/* 班主任值班积分系统 - 全局样式（响应式） */
:root {
    --primary: #1e88e5;
    --primary-dark: #1565c0;
    --primary-light: #e3f2fd;
    --success: #2e7d32;
    --success-light: #e8f5e9;
    --danger: #c62828;
    --danger-light: #ffebee;
    --warning: #f57c00;
    --warning-light: #fff3e0;
    --gray: #757575;
    --gray-light: #f5f5f5;
    --gray-border: #e0e0e0;
    --text: #212121;
    --text-light: #616161;
    --bg: #fafafa;
    --white: #ffffff;
    --gold: #f9a825;
    --silver: #90a4ae;
    --bronze: #bf6a3a;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.12);
    --radius: 6px;
}

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

html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
                 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px;
}

/* 顶部导航 */
.navbar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 12px 16px;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}
.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}
.navbar h1 {
    font-size: 18px;
    font-weight: 600;
}
.navbar .nav-links {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}
.navbar .nav-links a {
    color: white;
    padding: 6px 12px;
    border-radius: var(--radius);
    font-size: 14px;
    transition: background 0.2s;
}
.navbar .nav-links a:hover {
    background: rgba(255,255,255,0.15);
    text-decoration: none;
}
.navbar .nav-links a.active {
    background: rgba(255,255,255,0.25);
}
.navbar .user-info {
    font-size: 13px;
    opacity: 0.9;
}

/* 卡片 */
.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px;
    margin-bottom: 16px;
}
.card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--gray-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    line-height: 1.2;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 16px; }
.btn-secondary { background: var(--gray); }
.btn-secondary:hover { background: #616161; }
.btn-success { background: var(--success); }
.btn-success:hover { background: #1b5e20; }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #b71c1c; }
.btn-ghost {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}
.btn-ghost:hover { background: var(--primary-light); }

.btn-group { display: inline-flex; gap: 6px; flex-wrap: wrap; }

/* 表格 */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.data {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    background: var(--white);
}
table.data th, table.data td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--gray-border);
}
table.data th {
    background: var(--gray-light);
    font-weight: 600;
    color: var(--text-light);
    font-size: 13px;
    white-space: nowrap;
}
table.data tr:hover td { background: var(--primary-light); }
table.data .num { text-align: right; font-variant-numeric: tabular-nums; }
table.data .center { text-align: center; }

.score-pos { color: var(--success); font-weight: 600; }
.score-neg { color: var(--danger); font-weight: 600; }
.score-zero { color: var(--gray); }

/* 名次徽章 */
.rank-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    font-weight: 700;
    font-size: 13px;
    background: var(--gray-light);
    color: var(--text-light);
}
.rank-1 { background: #fff3c4; color: #8d6e00; border: 1px solid var(--gold); }
.rank-2 { background: #f1f3f4; color: var(--silver); border: 1px solid var(--silver); }
.rank-3 { background: #ffe0c2; color: var(--bronze); border: 1px solid var(--bronze); }

/* 进退步 */
.delta-up { color: var(--success); font-weight: 600; }
.delta-down { color: var(--danger); font-weight: 600; }
.delta-flat { color: var(--gray); }

/* 筛选器 */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin-bottom: 12px;
}
.filter-bar .chip {
    padding: 6px 14px;
    background: var(--white);
    border: 1px solid var(--gray-border);
    border-radius: 20px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}
.filter-bar .chip:hover { border-color: var(--primary); color: var(--primary); }
.filter-bar .chip.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* 表单 */
.form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 12px;
    align-items: end;
}
.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group label {
    font-size: 13px;
    color: var(--text-light);
}
input[type="text"], input[type="number"], input[type="date"], input[type="password"],
select, textarea {
    padding: 8px 12px;
    border: 1px solid var(--gray-border);
    border-radius: var(--radius);
    font-size: 14px;
    background: var(--white);
    color: var(--text);
    font-family: inherit;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* 提示 */
.flash {
    padding: 10px 16px;
    border-radius: var(--radius);
    margin-bottom: 12px;
    font-size: 14px;
}
.flash-success { background: var(--success-light); color: var(--success); border-left: 3px solid var(--success); }
.flash-error { background: var(--danger-light); color: var(--danger); border-left: 3px solid var(--danger); }

/* 实时更新指示 */
.live-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    margin-right: 4px;
    animation: pulse 1.6s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* 顶部概览指标 */
.metric-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}
.metric {
    background: var(--white);
    border-radius: var(--radius);
    padding: 14px;
    box-shadow: var(--shadow);
    text-align: center;
}
.metric-value { font-size: 24px; font-weight: 700; color: var(--primary); }
.metric-label { font-size: 13px; color: var(--text-light); margin-top: 4px; }

/* 时间戳 */
.updated-at {
    font-size: 12px;
    color: var(--gray);
    margin-left: 8px;
}

/* 录入矩阵 */
.record-matrix {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.record-matrix table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.record-matrix th, .record-matrix td {
    padding: 6px;
    border: 1px solid var(--gray-border);
    text-align: center;
}
.record-matrix th {
    background: var(--primary-light);
    position: sticky;
    top: 0;
}
.record-matrix .class-cell {
    text-align: left;
    background: var(--gray-light);
    font-weight: 600;
    white-space: nowrap;
    position: sticky;
    left: 0;
    z-index: 1;
}
.record-matrix input[type="number"] {
    width: 70px;
    padding: 4px 6px;
    text-align: center;
    border: 1px solid transparent;
    background: transparent;
}
.record-matrix input[type="number"]:focus {
    background: white;
    border-color: var(--primary);
}
.record-matrix input[type="text"] {
    width: 100%;
    padding: 4px 6px;
    border: 1px solid transparent;
    background: transparent;
    font-size: 12px;
}
.record-matrix input[type="text"]:focus {
    background: white;
    border-color: var(--primary);
}
.record-matrix tr:hover .class-cell { background: var(--primary-light); }
.record-matrix .has-record {
    background: var(--warning-light);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .container { padding: 12px; }
    .navbar h1 { font-size: 16px; }
    .navbar .nav-links a { padding: 6px 8px; font-size: 13px; }
    .card { padding: 12px; }
    .card-title { font-size: 15px; }
    table.data th, table.data td { padding: 8px 6px; font-size: 13px; }
    .btn { padding: 6px 12px; font-size: 13px; }
    .metric-grid { grid-template-columns: repeat(2, 1fr); }
    .metric-value { font-size: 20px; }
    .form-row { flex-direction: column; align-items: stretch; }
    .form-group { width: 100%; }
    /* 录入矩阵在手机端缩小 */
    .record-matrix input[type="number"] { width: 50px; }
    .record-matrix th, .record-matrix td { padding: 4px 2px; font-size: 12px; }
}

/* 登录页 */
.login-card {
    max-width: 380px;
    margin: 60px auto;
    padding: 28px 24px;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}
.login-card h2 {
    text-align: center;
    margin-bottom: 20px;
    color: var(--primary);
}
.login-card .form-group { margin-bottom: 14px; }
.login-card input { width: 100%; }
.login-card .btn { width: 100%; justify-content: center; padding: 12px; }
.login-card .helper {
    text-align: center;
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-light);
}