:root {
    --primary-color: #10b981;
    --primary-hover: #059669;
    --secondary-color: #6366f1;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --background: #f9fafb;
    --surface: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

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

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

/* ヘッダー */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

h1 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.icon {
    font-size: 2.5rem;
}

.language-selector select {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--surface);
    font-size: 14px;
    cursor: pointer;
    transition: border-color 0.2s;
}

.language-selector select:hover {
    border-color: var(--primary-color);
}

/* フォームセクション */
.add-plant {
    background-color: var(--surface);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 32px;
    box-shadow: var(--shadow);
}

.add-plant h2 {
    margin-bottom: 20px;
    font-size: 1.5rem;
    color: var(--text-primary);
}

#plant-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    align-items: end;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.2s;
}

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

/* ボタン */
.btn-primary {
    padding: 10px 24px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.btn-secondary {
    padding: 8px 16px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-secondary:hover {
    opacity: 0.9;
}

/* 植物リスト */
.plant-list h2 {
    margin-bottom: 24px;
    font-size: 1.5rem;
}

.plants-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.plant-card {
    background-color: var(--surface);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.plant-card.needs-water {
    border: 2px solid var(--danger-color);
}

.plant-card.water-soon {
    border: 2px solid var(--warning-color);
}

.plant-icon {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 12px;
}

.plant-card h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
    text-align: center;
}

.plant-type {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
}

.water-status {
    text-align: center;
    font-weight: 600;
    margin-bottom: 8px;
}

.overdue {
    color: var(--danger-color);
}

.last-watered {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.actions button {
    flex: 1;
    min-width: 80px;
    padding: 8px 12px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: opacity 0.2s;
}

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

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

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

.actions button:hover {
    opacity: 0.9;
}

.no-plants {
    text-align: center;
    color: var(--text-secondary);
    font-size: 18px;
    padding: 60px 20px;
}

/* モーダル */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--surface);
    margin: 5% auto;
    padding: 32px;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    position: absolute;
    right: 24px;
    top: 24px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
}

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

.growth-notes {
    margin-top: 24px;
}

.growth-notes h4 {
    margin-bottom: 16px;
    color: var(--text-primary);
}

.notes-list {
    margin-bottom: 24px;
    max-height: 300px;
    overflow-y: auto;
}

.note {
    background-color: var(--background);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
}

.note-date {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.note-text {
    color: var(--text-primary);
}

.add-note-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

#new-note {
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    resize: vertical;
    min-height: 80px;
    font-family: inherit;
    font-size: 14px;
}

#new-note:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* レスポンシブ */
@media (max-width: 768px) {
    .container {
        padding: 16px;
    }

    header {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    h1 {
        font-size: 1.5rem;
    }

    #plant-form {
        grid-template-columns: 1fr;
    }

    .plants-grid {
        grid-template-columns: 1fr;
    }

    .actions {
        flex-direction: column;
    }

    .actions button {
        width: 100%;
    }
}