/* ============================================
   RECEIPT GENERATOR - MULTI-TENANT PLATFORM
   Thermal Receipt Style Design
   ============================================ */

:root {
    --primary-color: #1a1a1a;
    --secondary-color: #333333;
    --accent-color: #2563eb;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --background: #f5f5f5;
    --card-bg: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-light: #999999;
    --border-color: #e0e0e0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.2s ease;
    
    /* Receipt specific */
    --receipt-bg: #ffffff;
    --receipt-width: 320px;
    --receipt-font: 'Courier New', Courier, monospace;
}

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

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

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--accent-color);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
}

.nav-menu {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.nav-item {
    padding: 8px 14px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    color: var(--text-secondary);
    border: none;
    background: transparent;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

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

.nav-item.active {
    background: var(--accent-color);
    color: white;
}

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

.business-selector {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.9rem;
    background: var(--card-bg);
    cursor: pointer;
    min-width: 180px;
    font-weight: 500;
}

.business-selector:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: #1d4ed8;
}

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

.btn-success:hover {
    background: #059669;
}

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

.btn-outline:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 12px 24px;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ============================================
   FORMS
   ============================================ */

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

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--card-bg);
    font-family: inherit;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ============================================
   RECEIPT CREATOR PAGE
   ============================================ */

.receipt-creator {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 24px;
    align-items: start;
}

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

.creator-panel {
    position: sticky;
    top: 80px;
}

/* Quick Add Section */
.quick-add {
    background: var(--background);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 16px;
}

.quick-add-row {
    display: grid;
    grid-template-columns: 1fr 80px 100px auto;
    gap: 8px;
    align-items: end;
}

@media (max-width: 600px) {
    .quick-add-row {
        grid-template-columns: 1fr 1fr;
    }
}

.quick-add-row .form-group {
    margin-bottom: 0;
}

.quick-add-row label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Items List */
.items-list {
    margin-top: 16px;
}

.item-entry {
    display: grid;
    grid-template-columns: 1fr 60px 80px 80px auto;
    gap: 8px;
    align-items: center;
    padding: 10px;
    background: var(--background);
    border-radius: var(--radius);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

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

.item-entry input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.item-entry .item-total {
    font-weight: 600;
    text-align: right;
}

.item-entry .remove-btn {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    border: none;
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.item-entry .remove-btn:hover {
    background: var(--danger-color);
    color: white;
}

/* Summary Section */
.receipt-summary {
    background: var(--background);
    border-radius: var(--radius);
    padding: 16px;
    margin-top: 16px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 0.95rem;
}

.summary-row.total {
    font-size: 1.2rem;
    font-weight: 700;
    border-top: 2px dashed var(--border-color);
    margin-top: 8px;
    padding-top: 12px;
}

/* ============================================
   THERMAL RECEIPT PREVIEW
   ============================================ */

.receipt-preview-container {
    background: #e8e8e8;
    padding: 20px;
    border-radius: var(--radius-lg);
    display: flex;
    justify-content: center;
}

.receipt {
    width: var(--receipt-width);
    background: var(--receipt-bg);
    font-family: var(--receipt-font);
    font-size: 12px;
    padding: 16px 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
}

/* Receipt jagged edge effect */
.receipt::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    right: 0;
    height: 10px;
    background: linear-gradient(135deg, var(--receipt-bg) 25%, transparent 25%),
                linear-gradient(225deg, var(--receipt-bg) 25%, transparent 25%),
                linear-gradient(45deg, var(--receipt-bg) 25%, transparent 25%),
                linear-gradient(315deg, var(--receipt-bg) 25%, transparent 25%);
    background-size: 10px 10px;
    background-position: bottom;
}

.receipt-logo {
    display: block;
    max-width: 120px;
    max-height: 60px;
    margin: 0 auto 8px;
    object-fit: contain;
}

.receipt-header {
    text-align: center;
    padding-bottom: 10px;
    border-bottom: 1px dashed #000;
    margin-bottom: 10px;
}

.receipt-header h1 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 4px;
    text-transform: uppercase;
}

.receipt-header p {
    font-size: 11px;
    margin: 2px 0;
}

.receipt-info {
    padding: 8px 0;
    border-bottom: 1px dashed #000;
    margin-bottom: 10px;
    font-size: 11px;
}

.receipt-info-row {
    display: flex;
    justify-content: space-between;
    margin: 2px 0;
}

.receipt-items {
    padding: 8px 0;
    border-bottom: 1px dashed #000;
    margin-bottom: 10px;
}

.receipt-item {
    margin-bottom: 6px;
}

.receipt-item-name {
    font-weight: 500;
    word-break: break-word;
}

.receipt-item-details {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
}

.receipt-item-qty {
    color: var(--text-secondary);
}

.receipt-totals {
    padding: 8px 0;
    border-bottom: 1px dashed #000;
    margin-bottom: 10px;
}

.receipt-total-row {
    display: flex;
    justify-content: space-between;
    padding: 2px 0;
}

.receipt-total-row.grand-total {
    font-weight: 700;
    font-size: 14px;
    padding-top: 6px;
    margin-top: 4px;
    border-top: 1px solid #000;
}

.receipt-footer {
    text-align: center;
    padding-top: 8px;
    font-size: 11px;
}

.receipt-footer p {
    margin: 2px 0;
}

.receipt-thank-you {
    font-weight: 700;
    margin: 8px 0 4px;
}

.receipt-divider {
    border: none;
    border-top: 1px dashed #000;
    margin: 8px 0;
}

/* ============================================
   MODALS
   ============================================ */

.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--background);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--danger-color);
    color: white;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ============================================
   LOGO UPLOAD
   ============================================ */

.logo-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--background);
}

.logo-upload-area:hover {
    border-color: var(--accent-color);
    background: rgba(37, 99, 235, 0.05);
}

.logo-upload-area.has-logo {
    padding: 12px;
}

.logo-preview {
    max-width: 150px;
    max-height: 80px;
    object-fit: contain;
    border-radius: 4px;
}

.logo-upload-placeholder {
    color: var(--text-secondary);
}

.logo-upload-placeholder i {
    font-size: 2rem;
    margin-bottom: 8px;
    display: block;
}

/* ============================================
   RECEIPTS LIST
   ============================================ */

.receipts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.receipt-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.receipt-card:hover {
    box-shadow: var(--shadow);
}

.receipt-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.receipt-number {
    font-weight: 700;
    font-size: 1rem;
}

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

.receipt-customer {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.receipt-amount {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-color);
}

.receipt-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

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

/* ============================================
   EMPTY STATES
   ============================================ */

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.4;
}

.empty-state h3 {
    margin-bottom: 8px;
    color: var(--text-primary);
}

.empty-state p {
    margin-bottom: 16px;
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 12px 16px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 250px;
    animation: slideIn 0.3s ease;
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left-color: var(--danger-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

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

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: stretch;
    }
    
    .nav-menu {
        overflow-x: auto;
        padding-bottom: 8px;
        justify-content: flex-start;
    }
    
    .nav-item {
        white-space: nowrap;
    }
    
    .user-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .receipt-preview-container {
        order: -1;
    }
}

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

@media print {
    body {
        background: white;
    }
    
    .header, .nav-menu, .btn, .creator-panel, .no-print {
        display: none !important;
    }
    
    .receipt-preview-container {
        background: white;
        padding: 0;
    }
    
    .receipt {
        box-shadow: none;
        margin: 0 auto;
    }
    
    .receipt::after {
        display: none;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.text-success { color: var(--success-color); }
.text-danger { color: var(--danger-color); }

.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

.hidden { display: none !important; }