:root {
    --bg: #f2f4f8;
    --card: #ffffff;
    --primary: #1f6feb;
    --primary-dark: #1454b5;
    --danger: #d73a49;
    --danger-dark: #b42330;
    --secondary: #57606a;
    --secondary-dark: #434a53;
    --text: #1f2328;
    --muted: #667085;
    --border: #d0d7de;
}

* {
    box-sizing: border-box;
}

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

h1,
h2,
p {
    margin: 0 0 12px;
}

.auth-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-wrapper {
    width: 100%;
    max-width: 420px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 6px 24px rgba(16, 24, 40, 0.08);
}

.auth-card h1 {
    text-align: center;
    margin-bottom: 18px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 20;
}

.container {
    max-width: 900px;
    margin: 22px auto;
    padding: 0 16px;
    display: grid;
    gap: 16px;
}

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

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.checkbox-row input[type="checkbox"] {
    width: auto;
    margin: 0;
}

label {
    font-weight: 600;
    font-size: 14px;
}

input,
select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    background: #fff;
}

input:focus,
select:focus {
    outline: 2px solid rgba(31, 111, 235, 0.25);
    border-color: var(--primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    border: none;
    border-radius: 8px;
    padding: 10px 14px;
    color: #fff;
    font-weight: 700;
    cursor: pointer;
    transition: 0.2s ease;
}

.btn.primary {
    background: var(--primary);
}

.btn.primary:hover {
    background: var(--primary-dark);
}

.btn.secondary {
    background: var(--secondary);
}

.btn.secondary:hover {
    background: var(--secondary-dark);
}

.btn.danger {
    background: var(--danger);
}

.btn.danger:hover {
    background: var(--danger-dark);
}

.alert {
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 12px;
}

.alert.error {
    background: #ffe3e6;
    color: #9f1239;
}

.alert.success {
    background: #dcfce7;
    color: #166534;
}

.hidden {
    display: none;
}

.preview-body {
    background: #e7ebf2;
}

.preview-container {
    max-width: 980px;
    margin: 20px auto;
    display: grid;
    gap: 20px;
    padding: 0 12px 24px;
}

.actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.print-note {
    margin-top: 6px;
    margin-bottom: 0;
    padding: 8px 10px;
    border-radius: 8px;
    background: #fff3cd;
    border: 1px solid #f1d38a;
    color: #7a5b00;
    font-size: 13px;
}

.sheet {
    background: #fff;
    width: 216mm;
    height: 279mm;
    margin: 0 auto;
    padding: 8mm;
    border: 1px solid #c8ced8;
    box-shadow: 0 3px 16px rgba(15, 23, 42, 0.15);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sheet-grid {
    flex: 1 1 100%;
    width: 100%;
    height: 100%;
    min-height: 0;
    display: grid;
    gap: 2mm;
    align-content: stretch;
}

.cell {
    width: 100%;
    height: 100%;
    min-width: 0;
    min-height: 0;
    border: 1px solid #d7dbe2;
    border-radius: 6px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
}

.cell img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    display: block;
}

.empty-cell {
    visibility: hidden;
}

.page-label {
    width: 216mm;
    margin: 6px auto 0;
    text-align: center;
    color: var(--muted);
    font-size: 13px;
}

@media (max-width: 900px) {
    .sheet {
        width: 100%;
        height: 80vh;
        padding: 10px;
    }

    .page-label {
        width: 100%;
    }
}

@page {
    size: auto;
    margin: 0;
}

@media print {
    body {
        margin: 0;
        padding: 0;
        background: #fff;
    }

    .no-print,
    .topbar,
    .actions,
    .btn,
    form,
    nav,
    header,
    footer {
        display: none !important;
    }

    .preview-container {
        margin: 0;
        padding: 0;
        gap: 0;
    }

    .sheet {
        width: 100%;
        height: 100vh;
        border: none;
        box-shadow: none;
        margin: 0;
        padding: 7mm;
        page-break-after: always;
        overflow: hidden;
    }

    .sheet:last-child {
        page-break-after: auto;
    }
}