:root { color-scheme: dark; font-family: Inter, system-ui, sans-serif; background: #10151d; color: #eef3f8; }
[hidden] { display: none !important; }
body { margin: 0; } main { max-width: 980px; margin: 0 auto; padding: 56px 24px; } header { border-left: 5px solid #ffbd59; padding-left: 20px; margin-bottom: 36px; } h1 { font-size: clamp(2.5rem, 7vw, 5rem); margin: 0; letter-spacing: -.06em; } h2 { margin: 8px 0; } .eyebrow, .lesson > p:first-child { color: #ffbd59; font-size: .75rem; font-weight: 700; letter-spacing: .12em; } .lessons { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; } .lesson, .workspace { background: #18212c; border: 1px solid #2a3a4a; border-radius: 12px; padding: 20px; } .lesson button { margin-top: 16px; } .bar { height: 7px; background: #2a3a4a; border-radius: 4px; overflow: hidden; margin: 16px 0 8px; } .bar span { display: block; height: 100%; background: #ffbd59; } .workspace { margin-top: 28px; } pre { white-space: pre-wrap; font: 1rem/1.5 ui-monospace, monospace; background: #10151d; padding: 16px; border-radius: 8px; } textarea { display: block; box-sizing: border-box; width: 100%; margin: 16px 0; background: #10151d; border: 1px solid #405366; border-radius: 8px; color: inherit; padding: 12px; font: 1rem/1.45 ui-monospace, monospace; } button { background: #ffbd59; color: #151a20; border: 0; border-radius: 6px; padding: 10px 14px; font-weight: 800; cursor: pointer; } .toggle, .file-upload { display: block; margin: 12px 0; } #result { white-space: pre-wrap; line-height: 1.5; }
.exam-section { margin-top: 42px; }.exam-card { border-color: #bd8cff; background: linear-gradient(135deg, #211c36, #18212c); }.exam-card > p:first-child { color: #bd8cff; }.exam-workspace { border-color: #bd8cff; box-shadow: 0 0 0 1px #bd8cff44; }.format { color: #c9b1ff; font-weight: 700; }.source-link, .download { display: inline-block; margin-top: 16px; color: #72d6ff; font-weight: 700; }.resources { display: grid; gap: 12px; margin: 16px 0; }.resources figure { margin: 0; padding: 12px; border: 1px solid #405366; border-radius: 8px; }.resources img { display: block; max-width: 100%; height: auto; }.resources figcaption { margin-top: 8px; color: #b7c4d1; font-size: .9rem; }.file-upload input { display: block; margin-top: 8px; }
.login-screen { display: grid; min-height: 100vh; place-items: center; padding: 24px; }.login-form { display: grid; gap: 14px; width: min(360px, 100%); padding: 28px; border: 1px solid #405366; border-radius: 12px; background: #18212c; }.login-form h1 { font-size: 2.5rem; }.login-form label { display: grid; gap: 6px; font-weight: 700; }.login-form input { border: 1px solid #405366; border-radius: 6px; padding: 10px; background: #10151d; color: inherit; }.subject-nav { display: flex; gap: 8px; overflow-x: auto; margin: 16px 0 28px; padding-bottom: 4px; }.subject-tab { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 8px; background: #243242; color: #cbd8e5; border: 1px solid #405366; }.subject-tab:hover { background: #31465c; }.subject-tab.active { background: #ffbd59; border-color: #ffbd59; color: #151a20; }.subject-progress { border-radius: 999px; padding: 2px 7px; background: #10151d; color: #eef3f8; font-size: .75rem; }.subject-tab.active .subject-progress { background: #151a20; color: #ffbd59; }.account { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 20px; }.quiet { background: #405366; color: #eef3f8; }
.lesson.planned { border-style: dashed; opacity: .78; }.lesson.planned small { color: #b7c4d1; }
.lesson[draggable="true"] { cursor: grab; }.lesson.dragging { opacity: .45; }.lesson-prerequisites { display: block; margin-top: 12px; color: #b7c4d1; }.guide-link { display: inline-block; margin-top: 16px; color: #72d6ff; font-weight: 700; }.guide-page { max-width: 760px; }.guide-page .workspace { margin-top: 20px; }.guide-page li { margin: 8px 0; }.guide-page a { color: #72d6ff; }.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; color: #b7c4d1; }.breadcrumbs .source-link { margin: 0; }.guide-page dl { border-left: 3px solid #ffbd59; margin: 12px 0 24px; padding-left: 16px; }.guide-page dt { color: #ffbd59; font-weight: 800; margin-top: 12px; }.guide-page dd { margin: 4px 0 0; line-height: 1.5; }.guide-page #guide-example { border: 1px solid #405366; border-radius: 8px; line-height: 1.5; padding: 14px; }