:root{
    --void:#14171c;
    --panel:#1b2028;
    --panel-2:#20262f;
    --panel-3:#262d38;
    --steel:#323a46;
    --signal:#ff7a33;
    --signal-dim:rgba(255,122,51,.14);
    --mint:#35d399;
    --mint-dim:rgba(53,211,153,.14);
    --danger:#ff5c5c;
    --danger-dim:rgba(255,92,92,.12);
    --text-hi:#eceef1;
    --text-lo:#8b93a1;
    --text-faint:#5b6270;
    --radius:14px;
    --radius-sm:9px;
  }

  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    background:
      radial-gradient(1200px 600px at 15% -10%, rgba(255,122,51,.08), transparent 60%),
      radial-gradient(900px 500px at 100% 0%, rgba(53,211,153,.05), transparent 55%),
      var(--void);
    color:var(--text-hi);
    font-family:'Inter',system-ui,sans-serif;
    -webkit-font-smoothing:antialiased;
    line-height:1.5;
    min-height:100vh;
  }
  ::selection{background:var(--signal-dim);color:var(--text-hi);}

  a{color:var(--signal);}
  h1,h2,h3{font-family:'Space Grotesk',system-ui,sans-serif;margin:0;letter-spacing:-0.01em;}
  .mono{font-family:'JetBrains Mono',ui-monospace,monospace;}

  button{font-family:inherit;cursor:pointer;}
  button:focus-visible,
  input:focus-visible,
  label:focus-within{
    outline:2px solid var(--signal);
    outline-offset:2px;
  }
  @media (prefers-reduced-motion: reduce){
    *{animation-duration:.001ms !important; transition-duration:.001ms !important;}
  }

  .wrap{max-width:920px;margin:0 auto;padding:56px 24px 96px;}

  /* ---------- Ruler divider — the recurring "measurement" motif ---------- */
  .ruler{width:100%;height:22px;margin:40px 0;opacity:.55;}
  .ruler svg{width:100%;height:100%;display:block;}

  /* ---------- Hero ---------- */
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.08em;
    text-transform:uppercase;color:var(--signal);
    background:var(--signal-dim);border:1px solid rgba(255,122,51,.3);
    padding:6px 12px;border-radius:999px;margin-bottom:22px;
  }
  .eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--signal);}

  h1.headline{font-size:clamp(34px,5vw,54px);font-weight:700;line-height:1.05;max-width:14ch;}
  h1.headline .accent{color:var(--signal);}
  .sub{font-size:17px;color:var(--text-lo);max-width:52ch;margin-top:18px;}

  .privacy-strip{
    margin-top:28px;
    display:flex;align-items:flex-start;gap:10px;
    font-size:13.5px;color:var(--text-lo);
    border-left:2px solid var(--mint);
    padding:10px 14px;background:var(--mint-dim);border-radius:0 8px 8px 0;
  }
  .privacy-strip strong{color:var(--text-hi);font-weight:600;}

  /* ---------- Card shell ---------- */
  .card{
    background:linear-gradient(180deg,var(--panel-2),var(--panel));
    border:1px solid var(--steel);
    border-radius:var(--radius);
    padding:28px;
  }
  .section-label{
    font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.08em;
    text-transform:uppercase;color:var(--text-faint);margin-bottom:14px;
    display:flex;align-items:center;gap:10px;
  }
  .section-label .n{color:var(--signal);}

  /* ---------- Dropzone ---------- */
  .dropzone{
    border:1.5px dashed var(--steel);
    border-radius:var(--radius);
    padding:44px 24px;
    text-align:center;
    transition:border-color .15s ease, background .15s ease;
    background:var(--panel-2);
  }
  .dropzone.drag-over{border-color:var(--signal);background:var(--signal-dim);}
  .dropzone.has-file{border-style:solid;border-color:var(--mint);}
  .drop-icon{width:42px;height:42px;margin:0 auto 16px;color:var(--text-lo);}
  .drop-title{font-size:16px;font-weight:600;color:var(--text-hi);}
  .drop-sub{font-size:13.5px;color:var(--text-lo);margin-top:4px;}
  .or-divider{font-size:12px;color:var(--text-faint);margin:16px 0;text-transform:uppercase;letter-spacing:.08em;}

  .btn{
    border-radius:10px;border:1px solid transparent;
    font-weight:600;font-size:14.5px;padding:12px 22px;
    display:inline-flex;align-items:center;gap:8px;
    transition:transform .1s ease, filter .15s ease, background .15s ease;
  }
  .btn:active{transform:scale(.98);}
  .btn-primary{background:var(--signal);color:#1a1207;}
  .btn-primary:hover{filter:brightness(1.08);}
  .btn-primary:disabled{background:var(--steel);color:var(--text-faint);cursor:not-allowed;filter:none;}
  .btn-ghost{background:transparent;border-color:var(--steel);color:var(--text-hi);}
  .btn-ghost:hover{border-color:var(--text-lo);}
  .btn-block{width:100%;justify-content:center;}

  input[type=file]{display:none;}

  .file-chip{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    background:var(--panel-3);border:1px solid var(--steel);
    border-radius:10px;padding:12px 16px;margin-top:18px;text-align:left;
  }
  .file-chip .meta{display:flex;flex-direction:column;gap:2px;min-width:0;}
  .file-chip .name{font-size:14px;font-weight:600;color:var(--text-hi);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:360px;}
  .file-chip .size{font-size:12.5px;color:var(--text-lo);}
  .file-chip .clear{background:none;border:none;color:var(--text-faint);font-size:13px;text-decoration:underline;padding:4px;}
  .file-chip .clear:hover{color:var(--danger);}

  /* ---------- Mode cards ---------- */
  .modes{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:16px;}
  @media (max-width:680px){.modes{grid-template-columns:1fr;}}
  .mode{
    position:relative;
    border:1px solid var(--steel);border-radius:var(--radius-sm);
    padding:18px 16px;background:var(--panel-2);
    display:block;transition:border-color .15s ease, background .15s ease;
  }
  .mode input{position:absolute;opacity:0;pointer-events:none;}
  .mode .tag{
    font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text-faint);
    text-transform:uppercase;letter-spacing:.06em;
  }
  .mode .title{font-weight:600;font-size:15.5px;margin-top:6px;color:var(--text-hi);}
  .mode .desc{font-size:12.8px;color:var(--text-lo);margin-top:6px;line-height:1.45;}
  .mode .gauge-preview{display:flex;gap:3px;margin-top:14px;align-items:flex-end;height:20px;}
  .mode .gauge-preview span{flex:1;background:var(--steel);border-radius:2px;}
  .mode:hover{border-color:var(--text-faint);cursor:pointer;}
  .mode.active{border-color:var(--signal);background:var(--signal-dim);}
  .mode.active .gauge-preview span{background:var(--signal);}
  .mode.active .tag{color:var(--signal);}

  /* ---------- Steps ---------- */
  .steps{display:flex;flex-direction:column;gap:0;margin-top:18px;}
  .step{
    display:flex;align-items:center;gap:14px;padding:12px 4px;
    border-bottom:1px solid var(--steel);
  }
  .step:last-child{border-bottom:none;}
  .step .dot{
    width:22px;height:22px;border-radius:50%;flex-shrink:0;
    display:flex;align-items:center;justify-content:center;
    border:1.5px solid var(--steel);color:var(--text-faint);
    font-size:11px;font-family:'JetBrains Mono',monospace;
    transition:all .2s ease;
  }
  .step.active .dot{border-color:var(--signal);color:var(--signal);animation:pulse 1.1s ease-in-out infinite;}
  .step.done .dot{border-color:var(--mint);background:var(--mint);color:#0d1a14;}
  .step .label{font-size:14px;color:var(--text-lo);}
  .step.active .label{color:var(--text-hi);font-weight:600;}
  .step.done .label{color:var(--text-hi);}
  @keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(255,122,51,.35);}50%{box-shadow:0 0 0 5px rgba(255,122,51,0);}}

  .progress-track{height:6px;border-radius:4px;background:var(--steel);overflow:hidden;margin-top:6px;}
  .progress-fill{height:100%;background:var(--signal);width:0%;transition:width .25s ease;}

  /* ---------- Results / gauge ---------- */
  .results{margin-top:8px;}
  .stat-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px;margin-bottom:22px;}
  @media (max-width:680px){.stat-row{grid-template-columns:1fr;}}
  .stat{background:var(--panel-3);border:1px solid var(--steel);border-radius:var(--radius-sm);padding:16px;}
  .stat .k{font-size:11.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint);font-family:'JetBrains Mono',monospace;}
  .stat .v{font-size:24px;font-weight:600;margin-top:6px;font-family:'JetBrains Mono',monospace;}
  .stat.saved .v{color:var(--mint);}

  .gauge{margin-top:6px;}
  .gauge-row{display:flex;align-items:center;gap:14px;margin-bottom:10px;}
  .gauge-row .g-label{width:92px;font-size:12px;color:var(--text-lo);font-family:'JetBrains Mono',monospace;flex-shrink:0;}
  .gauge-bar-track{flex:1;height:26px;background:var(--panel-3);border:1px solid var(--steel);border-radius:6px;overflow:hidden;position:relative;}
  .gauge-bar{height:100%;border-radius:5px;transition:width 1s cubic-bezier(.16,1,.3,1);}
  .gauge-bar.original{background:var(--text-faint);}
  .gauge-bar.compressed{background:linear-gradient(90deg,var(--signal),var(--mint));}

  .error-banner{
    margin-top:16px;padding:14px 16px;border-radius:10px;
    background:var(--danger-dim);border:1px solid rgba(255,92,92,.35);
    color:#ffb3b3;font-size:13.5px;display:none;
  }
  .error-banner.show{display:block;}

  .status-msg{font-size:13px;color:var(--text-lo);margin-top:10px;min-height:18px;}

  footer{margin-top:56px;text-align:center;color:var(--text-faint);font-size:12.5px;}

  section{margin-top:36px;}
  .hidden{display:none !important;}