/* 全域樣式 */
:root {
    --primary-color: #4a90e2;
    --secondary-color: #7b68ee;
    --success-color: #52c41a;
    --danger-color: #ff4d4f;
    --warning-color: #faad14;
    --info-color: #13c2c2;
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --border-color: #e1e8ed;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 12px rgba(0,0,0,0.15);
}

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

body {
    font-family: 'Noto Sans TC', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem 0;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    font-size: 1.1rem;
    opacity: 0.95;
}

/* Main Content */
main {
    padding: 2rem 0;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-hover);
}

.card h2 {
    color: var(--text-primary);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.8rem;
    border-bottom: 3px solid var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.card h3 {
    color: var(--text-primary);
    font-size: 1.4rem;
    margin: 1.5rem 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.form-group small {
    display: block;
    margin-top: 0.3rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Settings Grid */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* Search Box */
.search-box {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.search-box:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

/* Oils Layout */
.oils-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.available-oils,
.selected-oils {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    background: var(--bg-color);
}

/* Oil Options */
.oil-options {
    max-height: 500px;
    overflow-y: auto;
    display: grid;
    gap: 0.5rem;
}

.oil-option {
    padding: 0.8rem 1rem;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.oil-option:hover {
    border-color: var(--primary-color);
    background: rgba(74, 144, 226, 0.05);
    transform: translateX(3px);
}

.oil-option.selected {
    background: rgba(74, 144, 226, 0.1);
    border-color: var(--primary-color);
}

.oil-option-name {
    font-weight: 500;
}

.oil-option-add {
    color: var(--success-color);
    font-size: 1.2rem;
}

/* Selected Oils List */
.selected-oils-list {
    max-height: 500px;
    overflow-y: auto;
    margin-bottom: 1rem;
}

.selected-oil-item {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 0.8rem;
    transition: all 0.3s ease;
}

.selected-oil-item:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.oil-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.8rem;
}

.oil-name {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.oil-remove {
    color: var(--danger-color);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    transition: background 0.3s ease;
}

.oil-remove:hover {
    background: rgba(255, 77, 79, 0.1);
}

.oil-controls {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1rem;
    align-items: end;
}

.oil-slider-group {
    flex: 1;
}

.oil-slider-group label {
    display: block;
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.oil-slider {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

.oil-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.oil-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: var(--secondary-color);
}

.oil-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

.oil-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    background: var(--secondary-color);
}

.oil-percent {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 50px;
    text-align: right;
    font-size: 1.1rem;
}

.oil-weight {
    text-align: center;
    padding: 0.5rem;
    background: var(--bg-color);
    border-radius: 6px;
    border: 2px solid var(--border-color);
}

.oil-weight-value {
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--text-primary);
}

.oil-weight-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: block;
    margin-top: 0.2rem;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: inherit;
}

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

.btn-primary:hover {
    background: #357abd;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

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

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

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

.btn-success:hover {
    background: #49b318;
    transform: translateY(-2px);
}

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

.btn-info:hover {
    background: #11b0b0;
    transform: translateY(-2px);
}

.button-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Results Section */
.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.results-header h2 {
    margin-bottom: 0;
    border-bottom: none;
}

/* Ingredients Table */
.ingredients-table {
    background: var(--bg-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.ingredient-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    align-items: center;
}

.ingredient-row:last-child {
    border-bottom: none;
}

.ingredient-row.header {
    font-weight: 700;
    background: white;
    border-radius: 6px;
    margin-bottom: 0.5rem;
}

.ingredient-row.total {
    font-weight: 700;
    background: white;
    border-radius: 6px;
    margin-top: 0.5rem;
    font-size: 1.1rem;
}

.ingredient-name {
    font-weight: 500;
    color: var(--text-primary);
}

.ingredient-value {
    text-align: right;
    color: var(--text-primary);
}

/* Properties Section */
.properties-section {
    margin-top: 2rem;
}

.properties-grid {
    display: grid;
    gap: 1.5rem;
}

.property-item {
    background: var(--bg-color);
    padding: 1rem;
    border-radius: 8px;
    border: 2px solid var(--border-color);
}

.property-item label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.property-bar {
    position: relative;
    height: 32px;
    background: white;
    border-radius: 6px;
    overflow: hidden;
    border: 2px solid var(--border-color);
    margin-bottom: 0.5rem;
}

.property-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.6s ease;
    border-radius: 4px;
    position: relative;
}

.property-value {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    font-weight: 700;
    color: var(--text-primary);
    background: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.95rem;
}

/* Fatty Acids */
.fatty-acids-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.fatty-acid-item {
    background: var(--bg-color);
    padding: 1rem;
    border-radius: 8px;
    border: 2px solid var(--border-color);
    text-align: center;
}

.fatty-acid-name {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

/* Recipe Management */
.recipe-controls {
    margin-bottom: 1.5rem;
}

.saved-recipes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.saved-recipe-item {
    background: var(--bg-color);
    padding: 1rem;
    border-radius: 8px;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

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

.recipe-item-name {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.recipe-item-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.recipe-item-delete {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 4px;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.saved-recipe-item:hover .recipe-item-delete {
    opacity: 1;
}

/* Footer */
footer {
    background: var(--text-primary);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

footer p {
    margin: 0.5rem 0;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .oils-layout {
        grid-template-columns: 1fr;
    }
    
    .settings-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .card h2 {
        font-size: 1.5rem;
    }
    
    .results-header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .results-header h2 {
        margin-bottom: 0;
    }
    
    .ingredient-row {
        grid-template-columns: 1.5fr 1fr 1fr;
        gap: 0.5rem;
        font-size: 0.9rem;
    }
    
    .oil-controls {
        grid-template-columns: 1fr;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .button-group .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .fatty-acids-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .saved-recipes {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    header, footer, .recipe-management, .btn {
        display: none;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #000;
        page-break-inside: avoid;
    }
}

/* Alert Messages */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    animation: slideIn 0.3s ease;
}

.alert-info {
    background: rgba(19, 194, 194, 0.1);
    border: 2px solid var(--info-color);
    color: #0c7c7c;
}

.alert-warning {
    background: rgba(250, 173, 20, 0.1);
    border: 2px solid var(--warning-color);
    color: #ad6800;
}

.alert-danger {
    background: rgba(255, 77, 79, 0.1);
    border: 2px solid var(--danger-color);
    color: #c73537;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading State */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}