:root {
    --bg: #f3f5f9;
    --panel: #ffffff;
    --primary: #1f4ccf;
    --sidebar: #0f1a34;
    --sidebar-text: #dbe5ff;
    --text: #1c2230;
    --muted: #6b7487;
    --border: #e1e6f0;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
}

.login-body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: var(--panel);
    border-radius: 14px;
    padding: 24px;
    border: 1px solid var(--border);
    box-shadow: 0 10px 30px rgba(20, 32, 66, 0.08);
}

.login-card h1 {
    margin: 0 0 8px;
}

.login-card p {
    margin: 0 0 20px;
    color: var(--muted);
}

.login-form {
    display: grid;
    gap: 10px;
}

.login-form input {
    border: 1px solid var(--border);
    border-radius: 8px;
    height: 40px;
    padding: 0 12px;
}

.login-form button {
    margin-top: 6px;
    border: 0;
    border-radius: 8px;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    height: 42px;
    cursor: pointer;
}

.alert-error {
    background: #ffe4e4;
    border: 1px solid #ffb9b9;
    color: #8d1f1f;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 14px;
}

.app-layout {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 250px 1fr;
}

.sidebar {
    background: var(--sidebar);
    color: var(--sidebar-text);
    padding: 18px 14px;
}

.sidebar-header h2 {
    margin-top: 0;
    font-size: 18px;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 18px 0 0;
}

.sidebar li + li {
    margin-top: 8px;
}

.sidebar a {
    display: block;
    text-decoration: none;
    color: var(--sidebar-text);
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 10px 12px;
}

.sidebar a:hover {
    background: rgba(255, 255, 255, 0.12);
}

.sidebar a.active {
    background: rgba(255, 255, 255, 0.22);
    font-weight: 600;
}

.main-content {
    display: grid;
    grid-template-rows: auto 1fr;
}

.topbar {
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    padding: 14px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 10px;
}

.topbar a {
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
}

.content-area {
    padding: 24px;
}

.content-area h1 {
    margin-top: 0;
}

.cards {
    margin-top: 16px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
}

.card h3 {
    margin-top: 0;
}

.muted {
    color: var(--muted);
}

.table-toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin: 12px 0;
}

.table-toolbar select,
.table-toolbar button,
.table-toolbar input {
    height: 34px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0 10px;
    background: #fff;
}

.table-toolbar button {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    cursor: pointer;
}

.column-picker {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 8px 10px;
    min-width: 320px;
}

.column-picker summary {
    cursor: pointer;
    font-weight: 600;
}

.column-picker-search-wrap {
    margin: 10px 0 4px;
}

.column-picker-search {
    width: 100%;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0 10px;
    background: #fff;
}

.column-picker-actions {
    display: flex;
    gap: 8px;
    margin: 10px 0;
}

.column-picker-actions button {
    height: 30px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #f7f9ff;
    color: var(--text);
    padding: 0 10px;
    cursor: pointer;
}

.column-picker-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 6px 10px;
    max-height: 220px;
    overflow: auto;
    padding-right: 4px;
}

.column-option {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}

.table-wrap {
    overflow: auto;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    max-height: calc(100vh - 260px);
}

#salesTable {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

#salesTable th,
#salesTable td {
    border-bottom: 1px solid var(--border);
    padding: 8px 10px;
    white-space: nowrap;
    text-align: left;
}

#salesTable td.text-right {
    text-align: right;
}

#salesTable td.text-center {
    text-align: center;
}

#salesTable th {
    position: sticky;
    top: 0;
    background: #eef2fb;
    z-index: 2;
}

#salesTable th.sortable {
    cursor: grab;
    user-select: none;
}

#salesTable th.sortable.active {
    background: #dde7ff;
}

#salesTable th.sortable.dragging {
    opacity: 0.6;
}

#salesTable .summary-row td {
    background: #f4f7ff;
    border-top: 2px solid #cfd9f7;
    font-weight: 600;
    position: sticky;
    bottom: 0;
    z-index: 3;
}

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

    .sidebar {
        padding-bottom: 10px;
    }
}