:root {
    --agent-primary: #7c3aed;
    --agent-primary-dark: #5b21b6;
    --agent-primary-soft: #f3ecff;
    --agent-text: #1f2430;
    --agent-muted: #7a8194;
    --agent-border: #e8e2f3;
    --agent-bg: #f7f5fb;
    --agent-sidebar: #ffffff;
    --agent-danger: #e5484d;
    --el-color-primary: #7c3aed;
    --el-color-primary-light-3: #a78bfa;
    --el-color-primary-light-5: #c4b5fd;
    --el-color-primary-light-7: #ddd6fe;
    --el-color-primary-light-8: #ede9fe;
    --el-color-primary-light-9: #f5f3ff;
    --el-color-primary-dark-2: #5b21b6;
    --el-border-radius-base: 6px;
}

* {
    box-sizing: border-box;
}

html,
body,
#app {
    width: 100%;
    min-height: 100%;
    margin: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--agent-text);
    background: var(--agent-bg);
}

a {
    color: inherit;
    text-decoration: none;
}

.boot-screen {
    min-height: 100vh;
    display: grid;
    place-items: center;
    color: var(--agent-primary);
    font-size: 15px;
}

.login-page {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(360px, 520px) 1fr;
    background: radial-gradient(circle at 80% 20%, #ede9fe 0, transparent 36%), #fbfaff;
}

.login-panel {
    padding: 64px 58px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: #fff;
    border-right: 1px solid var(--agent-border);
}

.login-art {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 56px;
}

.brand-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 34px;
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    color: #fff;
    font-weight: 800;
    background: linear-gradient(135deg, #7c3aed, #b56bff);
    box-shadow: 0 12px 28px rgba(124, 58, 237, .22);
}

.brand-logo-box {
    overflow: hidden;
}

.brand-logo-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #fff;
}

.brand-name {
    margin: 0;
    font-size: 24px;
    line-height: 1.2;
}

.brand-sub {
    margin: 5px 0 0;
    color: var(--agent-muted);
    font-size: 13px;
}

.login-title {
    margin: 0 0 8px;
    font-size: 30px;
    letter-spacing: 0;
}

.login-desc {
    margin: 0 0 30px;
    color: var(--agent-muted);
}

.console-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 252px 1fr;
}

.side {
    background: var(--agent-sidebar);
    border-right: 1px solid var(--agent-border);
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.side-brand {
    height: 70px;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 22px;
    border-bottom: 1px solid var(--agent-border);
}

.side-scroll {
    overflow-y: auto;
    padding: 14px 10px 18px;
}

.side-group-title {
    color: #9aa0ae;
    font-size: 12px;
    padding: 18px 14px 8px;
}

.side-item {
    min-height: 42px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 12px;
    color: #393d49;
    cursor: pointer;
    margin-bottom: 4px;
    font-size: 14px;
}

.side-item:hover {
    background: var(--agent-primary-soft);
    color: var(--agent-primary);
}

.side-item.active {
    color: #fff;
    background: linear-gradient(135deg, #6d28d9, #a855f7);
    box-shadow: 0 12px 24px rgba(124, 58, 237, .22);
}

.main {
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.topbar {
    height: 70px;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--agent-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 26px;
    position: sticky;
    top: 0;
    z-index: 8;
}

.page {
    padding: 24px 30px 44px;
}

.page-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}

.page-title {
    margin: 0;
    font-size: 26px;
    line-height: 1.25;
}

.page-desc {
    margin: 6px 0 0;
    color: var(--agent-muted);
    font-size: 13px;
}

.permission-alert {
    margin-bottom: 16px;
}

.form-help {
    margin-left: 8px;
    color: var(--agent-muted);
}

.panel {
    background: #fff;
    border: 1px solid var(--agent-border);
    border-radius: 8px;
    padding: 18px;
}

.student-profile {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 4px 0 20px;
}

.student-profile h3 {
    margin: 0 0 6px;
    font-size: 20px;
}

.student-profile p {
    margin: 0;
    color: var(--agent-muted);
}

.pay-result {
    margin-top: 18px;
    padding: 18px;
    border: 1px solid var(--agent-border);
    border-radius: 6px;
    background: #fff;
    max-width: 360px;
}

.pay-result h3 {
    margin: 0 0 8px;
    font-size: 17px;
}

.pay-result p {
    margin: 0 0 12px;
    color: var(--agent-muted);
}

.pay-result img {
    width: 220px;
    height: 220px;
    object-fit: contain;
}

.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 16px;
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.stat {
    background: #fff;
    border: 1px solid var(--agent-border);
    border-radius: 8px;
    padding: 18px;
}

.stat-label {
    color: var(--agent-muted);
    font-size: 13px;
}

.stat-value {
    margin-top: 8px;
    font-size: 26px;
    font-weight: 700;
}

.form-shell {
    background: #fff;
    border: 1px solid var(--agent-border);
    border-radius: 8px;
    padding: 0;
    overflow: hidden;
}

.form-section {
    padding: 22px 26px;
    border-bottom: 1px solid var(--agent-border);
}

.form-section:last-child {
    border-bottom: 0;
}

.form-section-title {
    margin: 0 0 18px;
    font-size: 18px;
}

.chapter-row {
    border: 1px solid var(--agent-border);
    border-radius: 6px;
    padding: 14px;
    margin-bottom: 10px;
    background: #fcfbff;
}

.chapter-items {
    margin-top: 12px;
    padding: 12px;
    border-radius: 6px;
    background: #fff;
    border: 1px dashed #d7c8ef;
}

.chapter-item-row {
    padding: 12px 0;
    border-bottom: 1px solid #f0ecf7;
}

.chapter-item-row:last-child {
    border-bottom: 0;
}

.upload-line {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.upload-card {
    width: 132px;
    height: 92px;
    border: 1px dashed #cdbdf0;
    border-radius: 6px;
    background: #fbf9ff;
    color: var(--agent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    overflow: hidden;
}

.upload-card:hover {
    border-color: var(--agent-primary);
}

.upload-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.readonly-tag {
    margin-left: 8px;
}

.empty-note {
    color: var(--agent-muted);
    padding: 28px;
    text-align: center;
}

.mobile-menu-btn {
    display: none;
}

.el-button--primary {
    --el-button-bg-color: var(--agent-primary);
    --el-button-border-color: var(--agent-primary);
    --el-button-hover-bg-color: var(--agent-primary-dark);
    --el-button-hover-border-color: var(--agent-primary-dark);
    --el-button-active-bg-color: var(--agent-primary-dark);
    --el-button-active-border-color: var(--agent-primary-dark);
}

.el-menu {
    border-right: 0;
}

.el-table th.el-table__cell {
    background: #fbf9ff;
    color: #303443;
}

@media (max-width: 960px) {
    .login-page {
        grid-template-columns: 1fr;
    }
    .login-art {
        display: none;
    }
    .console-shell {
        grid-template-columns: 1fr;
    }
    .side {
        position: fixed;
        left: 0;
        top: 0;
        z-index: 20;
        transform: translateX(-100%);
        transition: transform .18s ease;
        width: 252px;
    }
    .side.open {
        transform: translateX(0);
    }
    .mobile-menu-btn {
        display: inline-flex;
    }
    .stat-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .page {
        padding: 18px;
    }
}

@media (max-width: 620px) {
    .login-panel {
        padding: 34px 22px;
    }
    .stat-grid {
        grid-template-columns: 1fr;
    }
    .toolbar,
    .page-head {
        align-items: stretch;
        flex-direction: column;
    }
}