:root {
    --primary: #4CAF50;
    --primary-hover: #45a049;
    --bg: #f4f7f6;
    --container-bg: #ffffff;
    --card-bg: #ffffff;
    --text-main: #333333;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.08);
    --meal-bg: #f9fafb;
}

[data-theme="dark"] {
    --bg: #121212;
    --container-bg: #1e1e1e;
    --card-bg: #242424;
    --text-main: #e0e0e0;
    --text-secondary: #aaaaaa;
    --border-color: #333333;
    --shadow: rgba(0, 0, 0, 0.4);
    --meal-bg: #2a2a2a;
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

header {
    background: var(--container-bg);
    box-shadow: 0 2px 10px var(--shadow);
    padding: 15px 20px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    font-size: 1.5rem;
    color: var(--primary);
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    transition: background 0.2s;
}

.theme-toggle:hover {
    background: var(--meal-bg);
}

.container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
}

.intro {
    text-align: center;
    margin-bottom: 40px;
    background: var(--container-bg);
    padding: 40px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow);
}

.intro p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.ai-test-section {
    margin-bottom: 40px;
}

.ai-box {
    background: var(--container-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow);
    text-align: center;
    border: 1px solid var(--border-color);
}

.ai-box h2 {
    color: var(--primary);
    margin-bottom: 10px;
}

.upload-container {
    margin: 20px 0;
}

.file-input {
    display: none;
}

#image-preview-container {
    margin: 20px auto;
    border-radius: 8px;
    overflow: hidden;
    max-width: 300px;
    max-height: 300px;
    border: 2px solid var(--primary);
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--meal-bg);
}

#image-preview {
    width: 100%;
    height: auto;
}

#label-container {
    margin: 15px 0;
    font-weight: bold;
    color: var(--text-main);
}

#label-container div {
    margin: 5px 0;
    padding: 8px;
    background: var(--meal-bg);
    border-radius: 4px;
}

.input-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.location-box, .calorie-box {
    background: var(--meal-bg);
    padding: 20px;
    border-radius: 8px;
    text-align: left;
    border: 1px solid var(--border-color);
}

.location-box label, .calorie-box label {
    display: block;
    font-weight: bold;
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.input-group {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 10px;
}

.input-group input {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    width: 100%;
    background: var(--container-bg);
    color: var(--text-main);
}

.unit-text {
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.location-hint {
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 600;
}

.delivery-info, .helper-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .input-section {
        grid-template-columns: 1fr;
    }
}

.primary-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
}

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

.plan-container {
    display: none;
}

.plan-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.secondary-btn {
    background: white;
    color: var(--primary);
    border: 2px solid var(--primary);
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: bold;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

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

[data-theme="dark"] .secondary-btn {
    background: transparent;
    color: var(--primary);
}

[data-theme="dark"] .secondary-btn:hover {
    background: var(--primary);
    color: white;
}

@media (max-width: 600px) {
    .plan-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}

.days-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.day-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 10px var(--shadow);
}

.day-header {
    background: var(--primary);
    color: white;
    padding: 10px 15px;
    font-weight: bold;
    font-size: 1.2rem;
    display: flex;
    justify-content: space-between;
}

.meal-slot {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

.meal-slot:last-child {
    border-bottom: none;
}

.meal-type {
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 5px;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.meal-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.meal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.meta-item {
    background: var(--meal-bg);
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.recipe-link {
    display: inline-block;
    color: #e52d27;
    text-decoration: none;
    font-weight: bold;
    font-size: 0.9rem;
}

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

.partnership-section {
    margin-top: 50px;
    padding-bottom: 50px;
}

.partnership-box {
    background: var(--container-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow);
    text-align: center;
    border: 1px solid var(--border-color);
}

.partnership-box h2 {
    color: var(--primary);
    margin-bottom: 10px;
}

.partnership-box p {
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.partnership-form {
    text-align: left;
    max-width: 600px;
    margin: 0 auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 15px;
}

.partnership-form .form-group {
    margin-bottom: 15px;
}

.partnership-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.partnership-form input, .partnership-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background: var(--meal-bg);
    color: var(--text-main);
}

.partnership-form button {
    margin-top: 10px;
    width: 100%;
}

.comments-section {
    margin-top: 50px;
    background: var(--container-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow);
    border: 1px solid var(--border-color);
}

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .days-grid {
        grid-template-columns: 1fr;
    }
}