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12px;color:var(--error);font-size:13px}.auth-submit{padding:12px;background:var(--accent);border:none;border-radius:6px;color:#fff;font-size:15px;font-weight:600;cursor:pointer;transition:background .2s;margin-top:8px}.auth-submit:hover{background:#c45a20}.auth-toggle{text-align:center;margin-top:16px;font-size:14px;color:var(--text-dim)}.auth-link{background:none;border:none;color:var(--accent);cursor:pointer;font-size:14px;text-decoration:underline;padding:0}.auth-link:hover{color:var(--accent-light)}.auth-connecting{text-align:center;padding:8px 12px;margin-bottom:12px;background:#c490301a;border:1px solid var(--warning);border-radius:6px;color:var(--warning);font-size:13px}.header{display:flex;align-items:center;justify-content:space-between;padding:0 20px;height:52px;background:var(--bg-secondary);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.header-left{display:flex;align-items:center;gap:24px}.header-brand{cursor:pointer;-webkit-user-select:none;user-select:none}.header-logo{font-size:18px;font-weight:700;color:var(--accent);letter-spacing:-.5px}.header-nav{display:flex;gap:0}.header-tab{padding:14px 16px;background:none;border:none;color:var(--text-dim);cursor:pointer;font-size:14px;font-weight:500;border-bottom:2px solid transparent;transition:color .2s,border-color .2s}.header-tab:hover{color:var(--text)}.header-tab.active{color:var(--accent);border-bottom-color:var(--accent)}.header-right{position:relative}.header-user{display:flex;align-items:center;gap:8px;cursor:pointer;padding:6px 10px;border-radius:6px;transition:background .2s}.header-user:hover{background:var(--bg-card)}.header-avatar{width:28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600}.header-username{font-size:14px;font-weight:500;color:var(--text)}.header-arrow{font-size:12px;color:var(--text-dim)}.header-dropdown{position:absolute;top:100%;right:0;margin-top:4px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:8px;box-shadow:0 4px 16px #00000026;min-width:160px;overflow:hidden;z-index:200}.header-dropdown-item{display:block;width:100%;padding:10px 16px;background:none;border:none;text-align:left;cursor:pointer;font-size:14px;color:var(--text);transition:background .15s}.header-dropdown-item:hover{background:var(--bg-card)}.header-dropdown-logout{color:var(--error);border-top:1px solid var(--border)}.header-dropdown-logout:hover{background:#b8545014}.header-auth-btn{padding:6px 14px;border:1px solid var(--border);border-radius:6px;background:var(--bg-card);color:var(--text);cursor:pointer;font-size:13px;font-weight:500;transition:border-color .2s}.header-auth-btn:hover{border-color:var(--accent)}.header-auth-btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}.header-auth-btn-primary:hover{background:#c45a20}.welcome-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:40px 20px}.welcome-content{max-width:560px;text-align:center}.welcome-title{font-size:48px;color:var(--accent);margin-bottom:12px;letter-spacing:-1px}.welcome-subtitle{font-size:18px;color:var(--text);margin-bottom:12px;font-weight:500}.welcome-description{font-size:15px;color:var(--text-dim);line-height:1.6;margin-bottom:24px}.welcome-stats{margin-bottom:32px;font-size:16px}.welcome-stats-count{font-weight:600;color:var(--accent)}.welcome-stats-detail{color:var(--text-dim)}.welcome-buttons{display:flex;gap:12px;justify-content:center}.welcome-btn{padding:12px 32px;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;transition:background .2s,transform .1s}.welcome-btn:active{transform:scale(.98)}.welcome-btn-primary{background:var(--accent);border:none;color:#fff}.welcome-btn-primary:hover{background:#c45a20}.welcome-btn-secondary{background:var(--bg-card);border:1px solid var(--border);color:var(--text)}.welcome-btn-secondary:hover{border-color:var(--accent)}.profile-page{max-width:640px;margin:0 auto;padding:24px 20px}.profile-title{font-size:24px;color:var(--accent);margin-bottom:20px}.profile-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:10px;padding:20px 24px;margin-bottom:16px}.profile-section{padding:12px 0;border-bottom:1px solid var(--border)}.profile-section:last-child{border-bottom:none}.profile-label{display:block;font-size:11px;color:var(--text-dim);font-weight:600;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}.profile-value-row{display:flex;align-items:center;gap:10px}.profile-value{font-size:15px;color:var(--text)}.profile-value-readonly{color:var(--text-dim)}.profile-badge{display:inline-block;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:600;text-transform:uppercase}.profile-badge-email{background:#5a8a5e26;color:var(--success)}.profile-btn-edit{background:none;border:none;color:var(--accent);cursor:pointer;font-size:13px;padding:0;margin-left:auto}.profile-btn-edit:hover{text-decoration:underline}.profile-edit-row{display:flex;gap:8px;align-items:center}.profile-edit-col{display:flex;flex-direction:column;gap:8px}.profile-input{padding:8px 10px;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:6px;font-size:14px;outline:none}.profile-input:focus{border-color:var(--accent)}.profile-btn-save{padding:6px 14px;background:var(--accent);border:none;border-radius:6px;color:#fff;font-size:13px;font-weight:600;cursor:pointer}.profile-btn-save:hover{background:#c45a20}.profile-btn-cancel{padding:6px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:6px;color:var(--text);font-size:13px;cursor:pointer}.profile-btn-cancel:hover{border-color:var(--text-dim)}.profile-error{margin-top:12px;padding:8px 12px;background:#b854501a;border:1px solid var(--error);border-radius:6px;color:var(--error);font-size:13px}.profile-success{margin-top:12px;padding:8px 12px;background:#5a8a5e1a;border:1px solid var(--success);border-radius:6px;color:var(--success);font-size:13px}.profile-progress-title{font-size:16px;color:var(--accent);margin-bottom:8px}.profile-progress-stats{font-size:15px;color:var(--text)}.connection-toast{position:fixed;bottom:20px;left:50%;transform:translate(-50%);padding:10px 20px;border-radius:8px;font-size:14px;font-weight:500;z-index:1000;pointer-events:none;animation:toast-in .3s ease;box-shadow:0 4px 12px #00000026}.connection-toast-disconnect{background:#b85450f2;color:#fff}.connection-toast-reconnect{background:#5a8a5ef2;color:#fff}@keyframes toast-in{0%{opacity:0;transform:translate(-50%) translateY(10px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.solution-panel{background:var(--bg-secondary);border:1px solid var(--border);border-radius:8px;padding:16px;margin-top:12px}.solution-panel-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.solution-panel-header h3{font-size:16px;color:var(--text)}.solution-badge{padding:3px 10px;border-radius:12px;font-size:12px;font-weight:600}.solution-badge.solved{background:#5a8a5e26;color:var(--success);border:1px solid var(--success)}.solution-buttons{display:flex;gap:8px;margin-bottom:8px}.solution-buttons .btn-run{flex:1;padding:8px 16px;background:var(--accent);color:#fff;border:none;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:background .15s}.solution-buttons .btn-run:hover:not(:disabled){background:var(--accent-light)}.solution-buttons .btn-run:disabled{opacity:.6;cursor:not-allowed}.solution-buttons .btn-check{flex:1;padding:8px 16px;background:var(--success);color:#fff;border:none;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:background .15s}.solution-buttons .btn-check:hover:not(:disabled){background:#4a7a4e}.solution-buttons .btn-check:disabled{opacity:.6;cursor:not-allowed}.solution-hint{display:flex;gap:16px;margin-bottom:12px;font-size:11px;color:var(--text-dim)}.solution-results{border-top:1px solid var(--border);padding-top:12px}.solution-summary{margin-bottom:12px}.summary-status{font-size:14px;font-weight:600}.summary-status.passed{color:var(--success)}.summary-status.failed{color:var(--error)}.test-results-section h4{font-size:13px;color:var(--text-dim);margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}.test-result{background:var(--bg-card);border:1px solid var(--border);border-radius:6px;margin-bottom:6px;overflow:hidden;cursor:pointer;transition:border-color .15s}.test-result:hover{border-color:var(--accent)}.test-result.passed{border-left:3px solid var(--success)}.test-result.failed{border-left:3px solid var(--error)}.test-result-header{display:flex;align-items:center;gap:8px;padding:8px 12px}.test-status{font-size:14px;font-weight:700}.test-result.passed .test-status{color:var(--success)}.test-result.failed .test-status{color:var(--error)}.test-name{font-size:13px;color:var(--text)}.test-result-details{padding:8px 12px;border-top:1px solid var(--border);background:var(--bg)}.test-io{display:flex;flex-direction:column;gap:8px}.io-section{display:flex;align-items:flex-start;gap:8px}.io-label{font-size:12px;color:var(--text-dim);font-weight:600;min-width:80px}.io-values{display:flex;flex-wrap:wrap;gap:6px}.io-value{font-family:var(--font-mono);font-size:12px;background:var(--bg-secondary);padding:2px 6px;border-radius:4px;color:var(--text)}.st-hover{max-width:420px;padding:12px 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0}.st-hover-foot{font-size:11px;color:var(--text-dim)}.st-hover-link{color:var(--accent);cursor:pointer;font-weight:600}.st-hover-link:hover{text-decoration:underline}.st-hover-rel{font-family:var(--font-mono);color:var(--accent);cursor:pointer}.st-hover-rel:hover{text-decoration:underline}.fb-docs-panel{width:440px;min-width:440px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:8px;display:flex;flex-direction:column;overflow:hidden;max-height:calc(100vh - 140px)}.fb-docs-search{display:flex;gap:8px;padding:10px;border-bottom:1px solid var(--border)}.fb-docs-search input{flex:1;padding:8px 10px;background:var(--bg);border:1px solid var(--border);border-radius:6px;font-size:13px;outline:none;color:var(--text)}.fb-docs-search input:focus{border-color:var(--accent)}.fb-docs-close{padding:4px 10px;border:1px solid var(--border);border-radius:6px;background:var(--bg-card);color:var(--text-dim);cursor:pointer}.fb-docs-close:hover{border-color:var(--accent);color:var(--text)}.fb-docs-body{display:flex;flex:1;min-height:0}.fb-docs-catalog{width:130px;min-width:130px;border-right:1px solid var(--border);padding:8px;overflow-y:auto}.fb-docs-group-title{font-size:10px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-dim);margin:10px 0 4px}.fb-docs-group:first-child .fb-docs-group-title{margin-top:0}.fb-docs-item{display:block;width:100%;text-align:left;padding:5px 8px;font-family:var(--font-mono);font-size:12px;border:none;background:none;color:var(--text);border-radius:4px;cursor:pointer}.fb-docs-item:hover{background:var(--bg-card)}.fb-docs-item.active{background:#d4652a26;color:var(--accent);font-weight:600}.fb-docs-detail{flex:1;padding:12px 14px;overflow-y:auto;min-width:0}.fb-docs-empty{color:var(--text-dim);font-size:13px;padding:20px 0}.fb-docs-head{display:flex;align-items:baseline;gap:10px;margin-bottom:6px}.fb-docs-name{font-family:var(--font-mono);font-weight:700;color:var(--accent);font-size:18px}.fb-docs-cat{font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-dim)}.fb-docs-sig{font-family:var(--font-mono);font-size:11px;background:var(--bg);border:1px solid var(--border);border-radius:4px;padding:6px 10px;margin-bottom:10px;overflow-x:auto;white-space:nowrap}.fb-docs-purpose{font-size:13px;line-height:1.6;margin-bottom:8px}.fb-docs-sec{font-size:10px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-dim);margin:14px 0 6px}.fb-docs-io{width:100%;border-collapse:collapse;font-size:12px}.fb-docs-io th{text-align:left;padding:4px 8px;background:var(--bg);color:var(--text-dim);font-weight:600;border-bottom:1px solid var(--border);font-size:10px;text-transform:uppercase}.fb-docs-io td{padding:5px 8px;border-bottom:1px solid rgba(58,58,80,.12);vertical-align:top}.fb-docs-io-name{font-family:var(--font-mono);color:var(--accent);font-weight:600}.fb-docs-io-type{font-family:var(--font-mono);color:var(--text-dim);font-size:11px}.fb-docs-example{font-family:var(--font-mono);font-size:12px;background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:10px 12px;overflow-x:auto;line-height:1.6}.fb-docs-related{display:flex;flex-wrap:wrap;gap:8px}.fb-docs-chip{font-family:var(--font-mono);font-size:12px;background:var(--bg-card);border:1px solid var(--border);border-radius:4px;padding:3px 10px;cursor:pointer;color:var(--text)}.fb-docs-chip:hover{border-color:var(--accent);color:var(--accent)}.btn-docs{padding:8px 14px;border:1px solid var(--border);border-radius:6px;background:var(--bg-card);color:var(--text);cursor:pointer;font-size:13px}.btn-docs:hover{border-color:var(--accent)}.btn-docs.active{border-color:var(--accent);color:var(--accent);font-weight:600}.timing-diagram{background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:8px}.timing-diagram .td-grid{stroke:var(--border);stroke-width:1}.timing-diagram .td-time{font-family:var(--font-mono);font-size:9px;fill:var(--text-dim)}.timing-diagram .td-label{font-family:var(--font-mono);font-size:11px;fill:var(--text)}.timing-diagram .td-wave{stroke:var(--accent);stroke-width:2;stroke-linejoin:round}.timing-diagram .td-wave-in{stroke:var(--success)}.timing-diagram .td-dot{fill:var(--accent)}.timing-diagram .td-num{font-family:var(--font-mono);font-size:9px;fill:var(--text-dim)}.timing-diagram .td-constants{display:flex;gap:12px;margin-top:6px;font-family:var(--font-mono);font-size:10px;color:var(--text-dim)}