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

:root {
    --primary-color: #0052CC;
    --primary-hover: #0747A6;
    --secondary-color: #42526E;
    --background-color: #F4F5F7;
    --card-background: #FFFFFF;
    --text-primary: #172B4D;
    --text-secondary: #5E6C84;
    --border-color: #DFE1E6;
    --success-color: #00875A;
    --warning-color: #FF8B00;
    --danger-color: #DE350B;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--card-background);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem 0;
    margin-bottom: 2rem;
}

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

h1 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.icon {
    font-size: 2rem;
}

.language-selector {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background-color: var(--card-background);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.lang-btn:hover {
    background-color: var(--background-color);
}

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

main {
    padding-bottom: 4rem;
}

section {
    background-color: var(--card-background);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

h3 {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

input[type="text"],
input[type="number"],
select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1);
}

.ingredients-list {
    margin-bottom: 1rem;
}

.ingredient-row {
    display: grid;
    grid-template-columns: 1fr 120px 100px 40px;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    align-items: center;
}

.ingredient-name {
    width: 100%;
}

.ingredient-amount {
    width: 100%;
}

.ingredient-unit {
    width: 100%;
}

.remove-ingredient {
    width: 36px;
    height: 36px;
    border: none;
    background-color: var(--danger-color);
    color: white;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease;
}

.remove-ingredient:hover {
    background-color: #BF2600;
}

.add-ingredient-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--background-color);
    color: var(--text-primary);
    border: 1px dashed var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s ease;
    width: 100%;
}

.add-ingredient-btn:hover {
    background-color: var(--border-color);
}

.actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.primary-btn,
.secondary-btn {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.primary-btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.secondary-btn {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.results {
    display: none;
}

.results.hidden {
    display: none;
}

.results:not(.hidden) {
    display: block;
}

.nutrition-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.nutrition-card {
    background-color: var(--background-color);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.nutrition-card h3 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.nutrition-card .value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.nutrition-card .per-serving {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.nutrition-chart {
    max-width: 400px;
    margin: 0 auto 2rem;
}

#nutrition-chart {
    max-height: 300px;
}

.detailed-ingredients {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

thead {
    background-color: var(--background-color);
}

th {
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

tbody tr:hover {
    background-color: var(--background-color);
}

.saved-recipes-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.recipe-card {
    background-color: var(--background-color);
    padding: 1.5rem;
    border-radius: 8px;
    transition: all 0.2s ease;
}

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

.recipe-card h3 {
    margin-bottom: 0.5rem;
}

.recipe-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.recipe-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.load-recipe,
.delete-recipe {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.load-recipe:hover {
    background-color: var(--primary-hover);
}

.delete-recipe {
    background-color: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.delete-recipe:hover {
    background-color: var(--danger-color);
    color: white;
}

.no-recipes {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem;
}

footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .ingredient-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .ingredient-row input,
    .ingredient-row select {
        width: 100%;
    }
    
    .remove-ingredient {
        width: 100%;
    }
    
    .nutrition-summary {
        grid-template-columns: 1fr;
    }
    
    .actions {
        flex-direction: column;
    }
    
    .primary-btn,
    .secondary-btn {
        width: 100%;
    }
    
    .recipe-actions {
        flex-direction: column;
    }
    
    .load-recipe,
    .delete-recipe {
        width: 100%;
    }
    
    table {
        font-size: 0.875rem;
    }
    
    th,
    td {
        padding: 0.5rem;
    }
}