:root {
    --primary-color: #1976d2;
    --primary-dark: #1565c0;
    --primary-light: #42a5f5;
    --secondary-color: #424242;
    --success-color: #2e7d32;
    --danger-color: #c62828;
    --warning-color: #f57c00;
    --background: #f5f5f5;
    --surface: #ffffff;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #e0e0e0;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.15);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.navbar {
    background: var(--surface);
    box-shadow: var(--shadow);
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-brand a {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.9rem;
    transition: background 0.2s, color 0.2s;
}

.nav-link:hover {
    background: var(--background);
    color: var(--primary-color);
}

.nav-admin {
    color: var(--warning-color);
}

.nav-logout {
    color: var(--danger-color);
}

.nav-settings {
    color: var(--primary-color);
}

.nav-user {
    padding: 8px 16px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-left: 1px solid var(--border-color);
    margin-left: 8px;
}

.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
    min-height: calc(100vh - 64px - 60px);
}

.footer {
    background: var(--surface);
    padding: 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
}

.flash-messages {
    margin-bottom: 20px;
}

.flash-message {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.flash-success {
    background: #e8f5e9;
    color: var(--success-color);
    border: 1px solid #a5d6a7;
}

.flash-error {
    background: #ffebee;
    color: var(--danger-color);
    border: 1px solid #ef9a9a;
}

.flash-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: inherit;
    padding: 0 4px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    gap: 8px;
}

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

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

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

.btn-secondary:hover {
    background: #616161;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

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

.btn-danger:hover {
    background: #b71c1c;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

.btn-block {
    width: 100%;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    font-size: 0.95rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--surface);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.checkbox-group {
    margin-top: 8px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
}

.error-message {
    color: var(--danger-color);
    font-size: 0.85rem;
    margin-top: 6px;
}

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 64px - 80px);
    padding: 24px;
}

.login-card {
    background: var(--surface);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

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

.login-header h1 {
    color: var(--primary-color);
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.dashboard-container {
    padding: 20px 0;
}

.dashboard-header {
    text-align: center;
    margin-bottom: 40px;
}

.dashboard-header h1 {
    color: var(--primary-color);
    margin-bottom: 12px;
}

.dashboard-subtitle {
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.tools-section h2 {
    margin-bottom: 24px;
    color: var(--text-primary);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.tool-card {
    background: var(--surface);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 28px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.tool-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
}

.tool-card h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
}

.tool-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
    line-height: 1.6;
}

.admin-container {
    max-width: 1000px;
    margin: 0 auto;
}

.admin-container h1 {
    margin-bottom: 32px;
    color: var(--primary-color);
}

.users-list-section,
.create-user-section {
    background: var(--surface);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 24px;
}

.users-list-section h2,
.create-user-section h2 {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.table-responsive {
    overflow-x: auto;
}

.users-table {
    width: 100%;
    border-collapse: collapse;
}

.users-table th,
.users-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.users-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-admin {
    background: #e3f2fd;
    color: var(--primary-color);
}

.badge-user {
    background: #f5f5f5;
    color: var(--text-secondary);
}

.text-muted {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.dispersion-container {
    max-width: 100%;
}

.dispersion-header {
    margin-bottom: 24px;
}

.dispersion-header h1 {
    color: var(--primary-color);
    margin-bottom: 8px;
}

.settings-panels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.settings-panel {
    background: var(--surface);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 20px;
}

.settings-panel h3 {
    margin-bottom: 16px;
    font-size: 1rem;
    color: var(--text-primary);
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
}

.settings-grid .form-group {
    margin-bottom: 0;
}

.settings-grid input {
    text-align: center;
}

.percentage-sum {
    margin-top: 12px;
    text-align: center;
    font-weight: 600;
    color: var(--success-color);
}

.percentage-sum.error {
    color: var(--danger-color);
}

.table-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--surface);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.controls-left,
.controls-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.controls-left input {
    width: 80px;
    padding: 8px;
    text-align: center;
}

.dispersion-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    font-size: 0.9rem;
}

.dispersion-table th,
.dispersion-table td {
    padding: 10px 8px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.dispersion-table th {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
}

.dispersion-table tbody tr:nth-child(even) {
    background: #fafafa;
}

.dispersion-table tbody tr:hover {
    background: #f0f7ff;
}

.dispersion-table input {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.85rem;
    text-align: center;
}

.dispersion-table input[type="text"] {
    text-align: left;
}

.dispersion-table .calculated {
    background: #f5f5f5;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.85rem;
}

.totals-row {
    background: #e3f2fd !important;
    font-weight: 600;
}

.totals-row td {
    font-family: 'Roboto Mono', monospace;
}

/* Πρότυπα */
.templates-panel {
    grid-column: 1 / -1;
}

.templates-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.templates-controls select {
    flex: 1;
    min-width: 200px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
}

.default-info {
    margin-top: 10px;
    padding: 8px 12px;
    background: #e8f5e9;
    border-radius: 4px;
    color: var(--success-color);
    font-size: 0.85rem;
}

/* Λογαριασμοί - Κάθετη διάταξη */
.accounts-panel {
    grid-column: 1 / -1;
}

.accounts-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 16px;
}

.account-row {
    display: grid;
    grid-template-columns: 1fr 2fr 150px auto;
    gap: 12px;
    padding: 12px;
    background: #fafafa;
    border-radius: 8px;
    align-items: end;
}

.account-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.account-field label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.account-field input,
.account-field select {
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
}

.add-account-btn {
    align-self: flex-start;
}

/* Κατηγορίες */
.categories-panel {
    grid-column: 1 / -1;
}

.categories-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 16px;
}

.category-row {
    display: grid;
    grid-template-columns: 2fr 120px auto;
    gap: 12px;
    padding: 12px;
    background: #e3f2fd;
    border-radius: 8px;
    align-items: end;
}

.category-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.category-field label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.category-field input {
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
}

.add-category-btn {
    align-self: flex-start;
}

/* Print Summary */
.print-summary {
    display: none;
}

.summary-cards {
    display: none;
}

.label-container {
    max-width: 800px;
    margin: 0 auto;
}

.label-header {
    margin-bottom: 24px;
}

.label-header h1 {
    color: var(--primary-color);
    margin-bottom: 12px;
}

.template-section,
.label-setup,
.label-form,
.preview-section,
.labels-section,
.instructions {
    background: var(--surface);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 20px;
}

.template-section h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
}

.template-controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.template-select-group {
    display: flex;
    gap: 12px;
    align-items: center;
}

.template-select-group select {
    flex: 1;
    max-width: 300px;
}

.template-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.template-actions .btn {
    font-size: 0.85rem;
    padding: 8px 14px;
}

.label-setup h3,
.label-form h3,
.preview-section h3,
.labels-section h3,
.instructions h3 {
    margin-bottom: 16px;
    color: var(--text-primary);
}

.setup-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.setup-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.setup-grid .form-group {
    margin-bottom: 0;
}

.button-group {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}

#preview-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background: #fafafa;
    border-radius: 8px;
    min-height: 100px;
}

.preview-note {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-style: italic;
    margin-bottom: 12px;
}

#labels-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px 0;
}

.label {
    background: #ffffff;
    border: 1px dashed #ccc;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 5px auto;
}

.barcode-container {
    display: flex;
    justify-content: center;
}

.barcode-container svg {
    max-width: 100%;
}

.item-code-text {
    font-family: 'Roboto Mono', monospace;
    text-align: center;
    margin-top: 4px;
    font-weight: 600;
}

.linkshop-text {
    text-align: center;
    margin-top: 2px;
    color: #333;
}

.instructions ol {
    padding-left: 20px;
}

.instructions li {
    margin-bottom: 8px;
    color: var(--text-secondary);
}

@media print {
    .no-print,
    .navbar,
    .footer,
    .flash-messages,
    .settings-panels,
    .table-controls,
    .dispersion-header,
    .label-header,
    .template-section,
    .label-setup,
    .label-form,
    .preview-section,
    .instructions,
    .labels-section h3 {
        display: none !important;
    }
    
    body {
        background: white;
        padding: 0;
        margin: 0;
    }
    
    .main-content {
        padding: 10px;
        max-width: none;
        min-height: auto;
    }
    
    .dispersion-container {
        width: 100%;
        overflow: visible;
    }
    
    .table-responsive {
        overflow: visible;
    }
    
    .print-table {
        page-break-inside: avoid;
    }
    
    .dispersion-table {
        box-shadow: none;
        font-size: 9pt;
        width: 100%;
        table-layout: fixed;
    }
    
    .dispersion-table th {
        background: #333 !important;
        color: white !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
        padding: 6px 4px;
        font-size: 8pt;
    }
    
    .dispersion-table td {
        padding: 4px 3px;
        font-size: 8pt;
    }
    
    .dispersion-table input {
        border: none;
        background: transparent;
        font-size: 8pt;
        padding: 0;
    }
    
    .totals-row {
        background: #e3f2fd !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    
    .print-summary {
        display: block !important;
        margin-top: 15px;
        page-break-inside: avoid;
    }
    
    .print-totals,
    .print-accounts {
        border: 1px solid #ccc;
        padding: 10px;
        margin-bottom: 10px;
    }
    
    .print-totals h4,
    .print-accounts h4 {
        margin-bottom: 8px;
        font-size: 11pt;
        border-bottom: 1px solid #ccc;
        padding-bottom: 5px;
    }
    
    .summary-grid {
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
    }
    
    .summary-item {
        display: flex;
        justify-content: space-between;
        min-width: 150px;
        font-size: 10pt;
    }
    
    .accounts-summary-grid {
        display: flex;
        flex-direction: column;
        gap: 5px;
    }
    
    .account-summary-item {
        display: grid;
        grid-template-columns: 100px 1fr 100px;
        gap: 10px;
        font-size: 10pt;
        padding: 3px 0;
        border-bottom: 1px dotted #ddd;
    }
    
    .acc-code {
        font-family: monospace;
        font-weight: bold;
    }
    
    .acc-value {
        text-align: right;
        font-weight: bold;
    }
    
    .label {
        border: none !important;
        page-break-inside: avoid;
        display: block;
        margin: 5mm auto;
    }
    
    #labels-container {
        padding: 0;
    }
    
    @page {
        margin: 8mm;
        size: A4 landscape;
    }
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        height: auto;
        padding: 12px;
        gap: 12px;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .table-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .controls-left,
    .controls-right {
        justify-content: center;
    }
    
    .settings-panels {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
}