/* ========== Base ========== */
*, *::before, *::after { box-sizing: border-box; }

html, body {
    height: 100%;
    width: 100%;
    margin: 0;
    padding: 0;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-family: "SF Pro SC", "PingFang SC", "Microsoft Yahei", "Helvetica Neue", Arial, sans-serif;
    font-weight: 400;
    background: linear-gradient(135deg, #e8f0fe 0%, #f5f7ff 40%, #ffffff 100%);
    min-height: 100vh;
    color: #333;
}

a { color: #4a6cf7; text-decoration: none; transition: color .2s; }
a:hover { color: #3451d1; }

/* ========== Nav ========== */
.site-nav {
    background: #fff;
    box-shadow: 0 1px 8px rgba(0,0,0,.06);
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    height: 56px;
}

.site-nav .nav-brand {
    font-size: 18px;
    font-weight: 600;
    color: #1a1a2e;
    display: flex;
    align-items: center;
    gap: 8px;
}

.site-nav .nav-brand .brand-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4a6cf7, #6c5ce7);
    display: inline-block;
}

/* ========== Container ========== */
.main-container {
    max-width: 680px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

/* ========== Card ========== */
.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,.06);
    margin-bottom: 20px;
    overflow: hidden;
    transition: box-shadow .25s, transform .25s;
}
.card:hover {
    box-shadow: 0 6px 24px rgba(74,108,247,.12);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    color: #fff;
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 500;
    letter-spacing: .5px;
}

.card-body { padding: 20px; }

/* ========== Search Box ========== */
.search-group {
    display: flex;
    align-items: stretch;
    border: 2px solid #e0e6f0;
    border-radius: 10px;
    overflow: hidden;
    transition: border-color .2s, box-shadow .2s;
    margin-bottom: 16px;
}

.search-group:focus-within {
    border-color: #4a6cf7;
    box-shadow: 0 0 0 3px rgba(74,108,247,.15);
}

.search-group .search-label {
    background: #f5f7ff;
    padding: 10px 16px;
    font-size: 14px;
    color: #555;
    white-space: nowrap;
    display: flex;
    align-items: center;
    border-right: 2px solid #e0e6f0;
}

.search-group input {
    flex: 1;
    border: none;
    outline: none;
    padding: 10px 14px;
    font-size: 15px;
    background: transparent;
}

.btn-query {
    display: block;
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #4a6cf7, #6c5ce7);
    color: #fff;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity .2s, transform .15s;
    letter-spacing: 1px;
}

.btn-query:hover { opacity: .9; }
.btn-query:active { transform: scale(.98); }

/* ========== Info Table ========== */
.info-table { width: 100%; border-collapse: collapse; }
.info-table th {
    background: #f5f7ff;
    padding: 10px 14px;
    font-size: 13px;
    color: #666;
    font-weight: 500;
    text-align: left;
}
.info-table td {
    padding: 10px 14px;
    font-size: 14px;
    border-top: 1px solid #f0f0f5;
}
/* ========== Course Card ========== */
.course-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,.05);
    margin-bottom: 16px;
    overflow: hidden;
    transition: box-shadow .25s, transform .25s;
}

.course-card:hover {
    box-shadow: 0 4px 20px rgba(74,108,247,.1);
    transform: translateY(-1px);
}

.course-card .course-body {
    padding: 18px 20px;
}

.course-card .course-name {
    font-size: 16px;
    font-weight: 600;
    color: #1a1a2e;
    margin: 0 0 14px;
    line-height: 1.4;
}

.course-card .course-meta {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 6px 12px;
    font-size: 13px;
    color: #666;
    margin-bottom: 14px;
}

.course-card .meta-label {
    color: #999;
    font-weight: 500;
}

.course-card .meta-value { color: #333; }

/* ========== Progress Bar ========== */
.progress-wrap {
    background: #f0f0f5;
    border-radius: 20px;
    height: 10px;
    overflow: hidden;
    margin-bottom: 14px;
}

.progress-bar {
    height: 100%;
    border-radius: 20px;
    background: linear-gradient(90deg, #4a6cf7, #6c5ce7);
    transition: width .6s ease;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,.3) 50%, transparent 100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ========== Action Buttons ========== */
.action-btns {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    padding-top: 4px;
}

.btn-action {
    padding: 6px 14px;
    border: none;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity .2s, transform .15s;
}

.btn-action:hover { opacity: .85; }
.btn-action:active { transform: scale(.95); }

.btn-sync {
    background: linear-gradient(135deg, #00b894, #00cec9);
    color: #fff;
}

.btn-refresh {
    background: linear-gradient(135deg, #e17055, #d63031);
    color: #fff;
}

.btn-log {
    background: linear-gradient(135deg, #fdcb6e, #e17055);
    color: #fff;
}
/* ========== Status Badge ========== */
.status-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-done { background: #e6f9f0; color: #00b894; }
.status-doing { background: #e8f0fe; color: #4a6cf7; }
.status-wait { background: #fff3e0; color: #e17055; }

/* ========== Footer ========== */
.site-footer {
    text-align: center;
    padding: 20px 16px;
    font-size: 12px;
    color: #bbb;
}

/* ========== Responsive ========== */
@media (max-width: 480px) {
    .main-container { padding: 16px 10px 32px; }
    .card-body { padding: 16px; }
    .course-card .course-body { padding: 14px 16px; }
    .course-card .course-meta { grid-template-columns: 1fr; gap: 4px; }
    .course-card .meta-label { display: inline; }
    .course-card .meta-value { display: inline; }
    .action-btns { justify-content: center; }
    .search-group { flex-direction: column; }
    .search-group .search-label {
        border-right: none;
        border-bottom: 2px solid #e0e6f0;
        justify-content: center;
    }
    .site-nav { padding: 0 12px; }
}

@media (min-width: 481px) and (max-width: 768px) {
    .main-container { padding: 20px 14px 36px; }
}

/* ========== Layer Override ========== */
.layui-layer { border-radius: 12px !important; overflow: hidden; }
.layui-layer-title {
    background: linear-gradient(135deg, #1a1a2e, #16213e) !important;
    color: #fff !important;
    border: none !important;
}
.layui-layer-btn a { border-radius: 8px !important; }