/* リセットとベース */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Atlassianデザインシステムを参考にした色設定 */
    --primary-color: #0052CC;
    --primary-hover: #0065FF;
    --secondary-color: #42526E;
    --background-color: #F4F5F7;
    --surface-color: #FFFFFF;
    --border-color: #DFE1E6;
    --text-primary: #172B4D;
    --text-secondary: #6B778C;
    --success-color: #00875A;
    --danger-color: #DE350B;
    --warning-color: #FF991F;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px 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);
}

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

/* コンテナ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ヘッダー */
header {
    background-color: var(--surface-color);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    position: relative;
}

h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

.language-selector {
    position: absolute;
    top: 30px;
    right: 30px;
}

.language-selector select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--surface-color);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
}

/* メイン */
main {
    flex: 1;
}

/* コントロール */
.controls {
    background-color: var(--surface-color);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.project-info {
    display: flex;
    gap: 12px;
    flex: 1;
}

.project-info input {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s;
}

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

#projectName {
    flex: 1;
    min-width: 200px;
}

.actions {
    display: flex;
    gap: 12px;
}

/* ボタン */
button {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

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

.btn-danger:hover {
    background-color: #B71C1C;
}

.btn-icon {
    padding: 4px 8px;
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.btn-icon:hover {
    opacity: 1;
}

/* ガントチャート */
.gantt-container {
    background-color: var(--surface-color);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: 24px;
}

.gantt-header {
    display: flex;
    background-color: var(--background-color);
    border-bottom: 2px solid var(--border-color);
}

.task-list-header {
    width: 300px;
    padding: 16px;
    border-right: 1px solid var(--border-color);
}

.task-list-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.timeline-header {
    flex: 1;
    display: flex;
    padding: 16px 0;
    overflow-x: auto;
}

.day-header {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    border-right: 1px solid var(--border-color);
    padding: 0 4px;
}

.gantt-body {
    display: flex;
    min-height: 400px;
}

.task-list {
    width: 300px;
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
}

.task-item {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.2s;
}

.task-item:hover {
    background-color: var(--background-color);
}

.task-info h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.task-info p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.progress-bar {
    width: 150px;
    height: 4px;
    background-color: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    transition: width 0.3s;
}

.task-actions {
    display: flex;
    gap: 4px;
}

.timeline {
    flex: 1;
    position: relative;
    overflow-x: auto;
}

.gantt-row {
    height: 79px;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.gantt-bar {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    height: 30px;
    border-radius: 4px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s;
    overflow: hidden;
}

.gantt-bar:hover {
    transform: translateY(-50%) scale(1.05);
    box-shadow: var(--shadow-md);
}

.gantt-progress {
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2);
    transition: width 0.3s;
}

/* タスクフォーム */
.task-form {
    background-color: var(--surface-color);
    padding: 24px;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    max-width: 500px;
    margin: 0 auto;
}

.task-form h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s;
}

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

.form-group input[type="range"] {
    padding: 0;
}

.form-group input[type="color"] {
    width: 100px;
    height: 40px;
    padding: 4px;
    cursor: pointer;
}

#progressValue {
    margin-left: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

/* フッター */
footer {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* レスポンシブ */
@media (max-width: 768px) {
    .container {
        padding: 12px;
    }
    
    header {
        padding: 20px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    .language-selector {
        position: static;
        margin-top: 16px;
    }
    
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .project-info {
        flex-direction: column;
    }
    
    .actions {
        justify-content: stretch;
        flex-direction: column;
    }
    
    .actions button {
        width: 100%;
    }
    
    .task-list-header,
    .task-list {
        width: 200px;
    }
    
    .task-info h4 {
        font-size: 13px;
    }
    
    .progress-bar {
        width: 100px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* スクロールバー */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

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