:root {
    /* Colors - Dark Theme Default */
    --bg-color: #121212;
    --surface-color: #1E1E1E;
    --surface-color-hover: #2C2C2C;
    --primary-color: #BB86FC; /* Material Purple 200 */
    --primary-variant: #3700B3;
    --secondary-color: #03DAC6; /* Teal 200 */
    --error-color: #CF6679;
    
    /* Text */
    --text-primary: rgba(255, 255, 255, 0.87);
    --text-secondary: rgba(255, 255, 255, 0.60);
    --text-disabled: rgba(255, 255, 255, 0.38);
    
    /* Layout */
    --border-radius: 8px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
}

[data-theme="light"] {
    --bg-color: #f5f5f5;
    --surface-color: #ffffff;
    --surface-color-hover: #e0e0e0;
    --primary-color: #6200EE;
    --primary-variant: #3700B3;
    --secondary-color: #03DAC6;
    --error-color: #B00020;
    
    --text-primary: rgba(0, 0, 0, 0.87);
    --text-secondary: rgba(0, 0, 0, 0.60);
    --text-disabled: rgba(0, 0, 0, 0.38);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: system-ui, -apple-system, 'Segoe UI', Arial, sans-serif;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* App Bar */
.app-bar {
    background-color: var(--surface-color);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-bar h1 {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-primary);
}

.app-bar-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.app-navigation {
    position: absolute;
    top: calc(100% + 8px);
    right: var(--spacing-lg);
    display: none;
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 8px;
    width: min(240px, calc(100vw - 24px));
    background-color: var(--surface-color);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--border-radius);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.45);
    z-index: 120;
}

.app-bar.nav-open .app-navigation {
    display: grid;
}

.app-navigation .icon-btn {
    width: 100%;
    height: 44px;
    justify-content: flex-start;
    gap: 8px;
    border-radius: 6px;
    padding: 0 10px;
    color: var(--text-secondary);
}

.app-navigation .icon-btn::after {
    content: attr(title);
    color: currentColor;
    font-size: 0.85rem;
    line-height: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Buttons */
.icon-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
    min-height: 44px;
    min-width: 44px;
}

.icon-btn svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.icon-btn:hover, .icon-btn.active {
    background-color: rgba(255, 255, 255, 0.08);
}

.btn {
    padding: 10px 16px;
    border: none;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-transform: uppercase;
    transition: background-color 0.2s, box-shadow 0.2s;
    font-family: inherit;
    min-height: 44px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    background-color: #d1b1ff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md);
    flex: 1;
    width: 100%;
}

/* View Header */
.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.view-header h2 {
    font-size: 1.5rem;
    font-weight: 400;
}

/* Cards */
.card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--primary-color);
}

.card-content {
    padding: var(--spacing-md) var(--spacing-lg);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.flex-1 {
    flex: 1;
}

.add-food-form {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.add-food-form .btn {
    height: 48px;
    margin-bottom: var(--spacing-md);
}

.list-add-grid {
    display: grid;
    grid-template-columns: minmax(160px, 1fr) minmax(180px, 1.2fr) minmax(160px, 1fr) auto;
    gap: var(--spacing-md);
    align-items: end;
}

.list-add-grid .form-group,
.list-add-grid .btn {
    margin-bottom: 0;
}

.export-grid {
    display: grid;
    grid-template-columns: minmax(150px, 1fr) minmax(180px, 1.2fr) minmax(120px, 0.8fr) auto;
    gap: var(--spacing-md);
    align-items: end;
}

.export-grid .form-group,
.export-grid .btn {
    margin-bottom: 0;
}

.import-grid {
    display: grid;
    grid-template-columns: minmax(180px, 1fr) auto;
    gap: var(--spacing-md);
    align-items: end;
    margin-bottom: var(--spacing-md);
}

.import-grid .form-group,
.import-grid .btn {
    margin-bottom: 0;
}

.import-textarea {
    min-height: 180px;
    resize: vertical;
}

.import-preview {
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    margin-bottom: var(--spacing-md);
    min-height: 48px;
    padding: 12px;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    background-color: rgba(0, 0, 0, 0.58);
}

.modal-content {
    width: min(460px, 100%);
    max-height: calc(100vh - 32px);
    overflow: auto;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.5);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

.material-input {
    width: 100%;
    padding: 12px;
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.38);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
    min-height: 48px;
}

.material-input:focus {
    border-color: var(--primary-color);
}

.select-wrapper {
    position: relative;
    width: 100%;
}

.material-select {
    width: 100%;
    padding: 12px 36px 12px 12px;
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.38);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    appearance: none;
    outline: none;
    transition: border-color 0.2s;
    min-height: 48px;
}

.select-arrow {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
    font-size: 12px;
}

.material-select:focus {
    border-color: var(--primary-color);
}

.material-select option {
    background-color: var(--surface-color);
    color: var(--text-primary);
}

/* Toggles */
.toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 14px;
    background-color: rgba(255, 255, 255, 0.38);
    border-radius: 14px;
    transition: .4s;
    margin-right: 8px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: -2px;
    bottom: -3px;
    background-color: var(--surface-color-hover);
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    transition: .4s;
}

input:checked + .slider {
    background-color: rgba(187, 134, 252, 0.5);
}

input:checked + .slider:before {
    transform: translateX(20px);
    background-color: var(--primary-color);
}

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

/* Material List */
.material-list {
    list-style: none;
    margin: 0;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
}

.material-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    min-height: 50px;
}

.material-list li:last-child {
    border-bottom: none;
}

.material-list li:hover {
    background-color: rgba(255, 255, 255, 0.04);
}

.empty-message {
    justify-content: center !important;
    color: var(--text-secondary);
    text-align: center;
}

.item-meta {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.stacked-item {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.store-checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 8px 12px;
    margin-top: 8px;
}

.list-item-row {
    gap: 12px;
}

.quantity-control {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
}

.quantity-value {
    min-width: 28px;
    text-align: center;
    font-weight: 700;
}

.quantity-btn {
    width: 36px;
    min-width: 36px;
    height: 36px;
    min-height: 36px;
    padding: 0;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.24);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
}

.quantity-btn:hover {
    border-color: var(--primary-color);
    background-color: rgba(187, 134, 252, 0.12);
}

.checklist li {
    justify-content: flex-start;
    gap: 16px;
}

.list-group-header {
    min-height: 36px !important;
    padding: 8px 16px !important;
    color: var(--primary-color);
    background-color: rgba(187, 134, 252, 0.08);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

.list-subgroup-header {
    min-height: 32px !important;
    padding: 6px 16px !important;
    color: var(--text-secondary);
    background-color: rgba(255, 255, 255, 0.03);
    font-size: 0.78rem;
    font-weight: 700;
}

.list-item-row.is-checked {
    opacity: 0.72;
}

.list-item-row.is-checked .item-name {
    text-decoration: line-through;
}

.checklist input[type="checkbox"] {
    width: 24px;
    height: 24px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

/* Footer */
.app-footer {
    background-color: var(--surface-color);
    padding: var(--spacing-lg);
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    margin-top: auto;
}

.app-footer p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-link {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-link:hover {
    text-decoration: underline;
}

/* Views & Visibility */
.view {
    display: none;
}

.view.active {
    display: block;
}

.hidden {
    display: none !important;
}

@media (max-width: 720px) {
    .app-bar {
        padding: 10px var(--spacing-md);
    }

    .app-bar h1 {
        font-size: 1.1rem;
    }

    .app-navigation {
        right: var(--spacing-md);
    }

    .container {
        padding-bottom: 72px;
    }

    .add-food-form {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }

    .add-food-form .btn {
        width: 100%;
        margin-bottom: 0;
    }

    .list-add-grid {
        grid-template-columns: 1fr;
    }

    .list-add-grid .btn,
    .import-grid .btn,
    .export-grid .btn {
        width: 100%;
    }

    .export-grid,
    .import-grid {
        grid-template-columns: 1fr;
    }

    .quantity-control {
        margin-left: 0;
    }

    .list-item-row {
        align-items: flex-start;
        flex-wrap: wrap;
    }
}

/* Dashboard Tiles */
.tile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.tile-grid-empty {
    width: 100%;
    text-align: center;
    color: var(--text-secondary);
}

.tile {
    background-color: rgba(187, 134, 252, 0.1);
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    padding: 44px var(--spacing-md) var(--spacing-md);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    aspect-ratio: 1 / 1;
    cursor: pointer;
    transition: transform 0.2s, background-color 0.2s;
    text-align: center;
    position: relative;
}

.tile:hover {
    transform: scale(1.02);
    background-color: rgba(187, 134, 252, 0.2);
}

.tile-title {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
    max-width: 100%;
    overflow-wrap: anywhere;
    word-break: break-word;
    hyphens: auto;
    line-height: 1.25;
    text-align: center;
}

.tile-progress {
    font-size: 0.85rem;
    color: var(--text-secondary);
    min-height: 1.25em;
}

.tile-meta {
    font-size: 0.78rem;
    color: var(--primary-color);
    min-height: 1.2em;
    max-width: 100%;
    overflow-wrap: anywhere;
}

.tile-actions {
    position: absolute;
    top: 4px;
    right: 4px;
    display: flex;
    gap: 4px;
}

.tile-action-btn {
    background: transparent;
    border: none;
    color: var(--text-disabled);
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    transition: color 0.2s, background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tile-action-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.08);
}

.tile-action-btn[title="Liste löschen"]:hover {
    color: var(--error-color);
}

.tile-action-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.store-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--spacing-md);
}

.filter-chip {
    min-height: 36px;
    padding: 6px 12px;
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: 999px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font: inherit;
}

.filter-chip.active {
    border-color: var(--primary-color);
    background-color: rgba(187, 134, 252, 0.16);
    color: var(--text-primary);
}