:root{
    --black:#000000;
    --white:#FFFFFF;
    --gray:#A0A0A0;
    --gray-dark:#6b6b6b;
    --red:#E63946;
    --red-deep:#B91C35;
    --panel:#0d0d0d;
    --border:rgba(255,255,255,0.1);
  }
  *{ box-sizing:border-box; }
  body{
    margin:0;
    min-height:100vh;
    background:var(--black);
    color:var(--white);
    font-family:-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    -webkit-font-smoothing:antialiased;
  }

  /* ---------- Login ---------- */
  .login-screen{
    min-height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    padding:24px;
  }
  .login-card{
    width:100%;
    max-width:340px;
    text-align:center;
  }
  .login-heart{
    font-size:28px;
    color:var(--red);
    margin-bottom:6px;
  }
  .login-title{
    font-size:13px;
    letter-spacing:0.14em;
    color:var(--gray);
    margin-bottom:32px;
    text-transform:uppercase;
  }
  .login-input{
    width:100%;
    background:transparent;
    border:none;
    border-bottom:1px solid var(--border);
    color:var(--white);
    font-size:15px;
    padding:10px 4px;
    margin-bottom:18px;
    outline:none;
  }
  .login-input:focus{ border-bottom-color:var(--red); }
  .login-btn{
    width:100%;
    background:var(--white);
    color:var(--black);
    border:none;
    border-radius:100px;
    padding:12px;
    font-size:14px;
    font-weight:600;
    cursor:pointer;
    margin-top:8px;
  }
  .login-btn:active{ transform:scale(0.98); }
  .login-error{
    color:var(--red);
    font-size:12px;
    margin-top:14px;
    min-height:16px;
  }
  .login-note{
    color:var(--gray-dark);
    font-size:11px;
    margin-top:28px;
    line-height:1.5;
  }

  /* ---------- Dashboard shell ---------- */
  .dashboard{ display:none; max-width:640px; margin:0 auto; padding:20px 18px 60px; }
  .dashboard.show{ display:block; }

  .dash-header{
    display:flex;
    align-items:center;
    justify-content:space-between;
    margin-bottom:22px;
  }
  .dash-title{
    font-size:14px;
    font-weight:700;
    letter-spacing:0.1em;
  }
  .dash-title .heart-red{ color:var(--red); }
  .signout-btn{
    background:none;
    border:1px solid var(--border);
    color:var(--gray);
    border-radius:100px;
    padding:6px 14px;
    font-size:12px;
    cursor:pointer;
  }

  .mode-switch{
    display:flex;
    background:var(--panel);
    border:1px solid var(--border);
    border-radius:12px;
    padding:4px;
    margin-bottom:22px;
  }
  .mode-btn{
    flex:1;
    background:none;
    border:none;
    color:var(--gray);
    padding:10px;
    font-size:13px;
    font-weight:600;
    letter-spacing:0.04em;
    border-radius:9px;
    cursor:pointer;
  }
  .mode-btn.active{ background:rgba(255,255,255,0.08); color:var(--white); }

  .panel{
    background:var(--panel);
    border:1px solid var(--border);
    border-radius:16px;
    padding:20px;
    margin-bottom:16px;
  }
  .panel-label{
    font-size:11px;
    letter-spacing:0.1em;
    color:var(--gray-dark);
    text-transform:uppercase;
    margin-bottom:14px;
  }

  .status-row{ display:flex; align-items:center; gap:10px; margin-bottom:16px; }
  .status-dot{ width:9px; height:9px; border-radius:50%; background:var(--gray-dark); flex-shrink:0; }
  .status-dot.active{ background:#3ddc84; box-shadow:0 0 8px rgba(61,220,132,0.6); }
  .status-dot.responded{ background:var(--red); animation:pulseDot 1.4s ease-in-out infinite; }
  @keyframes pulseDot{ 0%,100%{ opacity:1; } 50%{ opacity:0.4; } }
  .status-text{ font-size:14px; font-weight:600; }

  .progress-row{ margin-bottom:14px; }
  .progress-track{
    width:100%; height:6px; border-radius:3px;
    background:rgba(255,255,255,0.08); overflow:hidden; margin-bottom:8px;
  }
  .progress-fill{
    height:100%; border-radius:3px;
    background:linear-gradient(90deg, var(--red-deep), var(--red));
    transition:width 0.5s ease;
  }
  .progress-caption{ font-size:12px; color:var(--gray); }

  .detail-grid{ display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:16px; }
  .detail-item .k{ font-size:11px; color:var(--gray-dark); margin-bottom:3px; }
  .detail-item .v{ font-size:13px; }

  .response-banner{
    margin-top:16px;
    padding:14px;
    border-radius:12px;
    background:rgba(230,57,70,0.12);
    border:1px solid rgba(230,57,70,0.35);
    text-align:center;
    display:none;
  }
  .response-banner.show{ display:block; }
  .response-banner .big{ font-size:20px; font-weight:700; color:var(--red); }

  /* Activity feed */
  .activity-item{
    display:flex; justify-content:space-between; gap:10px;
    padding:9px 0; border-bottom:1px solid rgba(255,255,255,0.06);
    font-size:13px;
  }
  .activity-item:last-child{ border-bottom:none; }
  .activity-type{ color:var(--white); }
  .activity-time{ color:var(--gray-dark); font-size:11px; white-space:nowrap; }
  .empty-note{ color:var(--gray-dark); font-size:13px; text-align:center; padding:12px 0; }

  /* Demo list */
  .demo-toolbar{ display:flex; gap:8px; margin-bottom:14px; }
  .demo-btn{
    flex:1;
    background:rgba(255,255,255,0.08);
    border:1px solid var(--border);
    color:var(--white);
    border-radius:10px;
    padding:10px;
    font-size:13px;
    cursor:pointer;
  }
  .demo-run-row{
    display:flex; justify-content:space-between; align-items:center;
    padding:11px 0; border-bottom:1px solid rgba(255,255,255,0.06);
    cursor:pointer; font-size:13px;
  }
  .demo-run-row:last-child{ border-bottom:none; }
  .demo-run-row.selected{ color:var(--red); }
  .demo-run-row .rid{ font-family:monospace; font-size:11px; color:var(--gray); }

  .link-box{
    display:flex; gap:8px; margin-top:12px;
    background:rgba(255,255,255,0.05); border-radius:10px; padding:10px;
  }
  .link-box input{
    flex:1; background:none; border:none; color:var(--gray); font-size:11px; outline:none;
  }
  .link-box button{
    background:var(--white); color:var(--black); border:none; border-radius:8px;
    padding:6px 12px; font-size:12px; cursor:pointer;
  }

  .delete-run-btn{
    margin-top:16px; width:100%; background:none; border:1px solid rgba(230,57,70,0.4);
    color:var(--red); border-radius:10px; padding:10px; font-size:13px; cursor:pointer;
  }

  .config-warning{
    background:rgba(230,57,70,0.1); border:1px solid rgba(230,57,70,0.3);
    border-radius:12px; padding:16px; font-size:13px; color:var(--gray); line-height:1.5;
  }

  .field-row{ margin-bottom:14px; }
  .field-label{
    display:block; font-size:11px; color:var(--gray-dark);
    text-transform:uppercase; letter-spacing:0.08em; margin-bottom:6px;
  }
  .field-input{
    width:100%; background:rgba(255,255,255,0.06); border:1px solid var(--border);
    border-radius:9px; padding:10px 12px; color:var(--white); font-size:14px; outline:none;
  }
  .field-textarea{
    resize:vertical;
    min-height:74px;
    font-family:inherit;
    line-height:1.4;
  }
  .field-input:focus{ border-color:var(--red); }
  .password-row{ display:flex; gap:8px; }
  .password-row .field-input{ flex:1; }
  .password-toggle-btn{
    background:rgba(255,255,255,0.08); border:1px solid var(--border); color:var(--gray);
    border-radius:9px; padding:0 14px; font-size:12px; cursor:pointer;
  }
  .access-saved-note{
    font-size:12px; color:#3ddc84; margin-top:10px; opacity:0; transition:opacity 0.3s ease;
  }
  .access-saved-note.show{ opacity:1; }