:root {
  --bg: #f6f4f1;
  --stage: #cdd7e2;
  --panel: #ffffff;
  --panel-soft: #e8eef3;
  --panel-2: #ffffff;
  --line: #e2ddd8;
  --line-strong: #d4cdc6;
  --text: #2a3038;
  --heading: #161b22;
  --muted: #5c6770;
  --accent: #c73636;
  --accent-hover: #a82e2e;
  --accent-ink: #ffffff;
  --accent-rgb: 199, 54, 54;
  --ok: #1b7a4a;
  --ok-rgb: 27, 122, 74;
  --danger: #8a1f1f;
  --danger-rgb: 138, 31, 31;
  --overlay: rgba(22, 27, 34, 0.45);
  --paper: #ffffff;
  --ink: #161b22;
  --radius: 16px;
  --sidebar: 320px;
  --header: 72px;
  --shadow: 0 10px 24px rgba(25, 25, 25, 0.08);
  --font: "Poppins", "Segoe UI", sans-serif;
  --display: "Poppins", "Segoe UI", sans-serif;
  color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
}

button, input, select { font: inherit; color: inherit; }

button { cursor: pointer; }

button:disabled {
  opacity: 0.42;
  cursor: not-allowed;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.shell {
  display: flex;
  height: 100%;
  min-height: 100vh;
  min-height: 100dvh;
}

.sidebar {
  width: var(--sidebar);
  flex: 0 0 var(--sidebar);
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--panel);
  box-shadow: 10px 0 24px rgba(25, 25, 25, 0.04);
  border-right: 1px solid var(--line);
  color: var(--text);
}

.brand-block {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 20px 18px 8px;
}

.brand-mark {
  width: 56px;
  height: 56px;
  display: block;
  object-fit: contain;
  flex: 0 0 auto;
}

.brand-copy {
  flex: 1;
  min-width: 0;
  padding: 8px 10px 9px;
  border-radius: 12px;
  background-color: #eef2f6;
  background-image:
    linear-gradient(rgba(90, 112, 138, 0.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(90, 112, 138, 0.28) 1px, transparent 1px),
    linear-gradient(rgba(90, 112, 138, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(90, 112, 138, 0.1) 1px, transparent 1px);
  background-size: 32px 32px, 32px 32px, 8px 8px, 8px 8px;
  background-position: -1px -1px;
}

.brand {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.45rem;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--heading);
}

.brand span { color: var(--accent); }

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

.brand-tagline {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.2;
}

.brand-subject {
  display: block;
  width: 100%;
  margin: 0;
  padding: 6px 10px;
  border-radius: 8px;
  background: #98b9d4;
  color: #1b3354;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.test-timer {
  display: none;
  width: calc(100% - 36px);
  margin: 8px 18px 4px;
  padding: 8px 10px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  letter-spacing: 0.08em;
  font-size: 1.25rem;
  text-align: center;
}

.test-timer:disabled {
  opacity: 1;
  cursor: default;
}

.test-timer.active { display: block; }

.test-timer.awaiting {
  cursor: pointer;
  letter-spacing: 0.04em;
  font-size: 1.05rem;
  background: rgba(var(--accent-rgb), 0.12);
  color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(var(--accent-rgb), 0.35);
}

.test-timer.awaiting:hover {
  background: rgba(var(--accent-rgb), 0.2);
}

.exam-tools {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  width: calc(100% - 36px);
  margin: 4px 18px;
}

.sidebar.test-active .exam-tools,
.sidebar.test-ended .exam-tools { display: grid; }

.exam-tools button {
  min-height: 36px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: 30px;
  background: var(--panel);
  color: var(--text);
  font-weight: 700;
  font-size: 13px;
}

.exam-tools button:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.exam-tools button:disabled { opacity: 0.6; cursor: progress; }

.test-timer.warn { background: var(--danger); }

.test-timer.ended { animation: timerPulse 0.8s ease-in-out infinite; }

@keyframes timerPulse {
  50% { opacity: 0.45; }
}

.sidebar-scroll {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 12px 14px 8px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.session-panel {
  flex: 0 0 auto;
}

.sidebar-scroll .test-mode-btn,
.sidebar-scroll .side-btn {
  flex: 0 0 auto;
  border-radius: 12px;
}

.sidebar-scroll .side-btn {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--heading);
  font-weight: 700;
  font-size: 14px;
}

.sidebar-scroll .side-btn:hover:not(:disabled) { border-color: var(--accent); }

.sidebar-scroll .side-btn[hidden] { display: none; }

.sidebar-scroll::-webkit-scrollbar { width: 10px; }
.sidebar-scroll::-webkit-scrollbar-thumb {
  background: rgba(22, 27, 34, 0.22);
  border-radius: 99px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

.panel {
  background: var(--panel-soft);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.panel h2 {
  margin: 0;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

select,
.field input,
.file-btn,
.action-row button,
.primary,
.review-bar button,
.nav-toggle,
.account-btn,
.menu button,
.drawer-head button,
.modal-actions button {
  border-radius: 4px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  min-height: 40px;
}

select,
.field input[type="number"],
.field input[type="text"],
.field input[type="email"],
.field input[type="password"] {
  width: 100%;
  padding: 8px 12px;
  color: var(--text);
  text-transform: none;
  letter-spacing: 0;
  font-weight: 600;
  font-size: 14px;
}

select {
  appearance: none;
  color-scheme: light;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 16px) 17px, calc(100% - 11px) 17px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 28px;
}

.field.is-set select,
.field.is-set input {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.15);
}

.file-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text);
}

.file-btn input { display: none; }

.file-btn.loaded {
  background: rgba(var(--ok-rgb), 0.16);
  color: #143d28;
  border-color: rgba(var(--ok-rgb), 0.4);
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
  letter-spacing: 0;
  text-transform: none;
  font-weight: 500;
}

.hint.is-error { color: var(--danger); }

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

.chip {
  border: 0;
  background: rgba(var(--accent-rgb), 0.12);
  color: var(--accent);
  border-radius: 999px;
  min-height: 28px;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 700;
}

.chip:hover { background: rgba(var(--accent-rgb), 0.2); }

.bookmark-filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  margin-top: 10px;
  padding: 10px 14px;
  border: 2px solid rgba(var(--accent-rgb), 0.45);
  border-radius: 10px;
  background: rgba(var(--accent-rgb), 0.1);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-align: center;
  height: 44px;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(var(--accent-rgb), 0.12);
}

.bookmark-filter-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bookmark-filter-btn svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linejoin: round;
}

.bookmark-filter-btn:hover:not(:disabled) {
  background: rgba(var(--accent-rgb), 0.16);
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.18);
}

.bookmark-filter-btn.is-active svg {
  fill: var(--accent);
  stroke: var(--accent);
}

.bookmark-filter-btn[hidden] { display: none; }

.action-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.action-row button,
.block,
.review-bar button,
.nav-toggle,
.modal-actions button,
.account-btn,
.menu button,
.drawer-head button {
  padding: 0 12px;
  font-weight: 700;
  font-size: 14px;
}

.action-row button,
.file-btn,
.review-bar button,
.nav-toggle,
.account-btn,
.menu button,
.drawer-head button,
.modal-actions button,
.viewer-actions button,
.history-list button,
.chip {
  border-radius: 30px;
}

.action-row button:hover:not(:disabled),
.file-btn:hover,
.review-bar button:hover:not(:disabled):not(.primary),
.viewer-actions button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border: 2px solid var(--accent);
  border-radius: 30px;
}

.primary:hover:not(:disabled) {
  background: var(--panel);
  color: var(--heading);
  border-color: var(--accent);
}

.block { width: 100%; }

#testModeBtn.is-live {
  background: transparent;
  color: var(--danger);
  border-color: var(--accent);
}

.sidebar-foot {
  padding: 12px 16px 16px;
  border-top: 1px solid var(--line);
}

.count {
  font-weight: 800;
  font-size: 14px;
}

.review-progress {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.keys {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 11px;
}

kbd {
  font-family: inherit;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 0 4px;
}

.sidebar.test-active {
  background: #e7f3ec;
  --text: #143d28;
  --muted: #3d6a4c;
  --panel: #e7f3ec;
  --panel-soft: #f4fbf7;
  --panel-2: #ffffff;
  --line: rgba(var(--ok-rgb), 0.22);
  --line-strong: rgba(var(--ok-rgb), 0.32);
  color: #143d28;
}

.sidebar.test-active select { color-scheme: light; }

.sidebar.test-active .selection-panel,
.sidebar.test-ended .selection-panel,
.sidebar.test-active #pastExamsBtn,
.sidebar.test-ended #pastExamsBtn,
.sidebar.test-active #enterCodeBtn,
.sidebar.test-ended #enterCodeBtn { display: none; }

.sidebar.test-ended {
  background: #f8ecec;
  --text: #4a1818;
  --muted: #8f3b34;
  --panel-soft: #fff6f6;
  --panel-2: #fff;
  --line: rgba(var(--danger-rgb), 0.18);
  --line-strong: rgba(var(--danger-rgb), 0.28);
  color: #4a1818;
}

.workspace {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--stage);
}

.user-header {
  min-height: var(--header);
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 16px;
  padding: 12px 22px;
  border-bottom: 1px solid #da9593;
  background-color: #f1f1f1;
  background-image:
    linear-gradient(rgba(168, 72, 62, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 72, 62, 0.16) 1px, transparent 1px),
    linear-gradient(rgba(74, 104, 148, 0.11) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 104, 148, 0.11) 1px, transparent 1px);
  background-size: 80px 80px, 80px 80px, 20px 20px, 20px 20px;
  background-position: -1px -1px;
  box-shadow: 0 10px 15px rgba(25, 25, 25, 0.06);
}

.subject-row {
  display: flex;
  justify-content: center;
  flex: 0 1 auto;
  min-width: 0;
}

.header-actions {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}

.subject-row .subject-select {
  width: auto;
  min-width: 220px;
  max-width: 100%;
  border-radius: 8px;
  color: var(--heading);
  font-weight: 700;
  cursor: pointer;
}

.subject-row .subject-select:hover:not(:disabled),
.subject-row .subject-select:focus-visible {
  border-color: var(--accent);
}

.subject-empty {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 30px;
  border: 1px dashed var(--line-strong);
  color: var(--muted);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
}

.subject-empty:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  min-height: 44px;
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: #e7edf3;
  color: #1b3354;
  flex: 0 0 auto;
}

.nav-toggle svg {
  width: 26px;
  height: 17px;
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-toggle:hover { background: #dbe4ee; }

.nav-toggle .icon-menu { display: none; }

.nav-toggle .fold-arrow {
  transform-origin: 23.25px 9px;
  transition: transform 0.2s ease;
}

.shell.sidebar-collapsed .nav-toggle .fold-arrow { transform: scaleX(-1); }

@media (min-width: 981px) {
  .sidebar {
    transition: margin-left 0.2s ease, visibility 0.2s;
  }

  .shell.sidebar-collapsed .sidebar {
    margin-left: calc(-1 * var(--sidebar));
    visibility: hidden;
  }
}

.header-lead {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 14px;
}

.session-context {
  min-width: 0;
  flex: 1;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.user-header h1 {
  margin: 2px 0 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--heading);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.account {
  position: relative;
}

.user-icon {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--accent);
}

.user-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.user-icon .ring {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.3;
}

.profile-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
}

.profile-link:hover { color: var(--accent-hover); }

.profile-link:hover .user-icon { color: inherit; }

.profile-link:hover .ring { fill: rgba(var(--accent-rgb), 0.12); }

.user-header .profile-link,
.user-header .profile-link:hover { color: #000; }

.user-header .user-icon,
.user-header .profile-link:hover .user-icon { color: #6135d2; }

.user-header .profile-link:hover .ring { fill: rgba(97, 53, 210, 0.12); }

.account-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding-right: 14px;
  background: var(--panel-2);
}

.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 12px;
  font-weight: 800;
}

.menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  width: 240px;
  padding: 8px;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  box-shadow: var(--shadow);
  z-index: 20;
}

.menu-id {
  padding: 8px 10px 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 6px;
}

.menu-id strong { display: block; }
.menu-id span {
  color: var(--muted);
  font-size: 12px;
}

.menu button {
  width: 100%;
  text-align: left;
  background: transparent;
  border-color: transparent;
  color: var(--text);
}

.menu button:hover { background: var(--panel-soft); }

.stage {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 28px 28px 20px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.viewer {
  width: min(860px, 100%);
  background: var(--paper);
  border: 0;
  border-radius: 3px;
  padding: 14px;
  box-shadow: var(--shadow);
}

.viewer-top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 6px 12px;
}

.crumbs {
  min-width: 0;
  flex: 1;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}

.viewer-actions button {
  border-radius: 30px;
  border: 1px solid var(--line-strong);
  background: var(--panel-2);
  min-height: 36px;
  padding: 0 12px;
  font-weight: 700;
  font-size: 13px;
  color: var(--text);
}

.sample-pill {
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.12);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

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

.viewer-actions .bookmark-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.bookmark-btn svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linejoin: round;
}

.bookmark-btn[aria-pressed="true"] svg {
  fill: var(--accent);
  stroke: var(--accent);
}

.page-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 100%;
}

.page-stack canvas {
  display: block;
  width: min(8.5in, 100%);
  max-width: 100%;
  height: auto;
  background: var(--paper);
  box-shadow: 0 8px 24px rgba(25, 25, 25, 0.12);
}

.paper {
  background: var(--paper);
  color: var(--ink);
  border-radius: 8px;
  padding: 34px 40px 28px;
  min-height: 460px;
}

.paper-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(22, 27, 34, 0.14);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 800;
}

.paper h2 {
  font-family: var(--display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--heading);
  margin: 18px 0 8px;
}

.paper-lead {
  margin: 0 0 18px;
  color: var(--muted);
}

.part {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  margin: 0 0 14px;
  line-height: 1.5;
}

.part p { margin: 0; }

.marks { font-weight: 700; color: var(--accent); }

.working-lines {
  margin-top: 18px;
  height: 280px;
  border-radius: 6px;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 31px,
    rgba(22, 27, 34, 0.12) 31px 32px
  );
}

.paper-total {
  margin-top: 8px;
  text-align: right;
  font-size: 13px;
  font-weight: 800;
  color: var(--muted);
}

.empty {
  padding: 48px 20px;
  text-align: center;
  color: var(--muted);
}

.empty h2 {
  margin: 0 0 8px;
  color: var(--text);
  font-family: var(--display);
  font-weight: 700;
  color: var(--heading);
}

.review-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 12px 18px;
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.sitting {
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  min-height: 1em;
}

.topics {
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.caption { min-width: 0; }

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.qnav { display: flex; align-items: center; gap: 6px; }

.modal-backdrop,
.drawer-backdrop,
.scrim {
  position: fixed;
  inset: 0;
}

.modal-backdrop,
.drawer-backdrop {
  z-index: 40;
  display: none;
  background: var(--overlay);
}

.modal-backdrop.open,
.drawer-backdrop.open { display: flex; }

.modal-backdrop { align-items: center; justify-content: center; padding: 16px; }

.modal {
  width: min(440px, 100%);
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.modal h2 {
  margin: 0 0 6px;
  font-family: var(--display);
  font-weight: 700;
  color: var(--heading);
  font-size: 1.7rem;
}

.modal p {
  margin: 0 0 16px;
  color: var(--muted);
  line-height: 1.45;
  font-size: 14px;
}

.modal .field { margin-bottom: 10px; }

#confirmModal { z-index: 50; }

.confirm-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.confirm-head h2 { margin: 0; font-size: 1.4rem; }

.info-badge {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #e3edf9;
  color: #2a5d9f;
  font-family: Georgia, serif;
  font-style: italic;
  font-weight: 700;
  font-size: 1.1rem;
}

.info-badge svg,
.exam-remove svg,
.past-exam-remove svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.confirm-modal.is-danger .info-badge {
  background: #fbe5e5;
  color: var(--danger);
}

.confirm-modal.is-danger .modal-actions button.primary {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.confirm-modal.is-danger .modal-actions button.primary:hover:not(:disabled) {
  background: var(--panel);
  color: var(--danger);
}

#loginForm {
  max-height: calc(100dvh - 32px);
  overflow: auto;
}

.signup-only {
  margin: 0;
  padding: 0;
  border: 0;
  min-width: 0;
}

.signup-only[hidden] { display: none; }

.field-optional {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
}
.modal .field input { background: var(--panel-2); }

.auth-forgot {
  display: block;
  margin: -2px 0 12px auto;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
}

.auth-forgot:hover:not(:disabled) { text-decoration: underline; }

.auth-forgot[hidden] { display: none; }

.auth-switch {
  display: block;
  width: 100%;
  margin: 12px 0 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--accent);
  font-weight: 700;
  text-align: center;
}

.modal.test-setup {
  width: min(680px, 100%);
  max-height: min(92vh, 900px);
  overflow: auto;
}

.time-fields {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 8px;
}

.test-topics { margin: 4px 0 12px; }

.test-topics-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.test-topic-meta {
  letter-spacing: 0;
  text-transform: none;
  font-weight: 600;
  font-size: 12px;
  text-align: right;
}

.topic-tools {
  display: flex;
  gap: 12px;
  margin-bottom: 8px;
}

.topic-tools button {
  border: 0;
  background: transparent;
  color: var(--accent);
  min-height: 0;
  padding: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
}

.topic-tools button:hover:not(:disabled) { text-decoration: underline; }

.topic-picker {
  max-height: 240px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  background: var(--panel-soft);
}

.topic-picker .hint { margin: 0; }

.topic-group + .topic-group { margin-top: 10px; }

.topic-group h3 {
  margin: 0 0 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.topic-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.topic-chip {
  border: 1px solid var(--line-strong);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 999px;
  min-height: 30px;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
}

.topic-chip.is-selected {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.error-note {
  display: none;
  color: var(--danger);
  font-size: 13px;
  margin-bottom: 10px;
}

.error-note.show { display: block; }

.modal .error-note { color: var(--danger); }

.modal .error-note.is-ok { color: var(--ok); }

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}

#loginForm .modal-actions { justify-content: center; }

.modal-actions button.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border: 2px solid var(--accent);
}

.modal-actions button.primary:hover:not(:disabled) {
  background: var(--panel);
  color: var(--heading);
  border-color: var(--accent);
}

.drawer-backdrop { justify-content: flex-end; }

.drawer {
  width: min(380px, 100%);
  height: 100%;
  background: var(--panel);
  border-left: 1px solid var(--line-strong);
  padding: 22px 18px;
  overflow: auto;
  box-shadow: var(--shadow);
}

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.drawer-head h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  color: var(--heading);
}

.history-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.history-list button {
  width: 100%;
  text-align: left;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel-soft);
  color: var(--text);
  padding: 12px;
}

.history-list button:hover { border-color: var(--accent); }

.history-list strong { display: block; }
.history-list span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.exam-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}

.history-list .exam-open { flex: 1; min-width: 0; }

.history-list .exam-share,
.history-list .exam-remove {
  width: auto;
  flex: 0 0 auto;
  border-radius: 14px;
  background: var(--panel);
}

.history-list .exam-remove {
  display: grid;
  place-items: center;
  padding: 0 14px;
  color: var(--danger);
}

.history-list .exam-remove:hover:not(:disabled) {
  border-color: var(--danger);
  background: #fbe5e5;
}

.history-list .exam-share.is-code {
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}

.class-code {
  width: 100%;
  margin: 8px 0 4px;
  min-height: 64px;
  padding: 8px 12px;
  border: 0;
  border-radius: 12px;
  background: var(--panel-soft);
  color: var(--heading);
  text-align: center;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.scrim {
  z-index: 25;
  background: var(--overlay);
}

.scrim[hidden] { display: none; }

@media (max-width: 980px) {
  .nav-toggle .icon-menu { display: block; }

  .nav-toggle .icon-fold { display: none; }

  .user-header .session-context,
  .user-header .profile-link { display: none; }

  .user-header {
    flex-wrap: nowrap;
    gap: 10px;
    padding: 10px 14px;
  }

  .subject-row { flex: 1 1 auto; }

  .header-lead,
  .header-actions { flex: 0 0 auto; }

  .subject-row .subject-select {
    width: 100%;
    min-width: 0;
    max-width: 240px;
    text-overflow: ellipsis;
  }

  .subject-empty {
    min-width: 0;
    padding: 0 12px;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .viewer-top .crumbs { display: none; }

  .viewer-actions { margin-left: auto; }

  .sidebar {
    position: fixed;
    z-index: 30;
    inset: 0 auto 0 0;
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    box-shadow: var(--shadow);
  }

  .sidebar.is-open { transform: none; }

  .review-bar {
    grid-template-columns: minmax(0, 1fr);
    align-items: stretch;
  }

  .caption { text-align: center; }

  .topics {
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .paper { padding: 22px 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .test-timer.ended { animation: none; }
  .sidebar { transition: none; }
}