:root {
  --paper: #f4f1ea;
  --surface: #fffefa;
  --surface-soft: #f8f5ef;
  --ink: #211d1a;
  --muted: #625b54;
  --line: #ddd5c9;
  --line-strong: #c9bdad;
  --wine: #4b1718;
  --wine-soft: #712c2e;
  --indigo: #173e51;
  --gold: #9c7440;
  --green: #277153;
  --orange: #b9672b;
  --danger: #9a3033;
  --shadow: 0 10px 28px rgba(47, 32, 23, .08);
  --sans: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  --serif: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-weight: 500;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
button, input, select, textarea { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.login-shell { min-height: 100vh; display: grid; grid-template-columns: minmax(420px, .9fr) minmax(430px, 1.1fr); background: var(--surface); }
.login-hero { padding: clamp(42px, 8vw, 110px); color: #f8ecdc; background: var(--wine); }
.login-emblem { width: 76px; height: 76px; display: grid; place-items: center; margin-bottom: 42px; border: 1px solid rgba(255,255,255,.45); border-radius: 50%; }
.login-emblem span { font-size: 22px; letter-spacing: .08em; }
.eyebrow { color: var(--gold); font: 700 11px/1.4 var(--sans); letter-spacing: .18em; }
.login-hero h1 { margin: 16px 0 22px; font-size: clamp(44px, 7vw, 80px); font-weight: 700; line-height: 1.08; }
.login-hero p { max-width: 620px; color: rgba(255,255,255,.7); font: 15px/2 var(--sans); }
.news-list { max-width: 650px; margin-top: 52px; border-top: 1px solid rgba(255,255,255,.2); }
.news-item { padding: 15px 0; border-bottom: 1px solid rgba(255,255,255,.16); }
.news-item strong, .news-item small { display: block; }
.news-item small { margin-top: 5px; color: rgba(255,255,255,.55); font: 11px var(--sans); }
.login-panel { display: grid; align-content: center; padding: clamp(30px, 7vw, 100px); }
.login-card { width: min(440px, 100%); margin: auto; }
.login-card h2 { margin: 8px 0; font-size: 30px; }
.login-card > p { margin-bottom: 30px; color: var(--muted); font: 13px/1.8 var(--sans); }
.login-links { display: flex; justify-content: space-between; margin-top: 16px; color: var(--wine-soft); font: 12px var(--sans); }

.app-layout { min-height: 100vh; display: grid; grid-template-columns: 212px minmax(0, 1fr); }
.app-sidebar { position: fixed; z-index: 10; inset: 0 auto 0 0; width: 212px; overflow-y: auto; color: #f5e9dc; background: var(--wine); scrollbar-color: rgba(255,255,255,.18) transparent; }
.brand { padding: 23px 21px 20px; border-bottom: 1px solid rgba(255,255,255,.15); }
.brand strong { display: block; font-size: 21px; letter-spacing: .14em; }
.brand span { color: rgba(255,255,255,.75); font: 500 11px/1.7 var(--sans); }
.role-card { margin: 17px 11px 12px; padding: 13px 10px; text-align: center; border-bottom: 1px solid rgba(255,255,255,.16); }
.identity-seal { width: 42px; height: 42px; display: grid; place-items: center; margin: 0 auto 9px; border: 1px solid rgba(255,255,255,.45); border-radius: 50%; color: #f4d7b5; font-size: 20px; }
.role-card strong, .role-card small { display: block; }
.role-card strong { margin-bottom: 5px; font-size: 14px; }
.role-card small { color: rgba(255,255,255,.76); font: 500 11px/1.6 var(--sans); }
.nav-group { padding: 6px 10px 10px; }
.nav-label { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 9px 10px 6px; border: 0; color: #d2b58d; background: transparent; cursor: pointer; font: 700 10px var(--sans); letter-spacing: .11em; }
.nav-label b { font-size: 15px; font-weight: 500; }
.nav-items { display: grid; }
.nav-group.collapsed { padding-bottom: 3px; }
.nav-group.collapsed .nav-items { display: none; }
.nav-link { width: 100%; padding: 9px 11px; border: 0; border-left: 2px solid transparent; text-align: left; color: rgba(255,255,255,.85); background: transparent; cursor: pointer; font: 500 13px var(--sans); }
.nav-link:hover, .nav-link.active { border-left-color: #d6b184; color: #fff; background: rgba(255,255,255,.09); }
.collapse-note { width: calc(100% - 20px); margin: 12px 10px 20px; padding: 12px 10px; border: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.66); background: transparent; cursor: pointer; font: 10px var(--sans); }

.app-main { grid-column: 2; min-width: 0; background: var(--surface); }
.topbar { position: sticky; z-index: 8; top: 0; display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 64px; padding: 9px 22px; border-bottom: 1px solid var(--line); background: rgba(255,254,250,.97); }
.topbar-left, .topbar-actions, .action-row, .filters, .tabs, .view-tabs, .section-toolbar { display: flex; align-items: center; gap: 9px; }
.breadcrumb { margin-bottom: 4px; color: var(--muted); font: 500 11px var(--sans); }
.topbar-left strong { font-size: 15px; }
.topbar-actions { margin-left: auto; }
.global-search { width: min(300px, 26vw); padding: 9px 12px; border: 1px solid var(--line); background: var(--surface-soft); font: 11px var(--sans); }
.utility-button { border: 0; color: var(--ink); background: transparent; cursor: pointer; font: 11px var(--sans); }
.utility-button b { display: inline-grid; min-width: 17px; height: 17px; place-items: center; border-radius: 50%; color: #fff; background: var(--danger); font-size: 9px; }
.topbar select { padding: 8px; border: 1px solid var(--line); background: var(--surface); font: 11px var(--sans); }
.avatar { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--wine-soft); }
.menu-button { display: none; }

.page { padding: clamp(20px, 2.8vw, 40px); background: var(--surface); }
.research-page { padding-top: 22px; }
.page-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 21px; }
.page-header h1 { margin: 5px 0 5px; font-size: clamp(27px, 3vw, 40px); font-weight: 700; }
.page-header p { margin: 0; color: var(--muted); font: 500 13px/1.7 var(--sans); }
.view-tabs { margin: -7px 0 18px; font: 11px var(--sans); }
.view-tabs button { padding: 7px 11px; border: 1px solid var(--line); color: var(--ink); background: var(--surface); cursor: pointer; }
.view-tabs button.active { color: #fff; border-color: var(--indigo); background: var(--indigo); }

.research-grid { display: grid; grid-template-columns: 260px minmax(520px, 1fr) 300px; gap: 14px; align-items: start; }
.dossier-panel, .research-core, .action-panel { display: grid; gap: 14px; min-width: 0; }
.grid { display: grid; gap: 15px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { min-width: 0; overflow: hidden; padding: 17px; border: 1px solid var(--line); background: var(--surface); box-shadow: 0 2px 10px rgba(47,32,23,.035); }
.card h2, .card h3 { margin: 0 0 13px; }
.card-title { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.card-title h2 { margin: 0; font-size: 17px; font-weight: 700; }
.card-link { padding: 0; border: 0; color: var(--wine-soft); background: transparent; cursor: pointer; font: 10px var(--sans); }
.muted, .table-note { color: var(--muted); font: 11px/1.7 var(--sans); }

.metric { min-height: 116px; }
.metric-label { color: var(--muted); font: 10px var(--sans); }
.metric-value { margin: 9px 0 4px; color: var(--wine-soft); font-size: 30px; }
.metric-note { color: var(--green); font: 10px var(--sans); }
.metric-strip { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.metric-strip > div { padding: 2px 17px 4px; border-right: 1px solid var(--line); }
.metric-strip > div:first-child { padding-left: 0; }
.metric-strip > div:last-child { border-right: 0; }
.metric-strip span, .metric-strip em { display: block; color: var(--muted); font: normal 10px/1.6 var(--sans); }
.metric-strip strong { display: block; margin: 7px 0 5px; color: var(--wine-soft); font-size: 25px; font-weight: 700; }
.metric-strip small { color: var(--muted); font-size: 14px; }

.dossier-list, .summary-list { margin: 0; }
.dossier-list div, .summary-list div { display: flex; justify-content: space-between; gap: 12px; padding: 7px 0; border-bottom: 1px solid var(--line); }
.dossier-list dt, .summary-list dt { color: var(--muted); font: 10px var(--sans); }
.dossier-list dd, .summary-list dd { min-width: 0; margin: 0; overflow-wrap: anywhere; text-align: right; font-size: 12px; }
.compact-list, .task-list { display: grid; }
.compact-list button, .task-list button { padding: 11px 0; border: 0; border-bottom: 1px solid var(--line); text-align: left; color: var(--ink); background: transparent; cursor: pointer; }
.compact-list button:last-child, .task-list button:last-child { border-bottom: 0; }
.compact-list strong, .compact-list span, .task-list strong, .task-list span { display: block; }
.compact-list strong, .task-list strong { margin-bottom: 4px; font-size: 12px; }
.compact-list span, .task-list span { color: var(--muted); font: 10px/1.55 var(--sans); }
.task-list b { float: right; display: inline-grid; min-width: 18px; height: 18px; place-items: center; border-radius: 50%; color: #fff; background: var(--danger); font: 9px var(--sans); }
.quick-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.quick-grid button { min-height: 54px; padding: 7px; border: 1px solid var(--line); color: var(--wine); background: var(--surface-soft); cursor: pointer; font: 10px/1.4 var(--sans); }

.notice { margin-bottom: 17px; padding: 12px 14px; border-left: 3px solid var(--gold); color: #6a512d; background: #fbf5e6; font: 11px/1.8 var(--sans); }
.btn { padding: 9px 13px; border: 1px solid transparent; color: #fff; background: var(--indigo); cursor: pointer; font: 700 11px var(--sans); }
.btn:hover { filter: brightness(1.08); }
.btn-primary { background: var(--wine-soft); }
.btn-secondary { color: var(--ink); border-color: var(--line-strong); background: var(--surface); }
.btn-danger { background: var(--danger); }
.btn-block { width: 100%; }
.btn-small { padding: 6px 9px; font-size: 10px; }

.field { display: grid; min-width: 0; gap: 7px; margin-bottom: 16px; }
.field label { color: var(--indigo); font: 700 11px var(--sans); }
.field input, .field select, .field textarea, .filters input, .filters select, .section-toolbar select { width: 100%; padding: 10px 11px; border: 1px solid var(--line); color: var(--ink); background: var(--surface); outline: none; font: 11px var(--sans); }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--wine-soft); box-shadow: 0 0 0 3px rgba(113,44,46,.1); }
.field textarea { min-height: 100px; resize: vertical; }
.filters { flex-wrap: wrap; margin-bottom: 15px; }
.filters input, .filters select { width: auto; min-width: 150px; }
.section-toolbar { justify-content: space-between; margin-bottom: 12px; }
.section-toolbar label { display: flex; align-items: center; gap: 7px; color: var(--muted); font: 11px var(--sans); }

.progress-line { display: grid; gap: 6px; margin: 13px 0; }
.progress-meta { display: flex; justify-content: space-between; gap: 10px; font: 10px var(--sans); }
.progress { height: 5px; overflow: hidden; background: #e9e3d9; }
.progress span { display: block; height: 100%; background: var(--orange); }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--surface); }
table { width: 100%; min-width: 700px; border-collapse: collapse; }
th, td { padding: 11px 12px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { color: var(--indigo); background: var(--surface-soft); font: 700 10px var(--sans); }
td { font-size: 12px; font-weight: 500; }
tbody tr { cursor: pointer; }
tbody tr:hover { background: #fbf7f0; }
.badge { display: inline-flex; padding: 3px 7px; border: 1px solid currentColor; border-radius: 20px; color: var(--green); font: 9px var(--sans); }
.badge-warn { color: var(--orange); }
.badge-danger { color: var(--danger); }
.badge-info { color: var(--indigo); }

.timeline { display: grid; }
.timeline-item { padding: 0 0 18px 16px; border-left: 1px solid var(--line); }
.timeline-item:last-child { border-left-color: transparent; }
.timeline-item strong, .timeline-item span { display: block; }
.timeline-item strong { margin-bottom: 4px; font-size: 12px; }
.timeline-item span { color: var(--muted); font: 10px var(--sans); }
.tabs { margin-bottom: 17px; border-bottom: 1px solid var(--line); overflow-x: auto; }
.tab { padding: 10px 12px; border: 0; border-bottom: 2px solid transparent; color: var(--muted); background: transparent; cursor: pointer; }
.tab.active { color: var(--wine); border-color: var(--wine); }
.form-grid { display: grid; min-width: 0; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2px 17px; }
.form-grid .full { grid-column: 1 / -1; }
.form-actions { display: flex; justify-content: flex-end; gap: 9px; padding-top: 17px; border-top: 1px solid var(--line); }
.flow { display: flex; align-items: center; gap: 8px; overflow-x: auto; padding: 17px; border: 1px solid var(--line); background: var(--surface); }
.flow-step { min-width: 130px; padding: 12px; text-align: center; border: 1px solid var(--line); background: var(--surface-soft); }
.flow-arrow { color: var(--gold); }
.page-index { columns: 3 250px; column-gap: 15px; }
.index-group { break-inside: avoid; margin-bottom: 15px; padding: 15px; border: 1px solid var(--line); background: var(--surface); }
.index-group h3 { margin: 0 0 9px; color: var(--wine); }
.index-link { display: block; width: 100%; padding: 7px 0; border: 0; border-bottom: 1px solid var(--line); text-align: left; color: var(--indigo); background: transparent; cursor: pointer; }
.modal-backdrop { position: fixed; z-index: 40; inset: 0; display: grid; place-items: center; padding: 20px; background: rgba(32,20,19,.62); }
.modal { width: min(520px, 100%); padding: 24px; border-top: 4px solid var(--wine-soft); background: var(--surface); box-shadow: var(--shadow); }
.modal h2 { margin-top: 0; }
.mobile-overlay { display: none; }
.practice-entry-card { margin-bottom: 15px; border-color: var(--line-strong); background: #fffdf7; }
.practice-entry-form .form-actions { margin-top: 4px; }
.profile-card { border-top: 3px solid var(--line-strong); }
.profile-head { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 18px; margin-bottom: 22px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.profile-avatar { width: 76px; height: 76px; display: grid; place-items: center; border-radius: 50%; color: var(--gold); background: #e6e0d5; font-size: 28px; }
.profile-summary h2 { display: flex; align-items: center; gap: 10px; margin: 0 0 7px; font-size: 22px; }
.profile-summary p { margin: 0; color: var(--muted); font-size: 12px; }
.profile-status-list { margin-top: 16px; border-top: 1px solid var(--line); }
.profile-status-list div { display: flex; gap: 18px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.profile-status-list dt { min-width: 74px; color: var(--muted); font-size: 12px; }
.profile-status-list dd { margin: 0; font-size: 12px; }
.preference-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px 42px; padding: 8px 0 18px; }
.preference-grid label { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.wide-input { flex: 1 1 520px; }
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 18px; }
.form-dialog-card { max-width: 980px; margin: 0 auto; border-top: 3px solid var(--wine-soft); box-shadow: var(--shadow); }
.student-number-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; }
.attendance-workspace { display: grid; gap: 15px; margin-top: 15px; }
.status-line { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; color: var(--muted); }
.task-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.task-grid div { padding: 14px 12px; border-right: 1px solid var(--line); }
.task-grid div:last-child { border-right: 0; }
.task-grid span { display: block; margin-bottom: 8px; color: var(--muted); font-size: 11px; font-weight: 600; }
.task-grid strong { font-size: 13px; }
.history-stat-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.history-stat-grid div { display: grid; place-items: center; min-height: 92px; background: var(--surface-soft); }
.history-stat-grid strong { color: var(--gold); font-size: 28px; }
.history-stat-grid span { color: var(--muted); font-size: 12px; font-weight: 600; }
.resource-layout { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 24px; align-items: start; }
.resource-major-list { display: grid; gap: 6px; }
.resource-major-list button { width: 100%; padding: 12px 14px; border: 1px solid transparent; text-align: left; color: var(--ink); background: transparent; cursor: pointer; }
.resource-major-list button.active, .resource-major-list button:hover { border-color: var(--line); background: var(--surface-soft); }
.resource-major-list strong, .resource-major-list span { display: block; }
.resource-major-list span { margin-top: 5px; color: var(--muted); font-size: 11px; }
.condition-group { display: grid; gap: 10px; padding: 12px; border: 1px solid var(--line); background: var(--surface-soft); }
.condition-group > div:first-child { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.condition-group span { color: var(--gold); font-size: 11px; font-weight: 700; }
.condition-separator { margin: 10px 0; text-align: center; color: var(--wine-soft); font-weight: 700; }
.condition-list { display: grid; gap: 8px; }
.condition-list div { display: flex; justify-content: space-between; gap: 12px; padding: 9px 10px; border: 1px solid var(--line); background: var(--surface); }
.condition-list b { font-size: 12px; }
.condition-list span { color: var(--muted); text-align: right; }
.rule-step-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 9px; }
.rule-step-grid div { min-height: 96px; padding: 13px; border: 1px solid var(--line); background: var(--surface-soft); }
.rule-step-grid strong, .rule-step-grid span { display: block; }
.rule-step-grid strong { margin-bottom: 7px; font-size: 13px; }
.rule-step-grid span { color: var(--muted); font-size: 11px; line-height: 1.6; }
.activity-section { margin-top: 18px; padding: 17px; border: 1px solid var(--line); background: var(--surface); }
.activity-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px; }
.activity-card { display: grid; gap: 10px; min-width: 0; padding: 17px; border: 1px solid var(--line); border-left: 3px solid var(--line-strong); background: var(--surface); box-shadow: 0 2px 10px rgba(47,32,23,.035); }
.activity-card-pending { border-left-color: var(--gold); }
.activity-card-returned { border-left-color: var(--danger); }
.activity-card-published { border-left-color: var(--indigo); }
.activity-card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.activity-card-head h2 { margin: 0; font-size: 18px; }
.activity-card .summary-list div { padding: 6px 0; }
.activity-card .action-row { flex-wrap: wrap; padding-top: 7px; border-top: 1px solid var(--line); }
.activity-admin-toolbar { margin-bottom: 15px; }

/* Windows 中文显示优先保证清晰度，避免小字号宋体笔画过细。 */
.eyebrow, .nav-label, .card-link, .metric-label, .metric-note,
.metric-strip span, .metric-strip em, .dossier-list dt, .summary-list dt,
.compact-list span, .task-list span, .muted, .table-note, .progress-meta,
.timeline-item span {
  font-size: 11px;
  font-weight: 600;
}
.notice, .field label, .field input, .field select, .field textarea,
.filters input, .filters select, .section-toolbar label, .section-toolbar select,
.topbar select, .global-search, .utility-button, .view-tabs, .btn {
  font-size: 12px;
  font-weight: 600;
}
.compact-list strong, .task-list strong, .dossier-list dd, .summary-list dd {
  font-size: 13px;
  font-weight: 600;
}
.badge { font-size: 10px; font-weight: 700; }
th { font-size: 11px; font-weight: 700; }
h1, h2, h3, strong { font-weight: 700; }

.notification-list, .forum-topic-list, .forum-replies { display: grid; border: 1px solid var(--line); background: var(--surface); }
.notification-list button, .forum-topic-list button {
  display: grid;
  grid-template-columns: 82px minmax(220px, 1.2fr) minmax(260px, 1.8fr) 110px;
  gap: 14px;
  align-items: center;
  padding: 16px;
  border: 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
}
.notification-list button:last-child, .forum-topic-list button:last-child { border-bottom: 0; }
.notification-list button:hover, .forum-topic-list button:hover { background: var(--surface-soft); }
.notification-list em, .forum-topic-list em, .notification-list time, .forum-topic-list time, .forum-author span, .forum-author time, .forum-replies time {
  color: var(--muted);
  font: normal 600 11px/1.6 var(--sans);
}
.notification-list time, .forum-topic-list time { text-align: right; }
.forum-post-card { display: grid; grid-template-columns: 190px minmax(0, 1fr); border: 1px solid var(--line); background: var(--surface); }
.forum-author { display: grid; align-content: start; gap: 6px; padding: 20px; border-right: 1px solid var(--line); background: var(--surface-soft); }
.forum-post-card article { padding: 22px 26px; }
.forum-post-card article h2 { margin-top: 0; }
.forum-post-card article p, .forum-replies p { line-height: 1.9; }
.forum-replies { margin-top: 15px; padding: 0 20px; }
.forum-replies h2 { margin-bottom: 0; }
.forum-replies > div { padding: 18px 0; border-bottom: 1px solid var(--line); }
.forum-replies > div:last-child { border-bottom: 0; }
.forum-replies time { float: right; }

@media (max-width: 1380px) {
  .research-grid { grid-template-columns: 240px minmax(500px, 1fr); }
  .action-panel { grid-column: 1 / -1; grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1120px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .research-grid { grid-template-columns: 1fr; }
  .dossier-panel, .action-panel { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric-strip { grid-template-columns: repeat(2, 1fr); gap: 14px 0; }
  .metric-strip > div:nth-child(2) { border-right: 0; }
}

@media (max-width: 820px) {
  .login-shell { grid-template-columns: 1fr; }
  .login-hero { min-height: 42vh; padding: 34px 23px; }
  .news-list { display: none; }
  .login-panel { padding: 34px 22px; }
  .app-layout { display: block; }
  .app-main { display: block; }
  .app-sidebar { transform: translateX(-100%); transition: transform .2s ease; }
  .app-sidebar.open { transform: translateX(0); }
  .mobile-overlay.open { display: block; position: fixed; z-index: 9; inset: 0; background: rgba(0,0,0,.35); }
  .menu-button { display: inline-flex; }
  .topbar { gap: 8px; padding: 9px 12px; }
  .topbar-left > div, .global-search, .utility-button { display: none; }
  .topbar-actions { min-width: 0; }
  .topbar-actions select { width: min(155px, 50vw); max-width: 100%; }
  .avatar { display: none; }
  .page { padding: 18px 12px 34px; }
  .page-header { align-items: flex-start; flex-direction: column; }
  .card-title { align-items: flex-start; flex-direction: column; }
  .view-tabs { overflow-x: auto; align-items: stretch; }
  .view-tabs span { display: none; }
  .view-tabs button { white-space: nowrap; }
  .grid-2, .grid-3, .grid-4, .form-grid, .dossier-panel, .action-panel, .resource-layout, .rule-step-grid, .activity-grid { grid-template-columns: 1fr; }
  .student-number-row { grid-template-columns: 1fr; }
  .research-core { order: -1; }
  .form-grid .full { grid-column: auto; }
  .metric-strip { grid-template-columns: 1fr 1fr; }
  .metric-strip > div { padding: 4px 10px; }
  .quick-grid { grid-template-columns: repeat(2, 1fr); }
  .section-toolbar { align-items: stretch; flex-direction: column; }
  .notification-list button, .forum-topic-list button { grid-template-columns: 1fr; gap: 6px; }
  .notification-list time, .forum-topic-list time { text-align: left; }
  .forum-post-card { grid-template-columns: 1fr; }
  .forum-author { border-right: 0; border-bottom: 1px solid var(--line); }
  .status-line { align-items: flex-start; flex-direction: column; }
  .task-grid { grid-template-columns: 1fr; }
  .task-grid div { border-right: 0; border-bottom: 1px solid var(--line); }
  .task-grid div:last-child { border-bottom: 0; }
}