/* 设计意图：色值与主站 style.css 的 --openstd-* 深色基线完全对齐，避免教务页与首页出现两套墨黑/酸绿。 */
:root {
    --academic-bg: #080A0A;
    --academic-panel: #151A18;
    --academic-panel-raised: #1D241F;
    --academic-line: rgba(244, 236, 216, 0.18);
    --academic-text: #F4ECD8;
    --academic-muted: rgba(244, 236, 216, 0.72);
    --academic-brand: #9AFC71;
    --academic-cyan: #66E1D6;
    --academic-danger: #FF5C3D;
    --academic-warn: #D2A84F;
    --academic-shadow: 0 18px 48px rgba(0, 0, 0, 0.34);
    --academic-focus: 0 0 0 4px rgba(154, 252, 113, 0.22);
    --academic-hover-tint: rgba(154, 252, 113, 0.045);
    --academic-hover-border: rgba(154, 252, 113, 0.48);
    --academic-active-tint: rgba(154, 252, 113, 0.10);
    --academic-primary-ink: #08100b;
    --academic-row-tint: rgba(244, 236, 216, 0.028);
    --academic-card-veil: linear-gradient(180deg, rgba(244, 236, 216, 0.055), rgba(244, 236, 216, 0.025));
    --academic-soft-tint: rgba(244, 236, 216, 0.035);
}

/* 设计意图：浅色色值与主站 theme-light.css 的 --openstd-* 浅色基线对齐，品牌色统一为赤陶色 #C96442。 */
.theme-light {
    --academic-bg: #FAF9F5;
    --academic-panel: #F0EEE6;
    --academic-panel-raised: #F7F5EE;
    --academic-line: rgba(17, 17, 17, 0.14);
    --academic-text: #15120F;
    --academic-muted: rgba(21, 18, 15, 0.68);
    --academic-brand: #C96442;
    --academic-cyan: #111111;
    --academic-danger: #A23D2E;
    --academic-warn: #A06A1E;
    --academic-shadow: 0 24px 58px rgba(46, 42, 37, 0.14);
    --academic-focus: 0 0 0 4px rgba(201, 100, 66, 0.18);
    --academic-hover-tint: rgba(201, 100, 66, 0.10);
    --academic-hover-border: rgba(201, 100, 66, 0.5);
    --academic-active-tint: rgba(201, 100, 66, 0.15);
    --academic-primary-ink: #fffdf6;
    --academic-row-tint: rgba(17, 17, 17, 0.02);
    --academic-card-veil: linear-gradient(180deg, rgba(255, 255, 252, 0.88), rgba(255, 255, 252, 0.60));
    --academic-soft-tint: rgba(17, 17, 17, 0.03);
    --academic-insert-line: linear-gradient(180deg, #C96442, #A06A1E);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--academic-text);
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background:
        linear-gradient(90deg, rgba(244, 236, 216, 0.04) 1px, transparent 1px) 0 0 / 28px 28px,
        linear-gradient(0deg, rgba(244, 236, 216, 0.035) 1px, transparent 1px) 0 0 / 28px 28px,
        var(--academic-bg);
}

ion {
    cursor: pointer;
}

.hidden {
    display: none !important;
}

.academic-guard {
    max-width: 720px;
    margin: 80px auto;
    border: 1px solid rgba(255, 107, 74, 0.45);
    border-radius: 8px;
    padding: 18px 20px;
    background: rgba(255, 107, 74, 0.10);
    color: var(--academic-danger);
}

.academic-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    overflow: hidden;
}

.academic-layout {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
}

.academic-sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    width: 260px;
    max-width: 260px;
    min-width: 260px;
    border-right: 1px solid var(--academic-line);
    background: rgba(21, 26, 24, 0.96);
    padding: 18px 14px;
    overflow-y: auto;
    overflow-x: hidden;
    transition: transform 180ms ease, width 180ms ease;
}

.theme-light .academic-sidebar {
    background: rgba(255, 255, 252, 0.96);
}

.academic-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 52px;
    color: var(--academic-text);
    text-decoration: none;
    margin-bottom: 20px;
    cursor: default;
}

.academic-brand-mark {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--academic-brand);
    border-radius: 8px;
    color: var(--academic-bg);
    background: var(--academic-brand);
    font-weight: 800;
}

.academic-brand small,
.academic-kicker {
    display: block;
    color: var(--academic-muted);
    font-size: 12px;
    letter-spacing: 0;
}

.academic-nav {
    display: grid;
    gap: 8px;
}

.academic-nav button,
.academic-icon-button,
.academic-primary,
.academic-secondary {
    min-height: 38px;
    border: 1px solid var(--academic-line);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--academic-text);
    background: var(--academic-panel-raised);
    text-decoration: none;
    transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.academic-nav button {
    justify-content: flex-start;
    width: 100%;
    padding: 10px 12px;
    box-sizing: border-box;
}

.academic-nav {
    display: grid;
    gap: 8px;
    width: 100%;
    box-sizing: border-box;
}

.academic-nav button:hover,
.academic-icon-button:hover,
.academic-secondary:hover {
    transform: translateY(-1px);
    border-color: var(--academic-hover-border);
}

.academic-nav button.active {
    border-color: var(--academic-brand);
    color: var(--academic-brand);
    background: var(--academic-active-tint);
}

.academic-nav svg,
.academic-icon-button svg,
.academic-primary svg,
.academic-secondary svg {
    width: 17px;
    height: 17px;
    flex: 0 0 auto;
}

.academic-main {
    min-width: 0;
    padding: 22px;
}

.module-heading,
.student-status-row,
.student-pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.module-heading h2 {
    margin: 4px 0;
    line-height: 1.15;
}

.module-actions,
.advanced-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.academic-icon-button {
    width: 40px;
    height: 40px;
    padding: 0;
}

.academic-primary,
.academic-secondary {
    padding: 8px 12px;
}

.academic-primary {
    border-color: var(--academic-brand);
    background: var(--academic-brand);
    color: var(--academic-primary-ink);
    font-weight: 800;
}

.academic-primary:hover {
    filter: brightness(1.1);
}

.academic-primary:active {
    transform: translateY(0);
    filter: brightness(0.95);
}

.academic-module,
.academic-module-placeholder,
.student-dialog {
    border: 1px solid var(--academic-line);
    border-radius: 8px;
    background: var(--academic-card-veil), var(--academic-panel);
    box-shadow: var(--academic-shadow);
}

.academic-module {
    padding: 16px;
}

.academic-module-placeholder {
    padding: 34px;
    color: var(--academic-muted);
}

.student-toolbar,
.advanced-filters,
.student-form-grid {
    display: grid;
    gap: 10px;
}

.student-toolbar {
    grid-template-columns: minmax(260px, 1fr) auto auto;
    margin-top: 14px;
}

.search-field,
.advanced-filters label,
.student-form-grid label {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.search-field {
    position: relative;
}

.search-field svg {
    position: absolute;
    left: 12px;
    top: 50%;
    width: 16px;
    height: 16px;
    transform: translateY(-50%);
    color: var(--academic-muted);
}

.search-field input {
    padding-left: 38px;
}

input,
select,
textarea {
    width: 100%;
    border: 1px solid var(--academic-line);
    border-radius: 8px;
    background: var(--academic-panel-raised);
    color: var(--academic-text);
    padding: 9px 10px;
}

textarea {
    resize: vertical;
}

label span {
    color: var(--academic-muted);
    font-size: 12px;
    font-weight: 700;
}

.advanced-filters {
    grid-template-columns: repeat(4, minmax(140px, 1fr));
    margin-top: 10px;
    padding: 12px;
    border: 1px solid var(--academic-line);
    border-radius: 8px;
    background: rgba(244, 236, 216, 0.035);
}

.advanced-actions {
    align-items: end;
}

.student-status-row {
    margin: 14px 0 10px;
}

.student-sync-status,
.student-counts {
    color: var(--academic-muted);
    font-size: 13px;
}

.student-counts strong {
    color: var(--academic-brand);
    margin-right: 4px;
}

.student-table-shell {
    overflow: auto;
    border: 1px solid var(--academic-line);
    border-radius: 12px;
    max-height: calc(100vh - 280px);
    background: var(--academic-panel);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
}

.student-table {
    width: 100%;
    min-width: 1720px;
    border-collapse: collapse;
    table-layout: fixed;
    background: var(--academic-panel);
}

.student-table th,
.student-table td {
    padding: 12px 14px;
    text-align: left;
    vertical-align: middle;
    overflow-wrap: anywhere;
    font-size: 13px;
    border-bottom: 8px solid var(--academic-panel);
}

.student-table th {
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--academic-panel-raised);
    color: var(--academic-text);
    font-weight: 800;
    border-bottom: 2px solid var(--academic-brand);
    text-transform: none;
}

/* 表头内容容器：包含图标和文字 */
.student-table th .header-content {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 拖拽图标 */
.student-table th .drag-handle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    color: var(--academic-muted);
    cursor: grab;
    flex-shrink: 0;
}

.student-table th .drag-handle svg {
    width: 100%;
    height: 100%;
}

.student-table th:hover .drag-handle {
    color: var(--academic-brand);
}

.student-table th button {
    border: 0;
    padding: 0;
    color: inherit;
    background: transparent;
    font-weight: 800;
    cursor: pointer;
}

.student-table th button:hover {
    color: var(--academic-brand);
}

.student-card-row {
    cursor: pointer;
}

.student-card-row td {
    border-top: 1px solid var(--academic-line);
    border-bottom: 1px solid var(--academic-line);
    background: var(--academic-row-tint);
    transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

/* 用 td 底部边框模拟行间距 */
.student-card-row td {
    border-bottom: 8px solid var(--academic-panel);
    border-top: none;
    border-left: none;
    border-right: none;
}

/* 第一行和最后一行保持圆角 */
.student-card-row td:first-child {
    border-radius: 8px 0 0 8px;
    border-left: 1px solid var(--academic-line);
}

.student-card-row td:last-child {
    border-radius: 0 8px 8px 0;
    border-right: 1px solid var(--academic-line);
}

/* 每一行的 td 都添加顶部边框 */
.student-card-row td {
    border-top: 1px solid var(--academic-line);
}

/* 奇偶行区分 */
.student-card-row:nth-child(even) td {
    background: rgba(244, 236, 216, 0.06);
}

.theme-light .student-card-row:nth-child(even) td {
    background: rgba(201, 100, 66, 0.03);
}

/* 悬停/选中状态优化：整行背景统一 */
.student-card-row:hover td,
.student-card-row:focus td {
    background: var(--academic-hover-tint);
    border-top-color: var(--academic-hover-border);
    border-left-color: var(--academic-hover-border);
    border-right-color: var(--academic-hover-border);
    border-bottom-color: var(--academic-panel); /* 底部间距条始终保持 panel 色 */
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transform: translateY(-1px);
}

/* 浅色主题专门优化选中行 */
.theme-light .student-card-row:hover td,
.theme-light .student-card-row:focus td {
    background: rgba(201, 100, 66, 0.12);
    border-top-color: rgba(201, 100, 66, 0.6);
    border-left-color: rgba(201, 100, 66, 0.6);
    border-right-color: rgba(201, 100, 66, 0.6);
    border-bottom-color: var(--academic-panel); /* 底部间距条始终保持 panel 色 */
}

.student-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.student-actions button {
    width: 30px;
    height: 30px;
    border: 1px solid var(--academic-line);
    border-radius: 8px;
    color: var(--academic-text);
    background: var(--academic-panel-raised);
}

.student-actions svg {
    width: 15px;
    height: 15px;
}

/* ==================== 列拖拽样式 ==================== */
/* 拖拽中的表格 */
.student-table.dragging th {
    user-select: none;
}

/* 拖拽源列头 */
.student-table th.dragging-source {
    background: var(--academic-panel);
    border: 2px dashed var(--academic-brand);
    border-radius: 6px;
    color: var(--academic-brand);
    transform: scale(1.02);
    box-shadow: 0 4px 14px rgba(0,0,0,0.12);
    z-index: 2;
}

/* 插入位置指示 */
.student-table th.drop-left {
    border-left: 3px solid var(--academic-brand);
}

.student-table th.drop-right {
    border-right: 3px solid var(--academic-brand);
}

/* 插入线 */
.column-insert-line {
    position: fixed;
    top: 0;
    left: 0;
    width: 4px;
    height: 100vh;
    background: var(--academic-insert-line, linear-gradient(180deg, var(--academic-brand), var(--academic-cyan)));
    border-radius: 2px;
    z-index: 1000;
    display: none;
    pointer-events: none;
    box-shadow: 0 0 12px var(--academic-brand);
}

/* 拖拽时列头悬停 */
.student-table th {
    cursor: grab;
}

.student-table th:active {
    cursor: grabbing;
}

.student-state-message {
    border: 1px solid var(--academic-line);
    border-radius: 8px;
    margin-top: 10px;
    padding: 16px;
    color: var(--academic-muted);
    background: rgba(244, 236, 216, 0.035);
}

.student-state-message.error,
.student-form-error {
    color: var(--academic-danger);
}

.student-pagination {
    margin-top: 12px;
}

.student-dialog {
    width: min(980px, calc(100vw - 26px));
    color: var(--academic-text);
    padding: 0;
    border: 1px solid var(--academic-line);
    border-radius: 12px;
    background: var(--academic-card-veil), var(--academic-panel);
    box-shadow: var(--academic-shadow);
    animation: dialog-fade 0.2s ease-out;
}

@keyframes dialog-fade {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.student-dialog::backdrop {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(3px);
}

.student-dialog form {
    padding: 20px 24px;
}

.student-dialog header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--academic-line);
}

.student-dialog header h2 {
    margin: 0;
    font-size: 22px;
}

.student-form-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 14px 0;
}

.student-form-grid .wide {
    grid-column: 1 / -1;
}

/* 查看模式：仅展示核心字段，隐藏其余字段与编辑专用控件 */
.student-form-grid.view-mode label:not(.core-field) {
    display: none;
}

.student-form-grid:not(.view-mode) label.view-only {
    display: none;
}

.student-form-grid.view-mode label.edit-only {
    display: none;
}

/* 查看模式展开：显示全部字段（仍保持只读） */
.student-form-grid.view-mode.detail-mode label:not(.core-field) {
    display: flex;
}

/* 编辑模式：高亮姓名/剩余课时/阶段/年级/授课老师等关键字段 */
.student-form-grid.edit-mode label.key-field {
    background: var(--academic-active-tint);
    border-radius: 8px;
    padding: 8px;
    box-shadow: inset 0 0 0 1px var(--academic-brand);
}

.student-record-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 16px 0 18px;
    padding: 12px;
    border: 1px solid var(--academic-line);
    border-radius: 8px;
    background: var(--academic-soft-tint);
}

.student-record-actions button {
    flex: 1;
    min-width: 140px;
}

.record-dialog {
    width: min(980px, calc(100vw - 26px));
}

.record-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.record-count-hint {
    color: var(--academic-muted);
    font-size: 13px;
}

.record-table-shell {
    overflow-x: auto;
    border: 1px solid var(--academic-line);
    border-radius: 8px;
    max-height: 360px;
    overflow-y: auto;
}

.record-table {
    width: 100%;
    border-collapse: collapse;
}

.record-table th,
.record-table td {
    padding: 9px 10px;
    text-align: left;
    border-bottom: 1px solid var(--academic-line);
    white-space: nowrap;
    font-size: 13px;
}

.record-table th {
    color: var(--academic-muted);
    font-weight: 600;
    position: sticky;
    top: 0;
    background: var(--academic-panel);
}

.record-table tbody tr:hover {
    background: var(--academic-hover-tint);
}

.record-table .record-actions {
    display: flex;
    gap: 6px;
}

.record-table .record-actions button {
    background: transparent;
    border: 1px solid var(--academic-line);
    border-radius: 6px;
    color: var(--academic-text);
    padding: 4px 6px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
}

.record-table .record-actions button:hover {
    border-color: var(--academic-brand);
    color: var(--academic-brand);
}

.record-form-area {
    margin-top: 16px;
    padding: 16px;
    border: 1px solid var(--academic-line);
    border-radius: 8px;
    background: var(--academic-soft-tint);
}

.record-form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 12px;
}

.student-form-error {
    color: var(--academic-danger);
    margin: 8px 0;
    padding: 8px 12px;
    border: 1px solid var(--academic-danger);
    border-radius: 8px;
    background: rgba(255, 92, 61, 0.1);
}

.student-dialog footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
    padding-top: 14px;
    border-top: 1px solid var(--academic-line);
}

.academic-sidebar-toggle {
    display: none;
    position: fixed;
    right: 14px;
    bottom: 14px;
    z-index: 20;
    width: 42px;
    height: 42px;
    border: 1px solid var(--academic-line);
    border-radius: 8px;
    color: var(--academic-text);
    background: var(--academic-panel-raised);
}

.academic-sidebar-toggle svg {
    width: 19px;
    height: 19px;
}

/* 键盘焦点：仅对键盘导航显示品牌色轮廓，不干扰鼠标点击体验。 */
.academic-nav button:focus-visible,
.academic-icon-button:focus-visible,
.academic-primary:focus-visible,
.academic-secondary:focus-visible,
.student-actions button:focus-visible,
.academic-brand:focus-visible,
.student-card-row:focus-visible {
    outline: 2px solid var(--academic-brand);
    outline-offset: 2px;
}

@media (max-width: 1120px) {
    .student-form-grid,
    .advanced-filters {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 860px) {
    .academic-shell {
        grid-template-columns: minmax(0, 1fr);
    }

    .academic-sidebar-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .academic-sidebar {
        position: fixed;
        z-index: 15;
        width: 260px;
        transform: translateX(0);
    }

    .academic-shell.sidebar-collapsed .academic-sidebar {
        transform: translateX(-105%);
    }

    .academic-main {
        padding: 16px;
    }

    .module-heading,
    .student-status-row,
    .student-pagination {
        align-items: flex-start;
        flex-direction: column;
    }

    .student-toolbar {
        grid-template-columns: 1fr;
    }

    .student-form-grid,
    .advanced-filters {
        grid-template-columns: 1fr;
    }
}