:root {
  --ink: #eaf0ff; --muted: #98a4bd; --muted-2: #65718a; --surface: #11192c; --surface-2: #17223a;
  --line: rgba(170, 193, 255, .16); --purple: #9b8cff; --cyan: #5ce0da; --lime: #c9f36b; --bg: #090e1b;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: radial-gradient(circle at 75% -8%, #202557 0, transparent 35rem), var(--bg); font: 500 15px/1.65 Manrope, system-ui, sans-serif; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
.topbar { max-width: 1390px; margin: auto; height: 78px; padding: 0 38px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 11px; color: var(--ink); text-decoration: none; font: 800 14px/1 Manrope; letter-spacing: .13em; }
.brand em { display: block; margin-top: 5px; color: var(--muted); font: 500 8px/1 "DM Mono", monospace; letter-spacing: .16em; font-style: normal; }
.brand-mark { width: 32px; height: 32px; display: grid; place-items: center; border: 1px solid var(--purple); color: var(--purple); font: 500 11px "DM Mono"; }
.top-actions { display: flex; gap: 19px; align-items: center; color: var(--muted); }
.text-button, .import-label, .quiet-button { border: 0; background: none; color: var(--muted); padding: 5px; font: 500 12px "DM Mono"; text-transform: uppercase; letter-spacing: .05em; }
.text-button:hover, .import-label:hover, .quiet-button:hover { color: var(--ink); }
.icon-button { width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 50%; color: var(--ink); background: transparent; }
main { max-width: 1390px; margin: auto; padding: 0 38px 74px; }
.hero { min-height: 355px; padding: 76px 1px 62px; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, .65fr); gap: 66px; align-items: center; }
.eyebrow, .card-label, .metric p, .rail-label, .outcome-box span, .lesson-topline, .notes-section label, footer { margin: 0; color: var(--cyan); font: 500 10px "DM Mono"; letter-spacing: .12em; }
h1, h2, h3, p { margin-top: 0; } h1 { margin-bottom: 17px; font-size: clamp(38px, 5.25vw, 67px); letter-spacing: -.06em; line-height: 1.07; }
.hero-copy { max-width: 635px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; align-items: center; gap: 16px; margin-top: 30px; }
.primary-button { border: 0; background: var(--lime); color: #132000; padding: 12px 17px; font: 800 12px Manrope; letter-spacing: .02em; text-decoration: none; transition: transform .15s, box-shadow .15s; }
.primary-button:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(201,243,107,.18); }.primary-button span { margin-left: 13px; }
.mission-card { position: relative; padding: 25px; background: linear-gradient(135deg, rgba(155,140,255,.17), rgba(92,224,218,.05)); border: 1px solid rgba(155,140,255,.45); }
.mission-card::before { content: ""; position: absolute; top: -1px; right: 19px; width: 38px; border-top: 2px solid var(--lime); }.mission-card h2 { margin: 14px 0 25px; font-size: 19px; line-height: 1.42; letter-spacing: -.025em; }.signal { color: var(--muted); font: 11px "DM Mono"; }.signal span { display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 11px var(--lime); }
.metrics { display: grid; grid-template-columns: 2fr repeat(3, 1fr); border: 1px solid var(--line); background: rgba(17,25,44,.58); }.metric { min-height: 117px; padding: 24px; border-left: 1px solid var(--line); }.metric:first-child { border: 0; }.metric p { color: var(--muted); }.metric strong { display: block; margin: 3px 0 2px; font-size: 27px; letter-spacing: -.05em; }.metric small { color: var(--muted-2); font: 11px "DM Mono"; }.progress-metric { display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto; column-gap: 26px; }.progress-metric small { grid-column: 2; }.progress-track { align-self: end; height: 6px; margin-bottom: 16px; background: #26324b; }.progress-track span { display: block; width: 0; height: 100%; background: linear-gradient(90deg,var(--cyan),var(--lime)); transition: width .35s ease; }
.workspace { display: grid; grid-template-columns: 234px minmax(0, 1fr); margin-top: 49px; border: 1px solid var(--line); background: rgba(17,25,44,.42); }.rail { min-height: 660px; padding: 27px 19px; border-right: 1px solid var(--line); }.rail-label { color: var(--muted-2); }.rail nav { margin-top: 17px; }.module-tab { width: 100%; display: flex; align-items: flex-start; gap: 10px; padding: 11px 9px; border: 0; border-left: 2px solid transparent; background: transparent; color: var(--muted); text-align: left; }.module-tab:hover { color: var(--ink); }.module-tab.active { border-left-color: var(--lime); background: rgba(201,243,107,.06); color: var(--ink); }.module-tab.complete .tab-index { background: var(--lime); color: #172000; border-color: var(--lime); }.tab-index { flex: 0 0 auto; width: 22px; height: 22px; display: grid; place-items: center; border: 1px solid var(--muted-2); color: var(--muted); font: 10px "DM Mono"; }.tab-copy { font-size: 12px; line-height: 1.35; }.tab-copy small { display: block; margin-top: 3px; color: var(--muted-2); font: 9px "DM Mono"; }.focus-log { margin: 32px 9px 0; padding-top: 20px; border-top: 1px solid var(--line); }.focus-log div { display: flex; gap: 6px; margin-top: 12px; }.focus-add { border: 1px solid var(--line); background: transparent; color: var(--cyan); padding: 5px 7px; font: 10px "DM Mono"; }.focus-add:hover { border-color: var(--cyan); }
.lesson-panel { min-width: 0; }.lesson-content { padding: 36px 45px 29px; }.lesson-topline { display: flex; justify-content: space-between; color: var(--purple); }.status-pill { color: var(--muted-2); }.status-pill.done { color: var(--lime); }.module-title { margin: 10px 0 7px; font-size: 32px; letter-spacing: -.055em; }.module-intro { max-width: 850px; color: var(--muted); font-size: 15px; }.outcome-box { margin: 26px 0 31px; padding: 14px 17px; border-left: 2px solid var(--cyan); background: rgba(92,224,218,.055); }.outcome-box p { margin: 3px 0 0; color: #cbd4e9; font-size: 13px; }.lesson-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 45px; }.lesson-grid h3, .checklist-section h3 { margin-bottom: 13px; font-size: 14px; letter-spacing: -.02em; }.resource, .build-item { position: relative; display: block; padding: 10px 0 10px 16px; color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--line); font-size: 12px; }.resource::before, .build-item::before { position: absolute; left: 1px; color: var(--purple); content: "↗"; }.build-item::before { content: "→"; color: var(--cyan); }.resource:hover { color: var(--cyan); }.resource span { display: block; color: var(--muted-2); font: 9px "DM Mono"; margin-top: 2px; }.checklist-section { display: grid; grid-template-columns: .75fr 1.25fr; gap: 45px; margin-top: 42px; padding: 23px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }.checklist-section p { color: var(--muted-2); font-size: 12px; }.checklist { display: grid; grid-template-columns: 1fr 1fr; gap: 7px 18px; }.check-item { display: flex; gap: 9px; color: var(--muted); font-size: 12px; cursor: pointer; }.check-item input { appearance: none; width: 15px; height: 15px; margin: 3px 0 0; border: 1px solid var(--muted-2); background: transparent; }.check-item input:checked { border-color: var(--lime); background: var(--lime); box-shadow: inset 0 0 0 3px var(--surface); }.check-item:has(input:checked) { color: var(--ink); text-decoration: line-through; text-decoration-color: var(--lime); }.notes-section { margin-top: 25px; }.notes-section label { display: block; color: var(--muted); }.notes-section label span { color: var(--muted-2); font-size: 9px; }.module-notes { width: 100%; height: 102px; margin-top: 8px; resize: vertical; padding: 12px; border: 1px solid var(--line); outline: 0; background: rgba(7,11,23,.45); color: var(--ink); font: 12px/1.6 "DM Mono"; }.module-notes:focus { border-color: var(--purple); }.lesson-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 22px; }.time-estimate { margin: 0; color: var(--muted-2); font: 10px "DM Mono"; }
.guided-section { display: grid; grid-template-columns: .72fr 1.28fr; gap: 42px; margin: 0 0 34px; padding: 24px; border: 1px solid var(--line); background: linear-gradient(115deg, rgba(155,140,255,.09), transparent 65%); }.section-label { margin-bottom: 7px; color: var(--cyan); font: 10px "DM Mono"; letter-spacing: .12em; }.guided-title { margin-bottom: 8px; font-size: 19px; line-height: 1.3; letter-spacing: -.035em; }.guided-summary { margin: 0; color: var(--muted); font-size: 12px; }.guided-steps { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; counter-reset: learn; }.guided-steps li { position: relative; min-height: 42px; padding: 3px 0 3px 34px; color: var(--muted); font-size: 12px; }.guided-steps li::before { position: absolute; left: 0; top: 0; width: 23px; height: 23px; display: grid; place-items: center; counter-increment: learn; content: counter(learn); color: var(--purple); border: 1px solid rgba(155,140,255,.5); font: 10px "DM Mono"; }.guided-steps strong { color: var(--ink); }.video-section { display: grid; grid-template-columns: .75fr 1.25fr; gap: 24px; margin: 0 0 36px; padding: 20px; border: 1px solid rgba(201,243,107,.32); background: rgba(201,243,107,.035); }.video-copy h3 { margin: 8px 0; font-size: 16px; letter-spacing: -.03em; }.video-copy p:not(.section-label) { color: var(--muted); font-size: 12px; }.video-link { color: var(--lime); font: 10px "DM Mono"; text-decoration: none; }.video-frame { aspect-ratio: 16 / 9; overflow: hidden; background: #060914; }.video-frame iframe { width: 100%; height: 100%; border: 0; }
.video-frame.local-file-warning { display: grid; place-items: center; padding: 28px; aspect-ratio: 16 / 9; border: 1px dashed rgba(92,224,218,.38); background: rgba(92,224,218,.04); }.local-file-warning p { max-width: 330px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }.local-file-warning strong { display: block; color: var(--ink); }.local-file-warning code { color: var(--lime); font: 11px "DM Mono"; }
.capstone { display: grid; grid-template-columns: .7fr 1.3fr; gap: 68px; margin-top: 64px; padding: 38px 0; border-top: 1px solid var(--line); }.capstone h2 { margin: 7px 0; font-size: 32px; letter-spacing: -.055em; }.capstone-heading > p:last-child { color: var(--muted); }.demo-flow { counter-reset: demo; display: grid; grid-template-columns: repeat(2,1fr); gap: 1px; margin: 0; padding: 0; list-style: none; background: var(--line); }.demo-flow li { min-height: 95px; padding: 16px; background: var(--surface); color: var(--muted); font-size: 12px; }.demo-flow li::before { counter-increment: demo; content: "0" counter(demo); display: block; margin-bottom: 4px; color: var(--lime); font: 10px "DM Mono"; } footer { max-width: 1390px; display: flex; justify-content: space-between; margin: auto; padding: 22px 38px; border-top: 1px solid var(--line); color: var(--muted-2); font-size: 9px; }
body.light { --ink: #152039; --muted: #52617a; --muted-2: #8390a4; --surface: #f8faff; --surface-2: #eef2fa; --line: rgba(29, 51, 89, .15); --bg: #eef2f9; } body.light { background: radial-gradient(circle at 75% -8%, #d6d5ff 0, transparent 35rem), var(--bg); }.light .module-notes { background: #fff; }.light .progress-track { background: #d7deeb; }
.continue-sub { margin: 12px 0 0; color: var(--muted); font: 11px "DM Mono"; }.module-nav-group + .module-nav-group { margin-top: 2px; }.lesson-nav { margin: 3px 0 8px 29px; padding-left: 10px; border-left: 1px solid var(--line); }.lesson-nav-item { width: 100%; display: flex; gap: 7px; align-items: flex-start; padding: 6px 0; border: 0; background: transparent; color: var(--muted); text-align: left; font: 10px/1.35 Manrope; }.lesson-nav-item span { color: var(--muted-2); font: 9px "DM Mono"; }.lesson-nav-item.active { color: var(--cyan); }.lesson-nav-item.complete span { color: var(--lime); }.module-overview { padding: 36px 45px 38px; }.module-status { display: grid; grid-template-columns: repeat(3, 1fr); margin: 30px 0 37px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }.module-status div { padding: 17px 16px; border-left: 1px solid var(--line); }.module-status div:first-child { border: 0; }.module-status span { display: block; color: var(--muted-2); font: 9px "DM Mono"; letter-spacing: .1em; }.module-status strong { display: block; margin-top: 4px; color: var(--ink); font-size: 15px; letter-spacing: -.03em; }.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; margin-bottom: 13px; }.section-heading h3 { margin: 0; font-size: 14px; font-weight: 600; }.lesson-map { display: grid; border-top: 1px solid var(--line); }.lesson-map-item { display: grid; grid-template-columns: 42px 1fr 20px; align-items: center; gap: 13px; min-height: 70px; padding: 13px 6px; border: 0; border-bottom: 1px solid var(--line); background: transparent; color: var(--ink); text-align: left; }.lesson-map-item:hover { background: rgba(92,224,218,.04); }.lesson-map-item.complete .map-number { border-color: var(--lime); background: var(--lime); color: #132000; }.map-number { width: 27px; height: 27px; display: grid; place-items: center; border: 1px solid var(--muted-2); color: var(--muted); font: 10px "DM Mono"; }.lesson-map-item strong { display: block; font-size: 13px; }.lesson-map-item small { display: block; margin-top: 2px; color: var(--muted); font: 10px "DM Mono"; }.lesson-map-item b { color: var(--cyan); font-weight: 400; }.module-output { margin-top: 34px; padding: 22px; background: rgba(155,140,255,.06); border-left: 2px solid var(--purple); }.module-output ul { display: grid; grid-template-columns: 1fr 1fr; gap: 9px 28px; margin: 13px 0 0; padding: 0; list-style: none; color: var(--muted); font-size: 12px; }.module-output li::before { content: "•"; color: var(--cyan); margin-right: 8px; }.module-gate { display: grid; grid-template-columns: .8fr 1.2fr; gap: 30px; margin-top: 36px; padding-top: 29px; border-top: 1px solid var(--line); }.module-gate h3 { margin: 5px 0; font-size: 18px; }.module-gate > div > p:last-child { color: var(--muted); font-size: 12px; }.module-gate-list { display: grid; align-content: start; gap: 8px; }.gate-item { margin: 0; padding: 10px; background: rgba(255,255,255,.025); color: var(--muted); font-size: 12px; }.gate-item span { color: var(--muted-2); margin-right: 8px; }.gate-item.done { color: var(--ink); }.gate-item.done span { color: var(--lime); }.back-to-module { margin: 0 0 22px; padding: 0; border: 0; background: transparent; color: var(--cyan); font: 10px "DM Mono"; }.lesson-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 25px; }.lesson-meta span { padding: 5px 8px; border: 1px solid var(--line); color: var(--muted); font: 10px "DM Mono"; }.why-section { margin: 0 0 30px; padding: 17px 19px; border-left: 2px solid var(--cyan); background: rgba(92,224,218,.055); }.why-copy { max-width: 900px; margin: 0; color: #cbd4e9; font-size: 14px; }.video-copy .watch-prompt { margin: 16px 0; color: var(--ink); font-weight: 600; }.evidence-section { display: grid; grid-template-columns: .75fr 1.25fr; gap: 38px; margin-top: 25px; padding: 23px 0; border-bottom: 1px solid var(--line); }.evidence-section h3 { margin: 6px 0; font-size: 14px; }.evidence-copy { margin: 0; color: var(--muted); font-size: 12px; }.lesson-evidence { width: 100%; min-height: 118px; resize: vertical; padding: 12px; border: 1px solid var(--line); outline: 0; background: rgba(7,11,23,.45); color: var(--ink); font: 12px/1.6 "DM Mono"; }.lesson-evidence:focus { border-color: var(--cyan); }.knowledge-section { margin-top: 25px; padding: 21px; border: 1px solid var(--line); background: rgba(255,255,255,.018); }.knowledge-section h3 { max-width: 720px; margin: 8px 0 16px; font-size: 15px; }.question-options { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }.question-option { padding: 10px; border: 1px solid var(--line); background: transparent; color: var(--muted); text-align: left; font-size: 12px; }.question-option:hover, .question-option.selected { border-color: var(--purple); color: var(--ink); background: rgba(155,140,255,.08); }.answer-feedback { min-height: 18px; margin: 12px 0 0; color: #f2c56a; font-size: 12px; }.answer-feedback.correct { color: var(--lime); }.lesson-footer .primary-button { white-space: nowrap; }.demo-flow li.ready { border-left: 2px solid var(--lime); }.demo-flow li.locked { opacity: .64; }.demo-flow li strong, .demo-flow li span { display: block; }.demo-flow li strong { color: var(--ink); font-size: 13px; }.demo-flow li span { margin-top: 3px; font: 10px "DM Mono"; }
@media (max-width: 820px) { .topbar, main, footer { padding-left: 19px; padding-right: 19px; }.top-actions .text-button, .import-label { display: none; }.hero, .capstone { grid-template-columns: 1fr; gap: 28px; }.hero { padding: 47px 0; }.metrics { grid-template-columns: 1fr 1fr; }.metric { border-top: 1px solid var(--line); }.progress-metric { grid-column: span 2; }.workspace { grid-template-columns: 1fr; }.rail { min-height: 0; border: 0; border-bottom: 1px solid var(--line); }.rail nav { display: flex; overflow-x: auto; }.module-tab { min-width: 140px; }.lesson-nav { display: none; }.focus-log { display: none; }.lesson-content, .module-overview { padding: 27px 21px; }.guided-section, .video-section, .lesson-grid, .checklist-section, .module-gate, .evidence-section { grid-template-columns: 1fr; gap: 22px; }.module-status, .module-output ul, .question-options { grid-template-columns: 1fr; }.module-status div { border-left: 0; border-top: 1px solid var(--line); }.module-status div:first-child { border-top: 0; }.checklist { grid-template-columns: 1fr; } }