.mobile-menu-btn{
  display:none;
  width:42px;
  height:42px;
  border:none;
  border-radius:12px;
  background:var(--surface2);
  color:var(--text);
  font-size:22px;
  cursor:pointer;
  transition:0.2s;
  align-items:center;
  justify-content:center;
}
.mobile-menu-btn:hover{
  background:var(--accent-light);
  color:var(--accent);
}
.planner-layout{
  display:flex;
  flex-direction:column;
  gap:24px;
}
.planner-hero{
  background:linear-gradient(135deg,#0f172a,#1a4fd6);
  border-radius:var(--radius);
  padding:36px;color:white;
  position:relative;
  overflow:hidden;
}
.planner-hero::before{content:'';
  position:absolute;
  width:240px;
  height:240px;
  border-radius:50%;
  background:rgba(255,255,255,0.04);
  top:-80px;
  right:-60px;
}
.planner-hero::after{content:'';
  position:absolute;
  width:160px;
  height:160px;
  border-radius:50%;
  background:rgba(255,255,255,0.06);
  bottom:-50px;
  right:140px;
}
.planner-eyebrow{font-size:10px;
  text-transform:uppercase;
  letter-spacing:.14em;
  margin-bottom:10px;
  color:rgba(255,255,255,.65);
  font-weight:700;
}
.planner-title{font-size:34px;
  line-height:1.1;
  margin-bottom:10px;
  font-family:var(--font-serif);
}
.planner-sub{
  max-width:600px;
  line-height:1.7;
  color:rgba(255,255,255,.78);
  font-size:14px;
  position:relative;
  z-index:1;
}
.planner-grid{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:24px;
}
.planner-bottom-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.calendar-panel,
.events-panel,
.tasks-panel,
.mindmap-panel{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:22px;
}
.planner-section-title{
  font-size:14px;
  font-weight:700;
  margin-bottom:18px;
  color:var(--text);
}
.planner-calendar-header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:18px;
}
.planner-calendar-month{
  font-size:18px;
  font-family:var(--font-serif);
  font-weight:700;
}
.planner-cal-actions{
  display:flex;
  gap:8px;
}
.planner-cal-nav{
  width:34px;
  height:34px;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  background:var(--surface2);
  cursor:pointer;
  font-size:16px;
  font-weight:700;
  color:var(--muted);
  transition:background .15s;
}
.planner-cal-nav:hover{
  background:var(--accent-light);
  color:var(--accent);
}
.planner-weekdays{
  display:grid;
  grid-template-columns:repeat(7,1fr);
  gap:6px;
  margin-bottom:8px;
}
.planner-weekday{
  text-align:center;
  font-size:10px;
  font-weight:700;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--muted);
}
.planner-cal-grid{
  display:grid;
  grid-template-columns:repeat(7,1fr);
  gap:6px;
}
.planner-cal-day{
  background:var(--surface2);
  border:1px solid var(--border);
  border-radius:10px;
  min-height:64px;
  padding:8px;
  display:flex;
  flex-direction:column;
  cursor:pointer;
  transition:.15s;
}
.planner-cal-day:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow);
}
.planner-cal-date{
  font-size:12px;
  font-weight:800;
}
.planner-cal-event{
  font-size:9px;
  padding:3px 6px;
  border-radius:999px;
  background:var(--accent-light);
  color:var(--accent);
  font-weight:700;
  margin-top:4px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.planner-cal-day.p-today{
  background:linear-gradient(135deg,var(--accent),var(--accent-mid));
  color:white;
}
.planner-cal-day.p-today .planner-cal-event{
  background:rgba(255,255,255,.2);
  color:white;
}
.planner-cal-empty{
  min-height:64px;
}
.event-form{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-bottom:18px;
}
.event-input{
  border:1px solid var(--border);
  outline:none;
  background:var(--surface2);
  padding:10px 12px;
  border-radius:var(--radius-sm);
  font-family:var(--font);
  font-size:13px;
  color:var(--text);
  transition:border-color .15s;
}
.event-input:focus{
  border-color:var(--accent-mid);
}
.planner-add-btn{
  border:none;
  background:var(--accent);
  color:white;
  padding:10px 14px;
  border-radius:var(--radius-sm);
  cursor:pointer;
  font-weight:700;
  font-size:13px;
  font-family:var(--font);
  transition:background .15s;
}
.planner-add-btn:hover{
  background:var(--accent-hover);
}
.today-events-list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.p-event-card{
  background:var(--surface2);
  padding:12px 14px;
  border-radius:var(--radius-sm);
  border:1px solid var(--border);
}
.p-event-top{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:8px;
}
.p-event-name{
  font-weight:700;
  font-size:13px;
}
.p-event-date{
  font-size:11px;
  color:var(--muted);
}
.p-event-actions{
  display:flex;
  gap:8px;
}
.p-event-btn{
  border:none;
  padding:5px 10px;
  border-radius:var(--radius-xs);
  cursor:pointer;
  font-weight:700;
  font-size:11px;
  font-family:var(--font);
}
.p-edit-btn{
  background:var(--accent-light);
  color:var(--accent);
}
.p-delete-btn{
  background:var(--red-light);
  color:var(--red);
}
.task-input-row{
  display:flex;
  gap:10px;
  margin-bottom:14px;
}
.planner-task-input{
  flex:1;
  border:1px solid var(--border);
  outline:none;
  background:var(--surface2);
  border-radius:var(--radius-sm);
  padding:10px 12px;
  font-family:var(--font);
  font-size:13px;
  color:var(--text);
  transition:border-color .15s;
}
.planner-task-input:focus{
  border-color:var(--accent-mid);
}
.p-task-list{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.p-task-card{
  background:var(--surface2);
  border-radius:var(--radius-sm);
  padding:12px 14px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  border:1px solid var(--border);
}
.p-task-left{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
}
.p-task-delete{
  border:none;
  background:var(--red-light);
  color:var(--red);
  padding:5px 10px;
  border-radius:var(--radius-xs);
  cursor:pointer;
  font-size:11px;
  font-weight:700;
}
.p-completed{
  text-decoration:line-through;
  opacity:.5;
}
.mindmap-sub{
  margin-bottom:14px;
  color:var(--muted);
  font-size:13px;
}
.mindmap-toolbar{
  display:flex;
  gap:10px;
  margin-bottom:18px;
}
.mindmap-input{
  flex:1;
  border:1px solid var(--border);
  outline:none;
  background:var(--surface2);
  border-radius:var(--radius-sm);
  padding:10px 12px;
  font-family:var(--font);
  font-size:13px;
  color:var(--text);
}
.mindmap-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:12px;
}
.mind-node{
  background:var(--surface2);
  border-radius:16px;
  padding:20px;
  text-align:center;
  font-weight:700;
  font-size:13px;
  position:relative;
  transition:transform .15s;
  border:1px solid var(--border);
}
.mind-node:hover{
  transform:scale(1.03);
}
.mind-core{
  background:var(--accent);
  color:white;
  border-color:var(--accent);
}
.node-delete{
  position:absolute;
  top:-8px;
  right:-8px;
  width:22px;
  height:22px;
  border-radius:50%;
  background:var(--red);
  display:flex;
  align-items:center;
  justify-content:center;
  color:white;
  font-size:10px;
  font-weight:800;
  cursor:pointer;
  border:none;
}
.pagination{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 0 0;
  border-top:1px solid var(--border);
  margin-top:4px;
}
.pagination-info{
  font-size:12px;
  color:var(--muted);
}
.pagination-controls{
  display:flex;
  align-items:center;
  gap:4px;
}
.page-btn{
  width:30px;
  height:30px;
  border:1px solid var(--border);
  border-radius:var(--radius-xs);
  background:var(--surface2);
  cursor:pointer;
  font-size:12px;
  font-weight:600;
  color:var(--muted);
  transition:background .12s,color .12s;
  display:flex;
  align-items:center;
  justify-content:center;
}
.page-btn:hover{
  background:var(--accent-light);
  color:var(--accent);
}
.page-btn.active{
  background:var(--accent);
  color:white;
  border-color:var(--accent);
}
.page-btn:disabled{
  opacity:.4;
  cursor:not-allowed;
}
.questions-container{
  display:flex;
  flex-direction:column;
  gap:16px;
  margin-bottom:16px;
  max-height:300px;
  overflow-y:auto;
}
.question-block{
  background:var(--surface2);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:14px;
}
.question-block-header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:10px;
}
.question-block-title{
  font-size:11px;
  font-weight:700;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:.06em;
}
.question-remove-btn{
  width:22px;
  height:22px;
  border-radius:50%;
  border:1px solid var(--border);
  background:var(--surface);
  cursor:pointer;
  color:var(--red);
  font-size:13px;
  display:flex;
  align-items:center;
  justify-content:center;
}
.question-remove-btn:hover{
  background:var(--red-light);
}
.q-options-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:8px;
  margin-top:8px;
}
.add-question-btn{
  border:1px dashed var(--accent-mid);
  background:var(--accent-light);
  color:var(--accent);
  padding:9px 14px;
  border-radius:var(--radius-sm);
  font-size:12px;
  font-weight:700;
  cursor:pointer;
  width:100%;
  margin-bottom:16px;
  transition:background .15s;
}
.add-question-btn:hover{
  background:var(--surface3);
}
.dynamic-quiz-item,.dynamic-assign-item,.dynamic-announce-item{animation:slideIn .25s ease;}
@keyframes slideIn{
  from{opacity:0;transform:translateY(-6px);}
  to{opacity:1;transform:translateY(0);}
}
#announcements-list .feed-item{position:relative;}
.announce-tag-select{
  border:1px solid var(--border);
  border-radius:var(--radius-xs);
  padding:4px 8px;
  font-size:11px;
  background:var(--surface2);
  font-family:var(--font);
}

/* Course detail & resource styles */
.course-detail-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.2s ease;
  margin-bottom: 20px;
}
.course-detail-header {
  padding: 20px 24px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background 0.15s;
}
.course-detail-header:hover {
  background: var(--surface3);
}
.course-detail-title {
  display: flex;
  align-items: center;
  gap: 16px;
}
.course-detail-title h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
}
.course-detail-toggle {
  font-size: 20px;
  color: var(--muted);
  transition: transform 0.2s;
}
.course-detail-body {
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}
.course-detail-card.open .course-detail-body {
  max-height: 2000px;
  transition: max-height 0.5s ease-in;
}
.course-detail-card.open .course-detail-toggle {
  transform: rotate(180deg);
}
.course-tabs {
  display: flex;
  gap: 8px;
  padding: 16px 24px 0 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.course-tab-btn {
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 600;
  background: none;
  border: none;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}
.course-tab-btn.active {
  color: var(--accent);
  background: var(--surface);
  border-bottom: 2px solid var(--accent);
  margin-bottom: -1px;
}
.course-tab-content {
  display: none;
  padding: 24px;
}
.course-tab-content.active {
  display: block;
}
.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 16px;
}
.resource-item {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.15s;
}
.resource-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.resource-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--accent);
}
.resource-info {
  flex: 1;
  min-width: 0;
}
.resource-name {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.resource-meta {
  font-size: 11px;
  color: var(--muted);
}
.resource-actions {
  display: flex;
  gap: 8px;
}
.resource-download, .resource-delete {
  padding: 6px 12px;
  border-radius: var(--radius-xs);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  border: none;
}
.resource-download {
  background: var(--accent-light);
  color: var(--accent);
}
.resource-delete {
  background: var(--red-light);
  color: var(--red);
}
.upload-area {
  background: var(--surface2);
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  margin-bottom: 20px;
  cursor: pointer;
  transition: all 0.15s;
}
.upload-area:hover {
  border-color: var(--accent);
  background: var(--surface3);
}
.upload-area input {
  display: none;
}
.syllabus-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 12px;
}
.syllabus-week {
  font-weight: 700;
  color: var(--accent);
  min-width: 60px;
}
.syllabus-desc {
  flex: 1;
  color: var(--text);
}
.info-row {
  display: flex;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.info-label {
  width: 140px;
  font-weight: 700;
  color: var(--muted);
}
.info-value {
  flex: 1;
  color: var(--text);
}
.badge-grade {
  background: var(--green-light);
  color: var(--green);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

:root {
  --bg:            #e8f0fe;
  --surface:       #ffffff;
  --surface2:      #f0f4ff;
  --surface3:      #dce7fd;
  --text:          #0d1b3e;
  --muted:         #5a6a8a;
  --subtle:        #99aac9;
  --accent:        #1a4fd6;
  --accent-mid:    #3b6ef0;
  --accent-light:  #dce7fd;
  --accent-hover:  #1240b8;
  --green:         #146b45;
  --green-light:   #d6f5e7;
  --amber:         #a05a08;
  --amber-light:   #fef3dc;
  --red:           #b52424;
  --red-light:     #fde8e8;
  --border:        rgba(26,60,140,0.10);
  --border-strong: rgba(26,60,140,0.20);
  --radius:        14px;
  --radius-sm:     8px;
  --radius-xs:     6px;
  --shadow:        0 1px 4px rgba(26,60,140,0.08), 0 4px 16px rgba(26,60,140,0.06);
  --shadow-lg:     0 2px 10px rgba(26,60,140,0.10), 0 16px 40px rgba(26,60,140,0.08);
  --font:          -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-serif:    "Georgia","Times New Roman",serif;
}
*,
*::before,
*::after{
  margin:0;
  padding:0;
  box-sizing:border-box;
}
html{
  font-size:15px;
}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  min-height:100vh;
  display:flex;
}
.sidebar{
  width:220px;
  min-height:100vh;
  background:var(--surface);
  border-right:1px solid var(--border);
  display:flex;
  flex-direction:column;
  position:sticky;
  top:0;
  height:100vh;
  flex-shrink:0;
}
.sidebar-logo{
  padding:26px 24px 18px;
  border-bottom:1px solid var(--border);
}
.logo-name{
  font-family:var(--font-serif);
  font-size:22px;
  font-weight:bold;
  color:var(--accent);
  letter-spacing:-0.5px;
}
.logo-sub{
  font-size:11px;
  color:var(--muted);
  letter-spacing:0.08em;
  text-transform:uppercase;
  margin-top:2px;
}
.sidebar-nav{
  padding:16px 12px;
  flex:1;
  overflow-y:auto;
}
.nav-label{
  font-size:10px;
  text-transform:uppercase;
  letter-spacing:0.12em;
  color:var(--subtle);
  padding:0 12px;
  margin:18px 0 6px;
  font-weight:600;
}
.nav-label:first-child{
  margin-top:0;
}
.nav-item{
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 12px;
  border-radius:var(--radius-sm);
  cursor:pointer;
  font-size:14px;
  color:var(--muted);
  transition:background 0.15s,color 0.15s;
  user-select:none;
}
.nav-item:hover{
  background:var(--surface2);
  color:var(--text);
}
.nav-item.active{
  background:var(--accent-light);
  color:var(--accent);
  font-weight:600;
}
.nav-icon{
  font-size:15px;
  width:20px;
  text-align:center;
  flex-shrink:0;
}
.nav-badge{
  margin-left:auto;
  background:var(--accent);
  color:white;
  font-size:10px;
  font-weight:700;
  padding:2px 6px;
  border-radius:10px;
}
.sidebar-user{
  padding:14px 18px;
  border-top:1px solid var(--border);
  display:flex;
  align-items:center;
  gap:10px;
  cursor:pointer;
}
.user-avatar{
  width:34px;
  height:34px;
  border-radius:50%;
  background:var(--accent-light);
  color:var(--accent);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:12px;
  font-weight:700;
  flex-shrink:0;
  border:2px solid var(--accent);
}
.user-name{
  font-size:13px;
  font-weight:600;
}
.user-role{
  font-size:11px;
  color:var(--muted);
}
.main{
  flex:1;
  min-width:0;
  display:flex;
  flex-direction:column;
}
.topbar{
  padding:18px 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  background:var(--surface);
  border-bottom:1px solid var(--border);
  position:sticky;
  top:0;
  z-index:50;
}
.topbar-greeting{
  font-size:16px;
  font-weight:600;
}
.topbar-date{
  font-size:13px;
  color:var(--muted);
  margin-top:1px;
}
.topbar-right{
  display:flex;
  align-items:center;
  gap:10px;
}
.icon-btn{
  width:36px;
  height:36px;
  border-radius:var(--radius-sm);
  border:1px solid var(--border);
  background:var(--surface);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  color:var(--muted);
  font-size:15px;
  transition:background 0.15s,color 0.15s;
  position:relative;
}
.icon-btn:hover{
  background:var(--surface2);
  color:var(--text);
}
.notif-dot::after{
  content:'';
  position:absolute;
  top:7px;
  right:7px;
  width:6px;
  height:6px;
  background:var(--red);
  border-radius:50%;
  border:1.5px solid var(--surface);
}
.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  background:var(--surface2);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:7px 14px;
  min-width:210px;
  font-size:13px;
  color:var(--muted);
  cursor:text;
  font-family:var(--font);
  transition:border-color 0.15s;
}
.search-box:hover{
  border-color:var(--border-strong);
}
.teacher-badge{
  font-size:11px;
  font-weight:700;
  background:linear-gradient(135deg,#1a4fd6,#3b6ef0);
  color:white;
  padding:3px 10px;
  border-radius:10px;
  letter-spacing:0.04em;
}
.view{
  display:none;
}
.view.active{
  display:block;
}
.content{
  padding:28px 32px;
  display:grid;
  gap:20px;
}
.card{
  background:var(--surface);
  border-radius:var(--radius);
  border:1px solid var(--border);
  overflow:hidden;
}
.card-pad{
  padding:20px 22px;
}
.card-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:16px;
}
.card-title{
  font-size:11px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:0.10em;
  color:var(--muted);
}
.card-action{
  font-size:12px;
  color:var(--accent);
  cursor:pointer;
  font-weight:600;
}
.card-action:hover{
  text-decoration:underline;
}
.top-row{
  display:grid;
  grid-template-columns:1fr auto auto auto auto;
  gap:16px;
  align-items:stretch;
}
.stat-card{
  min-width:110px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  text-align:center;
}
.stat-val{
  font-family:var(--font-serif);
  font-size:38px;
  font-weight:bold;
  line-height:1;
  color:var(--text);
}
.stat-label{
  font-size:12px;
  color:var(--muted);
  margin-top:6px;
  font-weight:500;
  text-transform:uppercase;
  letter-spacing:0.06em;
}
.stat-trend{
  display:inline-flex;
  align-items:center;
  gap:3px;
  font-size:11px;
  font-weight:600;
  margin-top:8px;
  padding:2px 7px;
  border-radius:var(--radius-xs);
}
.trend-up{
  background:var(--green-light);
  color:var(--green);
}
.trend-warn{
  background:var(--amber-light);
  color:var(--amber);
}
.trend-red{
  background:var(--red-light);
  color:var(--red);
}
.hero{
  background:linear-gradient(125deg,#0d2a80 0%,#1a4fd6 55%,#3b6ef0 100%);
  border-radius:var(--radius);
  padding:28px 30px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  border:none;
  position:relative;
  overflow:hidden;
}
.hero-orb1{
  position:absolute;
  width:200px;
  height:200px;
  border-radius:50%;
  background:rgba(255,255,255,0.05);
  top:-60px;
  right:-40px;
  pointer-events:none;
}
.hero-orb2{
  position:absolute;
  width:140px;
  height:140px;
  border-radius:50%;
  background:rgba(255,255,255,0.07);
  bottom:-40px;
  right:120px;
  pointer-events:none;
}
.hero-text{
  position:relative;
  z-index:1;
}
.hero-eyebrow{
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:0.12em;
  color:rgba(255,255,255,0.65);
  font-weight:600;
  margin-bottom:8px;
}
.hero-title{
  font-family:var(--font-serif);
  font-size:26px;
  font-weight:bold;
  color:white;
  line-height:1.2;
  margin-bottom:8px;
}
.hero-title em{
  font-style:italic;
  color:rgba(255,255,255,0.8);
}
.hero-sub{
  font-size:13px;
  color:rgba(255,255,255,0.65);
}
.hero-cta{
  position:relative;
  z-index:1;
  background:white;
  color:var(--accent);
  border:none;
  padding:10px 22px;
  border-radius:var(--radius-sm);
  font-weight:700;
  font-size:13px;
  cursor:pointer;
  font-family:var(--font);
  transition:opacity 0.15s,transform 0.1s;
  flex-shrink:0;
}
.hero-cta:hover{
  opacity:0.92;
}
.hero-cta:active{
  transform:scale(0.97);
}
.grid-2-1{
  display:grid;
  grid-template-columns:1fr 330px;
  gap:20px;
  align-items:start;
}
.grid-2{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
}
.grid-3{
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:20px;
}
.courses-scroll{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(180px,1fr));
  gap:14px;
}
.course-card{
  background:var(--surface2);
  border-radius:var(--radius-sm);
  padding:16px;
  border:1px solid var(--border);
  transition:box-shadow 0.15s,transform 0.15s;
  cursor:pointer;
}
.course-card:hover{
  box-shadow:var(--shadow);
  transform:translateY(-1px);
}
.course-icon{
  font-size:26px;
  margin-bottom:10px;
  width:44px;
  height:44px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:var(--radius-sm);
}
.course-name{
  font-size:13px;
  font-weight:700;
  margin-bottom:4px;
  color:var(--text);
}
.course-meta{
  font-size:11px;
  color:var(--muted);
  margin-bottom:8px;
}
.course-students{
  font-size:12px;
  font-weight:600;
  color:var(--accent);
}
.progress-bar{
  height:4px;
  background:var(--border);
  border-radius:2px;
  overflow:hidden;
  margin-bottom:4px;
}
.progress-fill{
  height:100%;
  background:var(--accent);
  border-radius:2px;
}
.progress-pct{
  font-size:11px;
  color:var(--accent);
  font-weight:600;
}
.data-table{
  width:100%;
  border-collapse:collapse;
  font-size:13px;
}
.data-table th{
  font-size:10px;
  text-transform:uppercase;
  letter-spacing:0.10em;
  color:var(--muted);
  font-weight:700;
  padding:8px 12px;
  border-bottom:1px solid var(--border);
  text-align:left;
}
.data-table td{
  padding:11px 12px;
  border-bottom:1px solid var(--border);
  vertical-align:middle;
}
.data-table tr:last-child td{
  border-bottom:none;
}
.data-table tr:hover td{
  background:var(--surface2);
}
.badge{
  display:inline-flex;
  align-items:center;
  padding:3px 8px;
  border-radius:var(--radius-xs);
  font-size:10px;
  font-weight:700;
}
.badge-green{
  background:var(--green-light);
  color:var(--green);
}
.badge-amber{
  background:var(--amber-light);
  color:var(--amber);
}
.badge-red{
  background:var(--red-light);
  color:var(--red);
}
.badge-blue{
  background:var(--accent-light);
  color:var(--accent);
}
.quiz-list{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.quiz-item{
  background:var(--surface2);
  border-radius:var(--radius-sm);
  padding:16px 18px;
  border:1px solid var(--border);
  display:flex;
  align-items:center;
  gap:14px;
}
.quiz-icon{
  width:40px;
  height:40px;
  border-radius:var(--radius-sm);
  background:var(--accent-light);
  color:var(--accent);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:18px;
  flex-shrink:0;
}
.quiz-body{
  flex:1;
  min-width:0;
}
.quiz-name{
  font-size:13px;
  font-weight:700;
  margin-bottom:3px;
}
.quiz-meta{
  font-size:11px;
  color:var(--muted);
}
.quiz-stats{
  text-align:right;
  flex-shrink:0;
}
.quiz-score{
  font-family:var(--font-serif);
  font-size:22px;
  font-weight:bold;
  color:var(--accent);
  line-height:1;
}
.quiz-score-label{
  font-size:10px;
  color:var(--muted);
  margin-top:2px;
}
.grade-row{
  display:flex;
  align-items:center;
  padding:9px 0;
  border-bottom:1px solid var(--border);
  gap:10px;
}
.grade-row:last-child{
  border-bottom:none;
}
.grade-subject{
  font-size:13px;
  font-weight:500;
  flex:1;
}
.grade-bar-wrap{
  flex:1;
  max-width:120px;
  height:4px;
  background:var(--border);
  border-radius:2px;
  overflow:hidden;
}
.grade-bar{
  height:100%;
  border-radius:2px;
}
.grade-score{
  font-size:13px;
  font-weight:700;
  min-width:36px;
  text-align:right;
}
.btn-primary{
  background:var(--accent);
  color:white;
  border:none;
  padding:8px 16px;
  border-radius:var(--radius-sm);
  font-size:12px;
  font-weight:700;
  font-family:var(--font);
  cursor:pointer;
  transition:background 0.15s,transform 0.1s;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.btn-primary:hover{
  background:var(--accent-hover);
}
.btn-primary:active{
  transform:scale(0.97);
}
.btn-ghost{
  background:none;
  color:var(--muted);
  border:1px solid var(--border);
  padding:8px 14px;
  border-radius:var(--radius-sm);
  font-size:12px;
  font-weight:500;
  font-family:var(--font);
  cursor:pointer;
  transition:background 0.15s,color 0.15s;
}
.btn-ghost:hover{
  background:var(--surface2);
  color:var(--text);
}
.feed-item{
  display:flex;
  gap:12px;
  padding:12px 0;
  border-bottom:1px solid var(--border);
  cursor:pointer;
  transition:opacity 0.15s;
}
.feed-item:hover{
  opacity:0.75;
}
.feed-item:last-child{
  border-bottom:none;
  padding-bottom:0;
}
.feed-icon-wrap{
  width:36px;
  height:36px;
  border-radius:var(--radius-sm);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:17px;
  flex-shrink:0;
}
.feed-title{
  font-size:13px;
  font-weight:600;
  margin-bottom:2px;
}
.feed-meta{
  font-size:11px;
  color:var(--muted);
}
.feed-badge{
  font-size:10px;
  font-weight:700;
  padding:2px 7px;
  border-radius:var(--radius-xs);
  margin-left:auto;
  align-self:flex-start;
  flex-shrink:0;
  white-space:nowrap;
}
.mini-cal-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:14px;
}
.cal-month{
  font-size:14px;
  font-weight:700;
}
.cal-nav{
  display:flex;
  gap:4px;
}
.cal-nav button{
  width:26px;
  height:26px;
  border:1px solid var(--border);
  border-radius:var(--radius-xs);
  background:none;
  cursor:pointer;
  color:var(--muted);
  font-size:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:background 0.12s;
}
.cal-nav button:hover{
  background:var(--surface2);
}
.cal-grid{
  display:grid;
  grid-template-columns:repeat(7,1fr);
  gap:2px;
}
.cal-dow{
  text-align:center;
  font-size:9px;
  font-weight:700;
  text-transform:uppercase;
  color:var(--subtle);
  padding:4px 0;
  letter-spacing:0.06em;
}
.cal-day{
  text-align:center;
  font-size:12px;
  padding:5px 2px;
  border-radius:var(--radius-xs);
  cursor:pointer;
  color:var(--muted);
  transition:background 0.1s,color 0.1s;
}
.cal-day:hover{
  background:var(--surface2);
  color:var(--text);
}
.cal-day.today{
  background:var(--accent);
  color:white;
  font-weight:700;
}
.cal-day.has-event{
  color:var(--text);
  font-weight:600;
  position:relative;
}
.cal-day.has-event::after{
  content:'';
  position:absolute;
  bottom:2px;
  left:50%;
  transform:translateX(-50%);
  width:4px;
  height:4px;
  background:var(--accent-mid);
  border-radius:50%;
}
.cal-day.today.has-event::after{
  background:rgba(255,255,255,0.7);
}
.cal-day.other-month{
  opacity:0.3;
}
.upcoming-events{
  margin-top:14px;
  border-top:1px solid var(--border);
  padding-top:12px;
}
.event-row{
  display:flex;
  align-items:center;
  gap:8px;
  padding:5px 0;
}
.event-dot{
  width:6px;
  height:6px;
  border-radius:50%;
  flex-shrink:0;
}
.event-name{
  font-size:12px;
  font-weight:600;
  flex:1;
}
.event-date{
  font-size:11px;
  color:var(--muted);
}
.notes-area{
  width:100%;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:10px 12px;
  font-size:13px;
  font-family:var(--font);
  color:var(--text);
  background:var(--surface2);
  resize:none;
  height:88px;
  transition:border-color 0.15s,background 0.15s;
  margin-bottom:10px;
}
.notes-area:focus{
  outline:none;
  border-color:var(--accent-mid);
  background:var(--surface);
}
.btn-row{
  display:flex;
  gap:8px;
  align-items:center;
}
.note-saved{
  font-size:11px;
  color:var(--green);
  opacity:0;
  transition:opacity 0.3s;
  font-weight:600;
}
.right-stack{
  display:flex;
  flex-direction:column;
  gap:16px;
}
.tabs{
  display:flex;
  gap:3px;
  background:var(--surface2);
  border-radius:var(--radius-sm);
  padding:3px;
}
.tab{
  padding:5px 12px;
  border-radius:var(--radius-xs);
  font-size:12px;
  font-weight:500;
  cursor:pointer;
  color:var(--muted);
  transition:background 0.15s,color 0.15s;
}
.tab.active{
  background:var(--surface);
  color:var(--text);
  font-weight:700;
  box-shadow:0 1px 3px rgba(26,60,140,0.10);
}
.modal-overlay{
  display:none;
  position:fixed;
  inset:0;
  background:rgba(13,27,62,0.35);
  z-index:200;
  align-items:center;
  justify-content:center;
}
.modal-overlay.open{
  display:flex;
}
.modal{
  background:var(--surface);
  border-radius:var(--radius);
  padding:28px 30px;
  width:520px;
  max-width:95vw;
  max-height:90vh;
  overflow-y:auto;
  box-shadow:var(--shadow-lg);
}
.modal-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:20px;
}
.modal-title{
  font-size:17px;
  font-weight:700;
}
.modal-close{
  width:30px;
  height:30px;
  border-radius:50%;
  border:1px solid var(--border);
  background:none;
  cursor:pointer;
  color:var(--muted);
  font-size:16px;
  display:flex;
  align-items:center;
  justify-content:center;
}
.modal-close:hover{
  background:var(--surface2);
}
.form-group{
  margin-bottom:16px;
}
.form-label{
  font-size:12px;
  font-weight:700;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:0.06em;
  margin-bottom:6px;
  display:block;
}
.form-input{
  width:100%;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:9px 12px;
  font-size:13px;
  font-family:var(--font);
  color:var(--text);
  background:var(--surface2);
  transition:border-color 0.15s;
}
.form-input:focus{
  outline:none;
  border-color:var(--accent-mid);
}
.form-select{
  width:100%;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:9px 12px;
  font-size:13px;
  font-family:var(--font);
  color:var(--text);
  background:var(--surface2);
  cursor:pointer;
}
.modal-footer{
  display:flex;
  gap:10px;
  justify-content:flex-end;
  margin-top:22px;
  padding-top:16px;
  border-top:1px solid var(--border);
}
.page-header{
  margin-bottom:20px;
}
.page-title{
  font-size:22px;
  font-weight:700;
  color:var(--text);
  margin-bottom:4px;
}
.page-sub{
  font-size:13px;
  color:var(--muted);
}
.placeholder-view{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  padding:80px 32px;
  text-align:center;
  gap:12px;
}
.placeholder-icon{
  font-size:48px;
  margin-bottom:8px;
}
.placeholder-title{
  font-size:18px;
  font-weight:700;
  color:var(--text);
}
.placeholder-sub{
  font-size:13px;
  color:var(--muted);
  max-width:340px;
  line-height:1.6;
}
.placeholder-cta{
  margin-top:8px;
}
.sidebar-overlay{
  display:none;
  position:fixed;
  inset:0;
  background:rgba(13,27,62,0.45);
  z-index:998;
  backdrop-filter:blur(2px);
  -webkit-backdrop-filter:blur(2px);
}
.sidebar-overlay.show{display:block;}
/* Course detail & resource styles */
.courses-grid-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.course-detail-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.2s ease;
}

.course-detail-header {
  padding: 20px 24px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background 0.15s;
}

.course-detail-header:hover {
  background: var(--surface3);
}

.course-detail-title {
  display: flex;
  align-items: center;
  gap: 16px;
}

.course-detail-title h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
}

.course-detail-toggle {
  font-size: 20px;
  color: var(--muted);
  transition: transform 0.2s;
}

.course-detail-card.open .course-detail-toggle {
  transform: rotate(180deg);
}

.course-detail-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.course-detail-card.open .course-detail-body {
  max-height: 2000px;
  transition: max-height 0.5s ease-in;
}

.course-tabs {
  display: flex;
  gap: 8px;
  padding: 16px 24px 0 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.course-tab-btn {
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 600;
  background: none;
  border: none;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}

.course-tab-btn.active {
  color: var(--accent);
  background: var(--surface);
  border-bottom: 2px solid var(--accent);
  margin-bottom: -1px;
}

.course-tab-content {
  display: none;
  padding: 24px;
}

.course-tab-content.active {
  display: block;
}

/* Stats grid inside course details */
.course-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.course-stat-box {
  text-align: center;
  background: var(--surface2);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.course-stat-number {
  font-size: 28px;
  font-weight: bold;
  font-family: var(--font-serif);
}

.course-stat-label {
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
}

/* Progress bar inside course */
.course-progress {
  margin-top: 8px;
}

.course-progress .progress-bar {
  margin-top: 4px;
}

/* Resources */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.resource-item {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.15s;
}

.resource-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.resource-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--accent);
}

.resource-info {
  flex: 1;
  min-width: 0;
}

.resource-name {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.resource-meta {
  font-size: 11px;
  color: var(--muted);
}

.resource-actions {
  display: flex;
  gap: 8px;
}

.resource-download {
  background: var(--accent-light);
  color: var(--accent);
  padding: 6px 12px;
  border-radius: var(--radius-xs);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  border: none;
}

.resource-delete {
  background: var(--red-light);
  color: var(--red);
  padding: 6px 12px;
  border-radius: var(--radius-xs);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  border: none;
}

.upload-area {
  background: var(--surface2);
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  margin-bottom: 20px;
  cursor: pointer;
  transition: all 0.15s;
}

.upload-area:hover {
  border-color: var(--accent);
  background: var(--surface3);
}

.upload-area input {
  display: none;
}

/* Syllabus */
.syllabus-list {
  margin-top: 8px;
}

.syllabus-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 12px;
}

.syllabus-week {
  font-weight: 700;
  color: var(--accent);
  min-width: 60px;
}

.syllabus-desc {
  flex: 1;
  color: var(--text);
}

/* Info rows for course details */
.info-row {
  display: flex;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.info-label {
  width: 140px;
  font-weight: 700;
  color: var(--muted);
}

.info-value {
  flex: 1;
  color: var(--text);
}

.badge-grade {
  background: var(--green-light);
  color: var(--green);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  display: inline-block;
}
@media(max-width:1100px){
  .grid-2-1{grid-template-columns:1fr;}
  .right-stack{display:grid;grid-template-columns:1fr 1fr;}
  .top-row{grid-template-columns:1fr 1fr;}
}
@media(max-width:820px){
  .mobile-menu-btn{display:flex;}
  .sidebar{
    position:fixed;
    left:-260px;
    top:0;
    width:240px;
    height:100vh;
    z-index:999;
    transition:left 0.3s ease;
    box-shadow:var(--shadow-lg);
    display:flex;
  }
  .sidebar.show{left:0;}
  .content{
    padding:14px;
  }
  .topbar{
    padding:12px 16px;
    gap:10px;
  }
  .search-box{
    display:none;
  }
  .teacher-badge{
    display:none;
  }
  .topbar-greeting{
    font-size:14px;
  }
  .topbar-date{
    font-size:11px;
  }
  .grid-2,
  .grid-3,
  .grid-2-1{
    grid-template-columns:1fr;
  }
  .right-stack{
    display:flex;
    flex-direction:column;
    gap:16px;
  }
  .top-row{
    grid-template-columns:1fr 1fr;
    gap:10px;
  }
  .hero{
    flex-direction:column;
    align-items:flex-start;
    gap:14px;
    padding:20px 18px;
  }
  .hero-title{
    font-size:20px;
  }
  .hero-cta{
    width:100%;
  }
  .stat-card{
    min-width:unset;
  }
  .stat-val{
    font-size:28px;
  }
  .data-table-wrap{
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
  }
  .data-table{
    min-width:480px;
  }
  .courses-scroll{
    grid-template-columns:1fr 1fr;
  }
  .quiz-item{
    flex-wrap:wrap;
    gap:10px;
  }
  .quiz-stats{
    text-align:left;
  }
  .modal{
    width:100%!important;
    max-width:100%!important;
    border-radius:var(--radius) var(--radius) 0 0;
    padding:20px 18px;
    position:fixed;
    bottom:0;
    left:0;
    right:0;
    max-height:92vh;
  }
  .modal-overlay{
    align-items:flex-end;
  }
  .planner-grid,
  .planner-bottom-grid{
    grid-template-columns:1fr;
  }
  .planner-title{
    font-size:24px;
  }
  .planner-hero{
    padding:22px 18px;
  }
  .planner-cal-day{
    min-height:44px;
  }
  .feed-badge{
    display:none;
  }
  #view-grades .data-table,
  #view-assignments .data-table,
  #view-students .data-table{
    min-width:520px;
  }
  .topbar-right{
    gap:6px;
  }
  .icon-btn{
    width:32px;
    height:32px;
    font-size:14px;
  }
}
@media(max-width:480px){
  .top-row{
    grid-template-columns:1fr 1fr;
  }
  .courses-scroll{
    grid-template-columns:1fr;
  }
  .stat-val{
    font-size:24px;
  }
  .hero-title{
    font-size:18px;
  }
  .content{
    padding:10px;
  }
  .topbar{
    padding:10px 12px;
  }
}