:root{--bg: #f3f5fa;--bg-elevated: #ffffff;--bg-card: #ffffff;--border: #e1e5ee;--text: #1c2333;--text-dim: #64748b;--accent: #2454db;--accent-2: #0891b2;--success: #157a3e;--danger: #c0271c;--warning: #b45309;--radius: 14px;--radius-sm: 8px;--shadow: 0 6px 24px rgba(28, 35, 51, .07);--font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:linear-gradient(180deg,#eef1f8 0%,#f6f7fb 320px,var(--bg) 100%);color:var(--text);font-family:var(--font-sans)}a{color:var(--accent)}button{font-family:inherit;cursor:pointer}input,textarea,select{font-family:inherit}.page{min-height:100%;display:flex;flex-direction:column}.center-page{min-height:100%;display:flex;align-items:center;justify-content:center;padding:24px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}.stack{display:flex;flex-direction:column;gap:16px}.field-label{font-size:13px;color:var(--text-dim);margin-bottom:6px;display:block}.text-input{width:100%;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 14px;color:var(--text);font-size:15px;outline:none;transition:border-color .15s ease,box-shadow .15s ease}.text-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #2454db1f}.text-input.mono{font-family:var(--font-mono);letter-spacing:.5px}.btn{border:none;border-radius:var(--radius-sm);padding:12px 20px;font-size:15px;font-weight:600;transition:transform .1s ease,opacity .15s ease,box-shadow .15s ease}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;box-shadow:0 4px 14px #2454db40}.btn-secondary{background:var(--bg-elevated);color:var(--text);border:1px solid var(--border)}.btn-danger{background:var(--danger);color:#fff}.errors{color:var(--danger);font-size:13px;margin:4px 0 0;padding:0;list-style:none}.badge{display:inline-flex;align-items:center;gap:6px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:999px;padding:6px 12px;font-size:13px;color:var(--text-dim)}.badge-warning{color:var(--warning);border-color:var(--warning);background:#b4530914;font-weight:600}.hint-banner{background:linear-gradient(135deg,#2454db12,#0891b20f);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;color:var(--text)}.warning-box{background:#c0271c0f;border:1px solid var(--danger);border-radius:var(--radius);padding:18px 20px;color:var(--text)}.progress-dots{display:flex;gap:8px;justify-content:center}.progress-dot{width:10px;height:10px;border-radius:50%;background:var(--border)}.progress-dot.done{background:var(--success)}.progress-dot.active{background:var(--accent)}.dashboard-header{padding:24px 32px;border-bottom:1px solid var(--border);background:var(--bg-elevated);display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}.dashboard-title{font-size:20px;font-weight:700;margin:0 0 6px}.dashboard-body{flex:1;padding:32px}.password-wall{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}.trainee-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow)}.trainee-card-header{display:flex;align-items:center;justify-content:space-between}.trainee-name{font-weight:700;font-size:16px}.password-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;display:flex;align-items:center;justify-content:space-between;gap:10px}.password-value{font-family:var(--font-mono);font-size:15px;letter-spacing:.5px;word-break:break-all}.recall-indicator{font-size:13px;display:flex;align-items:center;gap:6px;flex-shrink:0}.recall-indicator.pending{color:var(--text-dim)}.recall-indicator.correct{color:var(--success)}.recall-indicator.wrong{color:var(--danger)}.recall-attempt-value{font-family:var(--font-mono);font-size:12px;color:var(--danger)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;padding:60px 20px;text-align:center;color:var(--text-dim)}.join-url-box{display:flex;align-items:center;gap:10px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 16px;font-family:var(--font-mono);color:var(--text)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a73;display:flex;align-items:center;justify-content:center;z-index:50}.session-list-item{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-elevated);text-decoration:none;color:var(--text);box-shadow:var(--shadow)}.checkbox-row{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-dim)}.lobby-layout{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}@media(max-width:760px){.lobby-layout{grid-template-columns:1fr}}.lobby-roster{padding:24px}.lobby-roster-header{margin-bottom:14px}.lobby-roster-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;max-height:360px;overflow-y:auto}.lobby-roster-item{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px}.lobby-dot{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 0 4px #157a3e24;flex-shrink:0}.lobby-pulse{width:16px;height:16px;border-radius:50%;background:var(--accent);margin:0 auto 4px;animation:lobby-pulse-anim 1.8s ease-out infinite}@keyframes lobby-pulse-anim{0%{box-shadow:0 0 #2454db66}70%{box-shadow:0 0 0 18px #2454db00}to{box-shadow:0 0 #2454db00}}