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

:root {
    --primary-color: #4a90e2;
    --secondary-color: #7b68ee;
    --danger-color: #e74c3c;
    --success-color: #27ae60;
    --light-bg: #f5f5f5;
    --border-color: #ddd;
    --text-color: #333;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #ffffff;
    color: var(--text-color);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: #fafbfc;
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

header {
    background: #ffffff;
    color: #333;
    padding: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(0,0,0,0.08);
}

header h1 {
    font-size: 2em;
}

/* 通知ボタンは廃止 */

main {
    padding: 30px;
}

h2 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.5em;
}

/* フォーム */
.form-section {
    background: var(--light-bg);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
    border-left: 4px solid var(--primary-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1em;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 5px rgba(74, 144, 226, 0.3);
}

/* ボタン */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 10px;
    width: 100%;
}

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

.btn-primary:hover {
    background: #3a7bb8;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    width: auto;
    padding: 10px 20px;
    margin-bottom: 20px;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9em;
    margin: 5px 5px 5px 0;
}

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

.btn-edit:hover {
    background: #3a7bb8;
}

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

.btn-delete:hover {
    background: #c0392b;
}

/* スケジュール表示 */
.schedule-section {
    margin-bottom: 30px;
}

.schedule-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.week-select {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.week-select label {
    font-weight: 600;
    color: var(--text-color);
}

.week-select select {
    width: 180px;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: white;
    color: var(--text-color);
}

.schedule-container {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.week-note-section,
.day-note {
    margin-bottom: 15px;
}

    .week-note-section label,
    .day-note label {
        display: block;
        margin-bottom: 8px;
        font-weight: 600;
        color: var(--text-color);
    }

    .week-note-section textarea,
    .day-note textarea,
    .form-group input,
    .form-group select,
    .form-group textarea {
        width: 100%;
        min-height: 70px;
        padding: 10px;
        border-radius: 6px;
        border: 1px solid var(--border-color);
        background: #ffffff;
        color: var(--text-color);
        resize: vertical;
    }

    .week-note-section button,
    .day-note button {
        margin-top: 10px;
        width: auto;
    }

    .day-card {
        background: white;
        color: var(--text-color);
        padding: 20px;
        border-radius: 8px;
        box-shadow: var(--shadow);
        border: 1px solid rgba(0,0,0,0.08);
    }

.day-card h3 {
    font-size: 1.3em;
    margin-bottom: 15px;
    border-bottom: 2px solid rgba(0,0,0,0.08);
    padding-bottom: 10px;
}

.lesson {
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 5px;
    border-left: 5px solid rgba(0,0,0,0.15);
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.04);
}

.lesson-name {
    font-weight: bold;
    font-size: 0.95em;
    margin-bottom: 3px;
}

.lesson-time {
    font-size: 0.85em;
    opacity: 0.9;
}

.lesson-remark {
    font-size: 0.85em;
    margin-top: 8px;
    color: #333;
    border-left: 3px solid rgba(0,0,0,0.12);
    padding-left: 8px;
}

.lesson-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 12px;
}

.lesson-actions .btn {
    width: auto;
    padding: 6px 12px;
    font-size: 0.85em;
}

.no-lessons {
    color: #999;
    font-style: italic;
    padding: 20px;
    text-align: center;
}

/* リスト表示 */
.list-section {
    background: var(--light-bg);
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid var(--secondary-color);
}

.list-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

.schedule-item {
    background: white;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.schedule-item:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.schedule-item h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.2em;
}

.schedule-item p {
    margin-bottom: 8px;
    color: #666;
    font-size: 0.95em;
}

.schedule-item .info-label {
    font-weight: 600;
    color: var(--text-color);
}

.schedule-item .button-group {
    margin-top: 15px;
    display: flex;
    gap: 10px;
}

.empty-state {
    text-align: center;
    padding: 40px;
    color: #999;
}

.empty-state p {
    font-size: 1.1em;
    margin-bottom: 10px;
}

/* モーダル */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    min-height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}
.modal-content {
    background: white;
    padding: 30px;
    border-radius: 10px;
    max-width: 500px;
    width: 90%;
    max-height: calc(100vh - 40px);
    overflow-y: auto;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

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

.modal-content h2 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

/* レスポンシブ */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    header h1 {
        font-size: 1.5em;
    }

    main {
        padding: 15px;
    }

    .schedule-container {
        grid-template-columns: 1fr;
    }

    .list-container {
        grid-template-columns: 1fr;
    }

    .schedule-item .button-group {
        flex-direction: column;
    }

    .schedule-item .button-group button {
        width: 100%;
        margin: 0;
    }
}

footer {
    background: var(--light-bg);
    text-align: center;
    padding: 20px;
    border-top: 1px solid var(--border-color);
    color: #999;
    font-size: 0.9em;
}