/* Workbench Design System */
:root {
    --primary: #007AFF;
    --primary-hover: #0062CC;
    --bg-body: #F2F2F7;
    --bg-card: #FFFFFF;
    --text-main: #1C1C1E;
    --text-sub: #8E8E93;
    --border: #E5E5EA;
    --danger: #FF3B30;
    --success: #34C759;
    --radius: 12px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-body);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    /* App-like feel */
}

/* Utilities */
.hidden {
    display: none !important;
}

.flex-row {
    display: flex;
    align-items: center;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.gap-5 {
    gap: 5px;
}

.gap-10 {
    gap: 10px;
}

.mb-10 {
    margin-bottom: 10px;
}

.mb-20 {
    margin-bottom: 20px;
}

/* 1. Landing View */
.landing-container {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: white;
}

.landing-box {
    text-align: center;
    max-width: 400px;
}

.brand-logo {
    font-size: 4rem;
    margin-bottom: 20px;
}

h1 {
    margin: 0 0 10px 0;
    font-size: 1.8rem;
}

.subtitle {
    color: var(--text-sub);
    margin-bottom: 40px;
}

.file-drop-zone {
    border: 2px dashed var(--border);
    border-radius: 16px;
    padding: 40px;
    cursor: pointer;
    transition: all 0.2s;
}

.file-drop-zone:hover {
    border-color: var(--primary);
    background: rgba(0, 122, 255, 0.02);
}

.file-drop-zone .icon {
    font-size: 2rem;
    margin-bottom: 15px;
}

.file-drop-zone .text {
    font-weight: 600;
    color: var(--primary);
}

.file-drop-zone .subtext {
    font-size: 0.8rem;
    color: var(--text-sub);
    margin-top: 5px;
}

/* 2. Dashboard Layout */
.dashboard-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    height: 60px;
    background: white;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
    flex-shrink: 0;
}

/* Unified Toolbar */
.app-toolbar {
    background: white;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    flex-shrink: 0;
    box-shadow: var(--shadow);
    gap: 20px;
}

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

.toolbar-left {
    flex-shrink: 0;
}

.toolbar-center {
    flex: 1;
    justify-content: center;
}

.toolbar-right {
    flex-shrink: 0;
}

.brand {
    display: flex;
    align-items: center;
}

.brand .logo {
    font-size: 1.5rem;
    margin-right: 8px;
}

.brand .name {
    font-weight: 700;
    font-size: 1.1rem;
}

.toolbar-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-body);
    padding: 8px 12px;
    border-radius: 10px;
}

.toolbar-item i {
    color: var(--text-sub);
    font-size: 0.9rem;
}

.toolbar-item input {
    border: none;
    background: transparent;
    font-size: 0.95rem;
    width: 140px;
    outline: none;
}

.toolbar-item input::placeholder {
    color: var(--text-sub);
}

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--border);
    margin: 0 8px;
}

.file-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-body);
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.file-chip i {
    color: #217346;
}

.chip-badge {
    background: var(--success);
    color: white;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
}

.reset-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: 1px solid var(--border);
    color: var(--text-sub);
    padding: 8px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.reset-btn:hover {
    border-color: var(--danger);
    color: var(--danger);
    background: rgba(255, 59, 48, 0.05);
}

.file-status {
    background: var(--bg-body);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-status .badge {
    background: var(--success);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.7rem;
}

.text-btn {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    font-size: 0.9rem;
}



/* Workspace */
.workspace {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
    background: var(--bg-body);
}

/* File Info Card */
.file-info-card {
    background: white;
    border-radius: 16px;
    padding: 20px 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.file-info-header {
    display: flex;
    align-items: center;
    gap: 16px;
}

.file-icon {
    font-size: 2.5rem;
    color: #10b981;
}

.file-info-main {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

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

.file-name {
    font-size: 0.85rem;
    color: var(--text-sub);
}

.file-info-details {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.detail-label {
    font-size: 0.75rem;
    color: var(--text-sub);
    font-weight: 500;
}

.detail-value {
    font-size: 0.95rem;
    color: var(--text-main);
    font-weight: 600;
}

.file-info-stats {
    display: flex;
    gap: 24px;
    margin-left: auto;
}

.stat-item {
    display: flex;
    align-items: baseline;
    gap: 4px;
    background: var(--bg-body);
    padding: 8px 16px;
    border-radius: 8px;
}

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

.stat-label {
    font-size: 0.85rem;
    color: var(--text-sub);
}

/* Grid Layout 
   Grid vs Flex: Grid is easier for distinct columns, but variable height cards (expanded vs collapsed)
   typically work better in Masonry or just standard top-aligned columns. 
   Simple Grid `align-items: start` ensures cards don't stretch weirdly.
*/
.invoice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 24px;
    max-width: 1400px;
    margin: 0 auto;
    align-items: start;
    /* Important for variable height cards */
}

/* Invoice Card - Responsive Expansion */
.invoice-card {
    background: white;
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow);
    position: relative;
    border: 1px solid transparent;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
}

.invoice-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.invoice-card.error {
    border-color: var(--danger);
}

/* Duplicate Groups - Color Coding */
.invoice-card.duplicate.group-0 {
    background: linear-gradient(135deg, #fff5f5 0%, #ffe8e8 100%);
    border-color: var(--danger);
}

.invoice-card.duplicate.group-1 {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-color: #0ea5e9;
    /* Sky Blue */
}

.invoice-card.duplicate.group-2 {
    background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
    border-color: #f97316;
    /* Orange */
}

.invoice-card.duplicate.group-3 {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border-color: #22c55e;
    /* Green */
}

.invoice-card.duplicate.group-4 {
    background: linear-gradient(135deg, #faf5ff 0%, #f3e8ff 100%);
    border-color: #a855f7;
    /* Purple */
}

.invoice-card.duplicate.group-0::before {
    background: var(--danger);
}

.invoice-card.duplicate.group-1::before {
    background: #0ea5e9;
}

.invoice-card.duplicate.group-2::before {
    background: #f97316;
}

.invoice-card.duplicate.group-3::before {
    background: #22c55e;
}

.invoice-card.duplicate.group-4::before {
    background: #a855f7;
}

.invoice-card.duplicate::before {
    content: "⚠ 重复抬头";
    position: absolute;
    top: 8px;
    right: 50px;
    background: var(--danger);
    color: white;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

/* Card Main Area */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.amount-input-group {
    flex: 1;
}

.currency {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-sub);
    margin-right: 4px;
}

.card-amount {
    font-size: 1.8rem;
    font-weight: 700;
    border: none;
    width: 100%;
    color: var(--text-main);
    background: transparent;
}

.card-amount:focus {
    outline: none;
}

.card-amount::placeholder {
    color: #E5E5EA;
}


/* Searchable Dropdown Styles */
.searchable-select {
    position: relative;
    width: 100%;
}

.search-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.2s;
}

.card-title-input {
    border: none;
    border-bottom: 2px solid var(--border);
    border-radius: 0;
    padding: 10px 4px;
    background: transparent;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
}

.dropdown-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-top: 4px;
    max-height: 250px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s;
}

.searchable-select.active .dropdown-list {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-option {
    padding: 10px 12px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-main);
    border-bottom: 1px solid var(--bg-body);
}

.dropdown-option:last-child {
    border-bottom: none;
}

.dropdown-option:hover {
    background: var(--bg-body);
    color: var(--primary);
}

.dropdown-option.hidden {
    display: none;
}

.action-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: var(--text-sub);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-btn:hover {
    background: var(--bg-body);
    color: var(--text-main);
}

.action-btn.delete:hover {
    background: #fee;
    color: var(--danger);
}

.card-title {
    width: 100%;
    border: none;
    border-bottom: 2px solid var(--border);
    padding: 10px 4px;
    font-size: 0.95rem;
    background: transparent;
    cursor: pointer;
    appearance: none;
    -webkit-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='%238E8E93' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 4px center;
    padding-right: 24px;
}

.card-title:focus {
    outline: none;
    border-bottom-color: var(--primary);
}

/* Toolbar select styling */
.toolbar-item select {
    border: none;
    background: transparent;
    font-size: 0.95rem;
    min-width: 120px;
    outline: none;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%238E8E93' d='M5 7L1 3h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0 center;
    padding-right: 16px;
}

/* Inline Settings Grid */
.card-inline-settings {
    display: grid;
    grid-template-columns: 1fr 1.5fr auto;
    gap: 15px;
    align-items: end;
    margin-top: 16px;
    margin-bottom: 12px;
}

.inline-setting-row label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-sub);
    margin-bottom: 4px;
}

.setting-input {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 8px;
    font-size: 0.9rem;
}

.range-inputs {
    display: flex;
    align-items: center;
    gap: 4px;
}

.setting-input.small {
    text-align: center;
}

.checkbox-row {
    display: flex;
    align-items: flex-end;
    padding-bottom: 6px;
}

/* Expansion Trigger */
.card-expansion-trigger {
    border-top: 1px solid #f2f2f7;
    padding-top: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.card-expansion-trigger:hover {
    opacity: 0.7;
}

.expansion-summary {
    font-size: 0.8rem;
    color: var(--text-sub);
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.tag-default {
    background: #f2f2f7;
    color: var(--text-sub);
    padding: 2px 6px;
    border-radius: 4px;
}

.tag-cat {
    background: #eaf2ff;
    color: var(--primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 500;
}

.tag-more {
    background: #f2f2f7;
    color: var(--text-sub);
    padding: 2px 6px;
    border-radius: 4px;
}

.tag-warning {
    background: #fef2f2;
    color: var(--danger);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 500;
}

.expansion-icon {
    color: #ccc;
    transition: transform 0.3s;
}

/* Expanded Area */
.card-expanded-area {
    margin-top: 12px;
    border-top: 1px dashed var(--border);
    padding-top: 12px;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Category Grid Layout */
.category-grid-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    align-items: start;
}

.inline-cat-group {
    /* margin-bottom: 8px; removed in grid context */
    border-radius: 8px;
    background: #fafafa;
    /* overflow: hidden; causes clipping of absolute tooltips if we used them */
}

.inline-cat-header {
    padding: 6px 8px;
    /* Compact padding */
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: background 0.1s;
    font-size: 0.85rem;
}

.inline-cat-header:hover {
    background: #f0f0f5;
}

.inline-cat-items {
    padding: 8px;
    /* show single column of items in narrow grid cell? 
       or keep 2 columns? 
       In a 1/3 card width, 2 columns of items might be tight.
       Let's stick to 1 column or flex-wrap in sparse space.
    */
    display: grid;
    grid-template-columns: 1fr;
    /* Single column stack for items in small cell */
    gap: 4px;
    background: white;
    border-top: 1px solid #eee;
    max-height: 200px;
    overflow-y: auto;
}

.inline-item-row {
    display: flex;
    align-items: baseline;
    gap: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    white-space: normal;
    line-height: 1.4;
    padding: 2px 0;
}

/* Add Card */
.invoice-card.add-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    min-height: 200px;
    border: 2px dashed var(--border);
    box-shadow: none;
    transition: all 0.2s;
}

.invoice-card.add-card:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 122, 255, 0.02);
}

.add-card .plus-icon {
    font-size: 2rem;
    margin-bottom: 10px;
}

/* Footer */
.app-footer {
    background: white;
    border-top: 1px solid var(--border);
    padding: 16px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.footer-actions {
    display: flex;
    align-items: center;
    gap: 24px;
}

.layout-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: var(--bg-body);
    border-radius: 8px;
}

.toggle-label {
    font-size: 0.9rem;
    color: var(--text-sub);
    font-weight: 500;
}

.toggle-option {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.9rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: background 0.2s;
}

.toggle-option:hover {
    background: white;
}

.toggle-option input[type="radio"] {
    accent-color: var(--primary);
}

.generate-btn {
    background: var(--primary);
    color: white;
    padding: 12px 30px;
    border-radius: 30px;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.generate-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.generate-btn:not(:disabled):hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

/* Modals (Still keeping site manager) */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

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

.modal-card {
    background: white;
    width: 600px;
    max-width: 90%;
    max-height: 85vh;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
}

.modal-card.small {
    width: 400px;
}

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

.modal-body {
    padding: 20px;
    overflow-y: auto;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.primary-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
}

.secondary-btn {
    background: var(--bg-body);
    color: var(--text-main);
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
}

.shrink {
    flex-shrink: 0;
}

.flex-1 {
    flex: 1;
}

/* Site Manager Styles */
.section-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-sub);
    font-weight: 600;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.site-list-scrollable {
    max-height: 400px;
    overflow-y: auto;
}

.site-card {
    background: var(--bg-body);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
}

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

.site-name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-main);
}

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

.site-headers {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.header-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    border: 1px solid var(--border);
}

.header-tag .remove-btn {
    background: none;
    border: none;
    color: var(--text-sub);
    cursor: pointer;
    padding: 0;
    font-size: 0.9rem;
    line-height: 1;
}

.header-tag .remove-btn:hover {
    color: var(--danger);
}

.add-header-row {
    display: flex;
    gap: 8px;
}

.add-header-row input {
    flex: 1;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 0.85rem;
}

.add-header-btn {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 6px 12px;
    cursor: pointer;
    font-size: 0.85rem;
}

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

.empty-headers {
    color: var(--text-sub);
    font-size: 0.85rem;
    font-style: italic;
    margin-bottom: 12px;
}

/* ============================================
   RESPONSIVE DESIGN - Mobile Optimization
   ============================================ */

/* Tablet and below */
@media (max-width: 1024px) {
    .app-toolbar {
        padding: 10px 16px;
        gap: 12px;
    }

    .toolbar-item input {
        width: 120px;
    }

    .context-bar {
        flex-wrap: wrap;
        gap: 12px;
        padding: 12px 16px;
    }

    .context-bar input {
        width: 160px;
    }

    .file-info-card {
        padding: 16px;
    }

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

/* Mobile devices */
@media (max-width: 768px) {

    /* Unified Toolbar - Mobile */
    .app-toolbar {
        flex-direction: column;
        padding: 12px 16px;
        gap: 12px;
    }

    .toolbar-left,
    .toolbar-center,
    .toolbar-right {
        width: 100%;
        justify-content: center;
    }

    .toolbar-center {
        flex-direction: column;
        gap: 10px;
    }

    .toolbar-item {
        width: 100%;
        justify-content: center;
    }

    .toolbar-item input {
        flex: 1;
        width: auto;
    }

    .toolbar-divider {
        display: none;
    }

    .toolbar-right {
        flex-wrap: wrap;
        gap: 10px;
    }

    .file-chip {
        flex: 1;
        justify-content: center;
    }

    .reset-btn {
        flex: 1;
        justify-content: center;
    }

    /* Header adjustments */
    .app-header {
        height: auto;
        flex-direction: column;
        padding: 12px 16px;
        gap: 10px;
    }

    .brand {
        display: flex;
        align-items: center;
    }

    .brand .name {
        font-size: 1rem;
    }

    .file-status {
        width: 100%;
        justify-content: center;
        padding: 8px 12px;
    }

    /* Context bar - stack vertically */
    .context-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
        padding: 12px 16px;
    }

    .context-item {
        width: 100%;
    }

    .context-bar input {
        width: 100%;
    }

    .context-divider {
        display: none;
    }

    .context-spacer {
        display: none;
    }

    /* File info card */
    .file-info-card {
        padding: 12px;
        margin-bottom: 16px;
    }

    .file-info-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .file-icon {
        font-size: 1.5rem;
    }

    .file-title {
        font-size: 1rem;
    }

    .file-info-details {
        flex-direction: column;
        gap: 6px;
    }

    .file-info-stats {
        flex-direction: row;
        gap: 24px;
    }

    /* Workspace */
    .workspace {
        padding: 12px;
    }

    /* Invoice cards */
    .invoice-card {
        padding: 12px;
    }

    .card-header-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .category-grid-container {
        grid-template-columns: 1fr;
    }

    .inline-cat-group {
        max-height: 200px;
    }

    /* Footer */
    .app-footer {
        flex-direction: column;
        gap: 12px;
        padding: 12px 16px;
    }

    .footer-actions {
        width: 100%;
        flex-direction: column;
        gap: 12px;
    }

    .layout-toggle {
        width: 100%;
        justify-content: center;
    }

    .generate-btn {
        width: 100%;
    }

    /* Modals */
    .modal-card {
        width: 95%;
        max-width: none;
        margin: 10px;
        max-height: 90vh;
    }

    .modal-header h3 {
        font-size: 1rem;
    }

    .site-card {
        padding: 12px;
    }

    .site-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .site-headers {
        flex-direction: column;
    }

    .add-header-row {
        flex-direction: column;
    }

    .add-header-row input {
        width: 100%;
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    .landing-box {
        padding: 20px;
        max-width: 100%;
    }

    .landing-box h1 {
        font-size: 1.4rem;
    }

    .brand-logo {
        font-size: 3rem;
    }

    .file-drop-zone {
        padding: 24px;
    }

    .file-info-stats {
        flex-direction: column;
        gap: 12px;
    }

    .stat-item {
        flex-direction: row;
        gap: 8px;
    }

    .stat-value {
        font-size: 1.2rem;
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {

    .icon-btn,
    .text-btn,
    .primary-btn,
    .generate-btn {
        min-height: 44px;
        min-width: 44px;
    }

    .toggle-option {
        padding: 8px 12px;
    }

    input[type="text"],
    input[type="checkbox"] {
        min-height: 44px;
    }
}

/* Validation Errors */
.input-error {
    border-color: #ff4d4f !important;
    background-color: #fff1f0 !important;
}

.searchable-select.error .search-input {
    border-color: #ff4d4f !important;
    background-color: #fff1f0 !important;
}