:root {
  --ink-950: #07111f;
  --ink-900: #0b1728;
  --ink-800: #12243b;
  --ink-700: #243b55;
  --ink-600: #3d5269;
  --ink-500: #62748a;
  --ink-400: #8c9aac;
  --ink-300: #bcc6d2;
  --ink-200: #d8e0e8;
  --ink-100: #eaf0f5;
  --ink-50: #f6f8fb;
  --blue-700: #174bc6;
  --blue-600: #2364e8;
  --blue-500: #3d7cf2;
  --blue-100: #dfeaff;
  --cyan-500: #16b6c8;
  --cyan-100: #d9f8fb;
  --green-700: #17653a;
  --green-600: #1f8a4c;
  --green-100: #def7e8;
  --amber-700: #8b5a00;
  --amber-500: #e9a313;
  --amber-100: #fff2c9;
  --red-700: #9b2834;
  --red-600: #c43a49;
  --red-100: #ffe2e5;
  --white: #ffffff;
  --surface: #ffffff;
  --surface-muted: #f6f8fb;
  --border: #dce4ec;
  --shadow-sm: 0 1px 2px rgba(7, 17, 31, 0.05);
  --shadow-md: 0 12px 30px rgba(7, 17, 31, 0.08);
  --shadow-lg: 0 24px 70px rgba(7, 17, 31, 0.14);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--ink-50);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink-900);
  background: var(--ink-50);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 9999;
  transform: translateY(-150%);
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--white);
  color: var(--ink-950);
  box-shadow: var(--shadow-md);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(220, 228, 236, 0.9);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: -0.025em;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--white);
  background: linear-gradient(145deg, var(--blue-600), var(--cyan-500));
  box-shadow: 0 8px 18px rgba(35, 100, 232, 0.25);
  font-size: 0.95rem;
  letter-spacing: -0.04em;
}

.brand-copy {
  display: grid;
  line-height: 1.1;
}

.brand-copy small {
  margin-top: 3px;
  color: var(--ink-500);
  font-size: 0.7rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--ink-600);
  font-size: 0.94rem;
  font-weight: 650;
}

.header-nav a:hover,
.header-nav a:focus-visible {
  color: var(--blue-700);
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 10px 16px;
  cursor: pointer;
  font-weight: 750;
  line-height: 1.15;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.button:focus-visible,
.palette-button:focus-visible,
.answer-option:focus-within,
.icon-button:focus-visible,
.filter-button:focus-visible {
  outline: 3px solid rgba(61, 124, 242, 0.28);
  outline-offset: 2px;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.56;
}

.button-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--blue-600), var(--blue-700));
  box-shadow: 0 10px 20px rgba(35, 100, 232, 0.2);
}

.button-primary:hover:not(:disabled) {
  box-shadow: 0 14px 26px rgba(35, 100, 232, 0.28);
}

.button-secondary {
  color: var(--ink-800);
  background: var(--white);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.button-secondary:hover:not(:disabled) {
  border-color: var(--ink-300);
  background: var(--ink-50);
}

.button-ghost {
  color: var(--ink-600);
  background: transparent;
  border-color: transparent;
}

.button-ghost:hover:not(:disabled) {
  color: var(--ink-900);
  background: var(--ink-100);
}

.button-danger {
  color: var(--red-700);
  background: var(--red-100);
  border-color: #ffc7cd;
}

.button-small {
  min-height: 36px;
  padding: 7px 11px;
  border-radius: 9px;
  font-size: 0.86rem;
}

.button-block {
  width: 100%;
}

.is-loading::before {
  content: "";
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.demo-banner {
  padding: 10px 16px;
  color: #714700;
  background: var(--amber-100);
  border-bottom: 1px solid #f2d887;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 650;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 72px;
  background:
    radial-gradient(circle at 12% 12%, rgba(22, 182, 200, 0.14), transparent 32%),
    radial-gradient(circle at 85% 6%, rgba(35, 100, 232, 0.13), transparent 34%),
    linear-gradient(180deg, #ffffff, #f6f8fb);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -15% -220px;
  height: 330px;
  border-radius: 50%;
  background: rgba(35, 100, 232, 0.04);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  align-items: center;
  gap: 64px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--blue-700);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan-500);
}

.hero h1 {
  max-width: 760px;
  margin: 18px 0 20px;
  color: var(--ink-950);
  font-size: clamp(2.65rem, 6vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: -0.062em;
}

.hero h1 span {
  color: var(--blue-600);
}

.hero-copy > p {
  max-width: 690px;
  margin: 0;
  color: var(--ink-600);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.trust-line {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 26px;
  color: var(--ink-500);
  font-size: 0.9rem;
  font-weight: 620;
}

.trust-line span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.trust-line span::before {
  content: "✓";
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--green-700);
  background: var(--green-100);
  font-size: 0.72rem;
  font-weight: 900;
}

.hero-preview {
  position: relative;
  padding: 22px;
  border: 1px solid rgba(216, 224, 232, 0.9);
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
}

.preview-window {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--white);
}

.preview-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--ink-50);
}

.preview-toolbar i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-300);
}

.preview-toolbar span {
  margin-left: auto;
  color: var(--ink-500);
  font-size: 0.74rem;
  font-weight: 700;
}

.preview-body {
  padding: 26px;
}

.preview-kicker {
  color: var(--blue-700);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.preview-question {
  margin: 12px 0 18px;
  color: var(--ink-900);
  font-size: 1.08rem;
  font-weight: 760;
  line-height: 1.45;
}

.preview-answer {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 9px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 11px;
  color: var(--ink-600);
  font-size: 0.88rem;
}

.preview-answer b {
  width: 25px;
  height: 25px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 7px;
  color: var(--ink-700);
  background: var(--ink-100);
  font-size: 0.76rem;
}

.preview-answer.is-selected {
  color: var(--blue-700);
  border-color: #9dbcf9;
  background: #f3f7ff;
}

.preview-answer.is-selected b {
  color: var(--white);
  background: var(--blue-600);
}

.floating-chip {
  position: absolute;
  right: -22px;
  bottom: 36px;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--green-700);
  background: var(--white);
  box-shadow: var(--shadow-md);
  font-size: 0.82rem;
  font-weight: 780;
}

.stats-strip {
  position: relative;
  z-index: 2;
  margin-top: -26px;
}

.stats-card {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow-md);
}

.stat-item {
  padding: 24px 28px;
  text-align: center;
}

.stat-item + .stat-item {
  border-left: 1px solid var(--border);
}

.stat-value {
  display: block;
  color: var(--ink-950);
  font-size: 2rem;
  font-weight: 850;
  letter-spacing: -0.045em;
}

.stat-label {
  color: var(--ink-500);
  font-size: 0.86rem;
  font-weight: 650;
}

.section {
  padding: 86px 0;
}

.section-white {
  background: var(--white);
}

.section-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 34px;
}

.section-header h2 {
  margin: 8px 0 0;
  color: var(--ink-950);
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.section-header p {
  max-width: 560px;
  margin: 10px 0 0;
  color: var(--ink-500);
}

.search-box {
  position: relative;
  width: min(100%, 340px);
}

.search-box input {
  width: 100%;
  min-height: 46px;
  padding: 11px 14px 11px 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--ink-900);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.search-box::before {
  content: "⌕";
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-52%);
  color: var(--ink-400);
  font-size: 1.4rem;
}

.search-box input:focus {
  outline: 3px solid rgba(61, 124, 242, 0.18);
  border-color: var(--blue-500);
}

.quiz-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.quiz-card {
  display: flex;
  flex-direction: column;
  min-height: 330px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.quiz-card:hover {
  transform: translateY(-3px);
  border-color: #bfd0e2;
  box-shadow: var(--shadow-md);
}

.quiz-card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.score-chip,
.topic-label,
.difficulty-chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 5px 9px;
  font-size: 0.72rem;
  font-weight: 780;
}

.score-chip {
  color: var(--green-700);
  background: var(--green-100);
}

.quiz-card h3 {
  margin: 22px 0 10px;
  color: var(--ink-950);
  font-size: 1.3rem;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.quiz-card p {
  margin: 0;
  color: var(--ink-500);
  font-size: 0.94rem;
}

.quiz-card-meta {
  display: flex;
  gap: 14px;
  margin: auto 0 20px;
  padding-top: 26px;
  color: var(--ink-600);
  font-size: 0.83rem;
  font-weight: 680;
}

.quiz-card-meta span + span::before {
  content: "·";
  margin-right: 14px;
  color: var(--ink-300);
}

.loading-panel,
.empty-panel,
.error-panel {
  grid-column: 1 / -1;
  padding: 46px 28px;
  border: 1px dashed var(--ink-300);
  border-radius: var(--radius-md);
  color: var(--ink-500);
  background: var(--white);
  text-align: center;
}

.loading-dots {
  display: inline-flex;
  gap: 6px;
  margin-bottom: 12px;
}

.loading-dots i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue-500);
  animation: pulse 900ms ease-in-out infinite alternate;
}

.loading-dots i:nth-child(2) { animation-delay: 150ms; }
.loading-dots i:nth-child(3) { animation-delay: 300ms; }

@keyframes pulse {
  to { opacity: 0.25; transform: translateY(-4px); }
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.feature-card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-muted);
}

.feature-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: var(--blue-700);
  background: var(--blue-100);
  font-size: 1.2rem;
  font-weight: 850;
}

.feature-card h3 {
  margin: 20px 0 8px;
  font-size: 1.12rem;
  letter-spacing: -0.02em;
}

.feature-card p {
  margin: 0;
  color: var(--ink-500);
  font-size: 0.92rem;
}

.cta-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 34px;
  padding: 42px;
  border-radius: var(--radius-lg);
  color: var(--white);
  background:
    radial-gradient(circle at 92% 8%, rgba(22, 182, 200, 0.34), transparent 30%),
    linear-gradient(135deg, var(--ink-950), #15345f);
  box-shadow: var(--shadow-lg);
}

.cta-panel h2 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.cta-panel p {
  max-width: 690px;
  margin: 0;
  color: #c4d2e3;
}

.site-footer {
  padding: 34px 0;
  border-top: 1px solid var(--border);
  color: var(--ink-500);
  background: var(--white);
  font-size: 0.86rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

/* Quiz intro */
.quiz-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 50% -20%, rgba(35, 100, 232, 0.12), transparent 38%),
    var(--ink-50);
}

.quiz-intro-wrap {
  width: min(calc(100% - 40px), 850px);
  margin: 70px auto;
}

.intro-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--white);
  box-shadow: var(--shadow-lg);
}

.intro-card-header {
  padding: 44px 46px 34px;
  color: var(--white);
  background:
    radial-gradient(circle at 88% 12%, rgba(22, 182, 200, 0.45), transparent 32%),
    linear-gradient(135deg, var(--ink-950), #153d73);
}

.intro-card-header h1 {
  margin: 14px 0 12px;
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  line-height: 1.02;
  letter-spacing: -0.052em;
}

.intro-card-header p {
  max-width: 680px;
  margin: 0;
  color: #cfdaea;
  font-size: 1.02rem;
}

.intro-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--border);
}

.intro-meta-item {
  padding: 20px 24px;
  text-align: center;
}

.intro-meta-item + .intro-meta-item {
  border-left: 1px solid var(--border);
}

.intro-meta-item strong {
  display: block;
  color: var(--ink-900);
  font-size: 0.98rem;
}

.intro-meta-item span {
  color: var(--ink-500);
  font-size: 0.78rem;
}

.intro-card-body {
  padding: 34px 46px 42px;
}

.intro-card-body h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
}

.rich-text p {
  margin: 0 0 0.8em;
}

.rich-text p:last-child {
  margin-bottom: 0;
}

.rich-text ul {
  margin: 0.45em 0 0.8em;
  padding-left: 1.35em;
}

.rich-text code {
  padding: 1px 5px;
  border-radius: 5px;
  background: var(--ink-100);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

.text-spacer {
  height: 0.6em;
}

.intro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.resume-note {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--amber-700);
  background: var(--amber-100);
  font-size: 0.86rem;
}

/* Exam interface */
.exam-view {
  min-height: calc(100vh - 72px);
}

.exam-topbar {
  position: sticky;
  top: 72px;
  z-index: 80;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.exam-topbar-inner {
  width: min(calc(100% - 32px), 1380px);
  min-height: 68px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr minmax(220px, 420px) auto;
  align-items: center;
  gap: 24px;
}

.exam-title-group {
  min-width: 0;
}

.exam-title-group span {
  display: block;
  overflow: hidden;
  color: var(--ink-900);
  font-weight: 780;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.exam-title-group small {
  color: var(--ink-500);
  font-size: 0.74rem;
}

.exam-progress {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--ink-100);
}

.exam-progress > div {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--blue-600), var(--cyan-500));
  transition: width 220ms ease;
}

.exam-timer {
  min-width: 92px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 10px;
  color: var(--ink-800);
  background: var(--ink-100);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

.exam-timer.is-warning {
  color: var(--red-700);
  background: var(--red-100);
}

.exam-layout {
  width: min(calc(100% - 32px), 1380px);
  margin: 30px auto 46px;
  display: grid;
  grid-template-columns: 265px minmax(0, 1fr);
  align-items: start;
  gap: 24px;
}

.exam-sidebar {
  position: sticky;
  top: 164px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.sidebar-header h2 {
  margin: 0;
  font-size: 0.96rem;
}

.icon-button {
  width: 36px;
  height: 36px;
  display: inline-grid;
  place-items: center;
  border: 0;
  border-radius: 9px;
  color: var(--ink-600);
  background: var(--ink-100);
  cursor: pointer;
}

.close-palette {
  display: none;
}

.question-palette {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 7px;
}

.palette-button {
  aspect-ratio: 1;
  position: relative;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--ink-600);
  background: var(--white);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 750;
}

.palette-button:hover {
  border-color: var(--blue-500);
}

.palette-button.is-answered {
  color: var(--blue-700);
  border-color: #afc7fb;
  background: var(--blue-100);
}

.palette-button.is-current {
  color: var(--white);
  border-color: var(--blue-700);
  background: var(--blue-700);
  box-shadow: 0 6px 12px rgba(35, 100, 232, 0.24);
}

.palette-button.is-marked::after {
  content: "";
  position: absolute;
  right: 4px;
  top: 4px;
  width: 6px;
  height: 6px;
  border: 1px solid var(--white);
  border-radius: 50%;
  background: var(--amber-500);
}

.exam-status-list {
  display: grid;
  gap: 8px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--ink-600);
  font-size: 0.8rem;
}

.exam-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.exam-status-row strong {
  color: var(--ink-900);
}

.palette-legend {
  display: grid;
  gap: 8px;
  margin-top: 17px;
  color: var(--ink-500);
  font-size: 0.74rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.legend-dot {
  width: 11px;
  height: 11px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--white);
}

.legend-dot.answered { background: var(--blue-100); border-color: #afc7fb; }
.legend-dot.marked { background: var(--amber-500); border-color: var(--amber-500); }

.exam-main {
  min-width: 0;
}

.mobile-exam-tools {
  display: none;
  margin-bottom: 12px;
}

.question-card {
  padding: 34px 38px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow-md);
  outline: none;
}

.question-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}

.question-card-header-left {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.question-number {
  color: var(--blue-700);
  font-size: 0.8rem;
  font-weight: 820;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.topic-label {
  color: var(--ink-600);
  background: var(--ink-100);
}

.difficulty-chip {
  text-transform: capitalize;
}

.difficulty-easy { color: var(--green-700); background: var(--green-100); }
.difficulty-medium { color: var(--amber-700); background: var(--amber-100); }
.difficulty-hard { color: var(--red-700); background: var(--red-100); }
.difficulty-unrated { color: var(--ink-600); background: var(--ink-100); }

.mark-button {
  min-height: 38px;
  padding: 8px 11px;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--ink-600);
  background: var(--white);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 730;
}

.mark-button.is-active {
  color: var(--amber-700);
  border-color: #efd273;
  background: var(--amber-100);
}

.question-prompt {
  color: var(--ink-950);
  font-size: clamp(1.12rem, 2vw, 1.35rem);
  font-weight: 680;
  line-height: 1.55;
}

.option-list {
  display: grid;
  gap: 11px;
  margin-top: 28px;
}

.answer-option {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 13px;
  padding: 15px 16px;
  border: 1px solid var(--border);
  border-radius: 13px;
  color: var(--ink-700);
  background: var(--white);
  cursor: pointer;
  transition: border-color 150ms ease, background 150ms ease, box-shadow 150ms ease;
}

.answer-option:hover {
  border-color: #a9bcd0;
  background: var(--ink-50);
}

.answer-option.is-selected {
  color: var(--ink-900);
  border-color: var(--blue-500);
  background: #f3f7ff;
  box-shadow: 0 0 0 3px rgba(61, 124, 242, 0.09);
}

.answer-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.option-letter {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 9px;
  color: var(--ink-700);
  background: var(--ink-100);
  font-size: 0.8rem;
  font-weight: 820;
}

.answer-option.is-selected .option-letter {
  color: var(--white);
  background: var(--blue-600);
}

.option-text {
  min-width: 0;
  padding-top: 3px;
}

.option-text p,
.review-option-copy p {
  margin: 0;
}

.question-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 18px;
}

.question-controls-right {
  display: flex;
  gap: 10px;
}

.keyboard-hint {
  margin-top: 14px;
  color: var(--ink-400);
  font-size: 0.75rem;
  text-align: center;
}

/* Results */
.results-wrap {
  width: min(calc(100% - 40px), 1060px);
  margin: 54px auto 80px;
}

.result-hero {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 34px;
  padding: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow-md);
}

.score-ring {
  --score-angle: 0deg;
  width: 150px;
  height: 150px;
  display: grid;
  place-items: center;
  position: relative;
  border-radius: 50%;
  background: conic-gradient(var(--blue-600) var(--score-angle), var(--ink-100) 0);
}

.score-ring::before {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  background: var(--white);
}

.score-ring-copy {
  position: relative;
  z-index: 1;
  text-align: center;
}

.score-ring-copy strong {
  display: block;
  color: var(--ink-950);
  font-size: 2rem;
  line-height: 1;
  letter-spacing: -0.04em;
}

.score-ring-copy span {
  color: var(--ink-500);
  font-size: 0.72rem;
  font-weight: 700;
}

.result-copy h1 {
  margin: 6px 0 8px;
  color: var(--ink-950);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.result-copy p {
  margin: 0;
  color: var(--ink-500);
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 18px 0 34px;
}

.result-stat {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--white);
  text-align: center;
}

.result-stat strong {
  display: block;
  color: var(--ink-950);
  font-size: 1.35rem;
}

.result-stat span {
  color: var(--ink-500);
  font-size: 0.76rem;
}

.review-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.review-heading h2 {
  margin: 0;
  font-size: 1.65rem;
  letter-spacing: -0.035em;
}

.review-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.filter-button {
  min-height: 36px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--ink-600);
  background: var(--white);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 720;
}

.filter-button.is-active {
  color: var(--white);
  border-color: var(--blue-700);
  background: var(--blue-700);
}

.review-list {
  display: grid;
  gap: 18px;
}

.review-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.review-card.review-correct { border-top: 4px solid var(--green-600); }
.review-card.review-incorrect { border-top: 4px solid var(--red-600); }

.review-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
  background: var(--ink-50);
}

.review-card-header > div {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
}

.review-status,
.review-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 0.7rem;
  font-weight: 780;
}

.status-correct,
.correct-badge { color: var(--green-700); background: var(--green-100); }
.status-incorrect { color: var(--red-700); background: var(--red-100); }
.status-marked { color: var(--amber-700); background: var(--amber-100); }
.selected-badge { color: var(--red-700); background: var(--red-100); }

.review-prompt {
  padding: 24px 24px 8px;
  color: var(--ink-950);
  font-size: 1.04rem;
  font-weight: 680;
}

.review-options {
  display: grid;
  gap: 9px;
  padding: 16px 24px 24px;
}

.review-option {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--white);
}

.review-option.is-correct {
  border-color: #8cd4aa;
  background: #f4fcf7;
}

.review-option.is-user-wrong {
  border-color: #f0a6ae;
  background: #fff7f8;
}

.review-option-main {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 12px;
  padding: 13px 14px;
}

.review-option-copy {
  padding-top: 3px;
  color: var(--ink-700);
}

.option-explanation {
  padding: 11px 14px 13px 56px;
  border-top: 1px solid rgba(216, 224, 232, 0.8);
  color: var(--ink-600);
  font-size: 0.86rem;
}

.explanation-panel {
  padding: 22px 24px 24px;
  border-top: 1px solid var(--border);
  background: #f7faff;
}

.explanation-panel h4 {
  margin: 0 0 10px;
  color: var(--blue-700);
  font-size: 0.9rem;
}

.teaching-point {
  margin-top: 16px;
  padding: 12px 14px;
  border-left: 3px solid var(--cyan-500);
  border-radius: 0 9px 9px 0;
  color: var(--ink-700);
  background: var(--cyan-100);
  font-size: 0.9rem;
}

.reference-line {
  margin-top: 12px;
  color: var(--ink-500);
  font-size: 0.78rem;
}

/* Generic forms and admin */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.form-field {
  display: grid;
  gap: 7px;
}

.form-field.full {
  grid-column: 1 / -1;
}

.form-field label,
.field-label {
  color: var(--ink-700);
  font-size: 0.82rem;
  font-weight: 750;
}

.form-field small {
  color: var(--ink-500);
  font-size: 0.74rem;
}

.form-control {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--ink-900);
  background: var(--white);
}

textarea.form-control {
  min-height: 110px;
  resize: vertical;
}

.form-control:focus {
  outline: 3px solid rgba(61, 124, 242, 0.16);
  border-color: var(--blue-500);
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-700);
  font-size: 0.86rem;
  font-weight: 650;
}

.checkbox-row input {
  width: 18px;
  height: 18px;
  accent-color: var(--blue-600);
}

.admin-body {
  min-height: 100vh;
  background: #f3f6fa;
}

.admin-shell {
  min-height: calc(100vh - 72px);
}

.login-wrap {
  width: min(calc(100% - 40px), 460px);
  margin: 70px auto;
}

.login-card,
.admin-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.login-card {
  padding: 34px;
}

.login-card h1 {
  margin: 12px 0 8px;
  font-size: 2rem;
  letter-spacing: -0.04em;
}

.login-card > p {
  margin: 0 0 24px;
  color: var(--ink-500);
}

.admin-layout {
  width: min(calc(100% - 32px), 1420px);
  margin: 28px auto 60px;
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  align-items: start;
  gap: 22px;
}

.admin-sidebar {
  position: sticky;
  top: 100px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--white);
}

.admin-nav {
  display: grid;
  gap: 5px;
}

.admin-nav button {
  width: 100%;
  min-height: 42px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 0;
  border-radius: 9px;
  padding: 9px 11px;
  color: var(--ink-600);
  background: transparent;
  cursor: pointer;
  text-align: left;
  font-size: 0.88rem;
  font-weight: 690;
}

.admin-nav button:hover,
.admin-nav button.is-active {
  color: var(--blue-700);
  background: var(--blue-100);
}

.admin-main {
  min-width: 0;
}

.admin-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.admin-page-header h1,
.admin-page-header h2 {
  margin: 0;
  color: var(--ink-950);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  letter-spacing: -0.045em;
}

.admin-page-header p {
  margin: 6px 0 0;
  color: var(--ink-500);
}

.admin-panel {
  padding: 24px;
}

.admin-panel + .admin-panel {
  margin-top: 18px;
}

.admin-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.admin-panel-header h2,
.admin-panel-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.admin-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.admin-stat {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--white);
}

.admin-stat strong {
  display: block;
  color: var(--ink-950);
  font-size: 1.8rem;
  letter-spacing: -0.04em;
}

.admin-stat span {
  color: var(--ink-500);
  font-size: 0.78rem;
  font-weight: 650;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  font-size: 0.84rem;
}

.data-table th,
.data-table td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}

.data-table th {
  color: var(--ink-500);
  background: var(--ink-50);
  font-size: 0.72rem;
  font-weight: 780;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr:hover {
  background: #fafcff;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 0.7rem;
  font-weight: 780;
}

.status-published { color: var(--green-700); background: var(--green-100); }
.status-draft { color: var(--ink-600); background: var(--ink-100); }
.status-progress { color: var(--amber-700); background: var(--amber-100); }

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

.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.import-dropzone {
  padding: 26px;
  border: 2px dashed var(--ink-300);
  border-radius: 13px;
  background: var(--ink-50);
  text-align: center;
}

.import-dropzone.is-dragging {
  border-color: var(--blue-500);
  background: var(--blue-100);
}

.import-dropzone input {
  max-width: 100%;
}

.import-paste {
  min-height: 210px !important;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  line-height: 1.45;
}

.import-help {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-top: 12px;
  color: var(--ink-500);
  font-size: 0.78rem;
}

.import-preview {
  margin-top: 16px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--white);
}

.validation-errors {
  margin: 10px 0 0;
  padding: 12px 14px 12px 30px;
  border-radius: 10px;
  color: var(--red-700);
  background: var(--red-100);
  font-size: 0.8rem;
}

.question-list {
  display: grid;
  gap: 10px;
}

.admin-question-row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  align-items: center;
  gap: 13px;
  padding: 13px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--white);
}

.question-position {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: var(--blue-700);
  background: var(--blue-100);
  font-size: 0.8rem;
  font-weight: 820;
}

.admin-question-copy {
  min-width: 0;
}

.admin-question-copy strong {
  display: block;
  overflow: hidden;
  color: var(--ink-900);
  font-size: 0.88rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.admin-question-copy span {
  color: var(--ink-500);
  font-size: 0.75rem;
}

.demo-mode-notice,
.config-notice {
  margin-bottom: 18px;
  padding: 13px 15px;
  border: 1px solid #f0d582;
  border-radius: 11px;
  color: var(--amber-700);
  background: var(--amber-100);
  font-size: 0.84rem;
}

.dialog-backdrop {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(7, 17, 31, 0.62);
  backdrop-filter: blur(4px);
}

.dialog-card {
  width: min(100%, 900px);
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-lg);
}

.dialog-header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
  background: var(--white);
}

.dialog-header h2 {
  margin: 0;
  font-size: 1.2rem;
}

.dialog-body {
  padding: 22px;
}

.dialog-footer {
  position: sticky;
  bottom: 0;
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 16px 22px;
  border-top: 1px solid var(--border);
  background: var(--white);
}

.option-editor-grid {
  display: grid;
  gap: 12px;
  margin-top: 10px;
}

.option-editor-row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.option-editor-label {
  width: 38px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  color: var(--ink-700);
  background: var(--ink-100);
  font-weight: 820;
}

.toast-region {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 1000;
  display: grid;
  gap: 9px;
  width: min(calc(100% - 36px), 370px);
}

.toast {
  transform: translateY(12px);
  opacity: 0;
  padding: 13px 15px;
  border: 1px solid var(--border);
  border-radius: 11px;
  color: var(--ink-800);
  background: var(--white);
  box-shadow: var(--shadow-lg);
  font-size: 0.86rem;
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast-visible {
  transform: translateY(0);
  opacity: 1;
}

.toast-success { border-left: 4px solid var(--green-600); }
.toast-error { border-left: 4px solid var(--red-600); }
.toast-info { border-left: 4px solid var(--blue-600); }

@media (max-width: 1050px) {
  .hero-grid { grid-template-columns: 1fr; gap: 42px; }
  .hero-preview { width: min(100%, 620px); }
  .quiz-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .exam-layout { grid-template-columns: 230px minmax(0, 1fr); }
  .admin-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 800px) {
  .container { width: min(calc(100% - 28px), var(--max-width)); }
  .header-nav a:not(.button) { display: none; }
  .hero { padding: 62px 0 56px; }
  .hero h1 { font-size: clamp(2.7rem, 13vw, 4.2rem); }
  .floating-chip { right: 8px; bottom: 12px; }
  .section { padding: 64px 0; }
  .section-header { align-items: stretch; flex-direction: column; }
  .search-box { width: 100%; }
  .cta-panel { grid-template-columns: 1fr; padding: 30px; }
  .intro-card-header, .intro-card-body { padding-left: 28px; padding-right: 28px; }
  .exam-topbar-inner { grid-template-columns: 1fr auto; gap: 14px; }
  .exam-progress { grid-column: 1 / -1; grid-row: 2; margin-bottom: 10px; }
  .exam-layout { grid-template-columns: 1fr; }
  .exam-sidebar {
    position: fixed;
    inset: 0 0 0 auto;
    z-index: 200;
    width: min(88vw, 330px);
    border-radius: 0;
    transform: translateX(105%);
    transition: transform 190ms ease;
    box-shadow: var(--shadow-lg);
  }
  .exam-sidebar.is-open { transform: translateX(0); }
  .close-palette { display: inline-grid; }
  .mobile-exam-tools { display: flex; justify-content: flex-end; }
  .result-hero { grid-template-columns: 1fr; text-align: center; }
  .score-ring { margin: 0 auto; }
  .result-actions { justify-content: center; }
  .result-stats { grid-template-columns: repeat(2, 1fr); }
  .review-heading { align-items: stretch; flex-direction: column; }
  .admin-layout { grid-template-columns: 1fr; }
  .admin-sidebar { position: static; }
  .admin-nav { grid-template-columns: repeat(3, 1fr); }
  .admin-nav button { justify-content: center; text-align: center; }
}

@media (max-width: 620px) {
  .header-inner { min-height: 64px; }
  .brand-copy small { display: none; }
  .hero-actions .button { width: 100%; }
  .trust-line { display: grid; gap: 9px; }
  .stats-card { grid-template-columns: 1fr; }
  .stat-item + .stat-item { border-left: 0; border-top: 1px solid var(--border); }
  .quiz-grid, .feature-grid { grid-template-columns: 1fr; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .quiz-intro-wrap { width: min(calc(100% - 22px), 850px); margin: 28px auto; }
  .intro-card-header { padding: 30px 22px 26px; }
  .intro-card-body { padding: 26px 22px 30px; }
  .intro-meta { grid-template-columns: 1fr; }
  .intro-meta-item + .intro-meta-item { border-left: 0; border-top: 1px solid var(--border); }
  .intro-actions .button { width: 100%; }
  .exam-topbar { top: 64px; }
  .exam-topbar-inner, .exam-layout { width: min(calc(100% - 20px), 1380px); }
  .exam-title-group span { max-width: 210px; }
  .question-card { padding: 24px 18px; border-radius: 16px; }
  .question-card-header { align-items: flex-start; flex-direction: column; }
  .mark-button { width: 100%; }
  .question-controls { align-items: stretch; flex-direction: column; }
  .question-controls-right { display: grid; grid-template-columns: 1fr 1fr; }
  .question-controls > .button { width: 100%; }
  .keyboard-hint { display: none; }
  .results-wrap { width: min(calc(100% - 20px), 1060px); margin-top: 28px; }
  .result-hero { padding: 26px 20px; }
  .result-stats { grid-template-columns: 1fr 1fr; }
  .review-card-header { align-items: flex-start; flex-direction: column; }
  .review-option-main { grid-template-columns: auto 1fr; }
  .review-badge { grid-column: 2; justify-self: start; }
  .option-explanation { padding-left: 14px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-field.full { grid-column: auto; }
  .admin-layout { width: min(calc(100% - 20px), 1420px); }
  .admin-nav { grid-template-columns: 1fr; }
  .admin-page-header { align-items: stretch; flex-direction: column; }
  .admin-stats { grid-template-columns: 1fr 1fr; }
  .admin-panel { padding: 18px; }
  .admin-question-row { grid-template-columns: 40px minmax(0, 1fr); }
  .admin-question-row .row-actions { grid-column: 1 / -1; }
  .option-editor-row { grid-template-columns: 38px 1fr; }
  .option-editor-row textarea:last-child { grid-column: 2; }
}

@media print {
  .site-header,
  .result-actions,
  .review-filters,
  .site-footer,
  .demo-banner {
    display: none !important;
  }
  body { background: var(--white); }
  .results-wrap { width: 100%; margin: 0; }
  .result-hero, .review-card, .result-stat { box-shadow: none; break-inside: avoid; }
  .review-card { margin-bottom: 14px; }
}

/* ========================================================================== */
/* Learn with Abe v2: private student portal, assignments, and tutor mode     */
/* ========================================================================== */

.header-user-name {
  max-width: 240px;
  overflow: hidden;
  color: var(--ink-700);
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.86rem;
  font-weight: 720;
}

.button-tutor {
  color: #075d68;
  border-color: #8bdde5;
  background: linear-gradient(135deg, #e9fbfd, var(--cyan-100));
  box-shadow: 0 8px 18px rgba(22, 182, 200, 0.12);
}

.button-tutor:hover:not(:disabled) {
  border-color: var(--cyan-500);
  background: #dff9fc;
}

.text-button {
  display: inline-flex;
  margin: 4px 0 14px;
  padding: 0;
  border: 0;
  color: var(--blue-700);
  background: transparent;
  cursor: pointer;
  font-size: 0.86rem;
  font-weight: 720;
}

.text-button:hover,
.text-button:focus-visible {
  text-decoration: underline;
}

.table-subtext,
.field-help,
.muted-copy,
.muted-count {
  color: var(--ink-500);
  font-size: 0.78rem;
}

.optional-label {
  color: var(--ink-400);
  font-size: 0.74rem;
  font-weight: 600;
}

.warning-text {
  color: var(--amber-700);
  font-size: 0.75rem;
  font-weight: 720;
}

/* Student authentication and dashboard */
.portal-loading-wrap {
  min-height: calc(100vh - 144px);
  display: grid;
  place-items: center;
  padding: 40px 20px;
}

.auth-landing {
  position: relative;
  min-height: calc(100vh - 145px);
  overflow: hidden;
  padding: 76px 0 84px;
  background:
    radial-gradient(circle at 12% 10%, rgba(22, 182, 200, 0.14), transparent 34%),
    radial-gradient(circle at 86% 8%, rgba(35, 100, 232, 0.13), transparent 33%),
    linear-gradient(180deg, #fff, #f6f8fb);
}

.auth-landing::after {
  content: "";
  position: absolute;
  right: -140px;
  bottom: -220px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: rgba(35, 100, 232, 0.04);
  pointer-events: none;
}

.auth-landing-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.72fr);
  align-items: center;
  gap: 70px;
}

.auth-landing-copy h1 {
  max-width: 760px;
  margin: 18px 0 20px;
  color: var(--ink-950);
  font-size: clamp(2.7rem, 6vw, 5.15rem);
  line-height: 0.99;
  letter-spacing: -0.06em;
}

.auth-landing-copy h1 span {
  color: var(--blue-600);
}

.auth-landing-copy > p {
  max-width: 680px;
  margin: 0;
  color: var(--ink-600);
  font-size: clamp(1.02rem, 1.7vw, 1.22rem);
}

.portal-feature-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 34px;
}

.portal-feature-list article {
  display: grid;
  gap: 6px;
  padding: 17px;
  border: 1px solid rgba(216, 224, 232, 0.9);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow-sm);
}

.portal-feature-list strong {
  color: var(--ink-900);
  font-size: 0.88rem;
}

.portal-feature-list span {
  color: var(--ink-500);
  font-size: 0.79rem;
  line-height: 1.48;
}

.student-login-card {
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(14px);
}

.student-login-card h2 {
  margin: 8px 0 7px;
  color: var(--ink-950);
  font-size: 1.85rem;
  letter-spacing: -0.04em;
}

.student-login-card > p {
  margin: 0 0 22px;
  color: var(--ink-500);
}

.login-help {
  margin: 15px 0 0 !important;
  color: var(--ink-400) !important;
  font-size: 0.78rem;
  text-align: center;
}

.student-dashboard {
  min-height: calc(100vh - 145px);
  padding: 46px 0 82px;
}

.student-welcome-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 28px 30px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(120deg, rgba(223, 234, 255, 0.5), rgba(217, 248, 251, 0.4)),
    var(--white);
  box-shadow: var(--shadow-md);
}

.student-profile-summary {
  display: flex;
  align-items: center;
  gap: 18px;
  min-width: 0;
}

.student-avatar,
.mini-avatar {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: var(--white);
  background: linear-gradient(145deg, var(--blue-600), var(--cyan-500));
  font-weight: 850;
  letter-spacing: -0.035em;
}

.student-avatar {
  width: 64px;
  height: 64px;
  border-radius: 19px;
  box-shadow: 0 12px 22px rgba(35, 100, 232, 0.19);
  font-size: 1.12rem;
}

.mini-avatar {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  font-size: 0.72rem;
}

.student-profile-summary h1 {
  margin: 4px 0 3px;
  color: var(--ink-950);
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.student-profile-summary p {
  margin: 0;
  overflow: hidden;
  color: var(--ink-500);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.student-welcome-copy {
  max-width: 390px;
  display: grid;
  gap: 4px;
  padding-left: 28px;
  border-left: 1px solid rgba(188, 198, 210, 0.8);
  color: var(--ink-500);
  font-size: 0.84rem;
}

.student-welcome-copy strong {
  color: var(--ink-800);
  font-size: 0.94rem;
}

.student-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 18px 0 48px;
}

.student-stat {
  padding: 19px 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.student-stat strong {
  display: block;
  color: var(--ink-950);
  font-size: 1.55rem;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.student-stat span {
  color: var(--ink-500);
  font-size: 0.76rem;
  font-weight: 650;
}

.student-section + .student-section {
  margin-top: 58px;
}

.student-section-header {
  margin-bottom: 22px;
}

.student-section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.4rem);
}

.student-section-header p {
  margin-top: 5px;
}

.assignment-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.assignment-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.assignment-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 320px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.assignment-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--ink-300);
}

.assignment-card.status-in_progress::before { background: var(--blue-600); }
.assignment-card.status-completed::before { background: var(--green-600); }
.assignment-card.status-overdue::before { background: var(--red-600); }
.assignment-card.status-upcoming::before { background: var(--amber-500); }

.assignment-card:hover {
  transform: translateY(-2px);
  border-color: #c8d5e2;
  box-shadow: var(--shadow-md);
}

.assignment-card-topline {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.assignment-badges,
.intro-mode-row,
.result-kicker-row,
.review-status-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
}

.mode-badge {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  border-radius: 999px;
  padding: 5px 9px;
  font-size: 0.7rem;
  font-weight: 790;
  white-space: nowrap;
}

.mode-test {
  color: var(--blue-700);
  background: var(--blue-100);
}

.mode-tutor {
  color: #07616c;
  background: var(--cyan-100);
}

.assignment-due {
  color: var(--ink-500);
  font-size: 0.76rem;
  font-weight: 650;
  text-align: right;
}

.assignment-card h3 {
  margin: 20px 0 8px;
  color: var(--ink-950);
  font-size: 1.35rem;
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.assignment-card > p {
  margin: 0;
  color: var(--ink-500);
  font-size: 0.88rem;
}

.student-note {
  margin-top: 15px;
  padding: 11px 12px;
  border: 1px solid #eed58b;
  border-radius: 10px;
  color: #684400;
  background: #fff9e8;
  font-size: 0.79rem;
}

.assignment-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  margin-top: 20px;
}

.assignment-meta-grid > div {
  min-width: 0;
  display: grid;
  gap: 2px;
  padding: 11px;
  border-radius: 10px;
  background: var(--ink-50);
}

.assignment-meta-grid strong {
  overflow: hidden;
  color: var(--ink-800);
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.81rem;
}

.assignment-meta-grid span {
  color: var(--ink-400);
  font-size: 0.7rem;
  font-weight: 650;
}

.assignment-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: auto;
  padding-top: 22px;
}

.assignment-disabled-note {
  color: var(--ink-400);
  font-size: 0.8rem;
}

.student-history-panel {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.student-history-panel .empty-panel {
  margin: 0;
  border: 0;
  border-radius: 0;
}

.status-not_started,
.status-unavailable { color: var(--ink-600); background: var(--ink-100); }
.status-in_progress,
.status-progress { color: var(--blue-700); background: var(--blue-100); }
.status-completed { color: var(--green-700); background: var(--green-100); }
.status-upcoming { color: var(--amber-700); background: var(--amber-100); }
.status-overdue { color: var(--red-700); background: var(--red-100); }

.dialog-card-small {
  width: min(calc(100% - 28px), 500px);
}

.dialog-intro {
  margin: 0 0 20px;
  color: var(--ink-500);
}

/* Assignment intro and exam mode */
.intro-card-v2 .intro-card-header {
  background:
    radial-gradient(circle at 90% 0, rgba(22, 182, 200, 0.17), transparent 35%),
    linear-gradient(135deg, #0b1728, #17365f);
}

.intro-mode-row {
  margin-bottom: 18px;
}

.intro-meta-v2 {
  grid-template-columns: repeat(4, 1fr);
}

.mode-explanation {
  margin-bottom: 22px;
  padding: 15px 16px;
  border: 1px solid #b7d8fb;
  border-radius: 12px;
  color: var(--ink-700);
  background: #f1f7ff;
  font-size: 0.87rem;
}

.intro-student-note {
  margin: 0 0 22px;
}

.exam-timer.is-untimed {
  color: var(--ink-600);
  border-color: var(--border);
  background: var(--white);
}

.exam-timer.is-warning {
  color: var(--amber-700);
  border-color: #efd273;
  background: var(--amber-100);
}

.exam-timer.is-critical {
  color: var(--red-700);
  border-color: #f4aab2;
  background: var(--red-100);
  animation: timer-pulse 1s ease-in-out infinite;
}

@keyframes timer-pulse {
  50% { transform: scale(1.035); }
}

.mark-button.is-marked {
  color: var(--amber-700);
  border-color: #efd273;
  background: var(--amber-100);
}

.answer-letter {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 9px;
  color: var(--ink-700);
  background: var(--ink-100);
  font-size: 0.8rem;
  font-weight: 820;
}

.answer-text {
  min-width: 0;
  padding-top: 3px;
  text-align: left;
}

.answer-option.is-selected .answer-letter {
  color: var(--white);
  background: var(--blue-600);
}

.answer-option:disabled {
  cursor: default;
  opacity: 1;
}

.answer-option.is-correct {
  color: var(--green-700);
  border-color: #84d0a4;
  background: #f2fbf6;
  box-shadow: none;
}

.answer-option.is-correct .answer-letter {
  color: var(--white);
  background: var(--green-600);
}

.answer-option.is-incorrect {
  color: var(--red-700);
  border-color: #eea3ab;
  background: #fff5f6;
  box-shadow: none;
}

.answer-option.is-incorrect .answer-letter {
  color: var(--white);
  background: var(--red-600);
}

.answer-state-label {
  grid-column: 2;
  justify-self: start;
  margin-top: 5px;
  border-radius: 999px;
  padding: 3px 7px;
  color: inherit;
  background: rgba(255, 255, 255, 0.78);
  font-size: 0.67rem;
  font-weight: 790;
}

.palette-button.is-tutor-checked::before {
  content: "✓";
  position: absolute;
  left: 3px;
  bottom: 1px;
  color: var(--green-700);
  font-size: 0.56rem;
  font-weight: 900;
}

.legend-dot.tutor-checked {
  border-color: #8cd4aa;
  background: var(--green-100);
}

.tutor-feedback-panel {
  margin-top: 24px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 15px;
  background: var(--ink-50);
}

.tutor-feedback-panel.is-correct { border-top: 4px solid var(--green-600); }
.tutor-feedback-panel.is-incorrect { border-top: 4px solid var(--red-600); }

.tutor-feedback-heading {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--white);
}

.feedback-result-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 50%;
  color: var(--white);
  background: var(--green-600);
  font-size: 1.35rem;
  font-weight: 900;
}

.is-incorrect .feedback-result-icon { background: var(--red-600); }

.tutor-feedback-heading strong {
  color: var(--ink-950);
  font-size: 1.12rem;
}

.tutor-feedback-heading p {
  margin: 2px 0 0;
  color: var(--ink-500);
  font-size: 0.84rem;
}

.feedback-section {
  padding: 18px 20px;
}

.feedback-section + .feedback-section {
  border-top: 1px solid var(--border);
}

.feedback-section h3 {
  margin: 0 0 10px;
  color: var(--ink-900);
  font-size: 0.9rem;
}

.feedback-choice-breakdown {
  display: grid;
  gap: 9px;
}

.feedback-choice-breakdown h3 {
  margin-bottom: 2px;
}

.feedback-choice {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 11px;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--white);
}

.feedback-choice.is-correct {
  border-color: #9adbb5;
  background: #f4fcf7;
}

.feedback-choice.is-selected:not(.is-correct) {
  border-color: #efafb6;
  background: #fff7f8;
}

.feedback-choice-letter {
  width: 25px;
  height: 25px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  color: var(--ink-700);
  background: var(--ink-100);
  font-size: 0.72rem;
  font-weight: 820;
}

.feedback-choice strong {
  color: var(--ink-800);
  font-size: 0.84rem;
}

.feedback-choice p {
  margin: 3px 0 0;
  color: var(--ink-500);
  font-size: 0.78rem;
}

.tutor-feedback-panel > .teaching-point,
.tutor-feedback-panel > .reference-line {
  margin: 0;
  border-radius: 0;
  padding: 18px 20px;
  border-top: 1px solid var(--border);
}

.reference-line {
  color: var(--ink-500);
  font-size: 0.78rem;
}

.result-kicker-row {
  margin-bottom: 7px;
}

.score-ring.is-passed {
  background: conic-gradient(var(--green-600) var(--score-angle), var(--ink-100) 0);
}

.score-ring.is-not-passed {
  background: conic-gradient(var(--blue-600) var(--score-angle), var(--ink-100) 0);
}

.review-status-group {
  justify-content: flex-end;
}

.review-card > .question-prompt {
  padding: 23px 24px 8px;
  font-size: 1.02rem;
}

.review-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 13px 14px;
}

.review-option.is-incorrect {
  border-color: #f0a6ae;
  background: #fff7f8;
}

.review-option-copy {
  display: grid;
  min-width: 0;
}

.review-option-copy strong {
  color: var(--ink-800);
  font-size: 0.88rem;
}

.review-option-copy p {
  margin-top: 6px;
  color: var(--ink-500);
  font-size: 0.8rem;
}

.review-option-label {
  justify-self: start;
  margin-top: 5px;
  border-radius: 999px;
  padding: 3px 7px;
  color: inherit;
  background: rgba(255, 255, 255, 0.88);
  font-size: 0.67rem;
  font-weight: 780;
}

.review-explanation {
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  background: #f7faff;
}

.review-explanation h3 {
  margin: 0 0 9px;
  color: var(--blue-700);
  font-size: 0.9rem;
}

.review-card > .teaching-point,
.review-card > .reference-line {
  margin: 0;
  padding: 18px 24px;
  border-top: 1px solid var(--border);
  border-radius: 0;
}

body.palette-open .exam-sidebar {
  transform: translateX(0);
}

body.palette-open::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 190;
  background: rgba(7, 17, 31, 0.42);
}

/* Administrator v2 */
.admin-nav button span {
  width: 20px;
  color: var(--ink-400);
  text-align: center;
}

.admin-nav button.is-active span {
  color: currentColor;
}

.admin-stats-v2 {
  grid-template-columns: repeat(5, 1fr);
}

.compact-admin-stats {
  grid-template-columns: repeat(4, 1fr);
}

.admin-panel-header > div > p,
.admin-panel-header > p {
  margin: 4px 0 0;
  color: var(--ink-500);
  font-size: 0.82rem;
}

.form-actions,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.inline-actions {
  margin-top: 14px;
}

.import-dropzone p {
  margin: 7px 0 14px;
  color: var(--ink-500);
  font-size: 0.84rem;
}

.import-text-wrap {
  margin-top: 16px;
}

.import-sample-list {
  display: grid;
  gap: 4px;
  margin-top: 10px;
  color: var(--ink-600);
  font-size: 0.82rem;
}

.compact-search {
  width: min(240px, 100%);
  min-height: 38px;
}

.compact-select {
  width: auto;
  min-width: 135px;
  min-height: 38px;
}

.admin-filter-header {
  align-items: flex-end;
}

.filter-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
}

.compact-check {
  min-height: 38px;
  margin: 0;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--white);
  white-space: nowrap;
}

.person-cell {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 190px;
}

.person-cell > div {
  display: grid;
  min-width: 0;
}

.person-cell strong,
.person-cell span:not(.mini-avatar) {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.person-cell span:not(.mini-avatar) {
  color: var(--ink-500);
  font-size: 0.76rem;
}

.dialog-card-wide {
  width: min(calc(100% - 28px), 920px);
}

.dialog-header > div > p {
  margin: 3px 0 0;
  color: var(--ink-500);
  font-size: 0.8rem;
}

.radio-card {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  margin-top: 9px;
  padding: 13px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--white);
  cursor: pointer;
}

.radio-card:has(input:checked) {
  border-color: var(--blue-500);
  background: #f4f8ff;
  box-shadow: 0 0 0 3px rgba(61, 124, 242, 0.08);
}

.radio-card input {
  margin-top: 4px;
}

.radio-card span {
  display: grid;
  gap: 3px;
}

.radio-card strong {
  color: var(--ink-800);
  font-size: 0.88rem;
}

.radio-card small {
  color: var(--ink-500);
  font-size: 0.76rem;
  line-height: 1.45;
}

.assignment-mode-picker {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.mode-radio {
  margin: 0;
  min-height: 88px;
}

.assignment-timed-row {
  min-height: 44px;
  margin: 0;
}

.setup-command-panel pre {
  overflow: auto;
  margin: 16px 0;
  padding: 18px;
  border-radius: 12px;
  color: #e7f0ff;
  background: var(--ink-950);
  font-size: 0.82rem;
  line-height: 1.7;
}

.setup-command-panel p,
.workflow-list {
  color: var(--ink-600);
  line-height: 1.75;
}

.workflow-list {
  padding-left: 22px;
}

@media (max-width: 1120px) {
  .auth-landing-grid { gap: 42px; }
  .portal-feature-list { grid-template-columns: 1fr; }
  .admin-stats-v2 { grid-template-columns: repeat(3, 1fr); }
  .filter-controls { justify-content: flex-start; }
  .admin-filter-header { align-items: stretch; flex-direction: column; }
}

@media (max-width: 900px) {
  .auth-landing-grid { grid-template-columns: 1fr; }
  .auth-landing-copy { text-align: left; }
  .student-login-card { width: min(100%, 560px); }
  .student-welcome-card { align-items: flex-start; flex-direction: column; }
  .student-welcome-copy { max-width: none; padding: 0; border-left: 0; }
  .student-stats { grid-template-columns: repeat(2, 1fr); }
  .assignment-grid { grid-template-columns: 1fr; }
  .intro-meta-v2 { grid-template-columns: repeat(2, 1fr); }
  .intro-meta-v2 .intro-meta-item:nth-child(3) { border-left: 0; border-top: 1px solid var(--border); }
  .intro-meta-v2 .intro-meta-item:nth-child(4) { border-top: 1px solid var(--border); }
  .compact-admin-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 800px) {
  .admin-nav { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .admin-nav button { gap: 4px; padding: 10px 5px; font-size: 0.73rem; }
  .admin-nav button span { display: none; }
}

@media (max-width: 650px) {
  .auth-landing { padding: 52px 0 62px; }
  .auth-landing-copy h1 { font-size: clamp(2.45rem, 13vw, 4rem); }
  .student-login-card { padding: 24px 20px; }
  .student-dashboard { padding-top: 28px; }
  .student-welcome-card { padding: 22px 18px; }
  .student-profile-summary { align-items: flex-start; }
  .student-avatar { width: 52px; height: 52px; border-radius: 15px; }
  .student-profile-summary p { white-space: normal; }
  .student-stats { grid-template-columns: 1fr 1fr; }
  .assignment-card { padding: 21px 18px; }
  .assignment-card-topline { align-items: flex-start; flex-direction: column; }
  .assignment-due { text-align: left; }
  .assignment-meta-grid { grid-template-columns: 1fr; }
  .assignment-card-actions { display: grid; }
  .assignment-card-actions .button { width: 100%; }
  .intro-meta-v2 { grid-template-columns: 1fr; }
  .intro-meta-v2 .intro-meta-item + .intro-meta-item { border-left: 0; border-top: 1px solid var(--border); }
  .question-controls-right { grid-template-columns: 1fr; }
  .tutor-feedback-heading { align-items: flex-start; }
  .review-option { grid-template-columns: auto minmax(0, 1fr); }
  .admin-stats-v2,
  .compact-admin-stats { grid-template-columns: 1fr 1fr; }
  .filter-controls { display: grid; grid-template-columns: 1fr; }
  .compact-search,
  .compact-select,
  .filter-controls .button { width: 100%; }
  .assignment-mode-picker { grid-template-columns: 1fr; }
  .dialog-footer { flex-wrap: wrap; }
  .dialog-footer .button { flex: 1 1 auto; }
}

@media (max-width: 460px) {
  .header-nav { gap: 8px; }
  .header-user-name,
  .header-nav #change-password-button { display: none !important; }
  .student-stats,
  .admin-stats-v2,
  .compact-admin-stats { grid-template-columns: 1fr; }
  .student-profile-summary { gap: 12px; }
  .student-avatar { display: none; }
  .admin-nav { grid-template-columns: repeat(3, 1fr); }
}