:root {
    --bg: #0f0f14;
    --surface: #17171f;
    --surface2: #1e1e28;
    --border: rgba(255,255,255,0.07);
    --border-hover: rgba(255,255,255,0.14);
    --accent: #c8a96e;
    --accent-glow: rgba(200,169,110,0.08);
    --text: #f0ede8;
    --text-mid: #8b8880;
    --text-dim: #4a4845;
    --danger: #e05c5c;
    --safe: #5cbe8a;
    --radius: 12px;
  }
  * { margin:0; padding:0; box-sizing:border-box; }
  html, body {
    width:100%; min-height:100vh;
    background: var(--bg);
    color: var(--text);
    font-family: 'DM Sans', sans-serif;
    font-weight: 300;
    -webkit-font-smoothing: antialiased;
  }
  body::before {
    content:''; position:fixed; inset:0;
    background-image: radial-gradient(circle, rgba(255,255,255,0.025) 1px, transparent 1px);
    background-size: 28px 28px;
    pointer-events:none; z-index:0;
  }
  body::after {
    content:''; position:fixed;
    top:35%; left:50%; transform:translate(-50%,-50%);
    width:700px; height:500px;
    background: radial-gradient(ellipse, rgba(200,169,110,0.045) 0%, transparent 65%);
    pointer-events:none; z-index:0;
  }
  .page {
    position:relative; z-index:1;
    min-height:100vh;
    display:flex; flex-direction:column;
    align-items:center; justify-content:center;
    padding: 48px 20px 64px;
    gap: 14px;
  }

  /* BRAND */
  .brand {
    display:flex; flex-direction:column; align-items:center; gap:10px;
    margin-bottom:6px;
    animation: fadeUp 0.55s ease both;
  }
  .brand-row { display:flex; align-items:center; gap:10px; }
  .brand-mark { width:28px; height:28px; flex-shrink:0; }
  .brand-mark svg { width:100%; height:100%; }
  .brand-name {
    font-family:'DM Serif Display',serif;
    font-size:2.1rem; letter-spacing:-0.02em; color:var(--text); line-height:1;
  }
  .brand-name em { font-style:italic; color:var(--accent); }
  .brand-sub {
    font-family:'DM Mono',monospace; font-size:0.66rem;
    letter-spacing:0.16em; color:var(--text-dim); text-transform:uppercase;
  }

  /* CARD */
  .card {
    width:100%; max-width:500px;
    background:var(--surface);
    border:1px solid var(--border);
    border-radius:var(--radius);
    overflow:hidden;
    box-shadow: 0 1px 0 rgba(255,255,255,0.04) inset, 0 28px 56px rgba(0,0,0,0.55);
    animation: fadeUp 0.55s 0.08s ease both;
  }

  /* UPLOAD SECTION */
  .card-section { padding:26px 26px 22px; display:flex; flex-direction:column; gap:14px; }
  .field-label {
    font-family:'DM Mono',monospace; font-size:0.6rem;
    letter-spacing:0.2em; color:var(--text-dim); text-transform:uppercase; margin-bottom:4px;
  }
  .upload-zone {
    border:1px solid var(--border); border-radius:8px;
    background:var(--surface2); cursor:pointer;
    transition:border-color 0.2s, background 0.2s; position:relative; overflow:hidden;
  }
  .upload-zone:hover { border-color:var(--border-hover); background:rgba(255,255,255,0.025); }
  .upload-zone.drag-over { border-color:var(--accent); background:var(--accent-glow); }
  .upload-empty {
    display:flex; flex-direction:column; align-items:center; justify-content:center;
    gap:8px; padding:34px 20px; text-align:center;
  }
  .upload-icon-ring {
    width:42px; height:42px; border-radius:50%;
    background:rgba(200,169,110,0.1);
    display:flex; align-items:center; justify-content:center;
    margin-bottom:2px; transition:background 0.2s;
  }
  .upload-zone:hover .upload-icon-ring { background:rgba(200,169,110,0.17); }
  .upload-primary { font-size:0.86rem; font-weight:500; color:var(--text); }
  .upload-secondary { font-size:0.74rem; color:var(--text-mid); }
  .upload-secondary span { color:var(--accent); cursor:pointer; text-decoration:underline; text-underline-offset:2px; }
  #file-input { display:none; }

  .upload-preview { display:none; position:relative; }
  .upload-preview img {
    width:100%; max-height:220px; object-fit:contain; display:block;
    filter:brightness(0.88) contrast(1.06);
  }
  .preview-bar {
    position:absolute; bottom:0; left:0; right:0;
    background:linear-gradient(to top, rgba(15,15,20,0.85) 0%, transparent 100%);
    display:flex; align-items:flex-end; padding:10px 12px; pointer-events:none;
  }
  .preview-fname {
    font-family:'DM Mono',monospace; font-size:0.62rem;
    color:rgba(240,237,232,0.55); overflow:hidden; white-space:nowrap; text-overflow:ellipsis;
  }
  .preview-change {
    margin-left:auto; font-family:'DM Mono',monospace; font-size:0.6rem;
    color:var(--accent); cursor:pointer; pointer-events:all; flex-shrink:0;
  }

  /* BUTTONS */
  .btn-primary {
    width:100%; padding:13px 20px;
    background:var(--accent); color:#0f0f14;
    font-family:'DM Sans',sans-serif; font-weight:500; font-size:0.87rem;
    letter-spacing:0.02em; border:none; border-radius:8px; cursor:pointer;
    display:flex; align-items:center; justify-content:center; gap:7px;
    transition:opacity 0.2s, transform 0.15s, box-shadow 0.2s;
    box-shadow:0 4px 20px rgba(200,169,110,0.22);
  }
  .btn-primary:hover:not(:disabled) { opacity:0.9; transform:translateY(-1px); box-shadow:0 6px 24px rgba(200,169,110,0.32); }
  .btn-primary:active:not(:disabled) { transform:translateY(0); }
  .btn-primary:disabled { opacity:0.28; cursor:not-allowed; box-shadow:none; }
  .btn-ghost {
    width:100%; padding:10px 20px; background:transparent;
    color:var(--text-mid); font-family:'DM Sans',sans-serif; font-weight:400;
    font-size:0.81rem; border:1px solid var(--border); border-radius:8px;
    cursor:pointer; transition:border-color 0.2s, color 0.2s;
  }
  .btn-ghost:hover { border-color:var(--border-hover); color:var(--text); }

  /* DIVIDER */
  .divider { height:1px; background:var(--border); }

  /* PROCESSING */
  .proc-section {
    display:none; padding:28px 26px;
    flex-direction:column; align-items:center; gap:18px;
  }
  .proc-section.active { display:flex; }
  .spinner {
    width:32px; height:32px;
    border:1.5px solid var(--border); border-top-color:var(--accent);
    border-radius:50%; animation:spin 0.85s linear infinite;
  }
  @keyframes spin { to { transform:rotate(360deg); } }
  .proc-lbl {
    font-family:'DM Mono',monospace; font-size:0.67rem;
    color:var(--text-mid); letter-spacing:0.14em; text-transform:uppercase;
  }
  .proc-steps { width:100%; display:flex; flex-direction:column; gap:9px; }
  .prow {
    display:flex; align-items:center; gap:10px;
    font-family:'DM Mono',monospace; font-size:0.59rem; color:var(--text-dim); letter-spacing:0.06em;
  }
  .prow .bar { flex:1; height:2px; background:var(--border); border-radius:1px; overflow:hidden; }
  .prow .bfill { height:100%; background:var(--accent); width:0%; transition:width 0.4s ease; }
  .prow .pval { width:26px; text-align:right; color:var(--text-mid); }

  /* RESULT */
  .result-section {
    display:none; padding:26px 26px 22px;
    flex-direction:column; gap:18px;
  }
  .result-section.active { display:flex; }
  .verdict {
    border-radius:8px; padding:16px 18px;
    display:flex; flex-direction:column; gap:3px;
  }
  .verdict.tumor    { background:rgba(224,92,92,0.08); border:1px solid rgba(224,92,92,0.2); }
  .verdict.no-tumor { background:rgba(92,190,138,0.07); border:1px solid rgba(92,190,138,0.18); }
  .verdict-eye {
    font-family:'DM Mono',monospace; font-size:0.58rem;
    letter-spacing:0.2em; text-transform:uppercase; color:var(--text-dim);
  }
  .verdict-main {
    font-family:'DM Serif Display',serif; font-size:1.45rem; letter-spacing:-0.01em;
  }
  .verdict.tumor .verdict-main    { color:var(--danger); }
  .verdict.no-tumor .verdict-main { color:var(--safe); }

  .conf-head { display:flex; align-items:baseline; justify-content:space-between; margin-bottom:9px; }
  .conf-key { font-family:'DM Mono',monospace; font-size:0.6rem; color:var(--text-dim); letter-spacing:0.15em; text-transform:uppercase; }
  .conf-num { font-family:'DM Serif Display',serif; font-size:1.75rem; color:var(--text); letter-spacing:-0.02em; }
  .conf-num sup { font-family:'DM Sans',sans-serif; font-size:0.75rem; font-weight:300; color:var(--text-mid); }
  .conf-track { height:3px; background:var(--border); border-radius:2px; overflow:hidden; }
  .conf-fill { height:100%; border-radius:2px; width:0%; transition:width 1.1s cubic-bezier(0.16,1,0.3,1); }
  .conf-fill.tf { background:var(--danger); }
  .conf-fill.sf { background:var(--safe); }

  .meta-grid { display:grid; grid-template-columns:1fr 1fr; gap:7px; }
  .meta-cell { background:var(--surface2); border:1px solid var(--border); border-radius:6px; padding:9px 11px; }
  .meta-key { font-family:'DM Mono',monospace; font-size:0.54rem; color:var(--text-dim); letter-spacing:0.14em; text-transform:uppercase; margin-bottom:2px; }
  .meta-val { font-family:'DM Mono',monospace; font-size:0.78rem; color:var(--text); letter-spacing:0.02em; }

  /* FOOTER */
  .foot {
    font-family:'DM Mono',monospace; font-size:0.61rem;
    color:var(--text-dim); letter-spacing:0.07em; text-align:center;
    animation: fadeUp 0.55s 0.16s ease both;
  }
  .foot a { color:var(--text-mid); text-decoration:none; }
  .foot a:hover { color:var(--accent); }
  .sep { margin:0 8px; }

  /* ERROR */
  .err-bar {
    width:100%; max-width:500px;
    background:rgba(224,92,92,0.09); border:1px solid rgba(224,92,92,0.22);
    border-radius:8px; padding:9px 14px;
    font-family:'DM Mono',monospace; font-size:0.63rem;
    color:var(--danger); letter-spacing:0.07em; display:none;
    animation:fadeUp 0.3s ease;
  }

  @keyframes fadeUp {
    from { opacity:0; transform:translateY(10px); }
    to   { opacity:1; transform:translateY(0); }
  }