/* ============================================================
   人脸识别课堂签到系统 - 全局样式
   深蓝科技风 #0a0e27 背景 + 粒子动画 + 毛玻璃卡片
   ============================================================ */

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

:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #131838;
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.12);
    --text-primary: #ffffff;
    --text-secondary: #b8c2e0;
    --text-muted: #6b7394;
    --accent: #4f8cff;
    --accent-2: #6c5ce7;
    --success: #2ecc71;
    --danger: #e74c3c;
    --warning: #f39c12;
    --radius: 14px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --gradient: linear-gradient(135deg, #4f8cff 0%, #6c5ce7 100%);
}

html, body {
    width: 100%;
    min-height: 100vh;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    overflow-x: hidden;
}

#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ------------------------------------------------------------
   导航栏
   ------------------------------------------------------------ */
.navbar {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    margin: 16px;
    border-radius: var(--radius);
}

.nav-brand {
    font-size: 18px;
    font-weight: 600;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.25s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: rgba(79, 140, 255, 0.18);
}

/* ------------------------------------------------------------
   毛玻璃卡片
   ------------------------------------------------------------ */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.container {
    position: relative;
    z-index: 5;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 16px 40px;
}

.checkin-card,
.login-card {
    padding: 32px 28px;
    margin-top: 16px;
}

.page-title {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 8px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 24px;
}

.page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}
.page-header .page-title { margin-bottom: 4px; }

/* ------------------------------------------------------------
   表单
   ------------------------------------------------------------ */
.form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-group input,
.filter-bar input,
.filter-bar select {
    width: 100%;
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 15px;
    outline: none;
    transition: all 0.2s ease;
}

.form-group input:focus,
.filter-bar input:focus,
.filter-bar select:focus {
    border-color: var(--accent);
    background: rgba(79, 140, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.15);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

/* ------------------------------------------------------------
   按钮
   ------------------------------------------------------------ */
.btn-primary,
.btn-ghost,
.btn-danger {
    cursor: pointer;
    border: none;
    border-radius: 10px;
    padding: 12px 22px;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.25s ease;
    font-family: inherit;
}

.btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 4px 14px rgba(79, 140, 255, 0.35);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(79, 140, 255, 0.5);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}

.btn-ghost:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
}

.btn-ghost:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-danger {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: #fff;
}

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
}

.btn-block {
    width: 100%;
    margin-top: 6px;
}

.btn-sm {
    padding: 8px 14px;
    font-size: 13px;
}

.btn-group {
    display: flex;
    gap: 10px;
    margin-top: 14px;
    flex-wrap: wrap;
}

/* ------------------------------------------------------------
   摄像头
   ------------------------------------------------------------ */
.camera-wrap {
    position: relative;
    width: 100%;
    max-width: 480px;
    aspect-ratio: 4 / 3;
    margin: 0 auto;
    border-radius: var(--radius);
    overflow: hidden;
    background: #000;
    border: 1px solid var(--glass-border);
}

.camera-wrap video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* 镜像 */
    transform: scaleX(-1);
}

.camera-mask {
    position: absolute;
    inset: 0;
    pointer-events: none;
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
}

.scan-line {
    position: absolute;
    left: 5%;
    right: 5%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    animation: scan 2.4s ease-in-out infinite;
    box-shadow: 0 0 12px var(--accent);
}

@keyframes scan {
    0%   { top: 10%; opacity: 0.2; }
    50%  { top: 90%; opacity: 1; }
    100% { top: 10%; opacity: 0.2; }
}

.preview-wrap {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
}

.preview-wrap img {
    width: 100%;
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
}

/* ------------------------------------------------------------
   结果框
   ------------------------------------------------------------ */
.result-box {
    margin-top: 20px;
    padding: 16px 18px;
    border-radius: 12px;
    font-size: 14px;
    animation: fadeIn 0.3s ease;
}

.result-success {
    background: rgba(46, 204, 113, 0.12);
    border: 1px solid rgba(46, 204, 113, 0.4);
}

.result-fail {
    background: rgba(243, 156, 18, 0.12);
    border: 1px solid rgba(243, 156, 18, 0.4);
}

.result-error {
    background: rgba(231, 76, 60, 0.12);
    border: 1px solid rgba(231, 76, 60, 0.4);
}

.result-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    color: var(--text-secondary);
}

.result-row b {
    color: var(--text-primary);
}

.result-tip {
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: 6px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ------------------------------------------------------------
   学生卡片网格
   ------------------------------------------------------------ */
.filter-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-bar input { flex: 1; min-width: 160px; }
.filter-bar select {
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    cursor: pointer;
}

.student-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.student-card {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: transform 0.2s ease;
}

.student-card:hover {
    transform: translateY(-2px);
}

.student-photo {
    width: 100%;
    aspect-ratio: 4 / 3;
    border-radius: 10px;
    overflow: hidden;
    background: #000;
}

.student-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* 预览图也镜像保持一致 */
    transform: scaleX(-1);
}

.student-info {
    flex: 1;
}

.student-name {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.student-meta {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.student-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* 状态徽章 */
.status-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 500;
}

.badge-ok   { background: rgba(46, 204, 113, 0.18); color: #2ecc71; }
.badge-warn { background: rgba(243, 156, 18, 0.18); color: #f39c12; }
.badge-fail { background: rgba(231, 76, 60, 0.18); color: #e74c3c; }

/* ------------------------------------------------------------
   表格
   ------------------------------------------------------------ */
.table-wrap {
    overflow-x: auto;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 640px;
}

.data-table thead {
    background: rgba(79, 140, 255, 0.1);
}

.data-table th,
.data-table td {
    padding: 12px 14px;
    text-align: left;
    font-size: 14px;
    border-bottom: 1px solid var(--glass-border);
}

.data-table th {
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.data-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

.data-table td {
    color: var(--text-primary);
}

/* ------------------------------------------------------------
   分页
   ------------------------------------------------------------ */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-top: 20px;
}

.page-info {
    color: var(--text-secondary);
    font-size: 14px;
}

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

/* ------------------------------------------------------------
   加载遮罩
   ------------------------------------------------------------ */
.loading-mask {
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 39, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    gap: 14px;
}

.loading-mask p {
    color: var(--text-secondary);
    font-size: 14px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.15);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ------------------------------------------------------------
   移动端适配
   ------------------------------------------------------------ */
@media (max-width: 640px) {
    .navbar {
        flex-direction: column;
        gap: 10px;
        padding: 12px 16px;
    }
    .nav-links {
        width: 100%;
        justify-content: center;
    }
    .checkin-card,
    .login-card {
        padding: 22px 18px;
    }
    .page-title {
        font-size: 22px;
    }
    .student-grid {
        grid-template-columns: 1fr;
    }
    .btn-group {
        flex-direction: column;
    }
    .btn-group button {
        width: 100%;
    }
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
}