:root {
  --ink: #142c29;
  --green: #28715f;
  --lime: #dff56b;
  --paper: #f6f2e9;
  --card: #fffdf8;
  --muted: #68746f;
  --line: #ddd8cc;
  --orange: #f07d55;
  --red: #b95843;
  --shadow: 0 20px 55px rgba(17, 46, 42, 0.1);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "DM Sans", sans-serif;
}
.side {
  position: fixed;
  inset: 0 auto 0 0;
  width: 245px;
  background: var(--ink);
  color: white;
  padding: 26px 18px;
  display: flex;
  flex-direction: column;
  z-index: 10;
}
.logo {
  display: flex;
  align-items: center;
  gap: 11px;
  color: white;
  text-decoration: none;
  font-weight: 700;
  padding: 0 8px 28px;
}
.logo b {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--lime);
  color: var(--ink);
  display: grid;
  place-items: center;
  font: 700 23px Fraunces;
}
.logo span {
  line-height: 1.1;
}
.logo small {
  display: block;
  color: #a8bcb7;
  font-size: 10px;
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.side nav {
  display: grid;
  gap: 7px;
}
.nav {
  border: 0;
  background: transparent;
  color: #c4d0cd;
  text-align: left;
  border-radius: 11px;
  padding: 12px;
  display: flex;
  gap: 11px;
  align-items: center;
  font-weight: 600;
}
.nav:hover,
.nav.active {
  background: #21423d;
  color: white;
}
.nav i {
  margin-left: auto;
  background: var(--orange);
  color: white;
  border-radius: 99px;
  min-width: 20px;
  text-align: center;
  font-size: 10px;
  font-style: normal;
  padding: 2px 5px;
}
.side-note {
  margin-top: auto;
  background: #21423d;
  border-radius: 14px;
  padding: 15px;
}
.side-note strong {
  color: var(--lime);
  font-size: 12px;
}
.side-note p {
  font-size: 11px;
  color: #b8c8c4;
  margin-bottom: 0;
}
.mobile-head {
  display: none;
}
.app {
  margin-left: 245px;
  min-height: 100vh;
  padding: 42px clamp(24px, 5vw, 70px);
}
.view {
  display: none;
  max-width: 1250px;
  margin: auto;
}
.view.active {
  display: block;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--green);
  font-size: 11px;
  font-weight: 700;
}
h1,
h2 {
  font-family: Fraunces, serif;
  letter-spacing: -0.03em;
}
.welcome {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
}
.welcome h1,
.page-head h1 {
  font-size: clamp(45px, 6vw, 76px);
  line-height: 0.95;
  margin: 14px 0;
}
.welcome h1 em {
  font-style: normal;
  color: var(--green);
}
.welcome p,
.page-head p {
  color: var(--muted);
  font-size: 17px;
}
.master-ring {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  align-content: center;
  background: conic-gradient(var(--lime) 0%, #e6e1d6 0);
  border: 10px solid white;
  box-shadow: var(--shadow);
}
.master-ring strong {
  font: 700 36px Fraunces;
}
.master-ring span {
  font-size: 11px;
  color: var(--muted);
}
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 35px 0;
}
.stats article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
}
.stats span,
.stats small {
  display: block;
  color: var(--muted);
  font-size: 11px;
}
.stats strong {
  font: 700 30px Fraunces;
  display: block;
  margin: 8px 0;
}
.dash-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 14px;
}
.today-card,
.weak-card {
  border-radius: 20px;
  padding: 28px;
}
.today-card {
  background: var(--lime);
}
.today-card h2 {
  font-size: 34px;
  margin: 10px 0;
}
.weak-card {
  background: var(--card);
  border: 1px solid var(--line);
}
.cta {
  border: 0;
  background: var(--ink);
  color: white;
  border-radius: 11px;
  padding: 12px 17px;
  font-weight: 700;
}
.card-head,
.roadmap-head,
.page-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
}
.card-head button,
.roadmap-head button {
  border: 0;
  background: none;
  color: var(--green);
  font-weight: 700;
}
.weak-item {
  display: grid;
  grid-template-columns: 1fr 90px;
  gap: 10px;
  margin: 16px 0;
  font-size: 13px;
}
.bar {
  height: 7px;
  background: #ebe7de;
  border-radius: 8px;
  grid-column: 1/-1;
}
.bar i {
  display: block;
  height: 100%;
  background: var(--orange);
  border-radius: 8px;
}
.roadmap-head {
  margin: 55px 0 20px;
}
.roadmap-head h2 {
  font-size: 40px;
  margin: 6px 0;
}
.module-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.module-card {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 18px;
  padding: 20px;
}
.module-card .num {
  font: 700 28px Fraunces;
  color: var(--green);
}
.module-card h3 {
  min-height: 44px;
}
.module-card small {
  color: var(--muted);
}
.module-progress {
  height: 6px;
  background: #ebe7df;
  border-radius: 8px;
  margin-top: 17px;
}
.module-progress i {
  display: block;
  height: 100%;
  background: var(--green);
  border-radius: 8px;
}
.page-head {
  margin-bottom: 35px;
}
.filter {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.filter button,
.outline {
  border: 1px solid var(--line);
  background: white;
  border-radius: 99px;
  padding: 8px 13px;
}
.filter button.active {
  background: var(--ink);
  color: white;
}
.curr-module {
  margin-bottom: 38px;
}
.curr-module h2 {
  font-size: 32px;
}
.lesson-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.lesson-row {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 16px;
  display: grid;
  grid-template-columns: 38px 1fr auto;
  gap: 12px;
  align-items: center;
  text-align: left;
}
.lesson-row .lesson-index {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: #eeeadf;
  font-weight: 700;
}
.lesson-row strong,
.lesson-row small {
  display: block;
}
.lesson-row small {
  color: var(--muted);
  margin-top: 3px;
}
.lesson-row .mastery {
  font-weight: 700;
  color: var(--green);
}
.lesson-row.done .lesson-index {
  background: var(--green);
  color: white;
}
.lesson-row.weak {
  border-color: var(--orange);
}
.empty-card,
.mock-start {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 40px;
  text-align: center;
}
.review-card,
.mistake-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  margin: 10px 0;
}
.mistake-card b {
  color: var(--red);
}
.clock {
  font: 700 58px Fraunces;
  color: var(--green);
}
.mock-start ul {
  display: inline-block;
  text-align: left;
  color: var(--muted);
  line-height: 1.9;
}
.lesson-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 26, 23, 0.72);
  backdrop-filter: blur(7px);
  z-index: 30;
  overflow: auto;
  padding: 20px;
}
.lesson-reader {
  position: relative;
  max-width: 880px;
  margin: 20px auto;
  background: var(--paper);
  border-radius: 24px;
  padding: clamp(26px, 5vw, 58px);
}
.reader-close {
  position: absolute;
  right: 18px;
  top: 14px;
  border: 0;
  background: none;
  font-size: 32px;
}
.lesson-reader h1 {
  font-size: clamp(40px, 6vw, 64px);
  margin: 12px 0;
}
.learn-path{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 26px}.learn-path span{padding:7px 10px;border-radius:20px;background:#edf0ea;color:#66736f;font-size:11px;font-weight:700}.learn-path .active{background:#dff56b;color:#17312e}.zero-block,.solve-block{display:grid!important;grid-template-columns:42px 1fr;gap:15px}.block-number{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:#17312e;color:#dff56b;font-size:11px;font-weight:700}.deep-points{list-style:none;padding:0}.deep-points li{display:grid;grid-template-columns:90px 1fr;gap:13px;padding:12px 0;border-bottom:1px solid #e3e8e0}.deep-points li b{color:#71840f;font-size:12px}.deep-points li span{line-height:1.55}.concept-table{border:1px solid #dde4da;border-radius:12px;overflow:hidden}.concept-table div{display:grid;grid-template-columns:150px 1fr}.concept-table div+div{border-top:1px solid #dde4da}.concept-table b,.concept-table span{padding:11px 13px}.concept-table b{background:#f1f4e9}.active-recall{border:2px dashed #9cb238;background:#faffdf}@media(max-width:620px){.concept-table div{grid-template-columns:1fr}.concept-table b{padding-bottom:4px}.concept-table span{padding-top:4px}.deep-points li{grid-template-columns:1fr;gap:4px}.zero-block,.solve-block{grid-template-columns:1fr}}
.lesson-lead {
  font-size: 19px;
  color: var(--muted);
}
.learn-block {
  margin-top: 34px;
}
.learn-block h3 {
  color: var(--green);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.learn-block ul {
  line-height: 1.8;
  padding-left: 20px;
}
.memory-box,
.trap-box {
  border-radius: 15px;
  padding: 20px;
}
.memory-box {
  background: var(--lime);
}
.trap-box {
  background: var(--ink);
  color: white;
}
.trap-box b {
  color: var(--lime);
}
.lesson-check {
  border: 2px solid var(--ink);
  border-radius: 16px;
  padding: 20px;
}
.lesson-check button {
  display: block;
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  background: white;
  padding: 11px;
  border-radius: 9px;
  margin: 7px 0;
}
.lesson-check button.correct {
  background: #dff0dc;
}
.lesson-check button.wrong {
  background: #f5d8cf;
}
.feedback {
  padding: 13px;
  margin-top: 10px;
  background: #eee8dd;
  border-radius: 9px;
}
.reader-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 28px;
  gap: 10px;
}
.reader-actions button {
  border: 0;
  border-radius: 10px;
  padding: 12px 15px;
  font-weight: 700;
}
.finish {
  background: var(--green);
  color: white;
}
.mock-q {
  max-width: 760px;
  margin: auto;
  text-align: left;
}
.mock-meta {
  display: flex;
  justify-content: space-between;
}
.mock-options button {
  width: 100%;
  display: block;
  text-align: left;
  margin: 8px 0;
  padding: 13px;
  border: 1px solid var(--line);
  background: white;
  border-radius: 10px;
}
.mock-result {
  text-align: center;
}
.mock-result strong {
  font: 700 70px Fraunces;
  color: var(--green);
}
@media (max-width: 900px) {
  .side {
    transform: translateX(-100%);
    transition: 0.25s;
  }
  .side.open {
    transform: none;
  }
  .mobile-head {
    display: flex;
    position: sticky;
    top: 0;
    height: 58px;
    background: rgba(246, 242, 233, 0.94);
    backdrop-filter: blur(10px);
    z-index: 20;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    border-bottom: 1px solid var(--line);
  }
  .mobile-head button {
    border: 0;
    background: none;
    font-size: 23px;
  }
  .mobile-head a {
    color: var(--ink);
    font-weight: 700;
    text-decoration: none;
  }
  .app {
    margin-left: 0;
    padding: 28px 16px;
  }
  .stats {
    grid-template-columns: 1fr 1fr;
  }
  .dash-grid {
    grid-template-columns: 1fr;
  }
  .module-row {
    grid-template-columns: 1fr 1fr;
  }
  .lesson-list {
    grid-template-columns: 1fr;
  }
  .welcome {
    align-items: flex-start;
  }
  .master-ring {
    width: 125px;
    height: 125px;
    flex: none;
  }
}
@media (max-width: 540px) {
  .welcome {
    display: block;
  }
  .master-ring {
    margin-top: 25px;
  }
  .stats {
    gap: 8px;
  }
  .stats article {
    padding: 13px;
  }
  .module-row {
    grid-template-columns: 1fr;
  }
  .page-head {
    display: block;
  }
  .filter {
    margin-top: 20px;
  }
  .lesson-overlay {
    padding: 0;
  }
  .lesson-reader {
    margin: 0;
    min-height: 100vh;
    border-radius: 0;
  }
  .reader-actions {
    flex-direction: column;
  }
  .reader-actions button {
    width: 100%;
  }
}