/* CSS Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #dc2626;
    --danger-dark: #b91c1c;
    --success: #16a34a;
    --warning: #d97706;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --radius: 8px;
    --radius-lg: 12px;
}

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--primary);
    color: var(--white);
    box-shadow: var(--shadow);
}

.header h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

.logo-link {
    color: inherit;
    text-decoration: none;
}

.logo-link:hover {
    opacity: 0.9;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius);
    transition: background 0.2s;
}

.icon-btn:hover {
    background: rgba(255,255,255,0.1);
}

/* Menu */
.menu {
    position: fixed;
    top: 56px; /* Height of header */
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius) var(--radius);
    min-width: 200px;
    max-height: calc(100vh - 56px);
    overflow-y: auto;
    z-index: 99;
}

.menu.hidden {
    display: none;
}

.menu-item {
    display: block;
    padding: 0.875rem 1rem;
    color: var(--gray-700);
    text-decoration: none;
    transition: background 0.2s;
}

.menu-item:hover {
    background: var(--gray-100);
}

.menu-item.active {
    color: var(--primary);
    font-weight: 500;
}

.menu hr {
    border: none;
    border-top: 1px solid var(--gray-200);
    margin: 0.5rem 0;
}

.sync-status {
    display: block;
    padding: 0.25rem 1rem 0.5rem;
    font-size: 0.75rem;
    color: var(--success);
}

.sync-status.hidden {
    display: none;
}

/* Search Bar */
.search-bar {
    padding: 0.75rem 1rem;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
}

.search-bar input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Main Content */
#content {
    padding: 1rem;
    padding-bottom: 2rem;
}

.view {
    display: none;
}

.view.active {
    display: block;
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.view-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-700);
}

/* Buttons */
.primary-btn {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 0.625rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

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

.secondary-btn {
    background: var(--white);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
    padding: 0.625rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.secondary-btn:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.secondary-btn.danger {
    color: var(--danger);
    border-color: var(--danger);
}

.secondary-btn.danger:hover {
    background: #fef2f2;
}

/* Items Grid */
.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.item-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.item-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.item-card-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    background: var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    font-size: 2rem;
}

.item-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.item-card-content {
    padding: 0.75rem;
}

.item-card-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--gray-800);
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-card-location {
    font-size: 0.75rem;
    color: var(--gray-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Containers List */
.containers-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.container-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1rem;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.container-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.container-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.container-card-name {
    font-weight: 600;
    color: var(--gray-800);
}

.container-card-type {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    background: var(--gray-100);
    border-radius: 999px;
    color: var(--gray-600);
}

.container-card-location {
    font-size: 0.875rem;
    color: var(--gray-600);
}

.container-card-count {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 0.5rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--gray-500);
}

.empty-state.hidden {
    display: none;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: 1000;
    overflow-y: auto;
}

.modal.hidden {
    display: none;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    background: var(--white);
    z-index: 1;
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-500);
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
}

.close-btn:hover {
    color: var(--gray-700);
}

/* Forms */
.form-group {
    padding: 0 1rem;
    margin-bottom: 1rem;
}

.form-group:first-of-type {
    margin-top: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.375rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    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);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 60px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem;
    border-top: 1px solid var(--gray-200);
    position: sticky;
    bottom: 0;
    background: var(--white);
}

/* Photo Input */
.photo-input {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.photo-preview {
    width: 100%;
    height: 150px;
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    overflow: hidden;
    background: var(--gray-50);
}

.photo-preview img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.photo-preview.has-photo {
    border-style: solid;
    border-color: var(--gray-200);
}

.photo-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.photo-buttons button {
    flex: 1;
    min-width: 100px;
}

/* View Item/Container Content */
.view-item-content,
.view-container-content {
    padding: 1rem;
}

.view-item-image {
    width: 100%;
    max-height: 250px;
    object-fit: contain;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    background: var(--gray-100);
}

.view-item-content .detail-row,
.view-container-content .detail-row {
    margin-bottom: 0.75rem;
}

.detail-label {
    font-size: 0.75rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.125rem;
}

.detail-value {
    color: var(--gray-800);
}

.detail-value.location-link {
    color: var(--primary);
    cursor: pointer;
}

.detail-value.location-link:hover {
    text-decoration: underline;
}

/* Items in container list */
.container-items-list {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}

.container-items-list h4 {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: 0.5rem;
}

.container-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.2s;
}

.container-item:hover {
    background: var(--gray-100);
}

.container-item-thumb {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    background: var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    font-size: 1rem;
    overflow: hidden;
}

.container-item-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.container-item-name {
    font-size: 0.875rem;
    color: var(--gray-700);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gray-800);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    animation: slideUp 0.3s ease;
}

.toast.hidden {
    display: none;
}

.toast.success {
    background: var(--success);
}

.toast.error {
    background: var(--danger);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

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

/* Responsive adjustments for larger screens */
@media (min-width: 640px) {
    .items-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }

    .item-card-image {
        height: 140px;
    }
}

@media (min-width: 768px) {
    .header {
        padding: 1rem 2rem;
    }

    #content {
        padding: 1.5rem 2rem;
    }

    .items-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .modal-content {
        max-width: 600px;
    }
}

/* Auth Bar */
.auth-bar {
    background: var(--gray-50);
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    border-bottom: 1px solid var(--gray-200);
    font-size: 0.875rem;
}

.auth-bar.hidden {
    display: none;
}

.auth-loading {
    color: var(--gray-500);
}

.auth-logged-out,
.auth-logged-in {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.auth-logged-out.hidden,
.auth-logged-in.hidden {
    display: none;
}

.auth-btn {
    background: var(--white);
    border: 1px solid var(--gray-300);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    cursor: pointer;
    color: var(--gray-700);
    transition: background 0.2s, border-color 0.2s;
}

.auth-btn:hover {
    background: var(--gray-100);
    border-color: var(--gray-400);
}

.auth-btn-small {
    background: transparent;
    border: none;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    color: var(--gray-500);
    cursor: pointer;
}

.auth-btn-small:hover {
    color: var(--gray-700);
    text-decoration: underline;
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
}

.user-name {
    color: var(--gray-700);
    font-size: 0.875rem;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Badge for menu items */
.badge {
    background: var(--danger);
    color: var(--white);
    font-size: 0.7rem;
    padding: 0.125rem 0.4rem;
    border-radius: 999px;
    margin-left: 0.5rem;
    font-weight: 600;
}

.badge.hidden {
    display: none;
}

/* Sign-in prompt */
.sign-in-prompt {
    text-align: center;
    padding: 3rem 1.5rem;
    max-width: 400px;
    margin: 0 auto;
}

.sign-in-prompt h2 {
    color: var(--gray-800);
    margin-bottom: 0.75rem;
}

.sign-in-prompt p {
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

.sign-in-prompt .large {
    padding: 0.875rem 2rem;
    font-size: 1rem;
}

.sign-in-note {
    font-size: 0.8rem;
    color: var(--gray-500);
    margin-top: 1.5rem;
}

/* Form help text */
.form-help {
    font-size: 0.8rem;
    color: var(--gray-500);
    padding: 0 1rem;
    margin-bottom: 1rem;
}

.form-help.hidden {
    display: none;
}

/* Checked out status indicator */
.item-card-status {
    font-size: 0.7rem;
    padding: 0.125rem 0.4rem;
    border-radius: 4px;
    margin-top: 0.25rem;
    display: inline-block;
}

.item-card-status.checked-out {
    background: var(--warning);
    color: var(--white);
}

/* Checked out item card styling */
.item-card.checked-out {
    border: 2px solid var(--warning);
}

.item-card.checked-out .item-card-location {
    color: var(--warning);
    font-weight: 500;
}

/* View item checked out info */
.checked-out-info {
    background: #fef3cd;
    border: 1px solid var(--warning);
    border-radius: var(--radius);
    padding: 0.75rem;
    margin-bottom: 1rem;
}

.checked-out-info .status-label {
    font-weight: 600;
    color: var(--warning);
    margin-bottom: 0.25rem;
}

.checked-out-info .status-details {
    font-size: 0.875rem;
    color: var(--gray-700);
}

/* Small modal */
.modal-small {
    max-width: 400px;
}

/* Print styles for export */
@media print {
    .header,
    .menu,
    .search-bar,
    .primary-btn,
    .modal,
    .auth-bar {
        display: none !important;
    }

    body {
        background: white;
    }

    .item-card,
    .container-card {
        break-inside: avoid;
    }
}