:root {
    --bg-color: #0f172a;
    --sidebar-bg: #1e293b;
    --card-bg: #334155;
    --border-color: #475569;
    --primary-color: #e11d48;
    --primary-hover: #be123c;
    --accent-color: #2563eb;
    --text-light: #f8fafc;
    --text-muted: #94a3b8;
    --receipt-max-width: 380px;
}

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

html, body {
    width: 100%;
    min-height: 100vh;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-light);
}

body {
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Mobile Tabs Navigation */
.mobile-tabs {
    display: none;
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--sidebar-bg);
    border-bottom: 1px solid var(--border-color);
    width: 100%;
    padding: 8px 12px;
    gap: 8px;
}

.mobile-tab-btn {
    flex: 1;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.mobile-tab-btn.active {
    background-color: var(--accent-color);
    color: #ffffff;
    border-color: var(--accent-color);
}

/* App Layout Container */
.app-container {
    display: flex;
    flex: 1;
    width: 100%;
    min-height: 100vh;
}

/* Control Sidebar */
.sidebar {
    width: 420px;
    min-width: 340px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    overflow-y: auto;
    max-height: 100vh;
}

.sidebar-header h2 {
    font-size: 1.35rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-header h2 i {
    color: var(--primary-color);
}

.sidebar-header p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Mode Switcher Control */
.mode-switcher-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--card-bg);
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.mode-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mode-toggle {
    display: flex;
    gap: 8px;
}

.mode-btn {
    flex: 1;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--sidebar-bg);
    color: var(--text-muted);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.mode-btn.active {
    background-color: #10b981;
    color: #ffffff;
    border-color: #10b981;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn-group {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
    min-height: 44px;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--accent-color);
    color: #fff;
}

.btn-secondary:hover {
    background-color: #1d4ed8;
    transform: translateY(-1px);
}

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

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

.btn-small {
    padding: 8px 14px;
    font-size: 0.82rem;
    background-color: #3b82f6;
    color: white;
    margin-top: 10px;
    width: fit-content;
}

/* Settings Panels & Visibility */
.settings-panel {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.hidden-panel {
    display: none !important;
}

.hidden-receipt {
    display: none !important;
}

details {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 14px;
    transition: background 0.2s;
}

details[open] {
    padding-bottom: 16px;
}

summary {
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    user-select: none;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

summary i {
    color: #f59e0b;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-top: 10px;
}

.form-group label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
}

.form-group input, .form-group select {
    background-color: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    color: var(--text-light);
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
    width: 100%;
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Dynamic Item Editor Row */
.items-editor-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 10px;
}

.item-editor-row {
    display: grid;
    grid-template-columns: 3fr 2fr 2fr auto;
    gap: 6px;
    align-items: center;
    background: var(--sidebar-bg);
    padding: 8px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.item-editor-row.uber-row {
    grid-template-columns: 3fr 2fr 2fr auto;
}

.item-editor-row input {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 6px 8px;
    font-size: 0.82rem;
    border-radius: 4px;
    width: 100%;
}

.btn-delete-item {
    background: none;
    border: none;
    color: #ef4444;
    cursor: pointer;
    padding: 6px;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Preview Main Area */
.preview-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 16px;
    overflow-y: auto;
    background-color: var(--bg-color);
}

.preview-header {
    width: 100%;
    max-width: var(--receipt-max-width);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.badge {
    background-color: #1e293b;
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.status-indicator {
    font-size: 0.8rem;
    color: #10b981;
    font-weight: 500;
}

/* Receipt Paper Wrapper */
.receipt-paper-wrapper {
    width: 100%;
    display: flex;
    justify-content: center;
    padding: 10px 0 30px 0;
}

/* Common Receipt Paper Base */
.receipt-paper {
    width: min(100%, var(--receipt-max-width));
    background-color: #ffffff;
    color: #000000;
    padding: 24px 20px 32px 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    border-radius: 2px;
    position: relative;
    user-select: text;
}

/* Realistic Thermal Receipt Torn Edge at Bottom */
.receipt-paper::after {
    content: "";
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 8px;
    background: linear-gradient(135deg, transparent 75%, #ffffff 75%),
                linear-gradient(225deg, transparent 75%, #ffffff 75%);
    background-size: 12px 12px;
}

/* 1. COSTCO THEME STYLING */
.costco-theme {
    font-family: 'Courier Prime', 'Courier New', Courier, monospace;
    font-size: 15px;
    line-height: 1.35;
    letter-spacing: 0.2px;
}

.receipt-logo {
    text-align: center;
    margin-top: 4px;
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.costco-img-logo {
    width: clamp(200px, 68%, 240px);
    height: auto;
    display: block;
    object-fit: contain;
}

.store-header {
    text-align: center;
    font-weight: 700;
    font-size: 16px;
    line-height: 1.3;
}

.divider {
    width: 100%;
    margin: 10px 0;
}

.divider.dashed {
    border-top: 1px dashed #000;
}

.divider.solid {
    border-top: 1.5px solid #000;
}

.divider.solid-thin {
    border-top: 1px solid #000;
    margin: 14px 0;
}

.member-info {
    font-weight: 700;
    font-size: 15px;
}

.receipt-item-row {
    display: flex;
    justify-content: space-between;
    margin: 4px 0;
    font-size: 14.5px;
    gap: 8px;
}

.receipt-item-left {
    display: flex;
    gap: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.receipt-item-price {
    font-weight: 700;
    white-space: nowrap;
}

.receipt-row {
    display: flex;
    justify-content: space-between;
    font-size: 15px;
    margin: 3px 0;
}

.bold-row {
    font-weight: 700;
    font-size: 17px;
}

.card-details {
    font-size: 14.5px;
    line-height: 1.35;
}

.barcode-container {
    text-align: center;
    padding: 10px 0;
    display: flex;
    justify-content: center;
}

#barcode-svg {
    max-width: 100%;
    height: 55px;
}

.footer-info {
    text-align: center;
    font-size: 14.5px;
}

.footer-info .thank-you {
    margin-top: 8px;
    font-weight: 700;
}

/* 2. UBER EATS THEME STYLING */
.ubereats-theme {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 15px;
    line-height: 1.4;
    color: #000000;
    padding: 24px 22px 28px 22px;
}

/* Uber Header Row */
.uber-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.uber-logo {
    font-size: 26px;
    letter-spacing: -0.5px;
}

.uber-logo .uber-light {
    font-weight: 400;
}

.uber-logo .eats-bold {
    font-weight: 800;
}

.uber-tag {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Black Banner Box */
.uber-banner-box {
    background-color: #000000;
    color: #ffffff;
    padding: 10px 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.uber-cust-name {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 0.2px;
}

.uber-order-code {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 1px;
}

/* Notes Section */
.uber-notes-section {
    font-size: 14.5px;
    line-height: 1.45;
    margin-bottom: 8px;
}

/* Uber Food Items List */
.uber-items-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.uber-item-block {
    display: flex;
    flex-direction: column;
}

.uber-item-main {
    display: flex;
    justify-content: space-between;
    font-weight: 700;
    font-size: 15.5px;
}

.uber-item-main .item-qty-name {
    flex: 1;
}

.uber-item-main .item-price {
    font-weight: 700;
    white-space: nowrap;
}

.uber-item-option {
    padding-left: 20px;
    margin-top: 3px;
    color: #222222;
    font-size: 13.5px;
}

.uber-item-option .opt-label {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 12.5px;
    color: #444444;
}

.uber-item-option .opt-row {
    display: flex;
    justify-content: space-between;
    font-weight: 500;
}

/* Uber Totals */
.uber-totals-section {
    font-size: 15px;
}

.uber-paid-row {
    font-weight: 800;
    font-size: 17.5px;
    margin-top: 6px;
}

/* Uber Timestamps */
.uber-timestamps-section {
    font-size: 14.5px;
    font-weight: 500;
    line-height: 1.5;
}

.uber-timestamps-section span {
    font-weight: 700;
}

/* Uber Footer */
.uber-footer-section {
    text-align: center;
    font-size: 14.5px;
    line-height: 1.45;
}

/* RESPONSIVE BREAKPOINTS */

/* Tablet (1024px and below) */
@media (max-width: 1024px) {
    .sidebar {
        width: 380px;
        min-width: 320px;
        padding: 20px 16px;
    }
}

/* Mobile & Small Screen Devices (880px and below) */
@media (max-width: 880px) {
    .mobile-tabs {
        display: flex;
    }

    .app-container {
        flex-direction: column;
        min-height: auto;
    }

    .sidebar {
        width: 100%;
        max-height: none;
        border-right: none;
        padding: 16px;
        display: flex;
    }

    .sidebar.hidden-mobile {
        display: none !important;
    }

    .preview-area {
        width: 100%;
        padding: 16px;
        display: none;
    }

    .preview-area.active-mobile {
        display: flex !important;
    }

    .form-group input, .form-group select, .item-editor-row input {
        font-size: 16px !important;
    }

    .item-editor-row {
        grid-template-columns: 2.5fr 1.5fr 1.5fr auto;
        gap: 4px;
        padding: 6px;
    }

    .receipt-paper {
        padding: 20px 14px 28px 14px;
        font-size: 13.5px;
    }

    .uber-cust-name, .uber-order-code {
        font-size: 20px;
    }

    .uber-logo {
        font-size: 22px;
    }

    .uber-tag {
        font-size: 18px;
    }
}

/* Print Styles */
@media print {
    body {
        background-color: #fff;
        color: #000;
    }

    .mobile-tabs, .sidebar, .preview-header {
        display: none !important;
    }

    .preview-area {
        padding: 0;
        background: transparent;
        display: block !important;
    }

    .receipt-paper-wrapper {
        padding: 0;
    }

    .receipt-paper {
        box-shadow: none;
        width: 100%;
        max-width: 380px;
        margin: 0 auto;
        padding: 0;
    }

    .receipt-paper::after {
        display: none;
    }
}