/* 校园预约管理系统 - 前台样式 */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --gray: #64748b;
    --border: #e2e8f0;
    --bg: #f1f5f9;
    --card: #ffffff;
    --text: #1e293b;
}

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* 顶部导航 */
.navbar {
    background: linear-gradient(135deg, #1e3a8a, #2563eb);
    color: #fff;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 8px rgba(0,0,0,.1);
}
.navbar .brand { font-size: 20px; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.navbar .brand .logo { font-size: 24px; }
.navbar .nav-links { display: flex; gap: 20px; align-items: center; }
.navbar .nav-links a { color: #dbeafe; font-size: 14px; }
.navbar .nav-links a:hover { color: #fff; text-decoration: none; }
.navbar .nav-links a.active { color: #fff; font-weight: 600; }

.container { max-width: 720px; margin: 32px auto; padding: 0 16px; }
.container.wide { max-width: 960px; }

.card {
    background: var(--card);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,.08);
    padding: 28px;
    margin-bottom: 20px;
}
.card-title { font-size: 18px; font-weight: 700; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }
.card-title .bar { width: 4px; height: 18px; background: var(--primary); border-radius: 2px; }

/* 表单 */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; color: #334155; }
.form-group label .req { color: var(--danger); }
.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    transition: border-color .2s, box-shadow .2s;
    background: #fff;
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.12); }
select.form-control { appearance: auto; }
.form-tip { font-size: 12px; color: var(--gray); margin-top: 4px; }

.btn {
    display: inline-block;
    padding: 11px 24px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background .2s, transform .1s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:active { transform: translateY(1px); }
.btn-block { width: 100%; }
.btn:disabled { opacity: .6; cursor: not-allowed; }

/* 提示信息条 */
.notice {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 13px;
    color: #1e40af;
    margin-bottom: 20px;
}
.notice .notice-item { display: flex; gap: 6px; margin: 2px 0; }

/* 剩余名额 */
.quota-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
    border-radius: 20px;
    padding: 4px 12px;
    font-size: 13px;
    font-weight: 600;
}
.quota-badge.full { background: #fef2f2; color: #991b1b; border-color: #fecaca; }

/* 消息提示 */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; display: none; }
.alert-success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.alert-error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* 查询结果表格 */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { padding: 12px 10px; text-align: left; border-bottom: 1px solid var(--border); }
.table th { background: #f8fafc; font-weight: 600; color: #475569; font-size: 13px; }
.table tr:hover td { background: #f8fafc; }

/* 状态徽章 */
.badge { display: inline-block; padding: 3px 10px; border-radius: 12px; font-size: 12px; font-weight: 600; }
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-approved { background: #dcfce7; color: #166534; }
.badge-rejected { background: #fee2e2; color: #991b1b; }
.badge-noshow { background: #475569; color: #fff; }

.empty { text-align: center; color: var(--gray); padding: 40px 0; font-size: 14px; }

.footer { text-align: center; color: var(--gray); font-size: 12px; padding: 24px 0; }

/* 时段选择网格 */
.slot-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px; margin-top: 8px; }
.slot-item {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 10px;
    text-align: center;
    font-size: 13px;
    cursor: pointer;
    transition: all .15s;
    background: #fff;
}
.slot-item:hover { border-color: var(--primary); }
.slot-item.selected { background: var(--primary); color: #fff; border-color: var(--primary); }
.slot-item.disabled { opacity: .4; cursor: not-allowed; background: #f8fafc; }
.slot-item .slot-period { font-size: 11px; opacity: .7; display: block; }

@media (max-width: 600px) {
    .navbar { padding: 0 16px; }
    .navbar .brand { font-size: 16px; }
    .card { padding: 20px; }
}