065f46; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 16px; font-size: .88rem; font-weight: 500;
    border: 1px solid transparent; border-radius: var(--radius);
    cursor: pointer; transition: all .15s; white-space: nowrap;
    text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #4338ca; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #d97706; }
.btn-danger  { background: var(--danger);  color: #fff; }
.btn-danger:hover  { background: #dc2626; }
.btn-outline { background: #fff; color: var(--gray-600); border-color: var(--gray-300); }
.btn-outline:hover { background: var(--gray-50); }
.btn-sm { padding: 5px 10px; font-size: .8rem; }

/* ---------- Forms ---------- */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block; margin-bottom: 5px;
    font-size: .88rem; font-weight: 500; color: var(--gray-700);
}
.form-control {
    width: 100%; padding: 8px 12px;
    font-size: .9rem; border: 1px solid var(--gray-300);
    border-radius: var(--radius); outline: none;
    transition: border-color .15s;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
textarea.form-control { resize: vertical; min-height: 80px; }
select.form-control { cursor: pointer; }
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}
.form-hint { font-size: .78rem; color: var(--gray-400); margin-top: 3px; }

/* ---------- Chart Grid ---------- */
.chart-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.chart-grid .card { margin-bottom: 0; }
.chart-grid .full-width { grid-column: 1 / -1; }
canvas { max-height: 320px; }

/* ---------- Filter Bar ---------- */
.filter-bar {
    display: flex; flex-wrap: wrap; gap: 10px;
    align-items: flex-end; margin-bottom: 16px;
}
.filter-bar .form-group { margin-bottom: 0; }
.filter-bar .form-control { width: auto; min-width: 140px; }

/* ---------- Pagination ---------- */
.pagination {
    display: flex; gap: 6px; margin-top: 16px; justify-content: center;
}
.pagination a, .pagination span {
    padding: 6px 12px; border: 1px solid var(--gray-200);
    border-radius: var(--radius); font-size: .88rem; color: var(--gray-600);
    text-decoration: none;
}
.pagination a:hover { background: var(--primary-light); color: var(--primary); }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- Login Page ---------- */
.login-page {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin-left: 0;
}
.login-card {
    background: #fff; border-radius: 12px; box-shadow: 0 20px 60px rgba(0,0,0,.15);
    padding: 40px; width: 100%; max-width: 400px;
}
.login-card h1 { font-size: 1.4rem; text-align: center; margin-bottom: 8px; }
.login-card .subtitle { text-align: center; color: var(--gray-500); font-size: .9rem; margin-bottom: 28px; }
.login-card .btn { width: 100%; justify-content: center; padding: 10px; font-size: 1rem; }

/* ---------- Progress Bar ---------- */
.progress-bar-wrap {
    width: 100%; height: 6px; background: var(--gray-200);
    border-radius: 3px; overflow: hidden;
}
.progress-bar-fill {
    height: 100%; border-radius: 3px;
    background: var(--primary); transition: width .3s;
}
.progress-bar-fill.warning { background: var(--warning); }
.progress-bar-fill.danger  { background: var(--danger); }

/* ---------- Inline code (tag UID) ---------- */
code.tag-uid {
    background: var(--gray-100); padding: 2px 8px;
    border-radius: 4px; font-family: "SF Mono", "Fira Code", monospace;
    font-size: .82rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .main { margin-left: 0; }
    .chart-grid { grid-template-columns: 1fr; }
    .stat-grid { grid-template-columns: repeat(2, 1fr); }
}