:root {
  --ink: #09111f;
  --navy: #020735;
  --navy-2: #08124f;
  --blue: #549aef;
  --cyan: #6ee7f9;
  --green: #31c48d;
  --yellow: #f4d23c;
  --pink: #ff4da6;
  --violet: #8b5cf6;
  --bg: #f7f8fa;
  --card: #ffffff;
  --line: #dbe3ef;
  --muted: #607089;
  --soft: #eef4fb;
  --danger: #dc2626;
  --radius: 8px;
  --shadow: 0 22px 60px rgba(9, 17, 31, .14);
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
}

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

button,
input,
select,
textarea {
  font: inherit;
  letter-spacing: 0;
}

button {
  cursor: pointer;
}

img {
  max-width: 100%;
}

.public-body {
  background:
    linear-gradient(135deg, rgba(2, 7, 53, .96), rgba(5, 17, 43, .92) 40%, rgba(10, 56, 74, .9)),
    radial-gradient(circle at 80% 20%, rgba(49, 196, 141, .35), transparent 32%);
  color: white;
}

.public-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(360px, .85fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
  padding: clamp(20px, 4vw, 56px);
  max-width: 1480px;
  margin: 0 auto;
}

.public-shell.single {
  grid-template-columns: minmax(320px, 780px);
  justify-content: center;
}

.hero-panel {
  display: grid;
  gap: 36px;
  align-content: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 46px;
}

.brand img {
  width: 46px;
  height: 46px;
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(84, 154, 239, .25);
}

.brand strong {
  display: block;
  font-size: 18px;
  line-height: 1.1;
}

.brand small {
  display: block;
  color: rgba(255, 255, 255, .62);
}

.app-body .brand small {
  color: #8ea0bb;
}

.brand.compact {
  margin-bottom: 24px;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 9px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(52px, 9vw, 116px);
  line-height: .9;
  color: white;
}

.hero-copy p {
  max-width: 600px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, .78);
  font-size: clamp(20px, 3vw, 34px);
  font-weight: 650;
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 860px;
}

.demo-card {
  margin: 0;
}

.demo-card button {
  width: 100%;
  min-height: 154px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius);
  padding: 18px;
  text-align: left;
  background: rgba(255, 255, 255, .08);
  color: white;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.demo-card button:hover {
  transform: translateY(-3px);
  border-color: rgba(110, 231, 249, .65);
  background: rgba(255, 255, 255, .13);
}

.demo-card span,
.demo-card strong,
.demo-card small {
  display: block;
}

.demo-card span {
  color: var(--yellow);
  font-weight: 800;
}

.demo-card strong {
  margin: 12px 0;
  overflow-wrap: anywhere;
  font-size: 15px;
}

.demo-card small {
  color: rgba(255, 255, 255, .68);
}

.auth-preview {
  display: grid;
  gap: 18px;
}

.auth-card {
  background: rgba(255, 255, 255, .95);
  color: var(--ink);
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(20px, 3vw, 32px);
}

.auth-card.wide {
  width: min(780px, 100%);
}

.form-head h2,
.panel h2,
.price-card h2,
.course-hero h2,
.passport h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.1;
}

.auth-card label,
.stacked-form label,
.assessment-form label {
  display: grid;
  gap: 8px;
  color: #27364c;
  font-weight: 750;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 13px;
  background: #ffffff;
  color: var(--ink);
  outline: none;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(84, 154, 239, .16);
}

.auth-card form,
.stacked-form,
.assessment-form {
  display: grid;
  gap: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.primary-btn,
.primary-mini,
.mini-btn,
.ghost-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: var(--radius);
  border: 0;
  padding: 10px 16px;
  font-weight: 850;
}

.primary-btn,
.primary-mini {
  background: linear-gradient(135deg, var(--blue), var(--green));
  color: white;
  box-shadow: 0 14px 30px rgba(84, 154, 239, .28);
}

.primary-mini,
.mini-btn {
  min-height: 36px;
  padding: 8px 12px;
  font-size: 13px;
}

.mini-btn {
  background: var(--soft);
  color: var(--navy);
  border: 1px solid var(--line);
}

.ghost-btn {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, .12);
  background: rgba(255, 255, 255, .06);
  color: #d9e6fb;
}

.text-link {
  color: var(--blue);
  font-weight: 800;
}

.product-preview {
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(3, 9, 39, .72);
  box-shadow: var(--shadow);
}

.preview-top {
  display: flex;
  gap: 8px;
  padding: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}

.preview-top span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--pink);
}

.preview-top span:nth-child(2) {
  background: var(--yellow);
}

.preview-top span:nth-child(3) {
  background: var(--green);
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: 16px;
}

.preview-metric,
.preview-chart,
.preview-list {
  min-height: 132px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .08);
  padding: 15px;
}

.preview-metric small,
.preview-metric em,
.preview-list span {
  display: block;
  color: rgba(255, 255, 255, .68);
  font-style: normal;
}

.preview-metric strong {
  display: block;
  margin: 8px 0;
  font-size: 42px;
  color: white;
}

.preview-metric.green strong {
  color: var(--green);
}

.preview-chart {
  display: grid;
  place-items: center;
}

.preview-list {
  display: grid;
  align-content: center;
  gap: 8px;
}

.app-shell {
  display: grid;
  grid-template-columns: 272px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding: 26px 18px;
  background:
    linear-gradient(180deg, var(--navy), #0b1733 72%, #0d2f35);
  color: white;
}

.nav {
  display: grid;
  gap: 6px;
}

.nav a {
  min-height: 42px;
  display: flex;
  align-items: center;
  border-radius: var(--radius);
  padding: 10px 12px;
  color: #d9e6fb;
  font-weight: 760;
}

.nav a:hover,
.nav a.active {
  background: rgba(255, 255, 255, .1);
  color: white;
}

.logout-form {
  margin-top: auto;
}

.main {
  min-width: 0;
  padding: clamp(18px, 3vw, 34px);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 24px;
}

.topbar h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 52px);
  line-height: 1;
}

.topbar p {
  max-width: 760px;
  margin: 10px 0 0;
  color: var(--muted);
}

.user-chip {
  min-width: 190px;
  display: grid;
  gap: 2px;
  justify-items: end;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
  padding: 10px 12px;
}

.user-chip span {
  font-weight: 850;
}

.user-chip small {
  color: var(--muted);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(150px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.metric,
.panel,
.module-card,
.course-hero,
.lesson-panel,
.passport {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: 0 12px 28px rgba(9, 17, 31, .06);
}

.metric {
  min-height: 128px;
  display: grid;
  align-content: space-between;
  padding: 16px;
  overflow: hidden;
  position: relative;
}

.metric::after {
  content: "";
  position: absolute;
  right: -24px;
  top: -24px;
  width: 82px;
  height: 82px;
  border-radius: 50%;
  opacity: .18;
  background: var(--blue);
}

.metric-green::after {
  background: var(--green);
}

.metric-yellow::after {
  background: var(--yellow);
}

.metric-pink::after {
  background: var(--pink);
}

.metric-violet::after {
  background: var(--violet);
}

.metric span {
  color: var(--muted);
  font-weight: 800;
}

.metric strong {
  display: block;
  margin: 9px 0 5px;
  font-size: clamp(25px, 4vw, 38px);
  line-height: 1;
}

.metric small,
.muted {
  color: var(--muted);
}

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

.align-start {
  align-items: start;
}

.panel {
  padding: 20px;
}

.panel.wide-panel {
  max-width: 1120px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}

.panel-head h2,
.panel-head h3 {
  margin: 0;
}

.dark-panel {
  background:
    linear-gradient(135deg, #06104a, #0c3550 58%, #0d4d46);
  color: white;
  border-color: rgba(255, 255, 255, .12);
}

.dark-panel p,
.dark-panel .muted {
  color: rgba(255, 255, 255, .72);
}

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

.insight-list article {
  display: grid;
  grid-template-columns: 12px 1fr;
  gap: 10px;
  align-items: start;
}

.insight-list span {
  width: 10px;
  height: 10px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--yellow);
}

.insight-list p {
  margin: 0;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 13px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

td small {
  display: block;
  color: var(--muted);
  margin-top: 2px;
}

td a {
  color: var(--navy);
  font-weight: 850;
}

.pill {
  display: inline-flex;
  min-height: 25px;
  align-items: center;
  border-radius: 999px;
  padding: 4px 9px;
  background: var(--soft);
  color: var(--navy);
  font-size: 12px;
  font-weight: 850;
}

.pill-success {
  background: rgba(49, 196, 141, .13);
  color: #087a54;
}

.pill-warning {
  background: rgba(244, 210, 60, .2);
  color: #8a6b00;
}

.progress {
  width: 100%;
  height: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: #e7edf5;
}

.progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--blue), var(--green));
}

.skill-bars {
  display: grid;
  gap: 14px;
}

.skill-row {
  display: grid;
  gap: 8px;
}

.skill-row > div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.badge-chip {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  border-radius: 999px;
  padding: 7px 12px;
  background: linear-gradient(135deg, rgba(244, 210, 60, .25), rgba(49, 196, 141, .16));
  color: var(--navy);
  font-weight: 850;
  border: 1px solid rgba(49, 196, 141, .22);
}

.course-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 24px;
  align-items: center;
  padding: 24px;
  margin-bottom: 18px;
  background:
    linear-gradient(135deg, rgba(84, 154, 239, .12), rgba(49, 196, 141, .08)),
    white;
}

.course-hero p {
  margin: 12px 0 0;
  color: var(--muted);
}

.course-progress strong {
  display: block;
  margin-bottom: 10px;
  font-size: 44px;
  line-height: 1;
}

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

.module-card {
  display: grid;
  gap: 16px;
  padding: 20px;
}

.module-card h3 {
  margin: 0;
  font-size: 22px;
}

.module-card p {
  margin: 8px 0 0;
  color: var(--muted);
}

.lesson-list,
.side-lessons {
  display: grid;
  gap: 8px;
}

.lesson-list a,
.side-lessons a {
  min-height: 48px;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 9px 10px;
  background: white;
}

.lesson-list a.done,
.side-lessons a.active {
  border-color: rgba(49, 196, 141, .42);
  background: rgba(49, 196, 141, .08);
}

.lesson-list small {
  color: var(--muted);
}

.lesson-layout {
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: 18px;
}

.lesson-side {
  position: sticky;
  top: 18px;
  align-self: start;
}

.back-link {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--blue);
  font-weight: 850;
}

.lesson-panel {
  padding: clamp(20px, 3vw, 32px);
}

.lesson-panel h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.05;
}

.lead {
  max-width: 820px;
  margin: 14px 0 24px;
  color: var(--muted);
  font-size: 18px;
}

.lesson-content {
  display: grid;
  gap: 18px;
  font-size: 17px;
}

.example-box,
.prompt-box,
.feedback-box {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--soft);
  padding: 16px;
}

.prompt-box div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.prompt-box code {
  display: block;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 14px;
  line-height: 1.5;
}

.inner-panel {
  margin-top: 20px;
  box-shadow: none;
}

.quiz-block {
  display: grid;
  gap: 8px;
}

.quiz-block h4 {
  margin: 0;
}

.radio-card {
  display: grid;
  grid-template-columns: 20px 1fr;
  align-items: center;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  background: white;
  color: var(--ink);
}

.question-card {
  display: grid;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  background: white;
  position: relative;
}

.question-card h3 {
  margin: 0;
  padding-left: 44px;
}

.question-index {
  position: absolute;
  left: 18px;
  top: 18px;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--navy);
  color: white;
  font-weight: 900;
}

.chat-shell {
  height: calc(100vh - 160px);
  min-height: 560px;
  display: grid;
  grid-template-rows: 1fr auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
  overflow: hidden;
  box-shadow: 0 12px 28px rgba(9, 17, 31, .06);
}

.chat-history {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 20px;
  overflow: auto;
}

.chat-message {
  max-width: min(760px, 86%);
  border-radius: var(--radius);
  padding: 12px 14px;
  background: var(--soft);
}

.chat-message span {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
  text-transform: uppercase;
}

.chat-message p {
  margin: 0;
}

.chat-message.user {
  justify-self: end;
  background: linear-gradient(135deg, var(--blue), var(--green));
  color: white;
}

.chat-message.user span {
  color: rgba(255, 255, 255, .75);
}

.chat-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  padding: 14px;
  border-top: 1px solid var(--line);
  background: #fbfdff;
}

.passport {
  padding: clamp(22px, 4vw, 34px);
}

.passport-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.legal-note {
  color: var(--muted);
  font-size: 13px;
}

.detail-list {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 10px 16px;
  margin: 0;
}

.detail-list dt {
  color: var(--muted);
  font-weight: 800;
}

.detail-list dd {
  margin: 0;
}

.pricing-grid,
.prompt-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 18px;
}

.price-card h2 {
  margin: 8px 0 12px;
}

.checkline {
  display: grid;
  grid-template-columns: 18px 1fr;
  align-items: center;
  gap: 9px;
  font-weight: 700;
}

.checkline input {
  width: 18px;
}

.flash,
.public-flash {
  border-radius: var(--radius);
  padding: 12px 14px;
  background: rgba(49, 196, 141, .13);
  color: #087a54;
  border: 1px solid rgba(49, 196, 141, .22);
  margin-bottom: 18px;
}

.flash-error {
  background: rgba(220, 38, 38, .1);
  color: #a20f0f;
  border-color: rgba(220, 38, 38, .2);
}

.public-flash {
  position: fixed;
  left: 20px;
  right: 20px;
  top: 20px;
  z-index: 10;
  margin: 0 auto;
  max-width: 680px;
  background: white;
}

.footer {
  margin-top: 34px;
  color: var(--muted);
  font-size: 13px;
}

.danger-panel {
  border-color: rgba(220, 38, 38, .24);
}

@media (max-width: 1180px) {
  .public-shell,
  .app-shell,
  .grid-2,
  .lesson-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: relative;
    height: auto;
  }

  .nav {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }

  .logout-form {
    margin-top: 0;
  }

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

  .lesson-side {
    position: static;
  }
}

@media (max-width: 780px) {
  .public-shell,
  .main {
    padding: 16px;
  }

  .demo-grid,
  .preview-grid,
  .form-grid,
  .module-grid,
  .pricing-grid,
  .prompt-grid,
  .metrics-grid,
  .course-hero {
    grid-template-columns: 1fr;
  }

  .topbar,
  .passport-head,
  .panel-head {
    flex-direction: column;
    align-items: stretch;
  }

  .user-chip {
    justify-items: start;
  }

  .chat-form {
    grid-template-columns: 1fr;
  }

  .detail-list {
    grid-template-columns: 1fr;
  }

  .lesson-list a,
  .side-lessons a {
    grid-template-columns: 26px minmax(0, 1fr);
  }

  .lesson-list small {
    grid-column: 2;
  }
}