:root {
  color-scheme: dark;
  --bg: #101014;
  --side: #151519;
  --panel: #19191f;
  --panel2: #202027;
  --line: #2a2a32;
  --text: #f1f0f5;
  --muted: #95949f;
  --purple: #ad9af8;
  --purple-soft: #a18af51a;
  --green: #99d5b3;
  --orange: #e8ba8f;
  --red: #f29f9f;
  --font: "DM Sans", sans-serif;
  --display: "Space Grotesk", sans-serif;
  --mono: "JetBrains Mono", monospace;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}
button,
input,
textarea,
select {
  font: inherit;
}
button,
a,
input,
textarea,
select {
  -webkit-tap-highlight-color: transparent;
}
button,
a {
  touch-action: manipulation;
}
button {
  cursor: pointer;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  color: inherit;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
svg {
  vertical-align: middle;
  flex-shrink: 0;
}
button,
input,
textarea,
select,
a {
  outline-offset: 5px;
}
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--purple);
}
input,
textarea,
select {
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 9px;
  padding: 12px 14px;
  outline-color: var(--purple);
  max-width: 100%;
}
textarea {
  resize: vertical;
  min-height: 120px;
  width: 100%;
}
label {
  display: block;
}
h1,
h2,
h3,
h4,
p {
  margin: 0;
}
h1,
h2,
h3,
h4 {
  font-family: var(--display);
  line-height: 1.25;
  font-weight: 600;
}
h1 {
  font-size: 36px;
  letter-spacing: -1.3px;
}
h2 {
  font-size: 22px;
  letter-spacing: -0.5px;
}
h3 {
  font-size: 18px;
}
p {
  line-height: 1.7;
}
::selection {
  background: #a494fb55;
}
.muted {
  color: var(--muted);
}
.mono {
  font-family: var(--mono);
}
.small {
  font-size: 12px;
}
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 230px;
  border-right: 1px solid var(--line);
  background: var(--side);
  z-index: 30;
  display: flex;
  flex-direction: column;
  padding: 30px 19px 18px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 0 10px 34px;
  font-family: var(--display);
  font-size: 27px;
  font-weight: 600;
  letter-spacing: -1px;
}
.brand-logo {
  width: 35px;
  height: 35px;
  border-radius: 10px;
  background: var(--purple);
  display: grid;
  place-items: center;
  color: #201937;
}
.brand em {
  font-style: normal;
  color: var(--purple);
}
.nav-heading {
  font-size: 10px;
  letter-spacing: 1.7px;
  color: #777681;
  padding: 0 13px 12px;
  font-weight: 600;
}
.nav-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  text-align: left;
  border: 0;
  background: none;
  padding: 12px 13px;
  margin: 3px 0;
  border-radius: 8px;
  font-size: 13px;
  color: #a9a7b3;
  transition: 0.18s;
}
.nav-btn:hover {
  background: var(--panel2);
  color: var(--text);
}
.nav-btn.active {
  color: #c4b6ff;
  background: #a691ed17;
}
.nav-btn.active:after {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--purple);
  border-radius: 50%;
  margin-left: auto;
}
.nav-sep {
  height: 24px;
}
.nav-pill {
  margin-left: auto;
  background: #2b283c;
  border: 1px solid #443c5a;
  color: #c4b5f9;
  font-size: 9px;
  border-radius: 4px;
  line-height: 16px;
  padding: 0 5px;
}
.sidebar-bottom {
  margin-top: auto;
}
.sidebar-note {
  border: 1px solid #34313f;
  background: linear-gradient(135deg, #24202e, #1b1b21);
  border-radius: 10px;
  padding: 16px 13px;
  margin: 28px 2px 20px;
}
.sidebar-note > svg {
  color: var(--purple);
  margin-bottom: 9px;
}
.sidebar-note strong {
  display: block;
  font-size: 12px;
  font-weight: 550;
}
.sidebar-note p {
  font-size: 11px;
  color: var(--muted);
  margin: 7px 0 11px;
  line-height: 1.6;
}
.sidebar-note button {
  font-size: 11px;
  color: var(--purple);
  border: none;
  background: none;
  padding: 0;
}
.user-mini {
  display: flex;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding: 17px 8px 0;
}
.avatar {
  width: 33px;
  height: 33px;
  border-radius: 50%;
  background: #3b334c;
  border: 1px solid #544569;
  color: #d6c1fc;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 600;
}
.user-mini strong {
  font-size: 12px;
  font-weight: 500;
  display: block;
}
.user-mini small {
  font-size: 10px;
  color: var(--muted);
}
.shell {
  margin-left: 230px;
}
.topbar {
  height: 77px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 39px;
  gap: 12px;
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}
#breadcrumb {
  font-size: 12px;
  color: var(--muted);
}
#breadcrumb span {
  padding: 0 10px;
  color: #4d4b57;
}
#breadcrumb strong {
  font-weight: 400;
  color: #d2cfdc;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 19px;
}
.save-status {
  font-size: 10px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 7px;
}
.save-status i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 9px #99d5b326;
}
.icon-btn {
  background: none;
  border: none;
  display: grid;
  place-items: center;
  width: 30px;
  height: 32px;
  color: var(--muted);
  border-radius: 6px;
}
.icon-btn:hover {
  background: var(--panel2);
  color: var(--text);
}
main {
  max-width: 1440px;
  margin: auto;
  padding: 34px 39px 42px;
  min-height: calc(100vh - 137px);
}
.footer {
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 15px;
  padding: 22px 39px;
  font-size: 10px;
  color: #767480;
}
.footer b {
  font-family: var(--display);
  font-weight: 500;
  color: #b9b6c3;
}
.footer-spark {
  color: var(--purple);
  padding-left: 6px;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 10px;
  letter-spacing: 1.8px;
  color: var(--purple);
  font-weight: 600;
  text-transform: uppercase;
}
.eyebrow svg {
  width: 14px;
}
.page-intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 29px;
}
.page-intro h1 {
  font-size: 27px;
  letter-spacing: -0.7px;
  margin-bottom: 5px;
}
.page-intro p {
  font-size: 12px;
  color: var(--muted);
}
.date-chip {
  padding: 8px 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 7px;
  color: #aaa7b6;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 247px;
  gap: 20px;
  margin-bottom: 24px;
}
.hero {
  position: relative;
  min-height: 264px;
  background: linear-gradient(112deg, #252032 0%, #221e2e 52%, #211d2a 100%);
  border: 1px solid #3b324e;
  border-radius: 13px;
  overflow: hidden;
  padding: 30px 31px;
  display: flex;
}
.hero-copy {
  position: relative;
  z-index: 2;
  width: 64%;
}
.hero .eyebrow {
  font-size: 9px;
  letter-spacing: 1.6px;
}
.hero h2 {
  font-size: 33px;
  letter-spacing: -1.15px;
  line-height: 1.2;
  margin: 15px 0 12px;
}
.hero h2 span {
  color: #c2adff;
}
.hero p {
  font-size: 11px;
  color: #b2aaba;
  max-width: 300px;
  line-height: 1.8;
  margin-bottom: 21px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--panel2);
  padding: 10px 15px;
  border-radius: 7px;
  font-size: 12px;
  line-height: 1.5;
  font-weight: 500;
  transition:
    transform 0.18s,
    background 0.18s;
}
.btn:hover {
  background: #35313f;
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--purple);
  color: #20182f;
  border-color: var(--purple);
}
.btn-primary:hover {
  background: #c3b1ff;
}
.btn-ghost {
  background: transparent;
  color: var(--muted);
}
.btn-small {
  font-size: 11px;
  padding: 7px 10px;
}
.hero-art {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 42%;
  height: 100%;
  overflow: hidden;
}
.orbit {
  position: absolute;
  width: 220px;
  height: 220px;
  border: 1px solid #c3aaff15;
  transform: rotate(-28deg);
  border-radius: 50%;
  top: 23px;
  left: 8px;
}
.orbit.o2 {
  width: 310px;
  height: 310px;
  top: -20px;
  left: -36px;
}
.art-dots {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(#bd9aff44 0.8px, transparent 0.8px);
  background-size: 17px 17px;
  mask-image: radial-gradient(ellipse, #0009, transparent 70%);
}
.code-float {
  position: absolute;
  top: 65px;
  left: 2px;
  transform: rotate(-6deg);
  width: 206px;
  border: 1px solid #5a4c70;
  background: #201d2aee;
  box-shadow: 0 25px 40px #0003;
  border-radius: 9px;
  padding: 12px 14px;
  animation: float 7s ease-in-out infinite;
}
.window-dots {
  display: flex;
  gap: 4px;
  padding-bottom: 14px;
}
.window-dots i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #675471;
}
.window-dots i:first-child {
  background: #c68e9d;
}
.window-dots i:nth-child(2) {
  background: #d4ba85;
}
.window-dots i:nth-child(3) {
  background: #8cb8a6;
}
.code-float pre {
  font: 10px/1.85 var(--mono);
  margin: 0;
  color: #d0c6dd;
}
.syntax-purple {
  color: #b8a0ef;
}
.syntax-green {
  color: #aad4b8;
}
.syntax-orange {
  color: #e6b78b;
}
.floating-bracket {
  position: absolute;
  right: 11px;
  top: 33px;
  font-family: var(--mono);
  font-size: 46px;
  color: #a38acf66;
  transform: rotate(12deg);
}
.code-chip {
  position: absolute;
  right: 16px;
  bottom: 33px;
  border: 1px solid #55466d;
  border-radius: 7px;
  padding: 8px 11px;
  background: #31293fe8;
  color: #c7b1f7;
  font: 10px var(--mono);
  transform: rotate(5deg);
}
.goal-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 22px 21px;
  display: flex;
  flex-direction: column;
}
.card-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  font-weight: 550;
}
.card-heading svg {
  color: var(--purple);
}
.goal-top {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 20px 0 15px;
}
.goal-ring {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: conic-gradient(var(--purple) var(--angle, 0deg), #303039 0);
  display: grid;
  place-items: center;
  position: relative;
}
.goal-ring:before {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: var(--panel);
}
.goal-ring span {
  position: relative;
  font: 17px var(--display);
  font-weight: 500;
}
.goal-top strong {
  font-size: 11px;
  font-weight: 500;
  display: block;
}
.goal-top p {
  font-size: 10px;
  color: var(--muted);
  margin-top: 3px;
}
.goal-item {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 10px;
  color: #bdbac7;
  margin-bottom: 9px;
  cursor: pointer;
}
.goal-item input,
.check input {
  accent-color: var(--purple);
  width: 14px;
  height: 14px;
  padding: 0;
  margin: 0;
  cursor: pointer;
}
.goal-caption {
  color: #777480;
  font-size: 9px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
  margin-top: auto;
}
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 31px;
}
.stat {
  display: flex;
  align-items: center;
  gap: 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 18px;
  background: var(--panel);
}
.stat-icon {
  display: grid;
  place-items: center;
  width: 39px;
  height: 39px;
  border-radius: 9px;
  background: #a18af511;
  color: var(--purple);
}
.stat:nth-child(2) .stat-icon {
  color: var(--green);
  background: #99d5b311;
}
.stat:nth-child(3) .stat-icon {
  color: var(--orange);
  background: #e8ba8f11;
}
.stat strong {
  font: 23px var(--display);
  font-weight: 500;
}
.stat small {
  font-size: 11px;
  color: var(--muted);
  margin-left: 5px;
}
.stat p {
  font-size: 10px;
  color: var(--muted);
  margin-top: 1px;
}
.stat-aside {
  margin-left: auto;
  font-size: 9px;
  color: var(--green);
  background: #99d5b30b;
  padding: 3px 6px;
  border-radius: 4px;
}
.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 17px;
  gap: 10px;
}
.section-heading h2 {
  font-size: 18px;
}
.section-heading p {
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  color: var(--muted);
  background: none;
  border: 0;
  padding: 5px 0;
}
.text-link:hover {
  color: var(--purple);
}
.track-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.track-card {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 11px;
  overflow: hidden;
  transition:
    transform 0.22s,
    border-color 0.22s;
}
.track-card:hover {
  transform: translateY(-4px);
  border-color: #675581;
}
.track-art {
  height: 111px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid #ffffff05;
  background:
    radial-gradient(ellipse at 50% 120%, #67519935, transparent 70%), #211d2b;
  color: #b09ae5;
}
.track-card.c .track-art {
  background:
    radial-gradient(ellipse at 50% 120%, #4c8d7733, transparent 70%), #1c2624;
  color: #95c7ae;
}
.track-card.math .track-art {
  background:
    radial-gradient(ellipse at 50% 120%, #ad7e5230, transparent 70%), #29221e;
  color: #d7b18f;
}
.track-art:before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(#ffffff03 1px, transparent 1px),
    linear-gradient(90deg, #ffffff03 1px, transparent 1px);
  background-size: 19px 19px;
  mask-image: linear-gradient(90deg, transparent, #000, transparent);
}
.track-art svg {
  position: relative;
  width: 155px;
  height: 94px;
  opacity: 0.85;
}
.track-art .art-label {
  position: absolute;
  top: 12px;
  left: 14px;
  font: 8px var(--mono);
  color: currentColor;
  opacity: 0.5;
}
.track-body {
  padding: 18px;
}
.track-tag {
  font-size: 8px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--purple);
  margin-bottom: 6px;
  display: block;
}
.c .track-tag {
  color: var(--green);
}
.math .track-tag {
  color: var(--orange);
}
.track-body h3 {
  font-size: 17px;
  letter-spacing: -0.4px;
  min-height: 23px;
}
.track-body > p {
  font-size: 10px;
  line-height: 1.75;
  color: var(--muted);
  margin: 8px 0 16px;
  min-height: 36px;
}
.track-meta {
  display: flex;
  gap: 12px;
  color: #8e899a;
  font-size: 9px;
  align-items: center;
  margin-bottom: 18px;
}
.track-meta span {
  display: flex;
  gap: 4px;
  align-items: center;
}
.progress-label {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  font-size: 9px;
  color: var(--muted);
  margin-bottom: 7px;
}
.progress-label b {
  font-weight: 500;
  color: #beb0df;
}
.progress-bar {
  height: 4px;
  background: #313039;
  border-radius: 6px;
  overflow: hidden;
}
.progress-bar i {
  display: block;
  background: var(--purple);
  height: 100%;
  border-radius: 6px;
  transition: width 0.5s;
}
.c .progress-bar i {
  background: var(--green);
}
.math .progress-bar i {
  background: var(--orange);
}
.track-open {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  font-size: 10px;
  background: none;
  border: 0;
  padding: 15px 0 0;
  color: #c6bfda;
  margin-top: 12px;
  border-top: 1px solid var(--line);
}
.c .track-open {
  color: var(--green);
}
.math .track-open {
  color: var(--orange);
}
.home-bottom {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(0, 1fr);
  gap: 20px;
  margin-top: 29px;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 23px;
}
.challenge {
  display: flex;
  gap: 18px;
  align-items: center;
}
.challenge-icon {
  background: #aca0f311;
  min-width: 62px;
  height: 62px;
  border: 1px solid #a18af525;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: var(--purple);
}
.challenge-copy .eyebrow {
  font-size: 8px;
  letter-spacing: 1.3px;
}
.challenge-copy h3 {
  font-size: 16px;
  margin: 7px 0;
}
.challenge-copy p {
  font-size: 10px;
  color: var(--muted);
}
.challenge .icon-btn {
  margin-left: auto;
  color: var(--purple);
  background: #a18af511;
}
.tip {
  position: relative;
  border-color: #37332c;
  background: #201e1b;
}
.tip-label {
  font-size: 9px;
  color: #d2b58e;
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 10px;
}
.tip p {
  font-size: 11px;
  color: #c2bcb1;
  line-height: 1.7;
}
.tip small {
  color: #8c8376;
  font-size: 9px;
  display: block;
  margin-top: 7px;
}
.badge {
  font-size: 10px;
  padding: 4px 8px;
  line-height: 1.4;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--panel2);
  color: var(--muted);
}
.badge.purple {
  color: var(--purple);
  background: var(--purple-soft);
  border-color: #a18af530;
}
.badge.green {
  color: var(--green);
  background: #99d5b30b;
  border-color: #99d5b330;
}
.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.search-field {
  position: relative;
  flex: 1;
  max-width: 370px;
  min-width: 200px;
}
.search-field input {
  width: 100%;
  padding-left: 38px;
  font-size: 12px;
}
.search-field svg {
  position: absolute;
  top: 13px;
  left: 13px;
  color: var(--muted);
}
.filter {
  padding: 8px 13px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: 11px;
  color: var(--muted);
}
.filter.active {
  background: var(--purple-soft);
  color: var(--purple);
  border-color: #a18af540;
}
.course-section {
  margin-top: 30px;
}
.course-section h2 {
  font-size: 21px;
  margin-bottom: 5px;
}
.course-desc {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 18px;
}
.chapter-list {
  display: grid;
  gap: 10px;
}
.chapter-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 17px 20px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 9px;
}
.chapter-num {
  font: 15px var(--mono);
  color: var(--purple);
  width: 32px;
}
.chapter-row.completed .chapter-num {
  color: var(--green);
}
.chapter-row h3 {
  font-size: 14px;
}
.chapter-row p {
  font-size: 11px;
  color: var(--muted);
  margin-top: 3px;
}
.chapter-row .row-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 15px;
}
.chapter-row .row-right small {
  font-size: 10px;
  color: var(--muted);
  white-space: nowrap;
}
.check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  cursor: pointer;
}
.chapter-row .check {
  padding: 7px;
}
.summary-unlock {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 16px 20px;
  border: 1px dashed #484052;
  border-radius: 9px;
  background: #a18af507;
  color: var(--muted);
  font-size: 11px;
}
.summary-unlock svg {
  color: var(--purple);
}
.summary-unlock .text-link {
  margin-left: auto;
  color: var(--purple);
}
.lesson-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin: 20px 0 25px;
}
.lesson-header h1 {
  font-size: 32px;
  margin: 8px 0 10px;
}
.lesson-header p {
  font-size: 13px;
  color: var(--muted);
}
.lesson-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tabs {
  display: flex;
  gap: 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 26px;
  overflow: auto;
}
.tab {
  white-space: nowrap;
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  font-size: 12px;
  padding: 12px 0;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.tab.active {
  color: var(--purple);
  border-color: var(--purple);
}
.lesson-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 245px;
  gap: 25px;
}
.lesson-prose > section {
  margin-bottom: 27px;
}
.lesson-prose h2 {
  font-size: 20px;
  margin-bottom: 12px;
}
.lesson-prose p {
  font-size: 13px;
  color: #b7b3c2;
  line-height: 1.85;
  white-space: pre-line;
}
.code-block {
  padding: 20px;
  font: 12px/1.8 var(--mono);
  color: #c7c0d4;
  overflow: auto;
  border-radius: 8px;
  background: #131217;
  border: 1px solid var(--line);
  white-space: pre;
  margin: 15px 0;
}
.objective-card {
  padding: 19px;
  position: sticky;
  top: 20px;
}
.objective-card h3 {
  font-size: 14px;
  margin-bottom: 15px;
}
.objective-card .check {
  align-items: flex-start;
  font-size: 11px;
  color: var(--muted);
  margin: 13px 0;
  line-height: 1.6;
}
.objective-card input {
  margin-top: 3px;
  flex-shrink: 0;
}
.darija {
  border-left: 2px solid var(--orange);
  background: #e8ba8f09;
  border-radius: 0 8px 8px 0;
  padding: 18px 20px;
  margin: 24px 0;
}
.darija strong {
  font-size: 11px;
  color: var(--orange);
  display: block;
  margin-bottom: 7px;
}
.darija p {
  font-size: 13px;
  color: #c7b9a9;
  line-height: 1.9;
  white-space: pre-line;
}
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  margin: 18px 0;
}
.compare-grid > div {
  min-width: 0;
}
.compare-grid > div + div {
  border-left: 1px solid var(--line);
}
.compare-label {
  padding: 12px 17px;
  background: var(--panel2);
  font-size: 10px;
  color: var(--purple);
  font-family: var(--mono);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.compare-grid pre {
  margin: 0;
  padding: 18px;
  overflow: auto;
  font: 11px/1.9 var(--mono);
  min-height: 180px;
  background: #141319;
}
.related {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 15px;
}
.related button {
  font-size: 10px;
}
.video-shell {
  aspect-ratio: 16/9;
  background: #0a090e;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  max-height: 540px;
}
.video-shell iframe {
  width: 100%;
  height: 100%;
  border: 0;
}
.video-placeholder {
  text-align: center;
  max-width: 400px;
  padding: 25px;
}
.video-play {
  display: grid;
  place-items: center;
  width: 65px;
  height: 65px;
  border-radius: 50%;
  background: var(--purple);
  border: 0;
  color: #20182f;
  margin: 0 auto 19px;
}
.video-placeholder h2 {
  font-size: 21px;
  margin-bottom: 8px;
}
.video-placeholder p {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 19px;
}
.video-links {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}
.video-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 12px;
  background: var(--panel);
}
.video-links a svg:last-child {
  margin-left: auto;
  color: var(--muted);
}
.exercise-card {
  margin-bottom: 18px;
}
.exercise-card h3 {
  font-size: 16px;
  margin: 10px 0;
}
.exercise-card > p {
  font-size: 13px;
  color: #b9b3c6;
  white-space: pre-line;
  margin-bottom: 15px;
}
.exercise-card textarea {
  font: 12px/1.7 var(--mono);
}
.exercise-actions {
  display: flex;
  gap: 9px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 13px;
}
.hint {
  font-size: 12px;
  padding: 13px;
  border-left: 2px solid var(--purple);
  margin-top: 15px;
  background: var(--purple-soft);
  white-space: pre-line;
}
.solution {
  margin-top: 15px;
}
.solution pre {
  white-space: pre-wrap;
}
.quiz-q {
  margin-bottom: 20px;
}
.quiz-q h3 {
  font-size: 16px;
  margin-bottom: 15px;
}
.quiz-options {
  display: grid;
  gap: 8px;
}
.quiz-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: 7px;
  font-size: 12px;
  cursor: pointer;
}
.quiz-option input {
  accent-color: var(--purple);
}
.quiz-feedback {
  padding: 13px 15px;
  border-radius: 7px;
  font-size: 12px;
  margin-top: 13px;
  background: #e8ba8f0b;
  color: var(--orange);
  white-space: pre-line;
}
.quiz-feedback.correct {
  background: #99d5b30b;
  color: var(--green);
}
.empty-state {
  text-align: center;
  padding: 50px 20px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  color: var(--muted);
}
.empty-state svg {
  color: var(--purple);
  margin-bottom: 13px;
}
.empty-state h3 {
  color: var(--text);
  font-size: 18px;
  margin-bottom: 8px;
}
.empty-state p {
  font-size: 12px;
  max-width: 430px;
  margin: 0 auto 20px;
}
.notebook-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.notebook-grid h2 {
  font-size: 19px;
  margin-bottom: 15px;
}
.form-grid {
  display: grid;
  gap: 12px;
}
.form-grid label {
  font-size: 11px;
  color: var(--muted);
}
.form-grid input,
.form-grid textarea,
.form-grid select {
  display: block;
  width: 100%;
  margin-top: 6px;
}
.error-list {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}
.error-card {
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  background: var(--panel);
  padding: 17px;
  border-radius: 8px;
}
.error-card.resolved {
  border-left-color: var(--green);
  opacity: 0.7;
}
.error-card h3 {
  font-size: 14px;
}
.error-card p {
  font-size: 12px;
  color: var(--muted);
  white-space: pre-wrap;
  margin-top: 7px;
}
.error-card footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 10px;
  color: var(--muted);
  margin-top: 13px;
  gap: 10px;
}
.revision-list {
  display: grid;
  gap: 12px;
}
.revision-item {
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--line);
  padding: 18px;
  border-radius: 9px;
  background: var(--panel);
}
.revision-item > svg {
  color: var(--orange);
}
.revision-item h3 {
  font-size: 14px;
}
.revision-item p {
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
}
.revision-item .btn {
  margin-left: auto;
}
.summary-card {
  margin-top: 20px;
  border-color: #a18af540;
}
.summary-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
}
.summary-card section {
  margin: 15px 0;
}
.summary-card section h4 {
  font-size: 14px;
  margin-bottom: 5px;
}
.summary-card p {
  font-size: 12px;
  color: var(--muted);
  white-space: pre-line;
}
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: #050408bb;
  backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
  padding: 20px;
}
.modal {
  background: var(--panel);
  border: 1px solid #45404f;
  max-width: 670px;
  width: 100%;
  max-height: 88vh;
  overflow: auto;
  padding: 27px;
  border-radius: 14px;
  box-shadow: 0 25px 100px #0005;
}
.modal-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.modal h2 {
  font-size: 23px;
}
.modal .form-grid {
  margin-bottom: 20px;
}
.modal p {
  font-size: 12px;
  color: var(--muted);
}
.settings-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 15px 0;
}
.toast {
  position: fixed;
  z-index: 100;
  left: calc(50% + 115px);
  bottom: 30px;
  transform: translate(-50%, 20px);
  opacity: 0;
  pointer-events: none;
  background: #393044;
  color: #e7d9ff;
  border: 1px solid #6c5a80;
  box-shadow: 0 12px 30px #0004;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 12px;
  transition: 0.25s;
  max-width: 90vw;
}
.toast.visible {
  opacity: 1;
  transform: translate(-50%, 0);
}
.mobile-menu,
.mobile-shade {
  display: none;
}
.fade-in {
  animation: enter 0.4s ease both;
}
.next-lesson {
  display: flex;
  justify-content: space-between;
  gap: 15px;
  margin-top: 27px;
  flex-wrap: wrap;
}
.note-preview {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 17px;
  margin-top: 12px;
}
.note-preview h3 {
  font-size: 14px;
  margin-bottom: 6px;
}
.note-preview p {
  font-size: 12px;
  color: var(--muted);
  white-space: pre-wrap;
}
.saved-label {
  font-size: 10px;
  color: var(--green);
  margin-top: 8px;
}
.danger {
  color: var(--red);
}
.settings-note {
  border-top: 1px solid var(--line);
  margin-top: 17px;
  padding-top: 16px;
}
.track-title-icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  background: var(--purple-soft);
  color: var(--purple);
  border-radius: 8px;
  margin-right: 10px;
}
.mobile-shade.visible {
  display: block;
  position: fixed;
  inset: 0;
  background: #0009;
  z-index: 25;
}
body.light {
  color-scheme: light;
  --bg: #f6f5fa;
  --side: #fff;
  --panel: #fff;
  --panel2: #eeecf5;
  --line: #dedbe7;
  --text: #24202f;
  --muted: #787184;
  --purple: #7856cf;
  --purple-soft: #7856cf13;
  --green: #3c8a66;
  --orange: #ab7546;
  --red: #b04747;
}
.light .hero {
  background: linear-gradient(112deg, #e9e0fc, #f2eaff);
  border-color: #d6c7ed;
}
.light .hero p {
  color: #76628d;
}
.light .hero h2 span {
  color: #7856cf;
}
.light .hero .eyebrow {
  color: #7856cf;
}
.light .nav-btn {
  color: #766d86;
}
.light .nav-btn.active {
  color: var(--purple);
}
.light .sidebar-note {
  background: #f0ebf8;
  border-color: #e1d9ee;
}
.light .stat-icon {
  background: #7856cf11;
}
.light .track-body > p,
.light .track-meta {
  color: var(--muted);
}
.light .track-open {
  color: var(--purple);
}
.light .tip {
  background: #fffbf5;
  border-color: #e9dcc9;
}
.light .tip p {
  color: #7f6d56;
}
.light .lesson-prose p {
  color: #6c6476;
}
.light .code-block,
.light .compare-grid pre {
  background: #eeecf4;
  color: #4e425d;
}
.light .exercise-card > p {
  color: #6c6476;
}
.light #breadcrumb strong {
  color: #51475e;
}
.light .goal-item {
  color: #73677e;
}
.light .track-art {
  color: #bda3ef;
}
.light .chapter-row .chapter-num {
  color: var(--purple);
}
.light .video-shell {
  color: #f1f0f5;
}
.light .modal-backdrop {
  background: #29203f80;
}
.light .sidebar-note strong {
  color: #4f4164;
}
.light .footer b {
  color: #62556d;
}
@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(-6deg);
  }
  50% {
    transform: translateY(-9px) rotate(-4deg);
  }
}
@keyframes enter {
  from {
    opacity: 0;
    transform: translateY(7px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (min-width: 1500px) {
  main {
    padding-top: 42px;
  }
  .hero {
    min-height: 290px;
  }
  .hero h2 {
    font-size: 39px;
  }
  .hero p {
    font-size: 12px;
  }
  .track-art {
    height: 135px;
  }
  .track-body {
    padding: 22px;
  }
  .track-body h3 {
    font-size: 20px;
  }
  .track-body > p {
    font-size: 12px;
  }
  .track-meta,
  .track-open,
  .progress-label {
    font-size: 11px;
  }
}
@media (max-width: 1200px) {
  .sidebar {
    width: 205px;
    padding-left: 13px;
    padding-right: 13px;
  }
  .shell {
    margin-left: 205px;
  }
  .topbar {
    padding: 0 25px;
  }
  main {
    padding: 28px 25px;
  }
  .hero-grid {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 15px;
  }
  .hero {
    padding: 25px;
    min-height: 264px;
  }
  .hero h2 {
    font-size: 29px;
  }
  .hero-art {
    width: 39%;
    opacity: 0.8;
  }
  .hero-copy {
    width: 70%;
  }
  .code-float {
    left: 12px;
  }
  .goal-card {
    padding: 20px 16px;
  }
  .stats-row,
  .track-grid {
    gap: 13px;
  }
  .track-body {
    padding: 15px;
  }
  .track-body h3 {
    font-size: 15px;
  }
  .stat {
    padding: 14px 13px;
    gap: 10px;
  }
  .stat-aside {
    display: none;
  }
  .home-bottom {
    grid-template-columns: 1.6fr 1fr;
  }
  .toast {
    left: calc(50% + 102px);
  }
  .lesson-columns {
    grid-template-columns: minmax(0, 1fr) 210px;
  }
}
@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero {
    min-height: 250px;
  }
  .hero-art {
    width: 40%;
  }
  .hero-copy {
    width: 66%;
  }
  .goal-card {
    display: none;
  }
  .track-grid {
    grid-template-columns: 1fr;
  }
  .track-card {
    display: grid;
    grid-template-columns: 145px 1fr;
  }
  .track-art {
    height: 100%;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }
  .track-art svg {
    width: 130px;
  }
  .track-body > p {
    min-height: 0;
  }
  .track-body h3 {
    font-size: 18px;
  }
  .track-meta {
    margin-bottom: 10px;
  }
  .track-body {
    padding: 19px;
  }
  .track-open {
    padding-top: 10px;
    margin-top: 9px;
  }
  .home-bottom {
    grid-template-columns: 1fr;
  }
  .lesson-columns {
    grid-template-columns: 1fr;
  }
  .objective-card {
    position: static;
  }
  .lesson-columns > aside {
    grid-row: 1;
  }
  .objective-card .check {
    display: inline-flex;
    margin-right: 15px;
  }
  .lesson-header {
    display: block;
  }
  .lesson-actions {
    margin-top: 18px;
  }
  .notebook-grid {
    grid-template-columns: 1fr;
  }
  .topbar-right {
    gap: 12px;
  }
  .save-status {
    font-size: 9px;
  }
  .stats-row {
    gap: 10px;
  }
  .stat-icon {
    width: 31px;
    height: 31px;
  }
  .stat strong {
    font-size: 21px;
  }
  .stat small {
    font-size: 9px;
  }
}
@media (max-width: 700px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s;
    width: 235px;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .shell {
    margin-left: 0;
  }
  .topbar {
    height: 65px;
    padding: 0 17px;
  }
  .mobile-menu {
    display: grid;
  }
  .topbar-left {
    gap: 6px;
  }
  .topbar-right {
    gap: 7px;
  }
  .save-status {
    font-size: 0;
    gap: 0;
  }
  .save-status i {
    width: 6px;
    height: 6px;
  }
  .topbar-right .avatar {
    width: 29px;
    height: 29px;
  }
  .topbar-left #breadcrumb {
    font-size: 10px;
  }
  .topbar-left #breadcrumb span {
    padding: 0 7px;
  }
  main {
    padding: 25px 18px 35px;
  }
  .page-intro {
    margin-bottom: 23px;
  }
  .page-intro h1 {
    font-size: 24px;
  }
  .date-chip {
    font-size: 0;
    padding: 8px;
  }
  .date-chip svg {
    width: 15px;
  }
  .hero {
    padding: 26px 23px;
    min-height: 268px;
  }
  .hero-copy {
    width: 85%;
  }
  .hero h2 {
    font-size: 32px;
  }
  .hero p {
    max-width: 240px;
  }
  .hero-art {
    opacity: 0.35;
    width: 42%;
    right: -20px;
  }
  .hero .btn {
    position: relative;
  }
  .hero-grid {
    margin-bottom: 17px;
  }
  .stats-row {
    gap: 8px;
    margin-bottom: 27px;
  }
  .stat {
    padding: 12px 8px;
    display: block;
    position: relative;
  }
  .stat-icon {
    width: 25px;
    height: 25px;
    border-radius: 6px;
    margin-bottom: 9px;
  }
  .stat-icon svg {
    width: 14px;
  }
  .stat strong {
    font-size: 20px;
  }
  .stat small {
    font-size: 8px;
    margin-left: 3px;
  }
  .stat p {
    font-size: 8px;
  }
  .section-heading h2 {
    font-size: 17px;
  }
  .section-heading p {
    font-size: 10px;
  }
  .text-link {
    font-size: 9px;
  }
  .track-grid {
    gap: 13px;
  }
  .track-card {
    grid-template-columns: 95px 1fr;
  }
  .track-art svg {
    width: 100px;
    transform: scale(0.9);
  }
  .track-art .art-label {
    display: none;
  }
  .track-body {
    padding: 17px 15px;
  }
  .track-body h3 {
    font-size: 17px;
  }
  .track-body > p {
    font-size: 10px;
    margin: 7px 0 11px;
  }
  .track-meta {
    font-size: 8px;
    gap: 9px;
  }
  .track-tag {
    font-size: 7px;
  }
  .home-bottom {
    gap: 14px;
    margin-top: 23px;
  }
  .panel {
    padding: 20px;
  }
  .challenge {
    gap: 13px;
  }
  .challenge-icon {
    min-width: 45px;
    height: 45px;
    border-radius: 10px;
  }
  .challenge-icon svg {
    width: 23px;
  }
  .challenge-copy h3 {
    font-size: 14px;
  }
  .challenge-copy p {
    font-size: 9px;
  }
  .footer {
    padding: 20px 18px;
    font-size: 9px;
  }
  .footer > span:last-child {
    display: none;
  }
  .toast {
    left: 50%;
    width: max-content;
    max-width: 90vw;
  }
  .chapter-row {
    padding: 14px 12px;
    gap: 9px;
  }
  .chapter-num {
    font-size: 12px;
    width: 26px;
  }
  .chapter-row h3 {
    font-size: 12px;
  }
  .chapter-row p {
    font-size: 10px;
  }
  .chapter-row .row-right {
    gap: 3px;
  }
  .chapter-row .row-right small {
    display: none;
  }
  .chapter-row .btn {
    font-size: 10px;
    padding: 7px 9px;
  }
  .summary-unlock {
    padding: 13px 12px;
    font-size: 10px;
  }
  .summary-unlock .text-link {
    font-size: 9px;
  }
  .summary-unlock svg {
    width: 16px;
  }
  .lesson-header h1 {
    font-size: 27px;
  }
  .lesson-header p {
    font-size: 12px;
  }
  .tabs {
    gap: 20px;
  }
  .tab {
    font-size: 11px;
  }
  .compare-grid {
    grid-template-columns: 1fr;
  }
  .compare-grid > div + div {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .compare-grid pre {
    min-height: 120px;
  }
  .objective-card .check {
    display: flex;
  }
  .quiz-q h3 {
    font-size: 15px;
  }
  .revision-item {
    padding: 14px;
    gap: 10px;
  }
  .revision-item h3 {
    font-size: 12px;
  }
  .revision-item .btn {
    font-size: 10px;
    padding: 7px 9px;
  }
  .revision-item p {
    font-size: 10px;
  }
  .toolbar {
    gap: 7px;
  }
  .filter {
    font-size: 10px;
    padding: 7px 9px;
  }
  .search-field {
    max-width: none;
    flex-basis: 100%;
    margin-bottom: 5px;
  }
  .modal {
    padding: 21px;
  }
  .modal h2 {
    font-size: 20px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *:before,
  *:after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}
/* Audit upgrade: activity-based achievements and classroom guidance. */
[hidden] {
  display: none !important;
}
.achievement-section {
  margin-top: 30px;
}
.achievement-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.achievement {
  padding: 18px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--muted);
}
.achievement strong {
  display: block;
  font-size: 12px;
  margin: 9px 0 4px;
}
.achievement small {
  font-size: 10px;
  line-height: 1.7;
  display: block;
}
.achievement.earned {
  border-color: #ad9af84d;
  background: var(--purple-soft);
  color: var(--purple);
}
.common-errors {
  margin: 25px 0;
}
.common-errors h3 {
  font-size: 14px;
  color: var(--orange);
  margin: 18px 0 8px;
}
.runtime-note {
  font-size: 12px;
  color: var(--orange);
  border-left: 2px solid var(--orange);
  padding: 13px 17px;
  margin-bottom: 20px;
  background: #e8ba8f09;
}
.video-verification {
  font-size: 11px;
  color: var(--muted);
  margin: 15px 0;
  line-height: 1.8;
}
.video-missing {
  padding: 40px 25px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  text-align: center;
}
.video-missing h2 {
  font-size: 21px;
  margin: 10px;
}
.video-missing p {
  font-size: 13px;
  color: var(--muted);
  max-width: 600px;
  margin: auto;
}
.lesson-prose section h2 {
  scroll-margin-top: 20px;
}
.exercise-card [data-assess] {
  min-width: 160px;
}
.mobile-menu {
  flex-shrink: 0;
}
@media (max-width: 980px) {
  .achievement-strip {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 600px) {
  .achievement-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .achievement {
    padding: 14px;
  }
  .goal-card {
    display: flex;
  }
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .goal-card .goal-top {
    margin: 12px 0;
  }
  .goal-caption {
    margin-top: 12px;
  }
  .topbar-left {
    min-width: 0;
  }
  #breadcrumb {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .page-intro {
    align-items: flex-start;
  }
  .page-intro .btn {
    font-size: 10px;
  }
}