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

:root {
    --primary: #0066cc;
    --primary-hover: #0052a3;
    --success: #28a745;
    --success-bg: #e8f5e9;
    --danger: #dc3545;
    --danger-bg: #ffebee;
    --text: #212529;
    --text-secondary: #495057;
    --text-muted: #6c757d;
    --bg: #f5f7fa;
    --card: #ffffff;
    --border: #dee2e6;
    --input-border: #ced4da;
    --input-focus: #0066cc;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
}

.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
}

.logo svg {
    color: var(--primary);
}

/* Main */
.main {
    flex: 1;
    padding: 24px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
}

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

/* Card */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    background: #fafbfc;
}

.card-header h2 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text);
}

.card-body {
    padding: 20px;
}

/* Form */
.form-group {
    margin-bottom: 20px;
}

.form-group:last-of-type {
    margin-bottom: 24px;
}

.form-group > label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 500px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.field-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--primary);
    margin-top: 6px;
}

/* Inputs */
select,
input[type="number"] {
    width: 100%;
    padding: 10px 12px;
    font-size: 0.875rem;
    font-family: inherit;
    border: 1px solid var(--input-border);
    border-radius: 6px;
    background: var(--card);
    color: var(--text);
    transition: border-color 0.15s, box-shadow 0.15s;
}

select:hover,
input[type="number"]:hover {
    border-color: #adb5bd;
}

select:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236c757d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

.input-wrapper {
    position: relative;
}

.input-wrapper input {
    padding-right: 36px;
}

.input-suffix {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.875rem;
    color: var(--text-muted);
    pointer-events: none;
}

/* Checkbox Label */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: 500;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* Button Group */
.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.btn-option {
    flex: 1;
    min-width: 70px;
    cursor: pointer;
}

.btn-option input {
    display: none;
}

.btn-option span {
    display: block;
    padding: 10px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    text-align: center;
    background: var(--card);
    border: 1px solid var(--input-border);
    border-radius: 6px;
    color: var(--text-secondary);
    transition: all 0.15s;
}

.btn-option:hover span {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-option input:checked + span {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* Primary Button */
.btn-primary {
    width: 100%;
    padding: 12px 20px;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    color: white;
    background: var(--primary);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.15s;
}

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

/* Results Card */
.results-card {
    animation: slideIn 0.2s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Result Boxes */
.result-boxes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

@media (max-width: 500px) {
    .result-boxes {
        grid-template-columns: 1fr;
    }
}

.result-box {
    padding: 16px;
    background: #f8f9fa;
    border-radius: 6px;
    text-align: center;
}

.result-box.success {
    background: var(--success-bg);
}

.result-box.danger {
    background: var(--danger-bg);
}

.result-box-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.result-box.success .result-box-label {
    color: var(--success);
}

.result-box.danger .result-box-label {
    color: var(--danger);
}

.result-box-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}

.result-box.success .result-box-value {
    color: var(--success);
}

.result-box.danger .result-box-value {
    color: var(--danger);
}

.result-box.highlight {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    border: 2px solid var(--primary);
    animation: pulse 2s ease-in-out infinite;
}

.result-box.highlight .result-box-label {
    color: var(--primary);
}

.result-box.highlight .result-box-value {
    color: var(--primary);
    font-size: 1.5rem;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* Mode toggle özel stili */
.mode-toggle {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.mode-hint {
    display: block;
    margin-top: 6px;
    font-style: italic;
}

/* Table */
.table-wrapper {
    margin-bottom: 20px;
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

.data-table th {
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-muted);
    background: #f8f9fa;
    border-bottom: 1px solid var(--border);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.data-table th:last-child {
    text-align: right;
}

.data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.data-table td:last-child {
    text-align: right;
    font-weight: 600;
    color: var(--text);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table tbody tr:hover {
    background: #f8f9fa;
}

.data-table tfoot tr {
    background: #f8f9fa;
}

.data-table tfoot td {
    border-bottom: none;
    color: var(--text);
}

.data-table .income-row {
    background: var(--success-bg);
}

.data-table .income-row td {
    color: var(--success);
}

.data-table .info-row td {
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 6px 12px;
    background: #f8f9fa;
}

.data-table .positive {
    color: var(--success) !important;
}

.data-table .negative {
    color: var(--danger) !important;
}

/* Chart */
.chart-section {
    margin-bottom: 16px;
}

.chart-container {
    height: 200px;
}

/* Result Footer */
.result-footer {
    text-align: center;
    padding: 12px;
    background: #f8f9fa;
    border-radius: 6px;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.result-footer strong {
    color: var(--text);
}

/* Footer */
.footer {
    padding: 16px 24px;
    text-align: center;
    border-top: 1px solid var(--border);
    background: var(--card);
}

.footer p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ============================================
   TAB NAVIGATION
   ============================================ */

.tab-navigation {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    display: flex;
    gap: 4px;
}

.tab-btn {
    background: none;
    border: none;
    padding: 14px 20px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
    font-family: inherit;
}

.tab-btn:hover {
    color: var(--text);
    background: var(--bg);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ============================================
   BULK UPLOAD
   ============================================ */

.bulk-container {
    max-width: 1400px;
    margin: 0 auto;
}

.upload-card {
    max-width: 600px;
    margin: 0 auto 24px;
}

.upload-zone {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--bg);
}

.upload-zone:hover {
    border-color: var(--primary);
    background: rgba(0, 102, 204, 0.02);
}

.upload-zone.dragover {
    border-color: var(--primary);
    background: rgba(0, 102, 204, 0.05);
}

.upload-icon {
    color: var(--primary);
    margin-bottom: 16px;
}

.upload-text {
    font-size: 0.9375rem;
    color: var(--text);
    margin-bottom: 4px;
}

.upload-link {
    color: var(--primary);
    text-decoration: underline;
    cursor: pointer;
}

.upload-hint {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Progress Bar */
.progress-section {
    margin-top: 20px;
}

.progress-bar {
    height: 8px;
    background: var(--bg);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #0052a3);
    width: 0%;
    transition: width 0.3s;
}

.progress-text {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-align: center;
}

/* ============================================
   SUMMARY CARDS
   ============================================ */

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.summary-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
}

.summary-card.success {
    background: var(--success-bg);
    border-color: var(--success);
}

.summary-card.danger {
    background: var(--danger-bg);
    border-color: var(--danger);
}

.summary-label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.summary-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.summary-card.success .summary-value {
    color: var(--success);
}

.summary-card.danger .summary-value {
    color: var(--danger);
}

/* ============================================
   CONTROLS
   ============================================ */

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

.export-buttons {
    display: flex;
    gap: 8px;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-secondary:hover {
    background: var(--bg);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-secondary svg {
    flex-shrink: 0;
}

/* ============================================
   ORDERS TABLE
   ============================================ */

.orders-table {
    width: 100%;
}

.orders-table th {
    text-align: left;
    font-weight: 600;
}

.orders-table tbody tr {
    cursor: pointer;
    transition: background 0.15s;
}

.orders-table tbody tr:hover {
    background: var(--bg);
}

.orders-table .expandable-row {
    cursor: pointer;
}

.orders-table .expand-icon {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
}

.orders-table .expand-icon.expanded {
    transform: rotate(90deg);
}

.orders-table .detail-row {
    background: var(--bg);
}

.orders-table .detail-row td {
    padding: 20px;
}

.order-details {
    max-width: 800px;
}

.order-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

.detail-item {
    padding: 12px;
    background: var(--card);
    border-radius: 6px;
    border: 1px solid var(--border);
}

.detail-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.detail-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
}

.detail-value.positive {
    color: var(--success);
}

.detail-value.negative {
    color: var(--danger);
}

.deductions-list {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 12px;
}

.deductions-list h4 {
    font-size: 0.875rem;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.deduction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}

.deduction-item:last-child {
    border-bottom: none;
}

.deduction-name {
    color: var(--text-secondary);
}

.deduction-amount {
    font-weight: 600;
    color: var(--text);
}

/* ============================================
   CARD GRID VIEW
   ============================================ */

.orders-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.order-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    transition: all 0.2s;
    cursor: pointer;
}

.order-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.order-card-header {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.order-card-id {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.order-card-product {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.order-card-body {
    margin-bottom: 12px;
}

.order-card-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 0.8125rem;
}

.order-card-label {
    color: var(--text-secondary);
}

.order-card-value {
    font-weight: 600;
    color: var(--text);
}

.order-card-net {
    text-align: center;
    padding: 12px;
    background: var(--success-bg);
    border-radius: 6px;
    margin-bottom: 12px;
}

.order-card-net-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.order-card-net-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--success);
}

.order-card-btn {
    width: 100%;
    padding: 8px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--primary);
    background: white;
    border: 1px solid var(--primary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

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

/* ============================================
   CHARTS
   ============================================ */

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.chart-container {
    min-height: 350px;
}

/* ============================================
   MODAL
   ============================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--card);
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow: auto;
    z-index: 1001;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--bg);
    color: var(--text);
}

.modal-body {
    padding: 20px;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .tab-navigation {
        padding: 0 16px;
    }

    .tab-btn {
        padding: 12px 16px;
        font-size: 0.8125rem;
    }

    .main {
        padding: 16px;
    }

    .summary-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .controls-grid {
        grid-template-columns: 1fr;
    }

    .export-buttons {
        flex-direction: column;
    }

    .btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .orders-grid {
        grid-template-columns: 1fr;
    }

    .charts-grid {
        grid-template-columns: 1fr;
    }

    .orders-table {
        font-size: 0.75rem;
    }

    .orders-table th,
    .orders-table td {
        padding: 8px 4px;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .header,
    .tab-navigation,
    .footer,
    .upload-card,
    .card-header,
    .controls-grid,
    .export-buttons,
    .btn-secondary,
    .order-card-btn,
    .modal-close {
        display: none !important;
    }

    body {
        background: white;
    }

    .card {
        border: none;
        box-shadow: none;
        page-break-inside: avoid;
    }

    .summary-cards {
        page-break-after: avoid;
    }

    .orders-table {
        font-size: 10pt;
    }

    .orders-table .detail-row {
        display: none;
    }
}