:root {
  --ink: #20201e;
  --muted: #70736e;
  --line: #dedfd8;
  --yellow: #f5dc42;
  --paper: #f5f5f0;
  --green: #2d6850;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}
a {
  color: inherit;
  text-underline-offset: 3px;
}
button,
input,
select,
textarea {
  font: inherit;
}
button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
  line-height: 1.4;
}
button:hover,
.button:hover {
  border-color: var(--ink);
}
button:disabled {
  opacity: 0.5;
  cursor: wait;
}
.primary {
  background: var(--yellow);
  border-color: var(--yellow);
}
.quiet {
  background: transparent;
  border: 0;
  padding: 0;
  font-size: 13px;
}
.danger {
  color: #aa2828;
}
input:not([type='radio']):not([type='checkbox']):not([type='file']),
select,
textarea {
  display: block;
  width: 100%;
  padding: 11px 12px;
  border: 1px solid #bfc3b7;
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
}
textarea {
  resize: vertical;
}
input[type='checkbox'],
input[type='radio'] {
  accent-color: #333;
}
label {
  display: block;
  margin: 12px 0 6px;
  font-weight: 500;
}
input:focus,
textarea:focus,
select:focus {
  outline: 2px solid #8b7b08;
  outline-offset: 2px;
}
h1,
h2,
h3 {
  line-height: 1.18;
  letter-spacing: -0.035em;
}
h1 {
  font-size: clamp(30px, 3.8vw, 54px);
  margin: 14px 0 26px;
}
h2 {
  font-size: 26px;
}
h3 {
  font-size: 20px;
}
p {
  margin: 0 0 16px;
}
hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 24px 0;
}
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 22px 4%;
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-decoration: none;
}
.brand img {
  width: 178px;
  height: auto;
}
.brand span {
  font-size: 9px;
  letter-spacing: 0.23em;
  color: var(--muted);
}
nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
  font-size: 13px;
}
nav a {
  text-decoration: none;
}
nav a:hover {
  text-decoration: underline;
}
main {
  max-width: 1440px;
  padding: 40px 4% 70px;
  margin: auto;
}
footer {
  padding: 22px 4%;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
}
.eyebrow {
  font-size: 11px;
  letter-spacing: 0.15em;
  font-weight: 700;
  color: var(--muted);
}
.muted {
  color: var(--muted);
}
.small {
  font-size: 13px;
}
.big {
  font-size: 64px;
  line-height: 1.1;
  letter-spacing: -0.06em;
}
.big small {
  font-size: 28px;
}
.hero {
  display: grid;
  grid-template-columns: 1fr 280px;
  align-items: center;
  gap: 70px;
  padding: 18px 0 44px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 30px;
}
.hero h1 {
  font-size: clamp(40px, 4.8vw, 68px);
}
.hero p {
  max-width: 650px;
}
.progress-card {
  padding: 30px;
  background: #eeefe7;
  border-radius: 18px;
}
progress {
  display: block;
  width: 100%;
  height: 8px;
  accent-color: var(--green);
  margin: 22px 0;
}
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.section-title > span {
  font-size: 13px;
}
.board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0 34px;
}
.tool {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 120px;
  padding: 24px;
  text-decoration: none;
}
.tool:hover {
  border-color: #999;
}
.tool strong {
  font-size: 18px;
  padding-right: 15px;
}
.arrow {
  position: absolute;
  right: 18px;
  top: 14px;
}
.days {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.day {
  padding: 26px;
}
.module {
  border-top: 1px solid var(--line);
  margin-top: 20px;
  padding-top: 14px;
}
.module-name {
  display: flex;
  align-items: center;
  gap: 14px;
}
.number {
  display: grid;
  place-items: center;
  min-width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #f4f0ce;
  font-size: 13px;
}
.lesson-link {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 0;
  font-size: 14px;
  text-decoration: none;
}
.lesson-link:hover {
  text-decoration: underline;
}
.auth {
  max-width: 490px;
  margin: 45px auto;
  padding: 38px;
}
.auth h1 {
  font-size: 32px;
}
.auth .primary {
  width: 100%;
}
.errorlist {
  color: #9b2828;
}
.notice {
  padding: 18px 22px;
  border: 1px solid #d7c878;
  background: #fff8d6;
  border-radius: 10px;
  margin-bottom: 22px;
}
.notice.error {
  background: #fff0ec;
  border-color: #dfb5a9;
}
.notice.success {
  background: #edf7ed;
  border-color: #b9d4ba;
}
.narrow {
  max-width: 850px;
  margin: auto;
}
.learn-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 270px;
  gap: 28px;
}
.learn-layout h1 {
  font-size: 36px;
}
.back {
  display: inline-block;
  margin-bottom: 20px;
  font-size: 14px;
}
.course-nav {
  padding: 20px;
  position: sticky;
  top: 20px;
  align-self: start;
  max-height: 90vh;
  overflow: auto;
  font-size: 13px;
}
.course-nav details {
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}
.course-nav a {
  display: block;
  margin: 10px 0;
  text-decoration: none;
}
.course-nav a[aria-current] {
  font-weight: bold;
  color: var(--green);
}
summary {
  cursor: pointer;
}
.reading {
  overflow: hidden;
}
.reading-section {
  padding: 30px 36px;
  overflow-wrap: anywhere;
  line-height: 1.8;
}
.reading-section p {
  margin: 0 0 18px;
  text-align: justify;
  max-width: none;
}
.reading-section li {
  margin: 9px 0;
  max-width: none;
}
.reading-section h2,
.reading-section h3 {
  margin: 30px 0 18px;
  line-height: 1.35;
}
.reading-section img {
  max-width: 100%;
  height: auto;
  width: auto;
}
.reading-section table {
  width: 100%;
  border-collapse: collapse;
}
.reading-section th,
.reading-section td {
  border: 1px solid var(--line);
  padding: 14px;
  vertical-align: top;
}
.reading-section .table-wrap {
  overflow: auto;
}
.reading-section ul,
.reading-section ol {
  padding-left: 25px;
}
.reading-section blockquote {
  padding: 12px 22px;
  border-left: 3px solid var(--yellow);
  margin-left: 0;
  background: #faf9ef;
}
.editor-note {
  padding: 20px;
  background: #faf6db;
  border-left: 3px solid #d6b733;
  margin-bottom: 25px;
}
.practice {
  padding: 26px;
  margin-top: 22px;
}
.practice h2 {
  margin-top: 0;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.question {
  padding: 25px;
  margin: 28px 0;
}
.question legend {
  font-weight: bold;
  padding: 0 10px;
  max-width: 100%;
}
.option {
  display: flex;
  gap: 14px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  align-items: flex-start;
  cursor: pointer;
}
.option input {
  margin-top: 6px;
}
.result {
  padding: 32px;
}
.table-wrap {
  overflow-x: auto;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th,
td {
  text-align: left;
  padding: 18px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
dt {
  color: var(--muted);
  font-size: 13px;
}
dd {
  margin: 4px 0 20px;
}
.credential {
  font-size: 22px;
  overflow-wrap: anywhere;
}
.calc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.editor-layout {
  display: grid;
  grid-template-columns: 235px minmax(0, 1fr);
  gap: 20px;
}
.editor-nav {
  padding: 18px;
  align-self: start;
  position: sticky;
  top: 12px;
  max-height: 90vh;
  overflow: auto;
}
.editor-nav button {
  display: block;
  width: 100%;
  text-align: left;
  margin: 6px 0;
  font-size: 12px;
  justify-content: flex-start;
}
.editor-nav button.selected {
  background: var(--yellow);
}
.editor-nav h4 {
  font-size: 12px;
  margin: 20px 0 8px;
}
.editor-main {
  padding: 24px;
  min-width: 0;
}
.editor-fields {
  margin-bottom: 20px;
}
.check {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}
.module-settings {
  margin-top: 30px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}
.quiz-edit,
.board-edit {
  border: 1px solid var(--line);
  padding: 20px;
  border-radius: 10px;
  margin: 16px 0;
}
.quiz-option {
  display: flex;
  align-items: center;
  gap: 10px;
}
.quiz-option input[type='radio'] {
  flex: 0 0 18px;
}
.revision {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.jodit-wysiwyg img {
  max-width: 100%;
  height: auto;
}
.jodit-container {
  color: #20201e;
}
button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid #a28b00;
  outline-offset: 3px;
}
[hidden] {
  display: none !important;
}
@media (min-width: 1250px) {
  .board {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
  .tool {
    padding: 22px 16px;
  }
  .tool strong {
    font-size: 16px;
  }
}
@media (max-width: 900px) {
  .top {
    align-items: flex-start;
    flex-direction: column;
  }
  nav {
    gap: 16px;
  }
  .hero {
    gap: 30px;
    grid-template-columns: 1fr 220px;
  }
  .learn-layout {
    grid-template-columns: minmax(0, 1fr) 210px;
  }
  .editor-layout {
    grid-template-columns: 190px minmax(0, 1fr);
  }
  .section-title {
    align-items: flex-start;
    flex-wrap: wrap;
  }
  .board {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 650px) {
  main {
    padding: 26px 18px 50px;
  }
  .hero,
  .days,
  .learn-layout,
  .editor-layout {
    grid-template-columns: 1fr;
  }
  .hero {
    gap: 22px;
  }
  .progress-card {
    padding: 22px;
  }
  .progress-card .big {
    font-size: 40px;
  }
  .board {
    grid-template-columns: 1fr 1fr;
  }
  .tool {
    padding: 20px 15px;
  }
  .course-nav {
    position: static;
    max-height: none;
    order: -1;
  }
  .course-nav details {
    display: none;
  }
  .course-nav > hr,
  .course-nav > a:not(:first-child) {
    display: none;
  }
  .reading-section {
    padding: 22px;
  }
  .reading-section p {
    text-align: left;
  }
  .learn-layout h1 {
    font-size: 30px;
  }
  .editor-nav {
    position: static;
    max-height: 260px;
  }
  .editor-main {
    padding: 15px;
  }
  .calc-grid {
    grid-template-columns: 1fr 1fr;
  }
  .auth {
    padding: 24px;
    margin: 15px auto;
  }
  .section-title > span {
    display: none;
  }
}

/* Keep the plan and working tools close to the first screen. */
.hero {
  padding: 0 0 24px;
  gap: 35px;
  margin-bottom: 18px;
}
.hero h1 {
  font-size: 38px;
  margin: 10px 0 14px;
}
.hero h1 br {
  display: none;
}
.hero p {
  font-size: 14px;
}
.progress-card {
  padding: 20px;
}
.progress-card .big {
  font-size: 44px;
}
.progress-card p {
  margin-bottom: 8px;
}
.hero progress {
  margin: 12px 0;
}
.module-name h3 {
  font-size: 17px;
  margin: 8px 0;
}
.day {
  padding: 20px;
}
.module {
  margin-top: 12px;
  padding-top: 10px;
}
.module > p {
  display: none;
}
.module .lesson-link {
  padding: 6px 0;
  font-size: 13px;
}
.board {
  margin-bottom: 22px;
}
@media (min-width: 950px) {
  .board {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
  .tool {
    min-height: 108px;
    padding: 22px 14px;
  }
  .tool strong {
    font-size: 15px;
  }
}
@media (max-width: 650px) {
  .hero h1 {
    font-size: 32px;
  }
}