/* CSS Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #e67e22;
    --primary-dark: #d35400;
    --secondary-color: #27ae60;
    --danger-color: #e74c3c;
    --bg-color: #f5f5f5;
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-muted: #777777;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 1.5rem 1rem;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

header .subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Main Content */
main {
    padding: 1rem;
    padding-bottom: 5rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Search Bar */
.search-container {
    position: relative;
    margin-bottom: 1rem;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 3rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    background: var(--card-bg);
    color: var(--text-color);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.1);
}

.search-input::placeholder {
    color: var(--text-muted);
}

/* Category Filter */
.category-filter {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    overflow: hidden;
}

.category-tabs {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding: 0.5rem 0;
    flex: 1;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.category-tabs::-webkit-scrollbar {
    display: none;
}

.category-tab {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
    color: var(--text-color);
}

.category-tab:hover {
    border-color: var(--primary-color);
}

.category-tab.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.btn-icon {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    color: var(--text-muted);
}

.btn-icon:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Recipe Grid */
.recipes-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

/* Recipe Card */
.recipe-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all 0.2s ease;
    border: 2px solid transparent;
}

.recipe-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

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

.recipe-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    flex: 1;
}

.recipe-card .category-badge {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    white-space: nowrap;
}

.recipe-card-preview {
    color: var(--text-muted);
    font-size: 0.875rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.recipe-card-link {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--primary-color);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.recipe-card-link svg {
    width: 16px;
    height: 16px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
    display: none;
}

.empty-state.visible {
    display: block;
}

.empty-state svg {
    color: var(--border-color);
    margin-bottom: 1rem;
}

.empty-state h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

/* FAB (Floating Action Button) */
.fab {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 50;
}

.fab:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.fab:active {
    transform: scale(0.95);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--card-bg);
    width: 100%;
    max-height: 90vh;
    border-radius: var(--radius) var(--radius) 0 0;
    padding: 1.5rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

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

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

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease;
    background: var(--card-bg);
    color: var(--text-color);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.btn {
    flex: 1;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

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

.btn-secondary:hover {
    background: #d0d0d0;
}

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

.btn-danger:hover {
    background: #c0392b;
}

/* Category Management */
.add-category-form {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    align-items: center;
}

.add-category-form input[type="text"] {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

.add-category-form input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

.add-category-form input[type="color"] {
    width: 44px;
    height: 44px;
    padding: 2px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: var(--card-bg);
}

.add-category-form input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.add-category-form input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

.add-category-form .btn {
    flex: 0;
    white-space: nowrap;
}

.categories-list {
    list-style: none;
    max-height: 250px;
    overflow-y: auto;
}

.category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    gap: 0.5rem;
}

.category-item:last-child {
    border-bottom: none;
}

.category-item-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 0;
}

.category-color-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    flex-shrink: 0;
    border: 2px solid rgba(0, 0, 0, 0.1);
}

.category-item-name {
    font-size: 1rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.category-item-actions {
    display: flex;
    gap: 0.25rem;
    flex-shrink: 0;
}

.category-item .edit-btn,
.category-item .delete-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    font-size: 1.1rem;
    line-height: 1;
    border-radius: 4px;
    transition: background 0.2s ease;
}

.category-item .edit-btn {
    color: var(--text-muted);
}

.category-item .edit-btn:hover {
    color: var(--primary-color);
    background: rgba(230, 126, 34, 0.1);
}

.category-item .delete-btn {
    color: var(--text-muted);
}

.category-item .delete-btn:hover {
    color: var(--danger-color);
    background: rgba(231, 76, 60, 0.1);
}

/* Edit Category Overlay */
.edit-category-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 10;
    border-radius: var(--radius);
}

.edit-category-overlay.active {
    opacity: 1;
    visibility: visible;
}

.edit-category-panel {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    width: 90%;
    max-width: 300px;
    box-shadow: var(--shadow-lg);
}

.edit-category-panel h3 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.edit-category-panel .form-group input[type="color"] {
    width: 100%;
    height: 50px;
    padding: 4px;
    cursor: pointer;
}

.edit-category-panel .form-group input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 4px;
}

.edit-category-panel .form-group input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

/* Modal with relative positioning for overlay */
#categoriesModal .modal-content {
    position: relative;
}

/* View Recipe */
.recipe-details {
    padding: 0;
}

.recipe-category-badge {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.recipe-link-section {
    margin-bottom: 1rem;
}

.recipe-link-section a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.95rem;
    word-break: break-all;
}

.recipe-link-section a:hover {
    text-decoration: underline;
}

.recipe-description {
    background: var(--bg-color);
    padding: 1rem;
    border-radius: var(--radius-sm);
    white-space: pre-wrap;
    font-size: 0.95rem;
    line-height: 1.7;
    min-height: 100px;
}

/* Desktop Styles */
@media (min-width: 640px) {
    header {
        padding: 2rem;
    }

    header h1 {
        font-size: 2rem;
    }

    main {
        padding: 1.5rem;
        padding-bottom: 5rem;
    }

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

    .modal {
        align-items: center;
    }

    .modal-content {
        max-width: 500px;
        border-radius: var(--radius);
        max-height: 85vh;
    }

    .fab {
        bottom: 2rem;
        right: 2rem;
    }
}

@media (min-width: 1024px) {
    .recipes-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --card-bg: #2d2d2d;
        --text-color: #f0f0f0;
        --text-muted: #a0a0a0;
        --border-color: #404040;
    }

    .recipe-description {
        background: #222222;
    }
}