:root {
  --bg-main: #0a0b10;
  --bg-panel: #11121d;
  --bg-card: #171826;
  --bg-input: #1d1e2f;
  
  --border-color: #24263c;
  --border-color-glow: rgba(99, 102, 241, 0.2);
  
  --text-primary: #f3f4f6;
  --text-secondary: #8c95a5;
  --text-disabled: #4b5563;
  
  --color-accent: #6366f1;
  --color-accent-hover: #4f46e5;
  --color-danger: #f43f5e;
  --color-danger-hover: #e11d48;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  
  --font-family-sans: 'Outfit', sans-serif;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.35);
}

/* Base resets & styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-family-sans);
  overflow: hidden;
  height: 100vh;
  -webkit-font-smoothing: antialiased;
}

@media print {
  body {
    display: none !important;
  }
}

.hidden {
  display: none !important;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}
::-webkit-scrollbar-track {
  background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent);
}

/* Security Shield screen */
#security-shield {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: #000;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 99999;
}

.shield-content {
  text-align: center;
  max-width: 450px;
  padding: 2.5rem;
  background: radial-gradient(circle, rgba(244, 63, 94, 0.08) 0%, rgba(0,0,0,0) 80%);
  border: 1px solid rgba(244, 63, 94, 0.15);
  border-radius: 1rem;
}

.shield-content h2 {
  color: var(--color-danger);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: 0.05rem;
}

.shield-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

/* Buttons & Inputs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-sans);
  font-weight: 500;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border-radius: 0.375rem;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  box-shadow: var(--shadow-sm);
  outline: none;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #fff;
}
.btn-primary:hover {
  background-color: var(--color-accent-hover);
}

.btn-secondary {
  background-color: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--border-color);
}

.btn-danger {
  background-color: var(--color-danger);
  color: #fff;
}
.btn-danger:hover {
  background-color: var(--color-danger-hover);
}

.btn-logout {
  background-color: transparent;
  color: var(--text-secondary);
  font-size: 0.8rem;
}
.btn-logout:hover {
  color: var(--color-danger);
}

.btn-full {
  width: 100%;
}

.btn:disabled,
button:disabled,
select:disabled,
input:disabled,
textarea:disabled {
  opacity: 0.45 !important;
  cursor: not-allowed !important;
  pointer-events: none !important;
}

.control-group.disabled-group {
  opacity: 0.5;
  pointer-events: none;
}

.radio-option:hover {
  background-color: rgba(255, 255, 255, 0.04);
}

.radio-option input[type="radio"] {
  width: 16px;
  height: 16px;
  margin: 0;
}

.input-field,
.select-field,
.textarea-field {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  color: var(--text-primary);
  font-family: var(--font-family-sans);
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.15s ease;
}

.input-field:focus,
.select-field:focus,
.textarea-field:focus {
  border-color: var(--color-accent);
}

.textarea-field {
  resize: vertical;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  font-size: 0.7rem;
  font-weight: 600;
  border-radius: 4px;
  background-color: var(--border-color);
  color: var(--text-secondary);
}

.badge-reviewer {
  background-color: rgba(99, 102, 241, 0.12);
  color: #a5b4fc;
}

.badge-admin {
  background-color: rgba(16, 185, 129, 0.12);
  color: #34d399;
}

.badge-diff-none { background-color: var(--bg-input); color: var(--text-secondary); }
.badge-diff-easy { background-color: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-diff-medium { background-color: rgba(245, 158, 11, 0.15); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-diff-hard { background-color: rgba(244, 63, 94, 0.15); color: #f87171; border: 1px solid rgba(244, 63, 94, 0.3); }

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.modal {
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: modalEnter 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-large {
  max-width: 620px;
}

.modal-xl {
  max-width: 780px;
  max-height: 90vh;
  overflow-y: auto;
}

.fix-instructions-box {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-color);
  border-radius: 0.45rem;
  padding: 0.75rem 0.9rem;
}
.fix-instructions-box li {
  margin-bottom: 0.25rem;
}

.fix-upload-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.fix-upload-item {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 0.6rem;
  align-items: center;
  padding: 0.5rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-color);
  border-radius: 0.4rem;
}

.fix-upload-thumb {
  width: 72px;
  height: 72px;
  border-radius: 0.3rem;
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}
.fix-upload-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.fix-upload-meta {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.fix-upload-meta .fu-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.fix-upload-meta .fu-key {
  font-size: 0.7rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.fix-upload-meta .fu-status {
  font-size: 0.7rem;
  margin-top: 0.1rem;
}
.fu-status.ok { color: var(--color-success); }
.fu-status.changed { color: var(--color-warning); }

.fix-upload-btn {
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}
.fix-upload-btn input[type=file] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.paper-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  border-radius: 0.3rem;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  text-decoration: none;
  transition: all 0.15s ease;
}
.paper-link-btn:hover {
  background: var(--border-color);
  color: #fff;
}
.paper-link-btn.qp { border-color: rgba(99,102,241,0.3); }
.paper-link-btn.ms { border-color: rgba(16,185,129,0.3); }
.paper-link-btn.er { border-color: rgba(245,158,11,0.3); }

.paper-links-fallback {
  font-size: 0.78rem;
  color: var(--text-secondary);
  padding: 0.35rem 0.6rem;
  background: rgba(255,255,255,0.03);
  border-radius: 0.3rem;
  border: 1px dashed var(--border-color);
}

.review-summary-card {
  display: flex;
  gap: 1rem;
  padding: 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: 0.6rem;
  background: rgba(255,255,255,0.03);
  margin-bottom: 0.75rem;
}

.review-summary-image {
  width: 120px;
  height: 120px;
  flex-shrink: 0;
  border-radius: 0.6rem;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: #000;
}

.review-summary-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.review-summary-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.review-summary-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.82rem;
}

.review-summary-label {
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.review-summary-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin: 0.75rem 0;
}

.review-summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0.75rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-color);
  border-radius: 0.45rem;
  font-size: 0.82rem;
}

.review-summary-upload {
  margin-top: 0.5rem;
}

.modal-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

.modal-body {
  padding: 1.25rem;
}

.modal-body p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.4;
}

.modal-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  background-color: rgba(0,0,0,0.1);
}

.error-text {
  color: var(--color-danger);
  font-size: 0.75rem;
  margin-top: 0.5rem;
}

/* Layout Grid */
#app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.main-header {
  background-color: var(--bg-panel);
  border-bottom: 1px solid var(--border-color);
  padding: 0.6rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
}

.logo h1 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02rem;
}

.logo h1 .badge {
  font-size: 0.6rem;
  margin-left: 0.25rem;
  vertical-align: middle;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#user-email-display {
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
}

.dashboard-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Left Sidebar */
.sidebar {
  width: 280px;
  background-color: var(--bg-panel);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

.sidebar-section {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-section h3 {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.tabs-navigation {
  display: flex;
  background-color: var(--bg-main);
  border-radius: 0.25rem;
  padding: 0.15rem;
  border: 1px solid var(--border-color);
}

.tab-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 0.4rem 0;
  font-family: var(--font-family-sans);
  font-weight: 500;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.1s ease;
  border-radius: 0.2rem;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--text-primary);
  background-color: var(--bg-card);
  box-shadow: var(--shadow-sm);
}

.sidebar-list-container {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem;
}

.sidebar-list {
  list-style: none;
}

.sidebar-list li {
  padding: 0.6rem 0.75rem;
  border-radius: 0.25rem;
  margin-bottom: 0.2rem;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: all 0.1s ease;
  border: 1px solid transparent;
}

.sidebar-list li:hover {
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--text-primary);
}

.sidebar-list li.active {
  background-color: rgba(99, 102, 241, 0.06);
  color: #fff;
  border-color: var(--border-color-glow);
  font-weight: 500;
}

.sidebar-list li .topic-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sidebar-list li .badge {
  font-size: 0.6rem;
}

.topic-thumbnail-wrapper {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.topic-thumbnail {
  width: 100%;
  border-radius: 0.25rem;
  border: 1px solid var(--border-color);
  object-fit: contain;
  background-color: #000;
}

/* Workspace */
.workspace {
  flex: 1;
  overflow-y: auto;
  background-color: var(--bg-main);
  position: relative;
  display: flex;
  flex-direction: column;
}

.empty-state {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  text-align: center;
  padding: 2rem;
}

.empty-state h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.empty-state p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  max-width: 350px;
  line-height: 1.5;
}

.view-header {
  padding: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-panel);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.view-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

/* Review Mode Layout */
.review-workspace {
  display: flex;
  height: 100%;
  width: 100%;
  overflow: hidden;
}

.question-display-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-right: 1px solid var(--border-color);
  background-color: var(--bg-main);
}

.display-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(17, 18, 29, 0.4);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  flex-shrink: 0;
}

.display-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

.display-header .subtext {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.15rem;
}

/* Segmented tab styling for Q/A views */
.view-tabs {
  display: flex;
  background-color: var(--bg-input);
  border-radius: 0.25rem;
  padding: 0.15rem;
}

.view-tab-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-family-sans);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.35rem 0.85rem;
  cursor: pointer;
  border-radius: 0.2rem;
  transition: all 0.1s ease;
}

.view-tab-btn.active {
  background-color: var(--color-accent);
  color: #fff;
}

.canvas-workspace {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.image-workspace {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  width: 100%;
  max-width: 800px;
}

.canvas-container {
  background-color: #fff;
  border-radius: 0.375rem;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  max-width: 100%;
  box-shadow: var(--shadow-sm);
  user-select: none;
  -webkit-user-select: none;
}

.canvas-container canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Examiner Report Section */
#examiner-report-section {
  width: 100%;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1rem;
  margin-top: 1rem;
}

.er-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.25rem;
}

.er-text {
  font-size: 0.85rem;
  color: var(--text-primary);
  line-height: 1.5;
  white-space: pre-wrap;
}

.er-image-container {
  margin-top: 0.75rem;
  width: 100%;
}

/* Right Control Sidebar */
.control-sidebar {
  width: 320px;
  background-color: var(--bg-panel);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  flex-shrink: 0;
}

.control-group {
  margin-bottom: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.control-group h3 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

/* Metadata formatting */
.metadata-panel {
  background-color: rgba(0,0,0,0.15);
  border-radius: 0.375rem;
  padding: 0.75rem;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
}

.meta-row:last-child {
  margin-bottom: 0;
}

.meta-label {
  color: var(--text-secondary);
}

.meta-val {
  font-weight: 500;
  color: var(--text-primary);
}

/* Difficulty Buttons Group */
.difficulty-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.btn-diff {
  background-color: var(--bg-input);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.5rem 0;
}

.btn-diff:hover {
  color: var(--text-primary);
  background-color: var(--border-color);
}

.btn-diff.active[data-difficulty="easy"] {
  background-color: rgba(16, 185, 129, 0.15);
  border-color: var(--color-success);
  color: var(--color-success);
  font-weight: 600;
}

.btn-diff.active[data-difficulty="medium"] {
  background-color: rgba(245, 158, 11, 0.15);
  border-color: var(--color-warning);
  color: #fbbf24;
  font-weight: 600;
}

.btn-diff.active[data-difficulty="hard"] {
  background-color: rgba(244, 63, 94, 0.15);
  border-color: var(--color-danger);
  color: #f87171;
  font-weight: 600;
}

/* Navigation & Progress */
.navigation-panel {
  border-bottom: none;
  margin-bottom: 0.75rem;
  padding-bottom: 0;
}

.nav-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.progress-bar-container {
  height: 4px;
  background-color: var(--bg-input);
  border-radius: 2px;
  overflow: hidden;
  width: 100%;
}

.progress-bar {
  height: 100%;
  background-color: var(--color-accent);
  width: 0%;
  transition: width 0.2s ease;
}

/* Shortcuts Info */
.shortcuts-helper {
  background-color: rgba(0,0,0,0.15);
  border-radius: 0.375rem;
  padding: 0.75rem;
}

.shortcuts-helper h3 {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.shortcut-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.shortcut-item:last-child {
  margin-bottom: 0;
}

.shortcut-item span:first-child {
  font-weight: 600;
  color: #fff;
  background-color: var(--bg-input);
  padding: 0.05rem 0.25rem;
  border-radius: 3px;
  border: 1px solid var(--border-color);
  font-size: 0.65rem;
}

/* Notes View Layout */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  padding: 1.25rem;
}

.note-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 140px;
}

.note-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.note-info p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.note-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Admin Queue / Moderation */
.admin-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  margin: 1.25rem;
  overflow: hidden;
}

.admin-card-header {
  padding: 0.75rem 1rem;
  background-color: rgba(0,0,0,0.15);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.admin-card-body {
  padding: 1rem;
  font-size: 0.85rem;
}

.admin-card-body p {
  margin-bottom: 0.5rem;
}

.admin-card-body blockquote {
  margin: 0.5rem 0;
  padding-left: 0.75rem;
  border-left: 2px solid var(--color-accent);
  color: var(--text-secondary);
  font-style: italic;
}

.admin-payload-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0;
}

.payload-box {
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  padding: 0.75rem;
}

.payload-box h5 {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.payload-box pre {
  font-family: monospace;
  font-size: 0.75rem;
  white-space: pre-wrap;
  word-break: break-all;
}

.admin-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--color-accent);
  color: #fff;
  padding: 0.6rem 1.25rem;
  border-radius: 0.375rem;
  font-size: 0.8rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 10000;
  animation: toastEnter 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  transition: opacity 0.2s ease;
}

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

.loading {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Dashboard Landing View */
.view-container {
  padding: 2.5rem;
  overflow-y: auto;
  height: calc(100vh - 60px);
}

.dashboard-landing-header {
  margin-bottom: 2rem;
}

.dashboard-landing-header h2 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.dashboard-landing-header .subtext {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

/* Stats Row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.stat-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: 0.75rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-md);
  transition: border-color 0.15s ease;
}

.stat-card:hover {
  border-color: var(--color-accent);
}

.stat-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.text-orange {
  color: var(--color-warning) !important;
}

.text-purple {
  color: #a855f7 !important;
}

/* Section Title */
.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

/* Subjects Grid */
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.subject-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.subject-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
}

.subject-card-header {
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
}

.subject-icon {
  font-size: 1.2rem;
  margin-right: 0.75rem;
}

.subject-name {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  flex-grow: 1;
}

.subject-percent {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.subject-progress-bars {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.progress-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.progress-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.progress-bar-bg {
  background-color: var(--bg-input);
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 3px;
  width: 0%;
  transition: width 0.3s ease;
}

/* Colors for progress bars */
.progress-bar-fill.color-blue {
  background-color: var(--color-accent);
}
.progress-bar-fill.color-green {
  background-color: var(--color-success);
}
.progress-bar-fill.color-red {
  background-color: var(--color-danger);
}

/* Back button in navigator */
.btn-back-dashboard {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.8rem;
  padding: 0.6rem;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
  font-weight: 600;
  transition: all 0.15s ease;
}

.btn-back-dashboard:hover {
  color: var(--text-primary);
  background-color: var(--border-color);
  border-color: var(--color-accent);
}

/* Notes layout with Add Form */
.notes-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 1.5rem;
  height: 100%;
}

.notes-main-content {
  overflow-y: auto;
  padding-right: 0.5rem;
}

.notes-form-panel {
  background-color: var(--bg-panel);
  border-left: 1px solid var(--border-color);
  padding: 1.5rem;
  overflow-y: auto;
}

.notes-form-panel h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.notes-drive-banner {
  background-color: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.35);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
}

.notes-instructions {
  color: #dc2626;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 0.85rem;
}

.notes-drive-banner .btn {
  margin-top: 0.25rem;
}

/* Interactive Flashcards View */
.flashcards-container {
  padding: 1rem 0;
  overflow-y: auto;
  max-height: calc(100vh - 160px);
}

.flashcards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* 3D Flipping Card effect */
.flashcard-card {
  background-color: transparent;
  perspective: 1000px;
  height: 200px;
  cursor: pointer;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  transform-style: preserve-3d;
  box-shadow: var(--shadow-md);
  border-radius: 0.75rem;
}

.flashcard-card.flipped .card-inner {
  transform: rotateY(180deg);
}

.card-front, .card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: 0.75rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border: 1px solid var(--border-color);
}

.card-front {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

.card-back {
  background-color: var(--bg-input);
  color: var(--text-primary);
  transform: rotateY(180deg);
  border-color: var(--color-accent);
}

.card-front h4 {
  font-size: 0.9rem;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.card-front p {
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.5;
}

.card-back h4 {
  font-size: 0.8rem;
  color: var(--color-success);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.card-back p {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Notes Section Overhaul */
.notes-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
  height: 100%;
}

.notes-main-content {
  overflow-y: auto;
  padding-right: 0.5rem;
}

.notes-form-panel {
  background: rgba(255, 255, 255, 0.02);
  border-left: 1px solid var(--border-color);
  padding-left: 2rem;
  overflow-y: auto;
}
.notes-form-panel h3 {
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
  color: var(--text-primary);
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  padding-bottom: 2rem;
  margin-top: 1.5rem;
}

.note-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.note-card:hover {
  transform: translateY(-2px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
}
.note-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-hover));
  opacity: 0;
  transition: opacity 0.2s ease;
}
.note-card:hover::before {
  opacity: 1;
}

.note-info {
  flex: 1;
}
.note-info h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  word-break: break-word;
}
.note-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.note-badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 4px;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.note-badge.pdf { background: rgba(244, 63, 94, 0.15); color: #f43f5e; }
.note-badge.folder { background: rgba(59, 130, 246, 0.15); color: #3b82f6; }
.note-badge.link { background: rgba(16, 185, 129, 0.15); color: #10b981; }
.note-badge.yt { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }
.note-badge.default { background: var(--bg-input); color: var(--text-secondary); }

.note-footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: auto;
}