/* 共通スタイル */
:root {
    --primary-color: #4a6da7;
    --secondary-color: #6c8cbb;
    --accent-color: #ff9800;
    --text-color: #333333;
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --pending-color: #9e9e9e;
    --approved-color: #4caf50;
    --rejected-color: #f44336;
}

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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
}

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

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 15px 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

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

header h1 {
    color: white;
    margin: 0;
}

#main-nav {
    display: flex;
    align-items: center;
}

nav button {
    margin-left: 10px;
}

section {
    margin: 30px 0;
}

footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 15px 0;
    margin-top: 50px;
}

/* フォーム共通スタイル */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

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

button.secondary {
    background-color: #9e9e9e;
}

/* カレンダー共通スタイル */
.calendar-container {
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    margin-bottom: 10px;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background-color: var(--primary-color);
    color: white;
}

.month-title {
    font-size: 18px;
    font-weight: bold;
}

.calendar-navigation button {
    margin-left: 10px;
    padding: 5px 10px;
    background-color: rgba(255, 255, 255, 0.2);
}

.weekday-row {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    background-color: var(--secondary-color);
    color: white;
}

.weekday {
    padding: 10px;
    text-align: center;
    font-weight: bold;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    grid-gap: 1px;
    background-color: var(--border-color);
}

.calendar-cell {
    background-color: var(--card-bg);
    min-height: 100px;
    padding: 5px;
    position: relative;
}

.calendar-cell.empty {
    background-color: #f9f9f9;
}

.calendar-cell.today {
    background-color: rgba(74, 109, 167, 0.1);
}

.date-number {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.calendar-cell.today .date-number {
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
}

.events-container {
    margin-top: 35px;
}

.event-item {
    margin-bottom: 5px;
    padding: 5px;
    font-size: 12px;
    border-radius: 3px;
    background-color: rgba(74, 109, 167, 0.1);
    border-left: 3px solid var(--pending-color);
    cursor: pointer;
}

.event-item.pending {
    border-left-color: var(--pending-color);
}

.event-item.approved {
    border-left-color: var(--approved-color);
}

.event-item.rejected {
    border-left-color: var(--rejected-color);
}

/* ユーティリティクラス */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mb-1 {
    margin-bottom: 10px;
}

.mb-2 {
    margin-bottom: 20px;
}

.mt-1 {
    margin-top: 10px;
}

.mt-2 {
    margin-top: 20px;
}

.flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.items-center {
    align-items: center;
}

/* ステータスバッジ */
.status-badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 12px;
    color: white;
}

.status-badge.pending {
    background-color: var(--pending-color);
}

.status-badge.approved {
    background-color: var(--approved-color);
}

.status-badge.rejected {
    background-color: var(--rejected-color);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .calendar-grid {
        grid-template-columns: repeat(7, 1fr);
    }
    
    .calendar-cell {
        min-height: 60px;
    }
    
    .events-container {
        margin-top: 25px;
    }
    
    .container {
        padding: 10px;
    }
}

@media (max-width: 576px) {
    .calendar-navigation button {
        padding: 3px 6px;
        font-size: 14px;
    }
    
    .month-title {
        font-size: 16px;
    }
    
    .weekday {
        padding: 5px;
        font-size: 14px;
    }
    
    .date-number {
        width: 25px;
        height: 25px;
        font-size: 14px;
    }
    
    .events-container {
        margin-top: 25px;
    }
    
    .event-item {
        font-size: 10px;
        padding: 3px;
    }
}