:root { color-scheme: light; --learn-primary: #4260dc; --learn-ink: #17203f; --learn-muted: #59657b; --learn-border: #dfe5ef; }
* { box-sizing: border-box; }
body { margin: 0; background: #f5f7fc; color: var(--learn-ink); font: 15px/1.6 "Segoe UI", Arial, sans-serif; }
button, input, select, textarea { font: inherit; }
button, a, input, select, summary { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; border: 1px solid #b9c4d8; border-radius: 8px; padding: 10px 16px; background: white; color: var(--learn-ink); font-weight: 600; }
button:hover:not(:disabled) { background: #edf1ff; border-color: var(--learn-primary); }
button:disabled { cursor: not-allowed; opacity: .55; }
button.learn-primary { background: var(--learn-primary); border-color: var(--learn-primary); color: white; }
button.learn-primary:hover:not(:disabled) { background: #304bc1; }
:focus-visible { outline: 3px solid #b05a00; outline-offset: 4px; }
[hidden] { display: none !important; }
h1, h2, h3, h4, p { margin-top: 0; }
h1 { font-size: clamp(27px, 3vw, 38px); line-height: 1.25; margin-bottom: 12px; letter-spacing: -.9px; }
h2 { font-size: 26px; line-height: 1.3; margin-bottom: 8px; }
h3 { font-size: 20px; line-height: 1.4; margin-bottom: 12px; }
h4 { margin-bottom: 8px; }
p { margin-bottom: 16px; }
input, select { width: 100%; min-width: 0; border: 1px solid #a9b6cd; border-radius: 7px; background: white; padding: 11px 12px; color: var(--learn-ink); }
input:disabled, select:disabled { opacity: 1; background: #f2f5fb; color: #485671; }
input[aria-invalid="true"], select[aria-invalid="true"] { border: 2px solid #a22635; }
label { display: block; font-weight: 600; margin-bottom: 6px; }
summary { cursor: pointer; font-weight: 600; }
.learn-header { min-height: 78px; background: white; border-bottom: 1px solid var(--learn-border); display: flex; justify-content: space-between; align-items: center; padding: 16px max(24px, calc((100vw - 1440px) / 2)); gap: 16px; }
.learn-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--learn-ink); font-size: 23px; font-weight: 750; }
.learn-brand small { font-size: 15px; font-weight: 500; border-left: 1px solid var(--learn-border); margin-left: 10px; padding-left: 14px; }
.learn-badge { display: inline-block; background: #edf1ff; color: #334aa7; padding: 4px 10px; border-radius: 5px; font-size: 12px; font-weight: 700; flex-shrink: 0; }
.learn-main { max-width: 1440px; padding: 32px 24px; margin: auto; }
.learn-intro { display: flex; justify-content: space-between; align-items: center; gap: 40px; margin-bottom: 12px; }
.learn-intro p:not(.learn-eyebrow) { color: var(--learn-muted); }
.learn-eyebrow { font-weight: 700; font-size: 12px; letter-spacing: 1.5px; color: var(--learn-primary); margin-bottom: 12px; text-transform: uppercase; }
.learn-progress-box { min-width: 235px; font-size: 14px; }
progress { display: block; width: 100%; height: 9px; border: 0; border-radius: 9px; overflow: hidden; accent-color: var(--learn-primary); margin: 10px 0; background: #dfe5ef; }
progress::-webkit-progress-bar { background: #dfe5ef; }
progress::-webkit-progress-value { background: var(--learn-primary); }
.learn-text-button { background: none; border: 0; padding: 4px 0; font-size: 12px; color: var(--learn-muted); text-decoration: underline; }
.learn-safety { background: #eaf4f3; border: 1px solid #bdd8d2; border-radius: 10px; padding: 14px 18px; color: #27574f; font-size: 13px; margin-bottom: 24px; }
.learn-warning, .learn-note { border-left: 4px solid #af7600; background: #fff7e2; padding: 12px 16px; color: #624509; border-radius: 4px; font-size: 13px; }
.learn-workspace { display: grid; grid-template-columns: 295px minmax(0, 1fr); gap: 24px; align-items: start; }
.learn-topics, .learn-player { background: white; border: 1px solid var(--learn-border); border-radius: 14px; }
.learn-topics { padding: 22px 16px; }
.learn-topics > label { font-size: 13px; }
.learn-topics > .learn-muted { font-size: 12px; margin-top: 12px; }
.learn-topic-group { font-size: 11px; text-transform: uppercase; letter-spacing: 1.2px; color: var(--learn-muted); margin: 22px 8px 10px; }
.learn-topic { width: 100%; display: flex; gap: 11px; align-items: center; text-align: left; border: 1px solid transparent; border-radius: 8px; padding: 11px 8px; margin: 3px 0; }
.learn-topic.is-current { background: #edf1ff; border-color: #c3ceff; }
.learn-topic-number { display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: 50%; background: #eef1f6; color: var(--learn-muted); flex-shrink: 0; font-size: 12px; }
.learn-topic-number.is-complete { background: #d9efe6; color: #206544; }
.learn-topic strong { display: block; font-size: 13px; line-height: 1.45; }
.learn-topic small { display: block; font-size: 11px; font-weight: 400; color: var(--learn-muted); margin-top: 4px; }
.learn-player { padding: 30px; min-height: 680px; }
.learn-summary, .learn-explanation, .learn-prerequisites p { color: var(--learn-muted); }
.learn-prerequisites { font-size: 13px; padding-bottom: 10px; }
.learn-prerequisites p { margin: 10px 0 0; }
.learn-step-track { display: flex; gap: 8px; padding: 0; list-style: none; margin: 22px 0; }
.learn-step-track li { border-radius: 50%; width: 29px; height: 29px; display: flex; align-items: center; justify-content: center; background: #edf0f6; color: var(--learn-muted); font-size: 12px; }
.learn-step-track li.is-current { background: var(--learn-primary); color: white; }
.learn-step-track li.is-done { background: #d9efe6; color: #206544; }
.learn-step-heading { display: flex; justify-content: space-between; gap: 10px; align-items: baseline; }
.learn-coach { border: 1px solid #d4ddfc; background: #f4f6ff; padding: 18px; border-radius: 10px; margin: 20px 0 16px; }
.learn-coach.is-practice { border-color: #b4d9c8; background: #f0f9f4; }
.learn-coach p { margin: 6px 0 14px; font-size: 14px; }
.learn-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.learn-samples { margin: 12px 0 18px; font-size: 13px; }
.learn-samples dl { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 14px; background: #f5f7fc; padding: 14px; border-radius: 8px; }
.learn-samples dt { font-weight: 600; }
.learn-samples dd { margin: 0; overflow-wrap: anywhere; }
.learn-sim { border: 1px solid #bac6dd; border-radius: 10px; overflow: hidden; }
.learn-sim-chrome { display: flex; justify-content: space-between; align-items: center; gap: 12px; background: #17203f; color: white; padding: 14px 18px; font-size: 13px; }
.learn-sim-chrome .learn-badge { background: #303d66; color: white; font-size: 10px; }
.learn-breadcrumb { background: #f2f5fb; color: #485671; padding: 12px 18px; font-size: 13px; margin: 0; border-bottom: 1px solid var(--learn-border); }
.learn-sim-body { padding: 22px; }
.learn-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.learn-field { margin-bottom: 2px; }
.learn-field label { font-size: 12px; }
.learn-sim-body > .learn-actions { margin-top: 20px; }
button.learn-demo-target { opacity: 1; outline: 3px solid #d69300; outline-offset: 4px; animation: learn-pulse 1s ease-out 2; }
.learn-result { background: #eff8f2; border: 1px solid #bcdec8; color: #21543c; padding: 16px; margin-top: 22px; border-radius: 8px; }
.learn-result p { font-size: 13px; margin: 6px 0 0; }
.learn-feedback { margin: 14px 0 0; font-size: 13px; color: #21543c; }
.learn-feedback:empty { display: none; }
.learn-feedback.is-error { color: #a22635; }
.learn-table-wrap { overflow-x: auto; margin: 14px 0; }
table { width: 100%; border-collapse: collapse; font-size: 12px; color: var(--learn-ink); text-align: left; }
caption { caption-side: bottom; text-align: left; color: var(--learn-muted); font-size: 11px; padding: 9px 0 0; }
th, td { border-bottom: 1px solid #d8e1ed; padding: 12px 10px; white-space: nowrap; }
th { background: #f0f3fa; font-weight: 600; }
.learn-lesson-nav { display: flex; justify-content: space-between; gap: 12px; margin: 24px 0 12px; }
.learn-muted { color: var(--learn-muted); font-size: 12px; }
.learn-footer { color: var(--learn-muted); max-width: 880px; margin: 24px auto 0; text-align: center; font-size: 12px; }
.learn-completion { padding: 30px 24px; border: 1px solid #bddccf; border-radius: 12px; background: #f2faf5; margin-top: 28px; }
.learn-completion-icon { display: flex; align-items: center; justify-content: center; width: 46px; height: 46px; border-radius: 50%; color: #206544; background: #d9efe6; font-size: 24px; margin-bottom: 18px; }
.learn-completion .learn-actions { margin-top: 22px; }
.learn-skip { position: absolute; left: 16px; top: -100px; background: white; padding: 12px; z-index: 10; color: var(--learn-ink); }
.learn-skip:focus { top: 10px; }
dialog { max-width: 450px; width: calc(100% - 32px); color: var(--learn-ink); border: 1px solid var(--learn-border); border-radius: 14px; padding: 26px; }
dialog::backdrop { background: rgb(23 32 63 / 55%); }
@keyframes learn-pulse { 50% { box-shadow: 0 0 0 8px #f9d97e; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; } }
@media (max-width: 1000px) {
    .learn-workspace { grid-template-columns: 245px minmax(0, 1fr); gap: 16px; }
    .learn-player { padding: 22px; }
}
@media (max-width: 760px) {
    .learn-header { padding: 16px; }
    .learn-brand small { display: block; margin: 0; border: 0; padding: 0; font-size: 12px; }
    .learn-intro { align-items: stretch; flex-direction: column; gap: 12px; }
    .learn-progress-box { margin-bottom: 12px; }
    .learn-main { padding: 24px 14px; }
    .learn-workspace { grid-template-columns: minmax(0, 1fr); }
    #topic-list { display: flex; gap: 8px; overflow-x: auto; padding: 4px 0 12px; }
    .learn-topic-group { display: none; }
    .learn-topic { flex: 0 0 215px; }
    .learn-player { padding: 22px 16px; min-height: 0; }
    .learn-sim-body { padding: 16px; }
    .learn-fields { grid-template-columns: minmax(0, 1fr); gap: 14px; }
    .learn-step-heading { flex-wrap: wrap; margin-bottom: 10px; }
    .learn-step-heading h3 { margin-bottom: 0; }
    .learn-completion { padding: 22px 16px; }
    .learn-lesson-nav button { padding: 10px 12px; }
}

.learn-main { max-width: 1800px; }
.learn-workspace { grid-template-columns: 285px minmax(0, 1fr); }
.learn-topics { position: sticky; top: 16px; max-height: calc(100vh - 32px); overflow-y: auto; }
.learn-group-label { margin-top: 12px; font-size: 13px; }
.learn-route { font: 12px/1.6 Consolas, monospace; color: var(--learn-muted); overflow-wrap: anywhere; background: #f4f6fb; padding: 8px 12px; border-radius: 6px; }
.learn-step-track { flex-wrap: wrap; }
.learn-app-shell { display: grid; grid-template-columns: 140px minmax(0, 1fr); background: #f3f6f9; }
.learn-app-menu { background: #1e1e2d; color: #b5b5c3; font-size: 11px; padding: 20px 0; }
.learn-app-menu span { display: block; padding: 12px 14px; }
.learn-app-menu .is-current { background: #303044; color: white; border-left: 3px solid #5474fb; }
.learn-app-page { min-width: 0; padding: 22px 18px; max-height: 760px; overflow: auto; scroll-padding: 18px; }
.learn-app-title { font-size: 24px; font-weight: 700; margin-bottom: 4px; }
.learn-app-subtitle { font-size: 13px; color: #687689; margin-bottom: 16px; }
.learn-app-page .learn-sim-body { padding: 0; background: white; border-radius: 8px; overflow: hidden; }
.learn-app-section { padding: 24px; border-bottom: 1px solid #ebedf3; }
.learn-app-section:last-child { border-bottom: 0; }
.learn-app-section.is-focused { border-left: 3px solid #5474fb; }
.learn-app-section h4 { font-size: 17px; margin: 0 0 20px; }
.learn-section-note { font-size: 12px; color: #647388; margin-bottom: 18px; }
.learn-app-section .learn-fields { gap: 20px; }
.learn-fields-three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.learn-app-section input:not([type="checkbox"]):not([type="radio"]), .learn-app-section select, .learn-app-section textarea { border-color: #e0e5ee; background: #fff; padding: 15px 12px; font-size: 12px; border-radius: 6px; width: 100%; }
.learn-app-section input:disabled:not([type="checkbox"]):not([type="radio"]), .learn-app-section select:disabled, .learn-app-section textarea:disabled { color: #536176; background: #f7f8fa; }
.learn-app-section .learn-field label { font-weight: 500; color: #526176; }
.learn-app-section .learn-field.is-exercise input, .learn-app-section .learn-field.is-exercise select, .learn-app-section .learn-field.is-exercise textarea { border-color: #5474fb; background: #f7f9ff; }
.learn-app-section .learn-field.is-demonstrating { outline: 2px solid #d69300; outline-offset: 5px; border-radius: 5px; }
.learn-app-section .learn-field input[aria-invalid="true"],
.learn-app-section .learn-field select[aria-invalid="true"],
.learn-app-section .learn-field textarea[aria-invalid="true"],
.learn-app-section .learn-field fieldset[aria-invalid="true"] { border: 2px solid #a22635; background: #fff4f5; }
.learn-field-hint { display: block; font-size: 10px; line-height: 1.5; margin-bottom: 6px; color: #6c7688; }
.learn-app-section .learn-field { position: relative; }
.learn-app-section input[type="checkbox"], .learn-app-section input[type="radio"] { width: 18px; height: 18px; accent-color: #5474fb; vertical-align: middle; }
.learn-app-toolbar { justify-content: flex-end; margin-bottom: 18px; }
.learn-section-footer { margin-top: 20px; justify-content: flex-end; }
.learn-app-section button { border-radius: 4px; padding: 8px 12px; font-size: 11px; background: #5474fb; border-color: #5474fb; color: white; }
.learn-app-section .learn-control-danger { background: #f64e60; border-color: #f64e60; color: white; }
.learn-app-section .learn-control-download { background: #1d8b55; border-color: #1d8b55; }
.learn-app-section .learn-control-link, .learn-app-section .learn-control-tab { color: #4260dc; border: 0; background: transparent; padding: 6px; }
.learn-cell-actions { display: flex; flex-direction: column; gap: 7px; align-items: center; }
.learn-cell-actions .learn-control-download { color: #1b7045; border: 1px solid #a7ceb9; background: #edf8f1; }
.learn-cell-actions .learn-control-download::before { content: "XLS / "; font-size: 9px; }
.learn-app-section .learn-table-wrap { max-width: 100%; }
.learn-app-section table { font-size: 11px; }
.learn-app-section th { font-weight: 700; color: #526176; background: white; }
.learn-app-section td { padding: 14px 8px; }
.learn-app-section td .learn-field { min-width: 105px; }
.learn-app-section td .learn-field input { padding: 8px !important; }
.learn-app-tabs { display: flex; flex-wrap: wrap; border-bottom: 1px solid #ebedf3; padding: 0; background: white; }
.learn-app-tabs button { font-size: 11px; border: 0; border-radius: 0; background: white; color: #647388; padding: 14px 12px; font-weight: 600; max-width: 100%; }
.learn-app-tabs button.is-current { color: #5474fb; border-bottom: 3px solid #5474fb; }
.learn-app-tabs button:disabled { opacity: .85; }
.learn-training-modal { padding: 28px 18px; background: #d9dfeb; }
.learn-training-modal .learn-app-section { background: white; border-radius: 8px; box-shadow: 0 5px 18px #1e274025; }
.learn-company-logo { width: 90px; min-height: 90px; display: flex; align-items: center; text-align: center; border: 1px dashed #b9c5d8; font-size: 11px; color: #6e7b8f; margin-bottom: 20px; padding: 8px; }
.learn-company-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.learn-company-card { border: 1px solid #dde3ef; border-radius: 9px; padding: 22px; display: flex; flex-direction: column; align-items: flex-start; gap: 15px; }
.learn-company-card p { font-size: 11px; color: #6c7688; overflow-wrap: anywhere; }
.learn-qr-placeholder { width: 170px; min-height: 170px; border: 12px dashed #8996b0; display: flex; align-items: center; justify-content: center; padding: 20px; text-align: center; font-weight: 700; color: #526176; white-space: pre-line; }
.learn-radio-group { display: flex; gap: 18px; flex-wrap: wrap; border: 0; padding: 8px 0; }
.learn-radio-group label { display: flex; align-items: center; gap: 8px; font-size: 12px; margin: 0; }
.learn-radio-group input { margin: 0; }
.learn-demo-status { margin: 14px 0 0 !important; font-size: 12px !important; color: #805500; }
.learn-sim > .learn-result, .learn-sim > .learn-feedback { margin: 16px; }
.learn-visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }
@media (max-width: 1250px) {
    .learn-app-shell { grid-template-columns: 100px minmax(0, 1fr); }
    .learn-app-menu { font-size: 10px; }
    .learn-app-menu span { padding: 10px 8px; }
    .learn-app-section { padding: 18px; }
    .learn-app-page { padding: 16px 12px; }
    .learn-fields-three { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 1000px) {
    .learn-workspace { grid-template-columns: 235px minmax(0, 1fr); }
    .learn-app-shell { grid-template-columns: minmax(0, 1fr); }
    .learn-app-menu { display: none; }
}
@media (max-width: 760px) {
    .learn-workspace { grid-template-columns: minmax(0, 1fr); }
    .learn-topics { position: static; max-height: none; overflow: visible; }
    .learn-topics #topic-list { max-height: 155px; }
    .learn-app-page { max-height: 660px; padding: 16px 10px; }
    .learn-app-section { padding: 20px 14px; }
    .learn-fields-three, .learn-company-cards { grid-template-columns: minmax(0, 1fr); }
    .learn-app-section .learn-fields { gap: 16px; }
    .learn-app-tabs button { font-size: 10px; padding: 12px 8px; }
    .learn-app-toolbar, .learn-section-footer { justify-content: flex-start; }
    .learn-training-modal { padding: 16px 8px; }
}