:root {
  --learn-ink: #081b3a;
  --learn-muted: #52627a;
  --learn-paper: #f4f7fb;
  --learn-card: #ffffff;
  --learn-line: #dbe4f0;
  --learn-primary: var(--edu-color, #3357d5);
  --learn-accent: var(--edu-accent, #16a394);
  --learn-success: #087f5b;
  --learn-warning: #9a5a00;
  --learn-danger: #b42318;
  --learn-shadow: 0 18px 55px rgba(5, 32, 71, .1);
}

html { scroll-behavior: smooth; }
.learn-body { margin: 0; color: var(--learn-ink); background: var(--learn-paper); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
.learn-body *, .learn-body *::before, .learn-body *::after { box-sizing: border-box; }
.learn-body button, .learn-body input, .learn-body select, .learn-body textarea { font: inherit; }
.learn-body a { color: inherit; }
.learn-skip { position: fixed; z-index: 1000; top: .6rem; left: .6rem; padding: .7rem 1rem; color: #fff; background: #06162f; border-radius: .75rem; transform: translateY(-150%); }
.learn-skip:focus { transform: none; }

.learn-header { position: sticky; z-index: 80; top: 0; border-bottom: 1px solid rgba(219,228,240,.9); background: rgba(255,255,255,.94); backdrop-filter: blur(16px); }
.learn-header-inner { width: min(1180px, calc(100% - 2rem)); min-height: 72px; margin: 0 auto; display: flex; align-items: center; gap: 1rem; }
.learn-brand { display: inline-flex; align-items: center; gap: .7rem; color: var(--learn-ink); font-weight: 900; text-decoration: none; white-space: nowrap; }
.learn-brand img { width: 42px; height: 42px; object-fit: contain; }
.learn-brand span small { display: block; color: var(--learn-muted); font-size: .68rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.learn-nav { margin-left: auto; display: flex; align-items: center; gap: .2rem; }
.learn-nav a { min-height: 44px; padding: .65rem .78rem; display: inline-flex; align-items: center; border-radius: .75rem; color: #34435c; font-size: .88rem; font-weight: 760; text-decoration: none; }
.learn-nav a:hover, .learn-nav a:focus-visible, .learn-nav a[aria-current="page"] { color: var(--learn-primary); background: #eef3fb; }

.learn-shell { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; padding: 1.35rem 0 5rem; }
.learn-breadcrumb { margin: 0 0 1.1rem; color: var(--learn-muted); font-size: .88rem; }
.learn-breadcrumb a { color: var(--learn-primary); font-weight: 800; text-decoration: none; }
.learn-hero { position: relative; overflow: hidden; padding: clamp(1.6rem, 5vw, 4.2rem); display: grid; grid-template-columns: minmax(0,1.35fr) minmax(210px,.65fr); align-items: center; gap: 2rem; border-radius: 2rem; color: #fff; background: linear-gradient(138deg, #071a38 0%, var(--learn-primary) 72%, var(--learn-accent) 150%); box-shadow: var(--learn-shadow); }
.learn-hero::after { content: ""; position: absolute; right: -6rem; bottom: -9rem; width: 22rem; height: 22rem; border: 4.5rem solid rgba(255,255,255,.08); border-radius: 50%; }
.learn-hero-copy, .learn-logo { position: relative; z-index: 1; }
.learn-status { display: inline-flex; align-items: center; gap: .45rem; padding: .38rem .7rem; border: 1px solid rgba(255,255,255,.3); border-radius: 999px; background: rgba(255,255,255,.1); font-size: .75rem; font-weight: 900; letter-spacing: .05em; text-transform: uppercase; }
.learn-status::before { content: ""; width: .55rem; height: .55rem; border-radius: 50%; background: #6ee7b7; box-shadow: 0 0 0 .25rem rgba(110,231,183,.16); }
.learn-hero h1 { margin: .9rem 0 .75rem; font-size: clamp(2.25rem, 7vw, 5.4rem); line-height: .95; letter-spacing: -.055em; }
.learn-hero p { max-width: 720px; margin: 0; color: #eef5ff; font-size: clamp(1rem, 2vw, 1.18rem); line-height: 1.65; }
.learn-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.35rem; }
.learn-actions a { min-height: 46px; padding: .75rem 1rem; display: inline-flex; align-items: center; justify-content: center; border-radius: .85rem; color: #06162f; background: #fff; font-weight: 850; text-decoration: none; }
.learn-actions a:last-child { color: #fff; border: 1px solid rgba(255,255,255,.38); background: rgba(255,255,255,.1); }
.learn-logo { justify-self: end; width: min(250px, 100%); aspect-ratio: 1; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.25); border-radius: 2rem; background: rgba(255,255,255,.96); box-shadow: 0 22px 55px rgba(0,0,0,.18); }
.learn-logo img { width: 78%; height: 78%; object-fit: contain; }

.learn-progress-strip { position: relative; z-index: 2; margin: -1rem 1.2rem 0; padding: 1rem 1.1rem; display: grid; grid-template-columns: repeat(4,1fr); gap: .75rem; border: 1px solid var(--learn-line); border-radius: 1.3rem; background: rgba(255,255,255,.97); box-shadow: 0 14px 36px rgba(5,32,71,.09); }
.learn-stat span { display: block; color: var(--learn-muted); font-size: .72rem; font-weight: 850; letter-spacing: .04em; text-transform: uppercase; }
.learn-stat strong { display: block; margin-top: .35rem; color: var(--learn-primary); font-size: 1.5rem; line-height: 1; }
.learn-stat small { display: block; margin-top: .35rem; color: var(--learn-muted); font-size: .78rem; }

.learn-section { margin-top: 3rem; scroll-margin-top: 90px; }
.learn-section-head { max-width: 780px; margin-bottom: 1.15rem; }
.learn-section-head > span { color: var(--learn-primary); font-size: .74rem; font-weight: 900; letter-spacing: .11em; text-transform: uppercase; }
.learn-section-head h2 { margin: .35rem 0 .5rem; font-size: clamp(1.65rem, 4vw, 2.65rem); line-height: 1.08; letter-spacing: -.04em; }
.learn-section-head p { margin: 0; color: var(--learn-muted); line-height: 1.65; }
.learn-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; }
.learn-grid.three { grid-template-columns: repeat(3,minmax(0,1fr)); }
.learn-card { padding: 1.25rem; border: 1px solid var(--learn-line); border-radius: 1.25rem; background: var(--learn-card); box-shadow: 0 12px 35px rgba(5,32,71,.055); }
.learn-card h3 { margin: 0 0 .45rem; font-size: 1.15rem; }
.learn-card p { margin: 0; color: var(--learn-muted); line-height: 1.58; }
.learn-card > p + *, .learn-card > * + .learn-form { margin-top: 1rem; }
.learn-card.is-featured { color: #fff; border-color: transparent; background: linear-gradient(138deg, #071a38, var(--learn-primary)); }
.learn-card.is-featured p, .learn-card.is-featured small { color: #e7effa; }

.learn-form { display: grid; gap: .85rem; }
.learn-form-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: .8rem; }
.learn-field { display: grid; gap: .35rem; }
.learn-field span { color: #33425b; font-size: .8rem; font-weight: 820; }
.learn-field input, .learn-field select, .learn-field textarea { width: 100%; min-height: 46px; padding: .72rem .8rem; border: 1px solid #c9d5e5; border-radius: .78rem; color: var(--learn-ink); background: #fff; }
.learn-field textarea { min-height: 96px; resize: vertical; }
.learn-field input:focus, .learn-field select:focus, .learn-field textarea:focus { outline: 3px solid color-mix(in srgb, var(--learn-primary) 22%, transparent); border-color: var(--learn-primary); }
.learn-button { min-height: 46px; padding: .72rem 1rem; border: 0; border-radius: .8rem; color: #fff; background: var(--learn-primary); font-weight: 870; cursor: pointer; }
.learn-button:hover { filter: brightness(.93); }
.learn-button.secondary { color: var(--learn-primary); border: 1px solid color-mix(in srgb, var(--learn-primary) 30%, #dbe4f0); background: #fff; }
.learn-button.ghost { color: var(--learn-ink); border: 1px solid var(--learn-line); background: #f7f9fc; }
.learn-button.danger { color: var(--learn-danger); border: 1px solid #ffd0cc; background: #fff5f4; }
.learn-button:disabled { cursor: not-allowed; opacity: .55; }
.learn-button-row { display: flex; flex-wrap: wrap; gap: .65rem; }
.learn-status-line { min-height: 1.4em; color: var(--learn-success); font-size: .84rem; font-weight: 760; }

.learn-plan { display: grid; gap: .7rem; }
.learn-plan-day { padding: .95rem; border: 1px solid var(--learn-line); border-left: 4px solid var(--learn-primary); border-radius: .85rem; background: #fff; }
.learn-plan-day header { display: flex; justify-content: space-between; gap: 1rem; }
.learn-plan-day strong { color: var(--learn-primary); }
.learn-plan-day small { color: var(--learn-muted); }
.learn-plan-day p { margin: .35rem 0 0; color: var(--learn-muted); }
.learn-task-list { display: grid; gap: .65rem; }
.learn-task { padding: .8rem .9rem; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: .75rem; border: 1px solid var(--learn-line); border-radius: .8rem; background: #fff; }
.learn-task input { width: 1.2rem; height: 1.2rem; accent-color: var(--learn-primary); }
.learn-task strong, .learn-task small { display: block; }
.learn-task small { margin-top: .2rem; color: var(--learn-muted); }
.learn-task button { border: 0; color: var(--learn-danger); background: transparent; font-weight: 800; cursor: pointer; }
.learn-task.is-done strong { color: var(--learn-muted); text-decoration: line-through; }
.learn-empty { padding: 1rem; border: 1px dashed #b8c8dc; border-radius: .8rem; color: var(--learn-muted); background: #f9fbfd; text-align: center; }

.learn-tabs { display: flex; flex-wrap: wrap; gap: .55rem; margin-bottom: 1rem; }
.learn-tabs button { min-height: 42px; padding: .6rem .85rem; border: 1px solid var(--learn-line); border-radius: 999px; color: #33425b; background: #fff; font-weight: 800; cursor: pointer; }
.learn-tabs button[aria-pressed="true"], .learn-tabs button.is-active { color: #fff; border-color: var(--learn-primary); background: var(--learn-primary); }
.learn-module-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: .8rem; }
.learn-module { min-height: 150px; padding: 1rem; display: flex; flex-direction: column; align-items: flex-start; border: 1px solid var(--learn-line); border-radius: 1rem; background: #fff; }
.learn-module span { color: var(--learn-primary); font-size: .72rem; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.learn-module strong { margin-top: .4rem; font-size: 1.05rem; }
.learn-module p { margin: .35rem 0 .8rem; color: var(--learn-muted); font-size: .88rem; line-height: 1.5; }
.learn-module button { margin-top: auto; border: 0; padding: 0; color: var(--learn-primary); background: transparent; font-weight: 850; cursor: pointer; }
.learn-module[aria-current="true"] { border-color: var(--learn-primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--learn-primary) 14%, transparent); }
.learn-lesson { padding: 1.35rem; border: 1px solid var(--learn-line); border-radius: 1.2rem; background: #fff; }
.learn-lesson h3 { margin: 0 0 .7rem; font-size: 1.35rem; }
.learn-lesson p { color: var(--learn-muted); line-height: 1.7; }
.learn-lesson .learn-example { padding: .95rem; border-left: 4px solid var(--learn-accent); border-radius: .45rem .85rem .85rem .45rem; color: var(--learn-ink); background: #f3f8fb; }
.learn-source { padding: .85rem; border: 1px solid #d6e6db; border-radius: .8rem; color: #28513b; background: #f1fbf4; font-size: .82rem; line-height: 1.55; }

.learn-flashcard { min-height: 250px; padding: 1.7rem; display: grid; place-items: center; border: 1px solid var(--learn-line); border-radius: 1.4rem; background: linear-gradient(145deg,#fff,#f0f5fb); text-align: center; }
.learn-flashcard small { color: var(--learn-primary); font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.learn-flashcard h3 { margin: .65rem 0; font-size: clamp(1.8rem,5vw,3.1rem); }
.learn-flashcard p { max-width: 520px; margin: 0; color: var(--learn-muted); font-size: 1.05rem; }
.learn-flashcard [hidden] { display: none; }
.learn-quiz { display: grid; gap: 1rem; }
.learn-question { padding: 1rem; border: 1px solid var(--learn-line); border-radius: 1rem; background: #fff; }
.learn-question legend { padding: 0 .25rem; font-weight: 850; line-height: 1.45; }
.learn-choice { margin-top: .55rem; padding: .65rem .7rem; display: flex; align-items: flex-start; gap: .55rem; border: 1px solid #e1e7f0; border-radius: .7rem; cursor: pointer; }
.learn-choice:hover { background: #f6f8fc; }
.learn-choice input { margin-top: .15rem; accent-color: var(--learn-primary); }
.learn-feedback { margin-top: .65rem; padding: .65rem .75rem; border-radius: .65rem; font-size: .88rem; line-height: 1.5; }
.learn-feedback.is-correct { color: #075f45; background: #e9f9f2; }
.learn-feedback.is-wrong { color: #8a2c25; background: #fff0ef; }
.learn-score { padding: 1rem; border-radius: 1rem; color: #fff; background: linear-gradient(130deg,var(--learn-primary),var(--learn-accent)); }
.learn-score strong { display: block; font-size: 1.8rem; }

.learn-timeline { position: relative; display: grid; gap: .8rem; }
.learn-timeline::before { content: ""; position: absolute; top: .5rem; bottom: .5rem; left: 1rem; width: 2px; background: var(--learn-line); }
.learn-event { position: relative; margin-left: 2.4rem; padding: 1rem; border: 1px solid var(--learn-line); border-radius: 1rem; background: #fff; }
.learn-event::before { content: ""; position: absolute; left: -1.95rem; top: 1.25rem; width: .8rem; height: .8rem; border: 3px solid #fff; border-radius: 50%; background: var(--learn-primary); box-shadow: 0 0 0 2px var(--learn-primary); }
.learn-event time { color: var(--learn-primary); font-weight: 900; }
.learn-event h3 { margin: .25rem 0 .4rem; }
.learn-event p { margin: 0; color: var(--learn-muted); line-height: 1.55; }
.learn-event dl { margin: .8rem 0 0; display: grid; gap: .5rem; }
.learn-event dt { font-size: .74rem; font-weight: 900; letter-spacing: .05em; text-transform: uppercase; }
.learn-event dd { margin: 0; color: var(--learn-muted); line-height: 1.5; }

.learn-map-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: .8rem; }
.learn-place { padding: 1rem; border: 1px solid var(--learn-line); border-radius: 1rem; background: #fff; }
.learn-place > span { display: inline-grid; place-items: center; width: 2.4rem; height: 2.4rem; border-radius: .75rem; color: #fff; background: var(--learn-primary); font-weight: 900; }
.learn-place h3 { margin: .65rem 0 .35rem; }
.learn-place p { margin: 0; color: var(--learn-muted); line-height: 1.5; }
.learn-place dl { margin: .7rem 0 0; }
.learn-place dt { color: var(--learn-muted); font-size: .72rem; font-weight: 800; text-transform: uppercase; }
.learn-place dd { margin: .18rem 0 .5rem; font-weight: 760; }

.learn-trust { padding: 1.1rem; display: grid; grid-template-columns: auto 1fr; gap: .9rem; border: 1px solid #cfe0f3; border-radius: 1rem; background: #eef6ff; }
.learn-trust > span { display: grid; place-items: center; width: 2.4rem; height: 2.4rem; border-radius: 50%; color: #fff; background: var(--learn-primary); font-weight: 900; }
.learn-trust strong { display: block; }
.learn-trust p { margin: .25rem 0 0; color: var(--learn-muted); font-size: .88rem; line-height: 1.55; }
.learn-footer { padding: 2rem 0; color: #dbe7f7; background: #06162f; }
.learn-footer-inner { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; display: flex; justify-content: space-between; gap: 1.5rem; }
.learn-footer p { margin: 0; max-width: 650px; line-height: 1.55; }
.learn-footer a { color: #fff; font-weight: 800; }

@media (max-width: 860px) {
  .learn-header-inner { min-height: 64px; }
  .learn-brand span { font-size: .85rem; }
  .learn-brand span small { display: none; }
  .learn-nav a { padding: .6rem; font-size: .8rem; }
  .learn-nav a:nth-child(2) { display: none; }
  .learn-hero { grid-template-columns: 1fr; }
  .learn-logo { justify-self: start; width: 145px; border-radius: 1.3rem; }
  .learn-progress-strip { grid-template-columns: repeat(2,1fr); }
  .learn-grid, .learn-grid.three, .learn-module-grid, .learn-map-grid { grid-template-columns: 1fr; }
  .learn-form-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .learn-shell, .learn-header-inner, .learn-footer-inner { width: min(100% - 1rem, 1180px); }
  .learn-header-inner { gap: .4rem; }
  .learn-brand { gap: .35rem; }
  .learn-brand img { width: 36px; height: 36px; }
  .learn-nav { gap: 0; }
  .learn-nav a { min-height: 44px; padding: .5rem; }
  .learn-nav a:nth-child(3) { display: none; }
  .learn-hero { padding: 1.35rem; border-radius: 1.35rem; }
  .learn-hero h1 { font-size: clamp(2.2rem,15vw,3.5rem); }
  .learn-actions { display: grid; }
  .learn-progress-strip { margin: .75rem 0 0; }
  .learn-task { grid-template-columns: auto 1fr; }
  .learn-task button { grid-column: 2; justify-self: start; }
  .learn-footer-inner { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}