/* =============================================
   会议签到系统 - 样式表
   ============================================= */

:root {
    --primary: #4361ee;
    --primary-dark: #3a0ca3;
    --success: #06d6a0;
    --warning: #ffd166;
    --danger: #ef476f;
    --info: #118ab2;
    --dark: #1a1a2e;
    --gray-50: #f8f9fa;
    --gray-100: #e9ecef;
    --gray-200: #dee2e6;
    --gray-300: #ced4da;
    --gray-400: #adb5bd;
    --gray-500: #6c757d;
    --gray-600: #495057;
    --gray-700: #343a40;
    --gray-800: #212529;
    --radius: 12px;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --transition: all 0.2s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

/* ========== 布局 ========== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-sm { max-width: 480px; margin: 0 auto; padding: 0 20px; }

.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-100);
}

.card-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
}

/* ========== 导航 ========== */
.navbar {
    background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 56px;
}

.navbar-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-nav {
    display: flex;
    gap: 4px;
    list-style: none;
}

.navbar-nav a {
    display: block;
    padding: 8px 16px;
    color: var(--gray-600);
    text-decoration: none;
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
}

.navbar-nav a:hover,
.navbar-nav a.active {
    background: var(--primary);
    color: #fff;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--gray-600);
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: var(--gray-800); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-info { background: var(--info); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(67,97,238,0.05); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-block { width: 100%; }

.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* ========== 表单 ========== */
.form-group { margin-bottom: 16px; }

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
    background: #fff;
    color: var(--gray-800);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67,97,238,0.15);
}

.form-control::placeholder { color: var(--gray-400); }

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

.form-hint {
    font-size: 12px;
    color: var(--gray-500);
    margin-top: 4px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

/* ========== 表格 ========== */
.table-wrap { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

table th, table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-100);
}

table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-600);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

table tr:hover td { background: rgba(67,97,238,0.03); }

/* ========== 标签 ========== */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success { background: rgba(6,214,160,0.15); color: #059669; }
.badge-warning { background: rgba(255,209,102,0.2); color: #92400e; }
.badge-danger { background: rgba(239,71,111,0.15); color: #e11d48; }
.badge-info { background: rgba(17,138,178,0.15); color: #0369a1; }
.badge-gray { background: var(--gray-100); color: var(--gray-600); }

/* ========== 统计卡片 ========== */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-card .stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--gray-500);
    margin-top: 4px;
}

.stat-card.danger .stat-value { color: var(--danger); }
.stat-card.success .stat-value { color: var(--success); }
.stat-card.warning .stat-value { color: var(--warning); }
.stat-card.info .stat-value { color: var(--info); }

/* ========== QR码展示 ========== */
.qr-display {
    text-align: center;
    padding: 30px;
}

.qr-display canvas,
.qr-display img {
    max-width: 280px;
    border: 8px solid #fff;
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
}

.qr-countdown {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary);
    margin: 16px 0;
}

.qr-countdown.warning { color: var(--warning); }
.qr-countdown.danger { color: var(--danger); }

.qr-seq {
    font-size: 13px;
    color: var(--gray-500);
}

/* ========== 签到页面 ========== */
.checkin-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.checkin-card {
    background: #fff;
    border-radius: 20px;
    padding: 40px 32px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
}

.checkin-card h1 {
    font-size: 22px;
    text-align: center;
    margin-bottom: 8px;
    color: var(--dark);
}

.checkin-card .meeting-info {
    text-align: center;
    color: var(--gray-500);
    font-size: 14px;
    margin-bottom: 24px;
}

.checkin-result {
    text-align: center;
    padding: 30px 0;
}

.checkin-result .icon {
    font-size: 64px;
    margin-bottom: 16px;
}

.checkin-result .msg {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.checkin-result .detail {
    font-size: 14px;
    color: var(--gray-500);
}

/* ========== 模态框 ========== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.modal-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: #fff;
    border-radius: var(--radius);
    width: 100%;
    max-width: 560px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    transition: transform 0.2s;
}

.modal-overlay.show .modal { transform: scale(1); }

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
    flex-shrink: 0;
}

.modal-header h3 { font-size: 18px; }

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--gray-400);
    padding: 4px;
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}
.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--gray-100);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    flex-shrink: 0;
}

/* ========== 提示 ========== */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 14px 20px;
    border-radius: 8px;
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    z-index: 9999;
    transform: translateX(120%);
    transition: transform 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.toast.show { transform: translateX(0); }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: var(--warning); color: var(--gray-800); }
.toast-info { background: var(--info); }

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-400);
}

.empty-state .icon { font-size: 48px; margin-bottom: 16px; }
.empty-state p { font-size: 15px; }

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-500); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: #d97706; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.hidden { display: none !important; }

/* ========== 登录页 ========== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.login-card {
    background: #fff;
    border-radius: 20px;
    padding: 48px 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}

.login-card h1 {
    text-align: center;
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--dark);
}

.login-card .subtitle {
    text-align: center;
    color: var(--gray-500);
    font-size: 14px;
    margin-bottom: 32px;
}

/* ========== Tab切换栏 ========== */
.tab-bar {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
    background: #f8f9fa;
    padding: 4px;
    border-radius: 8px;
    width: fit-content;
}

.tab-btn {
    padding: 8px 20px;
    border: none;
    background: transparent;
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
}

.tab-btn.active {
    background: white;
    color: var(--primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .form-row { grid-template-columns: 1fr; }
    .navbar-nav { display: none; }
    .stat-cards { grid-template-columns: repeat(2, 1fr); }
    table { font-size: 13px; }
    table th, table td { padding: 8px 12px; }
    .card { padding: 16px; }
}

@media (max-width: 480px) {
    .stat-cards { grid-template-columns: 1fr; }
    .checkin-card { padding: 30px 24px; }
}