:root{--bg: #050505;--bg-2: #0c1216;--ink: #ffffff;--muted: #8b969c;--cyan: #00a9dc;--lime: #93b243;--accent: var(--cyan);--accent-2: var(--lime);--line: rgba(255, 255, 255, .12);--danger: #e86a5a;--radius: 12px;--font-display: "Outfit", system-ui, sans-serif;--font-body: "Source Sans 3", system-ui, sans-serif}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;font-family:var(--font-body);color:var(--ink);background:radial-gradient(ellipse 80% 55% at 8% -5%,rgba(0,169,220,.22),transparent 55%),radial-gradient(ellipse 60% 45% at 100% 5%,rgba(147,178,67,.16),transparent 50%),linear-gradient(165deg,var(--bg) 0%,var(--bg-2) 50%,#000 100%);background-attachment:fixed}a{color:var(--cyan);text-decoration:none}a:hover{text-decoration:underline}button,input,textarea,select{font:inherit}.shell{max-width:1100px;margin:0 auto;padding:1.25rem 1.5rem 3rem}.top{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-bottom:1rem;border-bottom:1px solid var(--line);margin-bottom:1.75rem;animation:fade-up .45s ease both}.brand{display:inline-flex;align-items:center;gap:.65rem;font-family:var(--font-display);font-size:1.15rem;font-weight:700;letter-spacing:-.02em;color:var(--ink);text-decoration:none}.brand:hover{text-decoration:none}.brand img{width:36px;height:36px;object-fit:contain}.brand .word{display:flex;flex-direction:column;line-height:1.05}.brand .word small{font-size:.68rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.brand .word strong{font-size:1.05rem;color:var(--cyan);font-weight:700}.top nav{display:flex;gap:.85rem;align-items:center;flex-wrap:wrap}.top nav a,.linkish{color:var(--muted);background:none;border:none;cursor:pointer;padding:0}.top nav a:hover,.linkish:hover{color:var(--ink)}.hero{padding:2rem 0 1.75rem;display:grid;gap:1rem;animation:fade-up .55s ease .05s both}.hero-brand{display:flex;align-items:center;gap:1rem}.hero-brand 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ease,border-color .15s ease}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--cyan);color:#041018}.btn-primary:hover{background:#19b8e6}.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}.btn-ghost:hover{border-color:#00a9dc73}.btn-danger{background:transparent;border-color:#e86a5a73;color:var(--danger)}.course-list{list-style:none;margin:0;padding:0;display:grid;gap:.85rem}.course-list li{animation:fade-up .45s ease both}.course-row{display:block;padding:1.1rem 1.2rem;border-bottom:1px solid var(--line);color:inherit;text-decoration:none;transition:background .15s ease,padding-left .15s ease,border-color .15s ease}.course-row:hover{background:#00a9dc0f;padding-left:1.4rem;text-decoration:none;border-color:#00a9dc40}.course-row h2{font-family:var(--font-display);font-size:1.35rem;margin:0 0 .35rem}.course-row p{margin:0;color:var(--muted)}.tags{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.55rem}.tag{font-size:.75rem;color:var(--lime);border:1px solid rgba(147,178,67,.45);padding:.15rem .45rem;border-radius:999px}.muted{color:var(--muted)}.layout-course{display:grid;grid-template-columns:minmax(200px,260px) 1fr;gap:1.5rem}@media (max-width: 800px){.layout-course{grid-template-columns:1fr}}.outline{border-right:1px solid var(--line);padding-right:1rem}.outline h3{font-family:var(--font-display);margin:0 0 .75rem;font-size:1rem}.outline ol{margin:0;padding-left:1.1rem;display:grid;gap:.4rem}.outline a.active{color:var(--cyan);font-weight:600}.viewer{animation:fade-up .4s ease both}.viewer h1,.markdown h1,.markdown h2,.markdown h3{font-family:var(--font-display)}.markdown{line-height:1.65}.markdown a{color:var(--cyan)}.markdown pre{overflow:auto;background:#00000073;padding:.85rem 1rem;border-radius:var(--radius);border:1px solid var(--line)}.markdown code{font-size:.92em}.markdown blockquote{margin:1rem 0;padding-left:1rem;border-left:3px solid var(--lime);color:var(--muted)}.form-grid{display:grid;gap:.9rem;max-width:720px}label{display:grid;gap:.35rem;font-weight:600;font-size:.92rem}input,textarea,select{background:#00000059;border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);padding:.65rem .8rem}input:focus,textarea:focus,select:focus{outline:2px solid rgba(0,169,220,.4);border-color:transparent}textarea{min-height:220px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9rem;line-height:1.5}.editor-split{display:grid;grid-template-columns:1fr 1fr;gap:1rem}@media (max-width: 900px){.editor-split{grid-template-columns:1fr}}.preview-pane{border:1px solid var(--line);border-radius:var(--radius);padding:1rem;min-height:220px;background:#00000047}.login-page{min-height:100vh;display:grid;place-items:center;padding:1.5rem}.login-panel{width:min(420px,100%);animation:fade-up .5s ease both;text-align:center}.login-mark{width:96px;height:96px;margin:0 auto 1rem;object-fit:contain;filter:drop-shadow(0 0 32px rgba(0,169,220,.4));animation:mark-in .75s ease both}.login-panel .company{margin:0;font-family:var(--font-display);font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:600}.login-panel .product{font-family:var(--font-display);font-size:3rem;margin:.35rem 0 .5rem;letter-spacing:-.04em;color:var(--cyan)}.login-panel>.muted{text-align:center}.login-panel form{display:grid;gap:.85rem;margin-top:1.5rem;text-align:left}.error{color:var(--danger);margin:.5rem 0 0}.empty{padding:2rem 0;color:var(--muted)}.actions{display:flex;flex-wrap:wrap;gap:.6rem;margin:1rem 0}.check{display:flex;align-items:center;gap:.5rem;font-weight:500}@keyframes fade-up{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes mark-in{0%{opacity:0;transform:scale(.88) rotate(-6deg)}to{opacity:1;transform:scale(1) rotate(0)}}