:root {
  color-scheme: dark;
  --bg: #000000;
  --bg-raised: #050505;
  --panel: #090909;
  --panel-strong: #101010;
  --panel-soft: #171717;
  --text: #fffafb;
  --text-soft: #ded5da;
  --text-muted: #a89da4;
  --line: #2c2930;
  --line-bright: #514956;
  --pink: #ff4fa3;
  --pink-bright: #ff91c4;
  --pink-soft: #391126;
  --pink-wash: rgba(255, 79, 163, 0.13);
  --cyan: #21d7ff;
  --yellow: #ffe45c;
  --purple: #a875ff;
  --green: #58f59a;
  --green-soft: #0c3620;
  --orange: #ff923f;
  --amber: #ffd166;
  --red: #ff6f85;
  --sidebar-width: 292px;
  --content-max: 920px;
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  overflow-x: hidden;
  background-color: #000;
  background-image:
    linear-gradient(rgba(255, 79, 163, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(33, 215, 255, 0.018) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--text);
}

body.is-locked {
  overflow: hidden;
  touch-action: none;
}

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

button {
  color: inherit;
  touch-action: manipulation;
}

button,
[role="button"] {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 3px solid var(--pink-bright);
  outline-offset: 3px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

svg {
  display: block;
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: 8px;
  left: 8px;
  transform: translateY(-160%);
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--text);
  color: var(--bg);
  font-weight: 800;
  text-decoration: none;
}

.skip-link:focus {
  transform: none;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.app-shell {
  min-height: 100vh;
  min-height: 100dvh;
}

.sidebar {
  position: fixed;
  z-index: 70;
  inset: 0 auto 0 0;
  width: min(88vw, var(--sidebar-width));
  height: 100vh;
  height: 100dvh;
  padding: calc(18px + var(--safe-top)) 14px calc(20px + var(--safe-bottom));
  overflow-y: auto;
  overscroll-behavior: contain;
  background: rgba(0, 0, 0, 0.985);
  border-right: 1px solid var(--line);
  box-shadow: var(--shadow);
  transform: translateX(-105%);
  transition: transform 220ms ease;
}

.sidebar.is-open {
  transform: translateX(0);
}

.drawer-scrim {
  position: fixed;
  z-index: 60;
  inset: 0;
  background: rgba(0, 0, 0, 0.68);
  backdrop-filter: blur(3px);
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}

.brand {
  display: flex;
  flex: 1;
  min-width: 0;
  align-items: center;
  gap: 11px;
  padding: 4px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.brand-mark {
  display: grid;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 118, 173, 0.34);
  border-radius: 13px;
  background: var(--pink-soft);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.025);
}

.brand-mark img {
  width: 38px;
  height: 38px;
  object-fit: contain;
  image-rendering: auto;
}

.brand strong,
.brand small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand strong {
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.brand small {
  margin-top: 3px;
  color: var(--text-muted);
  font-size: 0.71rem;
}

.icon-button {
  display: inline-grid;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  padding: 0;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 12px;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
}

.icon-button:hover {
  border-color: var(--line);
  background: var(--panel-strong);
  color: var(--text);
}

.nav-link,
.section-link,
.module-heading {
  width: 100%;
  min-height: 44px;
  border: 0;
  cursor: pointer;
  text-align: left;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 10px 12px;
  border-radius: 12px;
  background: transparent;
  color: var(--text-soft);
  font-weight: 700;
}

.nav-link:hover,
.nav-link.is-active {
  background: var(--pink-wash);
  color: var(--text);
}

.nav-link.is-active {
  box-shadow: inset 3px 0 0 var(--pink);
}

.nav-icon {
  display: grid;
  width: 26px;
  place-items: center;
  color: var(--pink);
}

.course-progress-card {
  margin: 14px 2px 18px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(140deg, rgba(255, 118, 173, 0.08), transparent 70%), var(--panel);
}

.course-progress-card > div:first-child {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-soft);
  font-size: 0.76rem;
  font-weight: 700;
}

.course-progress-card strong {
  color: var(--pink-bright);
  font-size: 0.82rem;
}

.mini-progress {
  height: 5px;
  margin-top: 10px;
  overflow: hidden;
  border-radius: 99px;
  background: #2a2227;
}

.mini-progress span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--pink), var(--pink-bright));
  transition: width 300ms ease;
}

.module-group + .module-group {
  margin-top: 8px;
}

.module-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 10px;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  font-size: 0.79rem;
  font-weight: 850;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.module-heading:hover {
  background: var(--panel);
}

.module-heading svg {
  width: 16px;
  height: 16px;
  transition: transform 160ms ease;
}

.module-heading[aria-expanded="false"] svg {
  transform: rotate(-90deg);
}

.module-list {
  display: grid;
  gap: 3px;
  padding-bottom: 8px;
}

.module-list[hidden] {
  display: none;
}

.section-link {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  background: transparent;
  color: var(--text-soft);
  font-size: 0.78rem;
  line-height: 1.25;
}

.section-link:hover,
.section-link.is-active {
  background: var(--panel-strong);
  color: var(--text);
}

.section-link.is-active {
  box-shadow: inset 2px 0 0 var(--pink);
}

.section-number {
  color: var(--pink-bright);
  font-size: 0.7rem;
  font-weight: 850;
}

.status-dot {
  display: grid;
  width: 20px;
  height: 20px;
  place-items: center;
  border: 1px solid var(--line-bright);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.64rem;
  font-weight: 900;
}

.status-dot.learning {
  border-color: rgba(244, 195, 107, 0.42);
  background: rgba(244, 195, 107, 0.1);
  color: var(--amber);
}

.status-dot.mastered {
  border-color: rgba(110, 231, 168, 0.44);
  background: var(--green-soft);
  color: var(--green);
}

.soon-badge {
  padding: 3px 6px;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: var(--text-muted);
  font-size: 0.58rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.sidebar-footer {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.quiet-button {
  display: flex;
  min-height: 44px;
  align-items: center;
  gap: 9px;
  padding: 8px 10px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
}

.quiet-button:hover {
  background: var(--panel);
  color: var(--text-soft);
}

.quiet-button svg {
  width: 17px;
  height: 17px;
}

.sidebar-footer p {
  margin: 4px 10px 0;
  color: #9a8f96;
  font-size: 0.64rem;
}

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

.mobile-header {
  position: sticky;
  z-index: 45;
  top: 0;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 48px;
  align-items: center;
  height: calc(60px + var(--safe-top));
  padding: var(--safe-top) max(8px, var(--safe-right)) 0 max(8px, var(--safe-left));
  border-bottom: 1px solid rgba(43, 36, 41, 0.92);
  background: rgba(0, 0, 0, 0.94);
  backdrop-filter: blur(18px);
}

.mobile-title {
  display: flex;
  min-width: 0;
  height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  background: transparent;
  font-weight: 800;
  cursor: pointer;
}

.mobile-title img {
  width: 30px;
  height: 30px;
  object-fit: contain;
  image-rendering: auto;
}

.mobile-title span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mobile-goal {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--pink-bright);
  font-size: 0.68rem;
  font-weight: 900;
  cursor: pointer;
}

main {
  min-height: calc(100vh - 60px);
  min-height: calc(100dvh - 60px);
  padding: 28px max(16px, var(--safe-right)) calc(120px + var(--safe-bottom)) max(16px, var(--safe-left));
}

.view {
  width: min(100%, var(--content-max));
  margin: 0 auto;
}

.eyebrow {
  display: block;
  margin-bottom: 7px;
  color: var(--pink-bright);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.095em;
  text-transform: uppercase;
}

.page-title {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2rem, 7vw, 4.3rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.page-lede {
  max-width: 690px;
  margin: 18px 0 0;
  color: var(--text-soft);
  font-size: clamp(1rem, 2.5vw, 1.18rem);
  line-height: 1.6;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 6vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(255, 118, 173, 0.13), transparent 44%),
    var(--panel);
}

.hero::after {
  position: absolute;
  right: -36px;
  bottom: -46px;
  width: 190px;
  height: 190px;
  border: 1px solid rgba(255, 118, 173, 0.12);
  border-radius: 42px;
  box-shadow: 0 0 80px rgba(255, 118, 173, 0.09);
  content: "";
  transform: rotate(18deg);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.module-mascot {
  display: block;
  flex: 0 0 auto;
  width: 78px;
  aspect-ratio: 1;
  background-image: url("assets/module-mascots-v2.png");
  background-repeat: no-repeat;
  background-size: 200% 200%;
  filter: drop-shadow(0 5px 0 rgba(0, 0, 0, 0.52));
}

.module-mascot[data-mascot="1"] { background-position: 0 0; }
.module-mascot[data-mascot="2"] { background-position: 100% 0; }
.module-mascot[data-mascot="3"] { background-position: 0 100%; }
.module-mascot[data-mascot="4"] { background-position: 100% 100%; }

.hero-mascot-party {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: min(100%, 350px);
  margin: 24px auto -8px;
}

.hero-mascot-party .module-mascot {
  width: 100%;
  transition: transform 180ms ease;
}

.hero-mascot-party .module-mascot:nth-child(odd) { transform: rotate(-4deg); }
.hero-mascot-party .module-mascot:nth-child(even) { transform: rotate(4deg) translateY(6px); }

.hero-actions,
.section-actions,
.question-footer,
.calc-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-actions {
  margin-top: 25px;
}

.primary-button,
.secondary-button,
.primary-small,
.secondary-small {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 12px;
  font-weight: 850;
  cursor: pointer;
}

.primary-button,
.secondary-button {
  padding: 12px 17px;
}

.primary-small,
.secondary-small {
  padding: 9px 13px;
  font-size: 0.78rem;
}

.primary-button,
.primary-small {
  border: 1px solid var(--pink);
  background: var(--pink);
  color: #170910;
  box-shadow: 0 8px 28px rgba(255, 118, 173, 0.18);
}

.primary-button:hover,
.primary-small:hover {
  background: var(--pink-bright);
}

.secondary-button,
.secondary-small {
  border: 1px solid var(--line-bright);
  background: var(--panel-strong);
  color: var(--text);
}

.secondary-button:hover,
.secondary-small:hover {
  border-color: rgba(255, 118, 173, 0.42);
  background: var(--pink-wash);
}

.full-width {
  width: 100%;
}

.dashboard-grid {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.dashboard-card,
.section-overview-card,
.coming-soon-card,
.mastery-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.dashboard-card {
  padding: 20px;
}

.dashboard-card h2,
.module-list-heading h2,
.section-header h1,
.coming-soon-card h1 {
  margin: 0;
  letter-spacing: -0.035em;
}

.dashboard-card h2 {
  font-size: 1rem;
}

.daily-card {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  align-items: center;
  gap: 18px;
}

.progress-ring {
  --progress: 0;
  position: relative;
  display: grid;
  width: 82px;
  height: 82px;
  place-items: center;
  border-radius: 50%;
  background: conic-gradient(var(--pink) calc(var(--progress) * 1%), #2a2227 0);
}

.progress-ring::before {
  position: absolute;
  width: 66px;
  height: 66px;
  border-radius: 50%;
  background: var(--panel);
  content: "";
}

.progress-ring strong {
  position: relative;
  z-index: 1;
  font-size: 0.87rem;
}

.card-kicker {
  margin: 0 0 6px;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.card-copy {
  margin: 7px 0 0;
  color: var(--text-soft);
  font-size: 0.84rem;
  line-height: 1.5;
}

.goal-select-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.goal-select-row select {
  min-height: 44px;
  padding: 6px 30px 6px 10px;
  border: 1px solid var(--line-bright);
  border-radius: 9px;
  background: var(--panel-strong);
  color: var(--text);
  font-size: 16px;
}

.mastery-number {
  margin-top: 14px;
  color: var(--pink-bright);
  font-size: clamp(2rem, 10vw, 3.6rem);
  font-weight: 900;
  letter-spacing: -0.06em;
}

.mastery-bar {
  height: 8px;
  margin-top: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: #2a2227;
}

.mastery-bar span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--pink), var(--green));
}

.cat-note {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, var(--panel-strong), var(--panel));
}

.cat-note::after {
  position: absolute;
  right: 14px;
  bottom: -4px;
  color: rgba(255, 118, 173, 0.08);
  content: "=^.^=";
  font-family: ui-monospace, monospace;
  font-size: 3.2rem;
  font-weight: 900;
  transform: rotate(-5deg);
}

.module-list-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin: 34px 2px 14px;
}

.module-list-heading h2 {
  font-size: 1.25rem;
}

.module-list-heading span {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.section-card-list {
  display: grid;
  gap: 9px;
}

.section-overview-card {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  align-items: center;
  gap: 13px;
  width: 100%;
  min-height: 76px;
  padding: 13px 15px;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.section-overview-card:hover {
  border-color: rgba(255, 118, 173, 0.38);
  background: var(--panel-strong);
}

.section-overview-card .section-number-box {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid var(--line-bright);
  border-radius: 13px;
  color: var(--pink-bright);
  font-size: 0.76rem;
  font-weight: 900;
}

.section-overview-card h3 {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.25;
}

.section-overview-card p {
  margin: 5px 0 0;
  color: var(--text-muted);
  font-size: 0.71rem;
}

.section-overview-card .arrow {
  color: var(--text-muted);
}

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

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  margin-bottom: 12px;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 750;
}

.breadcrumb button {
  padding: 4px 0;
  border: 0;
  background: transparent;
  color: var(--pink-bright);
  cursor: pointer;
}

.section-header h1,
.coming-soon-card h1 {
  font-size: clamp(1.8rem, 6vw, 3.15rem);
  line-height: 1.04;
}

.section-summary {
  max-width: 720px;
  margin: 13px 0 0;
  color: var(--text-soft);
  font-size: 0.96rem;
  line-height: 1.55;
}

.section-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 15px;
}

.pill {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text-soft);
  font-size: 0.7rem;
  font-weight: 750;
}

.pill.mastered {
  border-color: rgba(110, 231, 168, 0.35);
  background: var(--green-soft);
  color: var(--green);
}

.question-stack {
  display: grid;
  gap: 16px;
}

.question-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
}

.question-card.is-mastered {
  border-color: rgba(110, 231, 168, 0.26);
}

.question-card.is-learning {
  border-color: rgba(244, 195, 107, 0.28);
}

.question-card-inner {
  padding: clamp(18px, 5vw, 28px);
}

.question-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 17px;
}

.question-count {
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.065em;
  text-transform: uppercase;
}

.question-state {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.65rem;
  font-weight: 850;
}

.question-state.learning {
  border-color: rgba(244, 195, 107, 0.3);
  color: var(--amber);
}

.question-state.mastered {
  border-color: rgba(110, 231, 168, 0.32);
  color: var(--green);
}

.question-prompt {
  margin: 0;
  font-size: clamp(1.03rem, 3.5vw, 1.23rem);
  line-height: 1.5;
  letter-spacing: -0.015em;
}

.data-table {
  width: 100%;
  margin: 17px 0 0;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 10px;
  font-size: 0.83rem;
}

.data-table th,
.data-table td {
  padding: 9px 10px;
  border: 1px solid var(--line);
  text-align: center;
}

.data-table th {
  background: var(--panel-strong);
  color: var(--text-soft);
}

.stem-display,
.formula-display {
  margin: 16px 0 0;
  padding: 13px 15px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #0b090b;
  color: var(--pink-bright);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.89rem;
  white-space: pre-wrap;
}

.choice-list {
  display: grid;
  gap: 9px;
  margin: 20px 0 0;
  padding: 0;
  border: 0;
}

.choice {
  position: relative;
  display: grid;
  grid-template-columns: 35px minmax(0, 1fr);
  min-height: 52px;
  align-items: center;
  gap: 11px;
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--bg-raised);
  cursor: pointer;
}

.choice:hover {
  border-color: var(--line-bright);
  background: var(--panel-strong);
}

.choice:has(input:checked) {
  border-color: var(--pink);
  background: var(--pink-wash);
  box-shadow: 0 0 0 1px rgba(255, 118, 173, 0.12);
}

.choice:has(input:focus-visible) {
  outline: 3px solid var(--pink-bright);
  outline-offset: 3px;
}

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

.choice-letter {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--line-bright);
  border-radius: 10px;
  color: var(--text-soft);
  font-size: 0.72rem;
  font-weight: 900;
}

.choice-copy {
  display: grid;
  gap: 5px;
}

.choice-result-tag {
  width: fit-content;
  padding: 3px 7px;
  border: 1px solid currentColor;
  border-radius: 5px;
  color: var(--text-soft);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.61rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.choice.is-correct-answer .choice-result-tag {
  color: var(--green);
}

.choice.was-selected.is-wrong .choice-result-tag {
  color: var(--red);
}

.choice:has(input:checked) .choice-letter {
  border-color: var(--pink);
  background: var(--pink);
  color: #160910;
}

.choice.was-selected.is-wrong {
  border-color: rgba(255, 141, 157, 0.58);
  background: rgba(255, 141, 157, 0.08);
}

.choice.is-correct-answer {
  border-color: rgba(110, 231, 168, 0.5);
  background: rgba(110, 231, 168, 0.07);
}

.question-footer {
  align-items: center;
  justify-content: space-between;
  margin-top: 19px;
}

.calculator-tip-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 7px;
  padding: 9px 11px;
  border: 0;
  background: transparent;
  color: var(--pink-bright);
  font-size: 0.74rem;
  font-weight: 800;
  cursor: pointer;
}

.calculator-tip-button svg {
  width: 17px;
  height: 17px;
}

.feedback-panel {
  padding: 18px clamp(18px, 5vw, 28px) 21px;
  border-top: 1px solid var(--line);
  background: #0d0b0d;
}

.feedback-panel.correct {
  border-top-color: rgba(110, 231, 168, 0.24);
  background: linear-gradient(130deg, rgba(110, 231, 168, 0.07), transparent 55%), #0d0b0d;
}

.feedback-panel.wrong {
  border-top-color: rgba(255, 141, 157, 0.24);
  background: linear-gradient(130deg, rgba(255, 141, 157, 0.07), transparent 55%), #0d0b0d;
}

.feedback-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 8px;
  font-size: 0.98rem;
}

.feedback-title.correct {
  color: var(--green);
}

.feedback-title.wrong {
  color: var(--red);
}

.feedback-panel p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.87rem;
  line-height: 1.58;
}

.feedback-panel .tip-box {
  margin-top: 12px;
  padding: 11px 12px;
  border: 1px solid rgba(255, 118, 173, 0.22);
  border-radius: 10px;
  background: var(--pink-wash);
  color: var(--text-soft);
  font-size: 0.76rem;
  line-height: 1.5;
}

.feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 15px;
}

.mastery-card {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
  padding: 18px;
  border-color: rgba(110, 231, 168, 0.32);
  background: linear-gradient(135deg, rgba(110, 231, 168, 0.08), transparent 60%), var(--panel);
}

.mastery-card img {
  width: 48px;
  image-rendering: pixelated;
}

.mastery-card h2 {
  margin: 0;
  color: var(--green);
  font-size: 1.02rem;
}

.mastery-card p {
  margin: 5px 0 0;
  color: var(--text-soft);
  font-size: 0.8rem;
}

.section-actions {
  justify-content: space-between;
  margin-top: 22px;
}

.coming-soon-card {
  position: relative;
  overflow: hidden;
  padding: clamp(25px, 7vw, 52px);
}

.coming-soon-card::after {
  position: absolute;
  right: -24px;
  bottom: -28px;
  width: 150px;
  height: 150px;
  background: url("assets/black-hat-icon-v3.png") center / contain no-repeat;
  content: "";
  image-rendering: auto;
  opacity: 0.07;
  transform: rotate(-8deg);
}

.coming-soon-card p {
  position: relative;
  z-index: 1;
  max-width: 620px;
  margin: 15px 0 0;
  color: var(--text-soft);
  line-height: 1.6;
}

.calculator-fab {
  position: fixed;
  z-index: 52;
  right: max(16px, var(--safe-right));
  bottom: max(18px, calc(12px + var(--safe-bottom)));
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  gap: 9px;
  padding: 10px 15px;
  border: 1px solid rgba(255, 118, 173, 0.44);
  border-radius: 15px;
  background: #24131b;
  color: var(--pink-bright);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.5);
  font-size: 0.78rem;
  font-weight: 900;
  cursor: pointer;
}

.calculator-fab:hover {
  background: var(--pink-soft);
}

.calculator-fab svg {
  width: 20px;
  height: 20px;
}

.calculator {
  position: fixed;
  z-index: 85;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  max-height: min(78vh, 720px);
  max-height: min(78dvh, 720px);
  flex-direction: column;
  padding-bottom: var(--safe-bottom);
  overflow: hidden;
  border: 1px solid var(--line-bright);
  border-bottom: 0;
  border-radius: 22px 22px 0 0;
  background: rgba(18, 16, 18, 0.985);
  box-shadow: 0 -25px 80px rgba(0, 0, 0, 0.62);
  transform: translateY(103%);
  transition: transform 230ms ease;
}

.calculator[hidden] {
  display: none;
}

.calculator.is-open {
  transform: translateY(0);
}

.calculator-handle {
  width: 40px;
  height: 4px;
  margin: 9px auto 1px;
  border-radius: 99px;
  background: var(--line-bright);
}

.calculator-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
}

.calculator-header .eyebrow {
  margin-bottom: 2px;
  font-size: 0.57rem;
}

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

.calculator-window-actions {
  display: flex;
  gap: 2px;
}

.calculator-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  margin: 0 13px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0c0a0c;
}

.calculator-tab {
  min-height: 40px;
  padding: 7px 6px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 850;
  cursor: pointer;
}

.calculator-tab.is-active {
  background: var(--pink-soft);
  color: var(--pink-bright);
}

.calculator-body {
  min-height: 0;
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 13px;
}

.calc-panel {
  min-height: 100%;
}

.calc-panel[hidden] {
  display: none;
}

.calc-display {
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: #080708;
  text-align: right;
}

.calc-display input {
  width: 100%;
  min-height: 29px;
  padding: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text-soft);
  font-size: 16px;
  text-align: right;
}

.calc-display output {
  display: block;
  min-height: 29px;
  margin-top: 3px;
  overflow-x: auto;
  color: var(--pink-bright);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 1.25rem;
  font-weight: 800;
  white-space: nowrap;
}

.calculator-keys {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 7px;
  margin-top: 10px;
}

.key {
  min-width: 0;
  min-height: 45px;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--panel-strong);
  font-size: 0.86rem;
  font-weight: 850;
  cursor: pointer;
}

.key:hover {
  border-color: var(--line-bright);
  background: var(--panel-soft);
}

.key-soft {
  color: var(--text-soft);
}

.key-function {
  color: var(--pink-bright);
}

.key-operation {
  background: #28151e;
  color: var(--pink-bright);
}

.key-equals {
  border-color: var(--pink);
  background: var(--pink);
  color: #160910;
}

.calc-helper {
  margin: 10px 2px 0;
  color: var(--text-muted);
  font-size: 0.68rem;
  line-height: 1.45;
}

.calc-helper code {
  color: var(--pink-bright);
}

.field-label,
.field-grid label {
  color: var(--text-soft);
  font-size: 0.7rem;
  font-weight: 800;
}

.calc-panel textarea,
.field-grid input,
.field-grid select {
  width: 100%;
  margin-top: 7px;
  padding: 11px 12px;
  border: 1px solid var(--line-bright);
  border-radius: 11px;
  outline: 0;
  background: #090809;
  color: var(--text);
  font-size: 16px;
}

.calc-panel textarea {
  display: block;
  min-height: 86px;
  resize: vertical;
  line-height: 1.45;
}

.optional-frequency-label {
  display: block;
  margin-top: 12px;
}

#stats-frequencies {
  min-height: 62px;
}

.calc-panel textarea:focus,
.field-grid input:focus,
.field-grid select:focus {
  border-color: var(--pink);
}

.calc-action-row {
  margin-top: 10px;
}

.stats-output {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
  margin-top: 13px;
}

.stats-output > div {
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0b090b;
}

.stats-output span,
.stats-output strong {
  display: block;
}

.stats-output span {
  color: var(--text-muted);
  font-size: 0.62rem;
  font-weight: 750;
}

.stats-output strong {
  margin-top: 5px;
  overflow: hidden;
  color: var(--pink-bright);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.82rem;
  text-overflow: ellipsis;
}

.regression-tool {
  margin-top: 10px;
  padding: 0 11px 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0b090b;
}

.regression-tool summary {
  min-height: 44px;
  margin: 0 -11px 10px;
  padding: 12px 13px;
  color: var(--text-soft);
  font-size: 0.73rem;
  font-weight: 850;
  cursor: pointer;
}

.regression-tool[open] summary {
  border-bottom: 1px solid var(--line);
}

.regression-tool textarea {
  min-height: 62px;
  margin: 6px 0 10px;
}

.regression-tool .field-label {
  display: block;
  margin-top: 8px;
}

.regression-tool .full-width {
  margin-top: 2px;
}

.probability-tools {
  display: grid;
  gap: 8px;
}

.probability-tools details {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0b090b;
}

.probability-tools summary {
  min-height: 44px;
  padding: 12px 13px;
  color: var(--text-soft);
  font-size: 0.73rem;
  font-weight: 850;
  cursor: pointer;
}

.probability-tools details[open] {
  padding-bottom: 12px;
}

.probability-tools details[open] summary {
  margin-bottom: 1px;
  border-bottom: 1px solid var(--line);
}

.field-grid {
  display: grid;
  gap: 9px;
  padding: 11px 11px 0;
}

.field-grid-two,
.field-grid-three {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.probability-tools .calc-action-row,
.probability-tools .full-width {
  width: calc(100% - 22px);
  margin-right: 11px;
  margin-left: 11px;
}

.probability-result {
  display: block;
  min-height: 49px;
  margin-top: 10px;
  padding: 12px;
  border: 1px solid rgba(255, 118, 173, 0.25);
  border-radius: 11px;
  background: var(--pink-wash);
  color: var(--pink-bright);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  line-height: 1.45;
}

.inference-intro {
  margin: 0 2px 10px;
}

.inference-tools .probability-result {
  width: calc(100% - 22px);
  margin-right: 11px;
  margin-left: 11px;
  border-color: rgba(168, 117, 255, 0.42);
  background: rgba(168, 117, 255, 0.1);
  color: #d8c7ff;
  white-space: pre-line;
}

.celebration-layer {
  position: fixed;
  z-index: 120;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.cat-confetti,
.confetti-piece {
  position: absolute;
  top: -60px;
  animation: confetti-fall 1500ms cubic-bezier(0.2, 0.65, 0.35, 1) forwards;
}

.cat-confetti {
  width: 32px;
  height: 32px;
  background-image: url("assets/module-mascots-v2.png");
  background-repeat: no-repeat;
  background-size: 200% 200%;
  filter: drop-shadow(0 2px 0 rgba(0, 0, 0, 0.55));
}

.cat-confetti[data-mascot="1"] { background-position: 0 0; }
.cat-confetti[data-mascot="2"] { background-position: 100% 0; }
.cat-confetti[data-mascot="3"] { background-position: 0 100%; }
.cat-confetti[data-mascot="4"] { background-position: 100% 100%; }

.confetti-piece {
  width: 7px;
  height: 13px;
  border-radius: 2px;
  background: var(--pink);
}

@keyframes confetti-fall {
  0% { transform: translate3d(0, -40px, 0) rotate(0deg); opacity: 0; }
  12% { opacity: 1; }
  100% { transform: translate3d(var(--drift), calc(100vh + 90px), 0) rotate(var(--spin)); opacity: 0.9; }
}

.toast {
  position: fixed;
  z-index: 130;
  right: max(16px, var(--safe-right));
  bottom: max(82px, calc(74px + var(--safe-bottom)));
  left: max(16px, var(--safe-left));
  max-width: 430px;
  margin-left: auto;
  padding: 13px 15px;
  border: 1px solid rgba(255, 118, 173, 0.35);
  border-radius: 13px;
  background: #24131b;
  color: var(--text);
  box-shadow: var(--shadow);
  font-size: 0.79rem;
  font-weight: 700;
}

.toast[hidden] {
  display: none;
}

/* Bright 90s study-arcade layer */
.eyebrow,
.card-kicker,
.question-count,
.module-number-chip,
.module-nav-percent,
.soon-badge {
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
}

.brand-mark {
  border: 2px solid var(--pink);
  background: #160810;
  box-shadow: 4px 4px 0 rgba(168, 117, 255, 0.42);
}

.course-progress-card {
  border: 1px solid rgba(33, 215, 255, 0.55);
  background: linear-gradient(135deg, rgba(33, 215, 255, 0.12), rgba(255, 79, 163, 0.08)), #050505;
  box-shadow: 3px 3px 0 rgba(33, 215, 255, 0.18);
}

.module-nav-percent {
  margin-left: auto;
  color: var(--yellow);
  font-size: 0.65rem;
  letter-spacing: 0;
}

.module-heading svg {
  flex: 0 0 auto;
}

.module-group:nth-child(4n + 1) .module-heading { color: var(--pink-bright); }
.module-group:nth-child(4n + 2) .module-heading { color: var(--cyan); }
.module-group:nth-child(4n + 3) .module-heading { color: var(--yellow); }
.module-group:nth-child(4n + 4) .module-heading { color: var(--green); }

.section-link:hover,
.section-link.is-active {
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: #111;
}

.hero {
  border: 2px solid var(--pink);
  border-radius: 18px;
  background:
    linear-gradient(125deg, rgba(255, 79, 163, 0.2), transparent 38%),
    linear-gradient(305deg, rgba(33, 215, 255, 0.12), transparent 40%),
    #070707;
  box-shadow: 8px 8px 0 rgba(168, 117, 255, 0.38), 0 0 55px rgba(255, 79, 163, 0.12);
}

.hero::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 7px;
  background: repeating-linear-gradient(90deg, var(--pink) 0 18px, var(--yellow) 18px 36px, var(--cyan) 36px 54px, var(--purple) 54px 72px);
  content: "";
}

.hero::after {
  border: 2px solid rgba(255, 228, 92, 0.36);
  border-radius: 16px;
  box-shadow: 16px 16px 0 rgba(33, 215, 255, 0.1), 0 0 80px rgba(255, 79, 163, 0.16);
}

.page-title {
  color: #fff;
  text-shadow: 3px 3px 0 rgba(168, 117, 255, 0.42);
}

.primary-button,
.primary-small {
  border-color: var(--pink);
  background: var(--pink);
  box-shadow: 4px 4px 0 rgba(255, 228, 92, 0.32);
}

.secondary-button,
.secondary-small {
  border-color: rgba(33, 215, 255, 0.55);
  background: #080b0c;
  box-shadow: 3px 3px 0 rgba(33, 215, 255, 0.14);
}

.dashboard-card {
  border-width: 2px;
  border-radius: 15px;
  background: #070707;
}

.dashboard-grid .dashboard-card:nth-child(1) {
  border-color: rgba(33, 215, 255, 0.72);
  box-shadow: 5px 5px 0 rgba(33, 215, 255, 0.19);
}

.dashboard-grid .dashboard-card:nth-child(2) {
  border-color: rgba(168, 117, 255, 0.76);
  box-shadow: 5px 5px 0 rgba(168, 117, 255, 0.2);
}

.dashboard-grid .dashboard-card:nth-child(3) {
  border-color: rgba(88, 245, 154, 0.65);
  box-shadow: 5px 5px 0 rgba(88, 245, 154, 0.16);
}

.dashboard-grid .dashboard-card:nth-child(1) .card-kicker { color: var(--cyan); }
.dashboard-grid .dashboard-card:nth-child(2) .card-kicker { color: var(--purple); }
.dashboard-grid .dashboard-card:nth-child(3) .card-kicker { color: var(--green); }

.mastery-number {
  color: var(--yellow);
  text-shadow: 3px 3px 0 rgba(255, 79, 163, 0.32);
}

.mastery-bar,
.module-progress-track {
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: #020202;
}

.module-dashboard-grid {
  display: grid;
  gap: 18px;
}

.module-dashboard-card {
  --module-accent: var(--pink);
  --module-shadow: rgba(255, 79, 163, 0.22);
  padding: clamp(17px, 4vw, 25px);
  border: 2px solid var(--module-accent);
  border-radius: 16px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--module-accent) 11%, transparent), transparent 40%),
    #060606;
  box-shadow: 7px 7px 0 var(--module-shadow);
}

.module-dashboard-card[data-module="2"] { --module-accent: var(--cyan); --module-shadow: rgba(33, 215, 255, 0.2); }
.module-dashboard-card[data-module="3"] { --module-accent: var(--yellow); --module-shadow: rgba(255, 228, 92, 0.18); }
.module-dashboard-card[data-module="4"] { --module-accent: var(--green); --module-shadow: rgba(88, 245, 154, 0.18); }

.module-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.module-card-header h2 {
  margin: 9px 0 0;
  font-size: clamp(1.2rem, 4vw, 1.6rem);
  letter-spacing: -0.035em;
}

.module-card-header p {
  margin: 7px 0 0;
  color: var(--text-muted);
  font-size: 0.76rem;
}

.module-card-character > strong {
  color: var(--module-accent);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  letter-spacing: -0.08em;
}

.module-card-character {
  display: grid;
  flex: 0 0 auto;
  justify-items: center;
  gap: 2px;
  margin-top: -9px;
}

.module-card-character .module-mascot {
  width: clamp(66px, 19vw, 92px);
}

.module-number-chip {
  display: inline-flex;
  min-height: 27px;
  align-items: center;
  padding: 4px 9px;
  border: 1px solid var(--module-accent);
  border-radius: 6px;
  background: color-mix(in srgb, var(--module-accent) 13%, #000);
  color: var(--module-accent);
  font-size: 0.63rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.module-progress-track {
  height: 9px;
  margin: 17px 0;
  overflow: hidden;
  border-radius: 3px;
}

.module-progress-track span {
  display: block;
  height: 100%;
  background: repeating-linear-gradient(90deg, var(--module-accent) 0 16px, color-mix(in srgb, var(--module-accent) 55%, #fff) 16px 21px);
}

.module-section-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.module-section-link {
  display: grid;
  grid-template-columns: 35px minmax(0, 1fr) auto;
  min-height: 52px;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid #343138;
  border-radius: 9px;
  background: #020202;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.module-section-link:hover,
.module-section-link:focus-visible {
  border-color: var(--module-accent);
  background: color-mix(in srgb, var(--module-accent) 8%, #020202);
}

.module-section-link > span {
  color: var(--module-accent);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.69rem;
  font-weight: 900;
}

.module-section-link strong {
  overflow: hidden;
  font-size: 0.75rem;
  line-height: 1.2;
  text-overflow: ellipsis;
}

.module-section-link small {
  color: var(--text-muted);
  font-family: ui-monospace, monospace;
  font-size: 0.64rem;
}

.module-section-link.mastered {
  border-color: rgba(88, 245, 154, 0.55);
}

.module-section-link.mastered small {
  color: var(--green);
}

.module-start-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 8px;
  margin-top: 15px;
  padding: 9px 14px;
  border: 1px solid var(--module-accent);
  border-radius: 9px;
  background: var(--module-accent);
  color: #000;
  font-size: 0.75rem;
  font-weight: 900;
  cursor: pointer;
  box-shadow: 3px 3px 0 color-mix(in srgb, var(--module-accent) 32%, transparent);
}

.section-header {
  --module-accent: var(--pink);
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 5vw, 30px);
  border: 2px solid var(--module-accent);
  border-radius: 15px;
  background: linear-gradient(125deg, color-mix(in srgb, var(--module-accent) 14%, transparent), transparent 44%), #060606;
  box-shadow: 7px 7px 0 color-mix(in srgb, var(--module-accent) 21%, transparent);
}

.section-header[data-module="2"] { --module-accent: var(--cyan); }
.section-header[data-module="3"] { --module-accent: var(--yellow); }
.section-header[data-module="4"] { --module-accent: var(--green); }

.section-header::after {
  position: absolute;
  top: 12px;
  right: 14px;
  width: 44px;
  height: 44px;
  background:
    linear-gradient(45deg, var(--module-accent) 25%, transparent 25% 75%, var(--module-accent) 75%),
    linear-gradient(45deg, var(--module-accent) 25%, transparent 25% 75%, var(--module-accent) 75%);
  background-position: 0 0, 8px 8px;
  background-size: 16px 16px;
  content: "";
  opacity: 0.2;
}

.section-mascot {
  position: relative;
  z-index: 2;
  float: right;
  width: clamp(84px, 23vw, 132px);
  margin: 6px -4px 9px 15px;
}

.section-header .section-meta {
  clear: both;
}

.question-card {
  --q-accent: var(--pink);
  --q-wash: rgba(255, 79, 163, 0.1);
  --q-shadow: rgba(255, 79, 163, 0.2);
  position: relative;
  border: 2px solid var(--q-accent);
  border-radius: 15px;
  background: linear-gradient(135deg, var(--q-wash), transparent 28%), #070707;
  box-shadow: 7px 7px 0 var(--q-shadow);
}

.question-card[data-accent="1"] { --q-accent: var(--cyan); --q-wash: rgba(33, 215, 255, 0.09); --q-shadow: rgba(33, 215, 255, 0.18); }
.question-card[data-accent="2"] { --q-accent: var(--yellow); --q-wash: rgba(255, 228, 92, 0.09); --q-shadow: rgba(255, 228, 92, 0.17); }
.question-card[data-accent="3"] { --q-accent: var(--purple); --q-wash: rgba(168, 117, 255, 0.1); --q-shadow: rgba(168, 117, 255, 0.2); }
.question-card[data-accent="4"] { --q-accent: var(--green); --q-wash: rgba(88, 245, 154, 0.08); --q-shadow: rgba(88, 245, 154, 0.17); }
.question-card[data-accent="5"] { --q-accent: var(--orange); --q-wash: rgba(255, 146, 63, 0.09); --q-shadow: rgba(255, 146, 63, 0.18); }

.question-card::before {
  position: absolute;
  top: 0;
  right: 20px;
  left: 20px;
  height: 4px;
  background: repeating-linear-gradient(90deg, var(--q-accent) 0 12px, transparent 12px 18px);
  content: "";
}

.question-card.is-mastered,
.question-card.is-learning {
  border-color: var(--q-accent);
}

.question-count {
  display: inline-flex;
  min-height: 27px;
  align-items: center;
  padding: 4px 8px;
  border: 1px solid var(--q-accent);
  border-radius: 6px;
  background: var(--q-wash);
  color: var(--q-accent);
}

.question-card .calculator-tip-button {
  color: var(--q-accent);
}

.question-status-group {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.question-mascot {
  width: 38px;
  filter: drop-shadow(0 2px 0 rgba(0, 0, 0, 0.5));
}

.mastery-mascot {
  width: 72px;
}

.question-card .choice {
  border-color: #39353c;
  background: #020202;
}

.question-card .choice:hover {
  border-color: var(--q-accent);
  background: var(--q-wash);
}

.question-card .choice:has(input:checked) {
  border-color: var(--q-accent);
  background: var(--q-wash);
  box-shadow: 3px 3px 0 var(--q-shadow);
}

.question-card .choice:has(input:checked) .choice-letter {
  border-color: var(--q-accent);
  background: var(--q-accent);
  color: #000;
}

.question-card .choice:has(input:focus-visible) {
  outline-color: var(--q-accent);
}

.data-table,
.stem-display,
.formula-display {
  border-width: 2px;
  border-color: color-mix(in srgb, var(--q-accent) 52%, #333);
  background: #010101;
}

.calculator {
  border-width: 2px;
  border-color: var(--pink);
  background: rgba(3, 3, 3, 0.99);
  box-shadow: 0 -20px 80px rgba(255, 79, 163, 0.18), 0 0 0 1px rgba(33, 215, 255, 0.16);
}

.calculator-tabs {
  border-color: rgba(33, 215, 255, 0.42);
  background: #000;
}

.calculator-tab:nth-child(1).is-active { background: var(--pink-soft); color: var(--pink-bright); }
.calculator-tab:nth-child(2).is-active { background: rgba(33, 215, 255, 0.15); color: var(--cyan); }
.calculator-tab:nth-child(3).is-active { background: rgba(255, 228, 92, 0.14); color: var(--yellow); }
.calculator-tab:nth-child(4).is-active { background: rgba(168, 117, 255, 0.15); color: #cdb3ff; }

.key {
  border-color: #3a363d;
  background: #0a0a0a;
}

.key:nth-child(5n + 1) {
  border-color: rgba(168, 117, 255, 0.42);
}

.toast {
  border-width: 2px;
  border-color: var(--yellow);
  background: #140f02;
  box-shadow: 5px 5px 0 rgba(255, 79, 163, 0.3);
}

/* Tests, full review, and the black-hat app mascot */
.practice-exam-link {
  margin-top: 5px;
}

.practice-exam-link .nav-icon {
  color: var(--yellow);
}

.practice-exam-link.is-active {
  background: rgba(255, 228, 92, 0.12);
  box-shadow: inset 3px 0 0 var(--yellow);
}

.module-test-link {
  margin-top: 5px;
  border: 1px dashed color-mix(in srgb, var(--pink) 46%, #333);
  background: rgba(255, 79, 163, 0.045);
}

.module-test-link .section-number {
  color: var(--yellow);
  font-size: 0.8rem;
}

.test-best-badge {
  color: var(--cyan);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.58rem;
  font-weight: 900;
  white-space: nowrap;
}

.module-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 15px;
}

.module-card-actions .module-start-button {
  margin-top: 0;
}

.module-test-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid var(--module-accent);
  border-radius: 9px;
  background: #020202;
  color: var(--module-accent);
  font-size: 0.75rem;
  font-weight: 900;
  cursor: pointer;
}

.module-test-button span {
  padding: 3px 6px;
  border-radius: 5px;
  background: color-mix(in srgb, var(--module-accent) 14%, #000);
  color: var(--text-soft);
  font-family: ui-monospace, monospace;
  font-size: 0.62rem;
}

.exam-promo-card {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  margin-top: 20px;
  padding: clamp(17px, 4vw, 25px);
  border: 2px solid var(--yellow);
  border-radius: 16px;
  background:
    linear-gradient(130deg, rgba(255, 228, 92, 0.12), transparent 45%),
    linear-gradient(310deg, rgba(168, 117, 255, 0.12), transparent 42%),
    #060606;
  box-shadow: 7px 7px 0 rgba(168, 117, 255, 0.25);
}

.exam-promo-icon {
  display: grid;
  width: 88px;
  height: 88px;
  place-items: center;
  border: 2px solid var(--pink);
  border-radius: 20px;
  background: #12070d;
  transform: rotate(-3deg);
}

.exam-promo-icon img {
  width: 82px;
  height: 82px;
  object-fit: contain;
}

.exam-promo-card h2 {
  margin: 0;
  font-size: clamp(1.15rem, 4vw, 1.55rem);
}

.exam-promo-card p {
  max-width: 580px;
  margin: 7px 0 0;
  color: var(--text-soft);
  font-size: 0.84rem;
  line-height: 1.5;
}

.assessment-header {
  --module-accent: var(--pink);
  position: relative;
  overflow: hidden;
  margin-bottom: 18px;
  padding: clamp(21px, 5vw, 32px);
  border: 2px solid var(--module-accent);
  border-radius: 16px;
  background:
    linear-gradient(125deg, color-mix(in srgb, var(--module-accent) 16%, transparent), transparent 45%),
    #060606;
  box-shadow: 7px 7px 0 color-mix(in srgb, var(--module-accent) 22%, transparent);
}

.assessment-header[data-module="2"] { --module-accent: var(--cyan); }
.assessment-header[data-module="3"] { --module-accent: var(--yellow); }
.assessment-header[data-module="4"] { --module-accent: var(--green); }

.assessment-header h1 {
  margin: 0;
  font-size: clamp(1.9rem, 7vw, 3.35rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.assessment-header > p {
  max-width: 680px;
  margin: 13px 0 0;
  color: var(--text-soft);
  font-size: 0.94rem;
  line-height: 1.55;
}

.assessment-mascot {
  position: relative;
  z-index: 2;
  float: right;
  width: clamp(88px, 24vw, 130px);
  margin: -2px -4px 10px 16px;
}

.assessment-header-meta {
  display: flex;
  clear: both;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 17px;
}

.assessment-header-meta span,
.exam-source-label {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 4px 9px;
  border: 1px solid color-mix(in srgb, var(--module-accent, var(--yellow)) 48%, #333);
  border-radius: 7px;
  background: #030303;
  color: var(--text-soft);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.63rem;
  font-weight: 850;
}

.assessment-progress-card,
.assessment-score-card,
.assessment-submit-bar {
  border: 2px solid var(--purple);
  border-radius: 15px;
  background: #060606;
  box-shadow: 5px 5px 0 rgba(168, 117, 255, 0.2);
}

.assessment-progress-card {
  display: grid;
  gap: 12px;
  margin: 20px 0;
  padding: 16px 18px;
}

.assessment-progress-card > div:first-child {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.assessment-progress-card span,
.assessment-submit-bar span {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.assessment-progress {
  height: 10px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 3px;
  background: #000;
}

.assessment-progress span {
  display: block;
  height: 100%;
  background: repeating-linear-gradient(90deg, var(--purple) 0 18px, var(--pink) 18px 24px);
  transition: width 180ms ease;
}

.assessment-score-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
  margin: 20px 0;
  padding: 20px;
  border-color: var(--green);
  box-shadow: 6px 6px 0 rgba(88, 245, 154, 0.2);
}

.assessment-score-number {
  display: grid;
  min-width: 100px;
  min-height: 100px;
  place-items: center;
  align-content: center;
  border: 2px solid var(--green);
  border-radius: 18px;
  background: rgba(88, 245, 154, 0.09);
}

.assessment-score-number strong {
  color: var(--green);
  font-family: ui-monospace, monospace;
  font-size: 1.8rem;
}

.assessment-score-number span {
  color: var(--text-soft);
  font-size: 0.76rem;
}

.assessment-score-card h2 {
  margin: 0;
  font-size: 1.08rem;
}

.assessment-score-card p {
  margin: 7px 0 0;
  color: var(--text-soft);
  font-size: 0.8rem;
  line-height: 1.48;
}

.assessment-question-stack {
  margin-top: 20px;
}

.assessment-question.is-assessment-correct {
  border-color: var(--green);
}

.assessment-question.is-assessment-wrong {
  border-color: var(--red);
}

.exam-source-label {
  margin-left: auto;
  border-color: var(--q-accent);
  color: var(--q-accent);
}

.assessment-saved-label,
.assessment-result-pill {
  color: var(--text-muted);
  font-family: ui-monospace, monospace;
  font-size: 0.68rem;
  font-weight: 850;
}

.assessment-result-pill {
  padding: 5px 9px;
  border: 1px solid currentColor;
  border-radius: 6px;
}

.assessment-result-pill.correct { color: var(--green); }
.assessment-result-pill.wrong { color: var(--red); }

.assessment-submit-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 22px;
  padding: 18px;
  border-color: var(--yellow);
  box-shadow: 5px 5px 0 rgba(255, 228, 92, 0.16);
}

.assessment-submit-bar > div:first-child {
  display: grid;
  gap: 4px;
}

.assessment-submit-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.empty-state {
  padding: clamp(25px, 7vw, 52px);
  border: 2px solid var(--pink);
  border-radius: 16px;
  background: #060606;
}

.empty-state h1 { margin: 0; }
.empty-state p { color: var(--text-soft); }

.assessment-question .question-topline {
  flex-wrap: wrap;
}

@media (max-width: 619px) {
  .exam-promo-card {
    grid-template-columns: 70px minmax(0, 1fr);
    gap: 13px;
  }

  .exam-promo-icon {
    width: 68px;
    height: 68px;
    border-radius: 15px;
  }

  .exam-promo-icon img {
    width: 64px;
    height: 64px;
  }

  .exam-promo-card .primary-button {
    grid-column: 1 / -1;
    width: 100%;
  }

  .assessment-score-card {
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 13px;
  }

  .assessment-score-number {
    min-width: 82px;
    min-height: 82px;
  }

  .assessment-score-number strong {
    font-size: 1.35rem;
  }

  .assessment-score-card .secondary-button {
    grid-column: 1 / -1;
    width: 100%;
  }

  .assessment-submit-actions,
  .assessment-submit-actions .primary-button,
  .assessment-submit-actions .secondary-button {
    width: 100%;
  }
}

@media (min-width: 620px) {
  .module-section-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .dashboard-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cat-note {
    grid-column: 1 / -1;
  }

  .field-grid-three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .calculator {
    right: max(18px, var(--safe-right));
    bottom: max(18px, var(--safe-bottom));
    left: auto;
    width: min(430px, calc(100vw - 36px));
    max-height: min(740px, calc(100dvh - 36px));
    border: 1px solid var(--line-bright);
    border-radius: 20px;
    transform: translateY(calc(100% + 30px));
  }

  .calculator-handle {
    display: none;
  }
}

@media (min-width: 900px) {
  .sidebar {
    width: var(--sidebar-width);
    box-shadow: none;
    transform: none;
  }

  .drawer-scrim,
  .drawer-close,
  .mobile-header {
    display: none !important;
  }

  .main-column {
    margin-left: var(--sidebar-width);
  }

  main {
    padding: 54px 46px 130px;
  }

  .dashboard-grid {
    grid-template-columns: 1.08fr 0.92fr;
  }

  .cat-note {
    grid-column: auto;
  }

  .hero {
    min-height: 310px;
    display: flex;
    align-items: center;
  }

  .hero-content {
    max-width: 66%;
  }

  .hero-mascot-party {
    position: absolute;
    right: 22px;
    bottom: 14px;
    grid-template-columns: repeat(2, 1fr);
    width: 290px;
    margin: 0;
  }
}

@media (max-width: 420px) {
  .module-card-character .module-mascot {
    width: 62px;
  }

  .section-mascot {
    width: 78px;
    margin-left: 9px;
  }

  .calculator-fab span {
    display: none;
  }

  .calculator-fab {
    width: 52px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
  }

  .question-footer > .primary-small,
  .question-footer > .secondary-small {
    flex: 1;
  }

  .section-overview-card {
    grid-template-columns: 42px minmax(0, 1fr) 18px;
    padding: 11px;
  }

  .section-overview-card .section-number-box {
    width: 42px;
    height: 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}