*{box-sizing:border-box}:root{--bg: #0f172a;--card: #1e293b;--accent: #2563eb;--accent-hover: #1d4ed8;--finish: #16a34a;--finish-hover: #15803d;--text: #e2e8f0;--muted: #94a3b8;--error: #f87171}html,body,#root{margin:0;height:100%;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}.screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px}.card{background:var(--card);border-radius:16px;padding:40px;max-width:520px;width:100%;text-align:center;box-shadow:0 20px 60px #0006}.card h1{margin:0 0 12px;font-size:1.6rem}.subtitle{color:var(--muted);margin:0 0 24px;line-height:1.5}.login-form{display:flex;flex-direction:column;gap:14px}input{padding:14px 16px;border-radius:10px;border:1px solid #334155;background:#0f172a;color:var(--text);font-size:1rem;outline:none}input:focus{border-color:var(--accent)}.btn{padding:14px 24px;border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;color:#fff;transition:background .15s}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.primary{background:var(--accent)}.btn.primary:hover:not(:disabled){background:var(--accent-hover)}.btn.finish{background:var(--finish)}.btn.finish:hover{background:var(--finish-hover)}.error{color:var(--error);font-size:.9rem}.hint{color:var(--muted);font-size:.85rem}.training{justify-content:flex-start;gap:16px}.topbar{width:100%;max-width:1100px;display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:.9rem}.topbar .user{font-weight:600;color:var(--text)}.progress{width:100%;max-width:1100px;height:8px;background:#334155;border-radius:999px;overflow:hidden}.progress-bar{height:100%;background:var(--accent);transition:width .3s ease}.slide-wrap{width:100%;max-width:1100px;flex:1;display:flex;align-items:center;justify-content:center}.slide{max-width:100%;max-height:70vh;border-radius:12px;box-shadow:0 10px 40px #00000080}.controls{display:flex;gap:12px;padding-bottom:16px}.controls .btn{min-width:200px}