/* style.css - 課堂管理系統共用樣式（藍色漸層 + 圓角膠囊按鈕） */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: "Microsoft JhengHei", "PingFang TC", Arial, sans-serif;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    min-height: 100vh;
    padding: 20px;
    color: #222;
}

.login-body {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; padding: 20px;
}
.login-box {
    background: #fff; padding: 40px; border-radius: 20px;
    width: 340px; box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.login-box h1 {
    text-align: center; margin-bottom: 24px; font-size: 1.6em;
    color: #1e3c72; border-bottom: 3px solid #1e3c72; padding-bottom: 12px;
}
.error-msg {
    background: #f8d7da; color: #721c24; padding: 12px 15px; border-radius: 10px;
    margin-bottom: 16px; font-size: 14px; border: 1px solid #f5c6cb;
}
.login-box .form-group input {
    width: 100%; padding: 12px; border: 2px solid #d1dce5; border-radius: 10px;
    font-size: 16px; transition: all 0.3s;
}
.login-box .form-group input:focus {
    outline: none; border-color: #1e3c72; box-shadow: 0 0 0 3px rgba(30,60,114,0.1);
}
.login-box .btn-primary {
    width: 100%; border-radius: 25px; padding: 12px; font-size: 16px; font-weight: bold;
}

.container {
    max-width: 1400px; margin: 0 auto; background: #fff;
    border-radius: 20px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); overflow: hidden;
}

.topbar {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: #fff; padding: 20px 30px;
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap;
}
.topbar h1 { font-size: 1.6em; }
.user-info { display: flex; align-items: center; gap: 16px; font-size: 14px; }
.logout {
    color: #fff; text-decoration: none; padding: 8px 16px; border: 2px solid #fff;
    border-radius: 20px; transition: all 0.3s;
}
.logout:hover { background: rgba(255,255,255,0.2); transform: translateY(-2px); }

.tabs {
    background: #f0f4f8; padding: 15px 30px; display: flex; gap: 10px;
    border-bottom: 2px solid #e1e8ed; flex-wrap: wrap;
}
.tab-btn {
    padding: 12px 25px; border: 2px solid #1e3c72; border-radius: 25px;
    background: #fff; color: #1e3c72; cursor: pointer; font-size: 15px;
    font-weight: bold; transition: all 0.3s;
}
.tab-btn:hover, .tab-btn.active {
    background: #1e3c72; color: #fff; transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(30,60,114,0.4);
}

.tab-content { display: none; padding: 25px 30px 30px 30px; animation: fadeIn 0.4s; }
.tab-content.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }

.card {
    background: #fff; border-radius: 15px; padding: 25px; margin-bottom: 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08); border: 1px solid #eef1f5;
}
.card h2 {
    font-size: 1.3em; margin-bottom: 18px; color: #1e3c72;
    border-bottom: 3px solid #1e3c72; padding-bottom: 10px;
}

.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 8px; color: #1e3c72; font-weight: bold; font-size: 15px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 12px; border: 2px solid #d1dce5; border-radius: 10px;
    font-size: 15px; background: #fff; transition: all 0.3s;
}
.form-group textarea { min-height: 80px; resize: vertical; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: #1e3c72; box-shadow: 0 0 0 3px rgba(30,60,114,0.1);
}

.form-inline { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }
.form-inline input, .form-inline select {
    padding: 10px 12px; border: 2px solid #d1dce5; border-radius: 10px; font-size: 14px;
}

.btn {
    padding: 12px 28px; border: none; border-radius: 25px; cursor: pointer;
    font-size: 15px; font-weight: bold; transition: all 0.3s;
}
.btn-primary { background: #1e3c72; color: #fff; }
.btn-primary:hover { background: #152d56; transform: translateY(-2px); box-shadow: 0 5px 15px rgba(30,60,114,0.4); }
.btn-secondary { background: #fff; color: #1e3c72; border: 2px solid #1e3c72; }
.btn-secondary:hover { background: #1e3c72; color: #fff; }
.btn-danger { background: #dc3545; color: #fff; }
.btn-danger:hover { background: #c82333; transform: translateY(-2px); }
.btn-sm { padding: 7px 16px; font-size: 13px; margin-right: 4px; margin-bottom: 4px; }

table {
    width: 100%; border-collapse: collapse; margin-top: 10px;
    background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,0.08); border-radius: 10px; overflow: hidden;
}
thead { background: #1e3c72; color: #fff; }
th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid #e1e8ed; font-size: 14px; }
th { font-weight: bold; }
tbody tr:hover { background: #f0f4f8; }
.empty-msg { text-align: center; color: #999; padding: 25px !important; }

.badge { padding: 4px 12px; border-radius: 12px; font-size: 12px; color: #fff; font-weight: bold; }
.badge.scheduled { background: #ffc107; color: #1e3c72; }
.badge.completed { background: #28a745; }
.badge.cancelled { background: #999; }

.weekday-tag { color: #4b6cb7; font-size: 12px; margin-left: 4px; }
.weekday-tag.weekend { color: #dc3545; font-weight: bold; }

.month-nav { display: flex; align-items: center; gap: 15px; margin-bottom: 18px; flex-wrap: wrap; }
.month-nav span { font-weight: bold; color: #1e3c72; font-size: 16px; }
.month-nav button {
    padding: 8px 18px; border: 2px solid #1e3c72; background: #fff; color: #1e3c72;
    border-radius: 20px; cursor: pointer; font-weight: bold; transition: all 0.3s;
}
.month-nav button:hover { background: #1e3c72; color: #fff; }

.remaining-box { display: flex; flex-wrap: wrap; gap: 12px; }
.remaining-item {
    background: #e3f2fd; padding: 12px 18px; border-radius: 20px; font-size: 14px;
    display: flex; align-items: center; gap: 10px; border: 1px solid #1e3c72; color: #1e3c72;
}

.modal-overlay {
    display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.45); align-items: center; justify-content: center; z-index: 1000;
}
.modal-overlay.active { display: flex; }
.modal-box {
    background: #fff; border-radius: 15px; padding: 28px; width: 500px; max-height: 85vh;
    overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.modal-box h3 {
    margin-bottom: 18px; color: #1e3c72; border-bottom: 3px solid #1e3c72; padding-bottom: 10px;
}
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

@media print {
    body { background: #fff !important; padding: 0 !important; }
    .container { box-shadow: none !important; border-radius: 0 !important; max-width: 100% !important; }
    .no-print, .topbar, .tabs { display: none !important; }
    table { box-shadow: none !important; border: 1px solid #000 !important; }
    thead { background: #1e3c72 !important; color: #fff !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    th, td { border: 1px solid #000 !important; padding: 8px !important; font-size: 12px !important; }
    @page { size: A4 landscape; margin: 15mm; }
}