*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0f0f0f;--surface:#1a1a1a;--surface2:#242424;--border:#333;
  --text:#e8e0d8;--text2:#a89888;--accent:#c8956c;--accent2:#e8b88a;
  --espresso:#6b3a2a;--green:#5a8a5a;--red:#a85a5a;
  --radius:12px;--shadow:0 2px 12px rgba(0,0,0,.4);
}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}
.container{max-width:900px;margin:0 auto;padding:24px 16px}
header{text-align:center;padding:40px 0 32px}
h1{font-size:2rem;color:var(--accent2);font-weight:700;letter-spacing:-.5px}
.subtitle{color:var(--text2);margin-top:8px;font-size:.95rem}
h2{font-size:1.25rem;color:var(--accent);margin-bottom:16px;font-weight:600}
section{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:24px;box-shadow:var(--shadow)}
.section-desc{color:var(--text2);font-size:.9rem;margin:-8px 0 16px}
.converter-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:start}
.converter-col{display:flex;flex-direction:column;gap:8px}
.converter-col label{font-size:.8rem;color:var(--text2);text-transform:uppercase;letter-spacing:.5px;font-weight:600}
.converter-col select,.converter-col input{background:var(--surface2);border:1px solid var(--border);color:var(--text);padding:10px 12px;border-radius:8px;font-size:1rem;outline:none;transition:border-color .2s}
.converter-col select:focus,.converter-col input:focus{border-color:var(--accent)}
.converter-arrow{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding-top:24px}
#micron-display{font-size:.85rem;color:var(--accent);font-weight:600;white-space:nowrap;background:var(--surface2);padding:6px 14px;border-radius:20px;border:1px solid var(--border)}
#swap-btn{background:none;border:1px solid var(--border);color:var(--accent);font-size:1.4rem;cursor:pointer;border-radius:50%;width:40px;height:40px;display:flex;align-items:center;justify-content:center;transition:all .2s}
#swap-btn:hover{background:var(--surface2);border-color:var(--accent)}
.result-box{background:var(--surface2);border:2px solid var(--accent);border-radius:8px;padding:12px;text-align:center;min-height:46px;display:flex;align-items:center;justify-content:center}
#result-value{font-size:1.3rem;font-weight:700;color:var(--accent2);display:flex;flex-direction:column;align-items:center;gap:2px}
#result-value .click-count{font-size:.85rem;font-weight:600;color:var(--text2)}
.input-hint,.result-hint{font-size:.78rem;color:var(--text2);min-height:1.2em}
.micron-converter-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:start}
#micron-result-value{font-size:1.3rem;font-weight:700;color:var(--accent2);display:flex;flex-direction:column;align-items:center;gap:2px}
#micron-result-value .click-count{font-size:.85rem;font-weight:600;color:var(--text2)}
#micron-category{font-size:.85rem;color:var(--accent);font-weight:600;white-space:nowrap;background:var(--surface2);padding:6px 14px;border-radius:20px;border:1px solid var(--border)}
.brew-selector{margin-bottom:16px}
.brew-selector select{background:var(--surface2);border:1px solid var(--border);color:var(--text);padding:10px 12px;border-radius:8px;font-size:1rem;width:100%;outline:none}
.brew-selector select:focus{border-color:var(--accent)}
.brew-results{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}
.brew-result-item{background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:14px 16px}
.brew-result-item .grinder-name{font-weight:600;font-size:.9rem}
.brew-result-item .grinder-range{color:var(--accent);font-weight:600;font-size:.95rem;margin-top:4px}
.brew-result-item .micron-range{color:var(--text2);font-size:.78rem;margin-top:2px}
.brew-result-item .espresso-note{color:var(--red);font-size:.75rem;margin-top:4px}
.espresso-note-inline{cursor:help}
.grinder-selector{margin-bottom:16px}
.grinder-selector select{background:var(--surface2);border:1px solid var(--border);color:var(--text);padding:10px 12px;border-radius:8px;font-size:1rem;width:100%;outline:none}
.grinder-selector select:focus{border-color:var(--accent)}
.reference-table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.9rem}
th{text-align:left;padding:10px 12px;border-bottom:2px solid var(--border);color:var(--accent);font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.5px}
td{padding:10px 12px;border-bottom:1px solid var(--border)}
tr:hover td{background:var(--surface2)}
.micron-scale{display:flex;flex-direction:column;gap:6px}
.scale-row{display:flex;align-items:center;gap:12px;padding:4px 0}
.scale-label{width:110px;font-size:.82rem;font-weight:600;text-align:right;flex-shrink:0}
.scale-bar-wrap{flex:1;height:22px;background:var(--surface2);border-radius:4px;position:relative;overflow:hidden}
.scale-bar{height:100%;border-radius:4px;position:absolute}
.scale-range{font-size:.75rem;color:var(--text2);width:110px;flex-shrink:0}
.scale-marker-wrap{position:relative}
.scale-marker{position:absolute;top:0;bottom:0;width:2px;background:var(--accent2);z-index:2;pointer-events:none;transition:left .2s ease;border-radius:1px;box-shadow:0 0 6px rgba(232,184,138,.5)}
.scale-marker::after{content:attr(data-label);position:absolute;top:-18px;left:50%;transform:translateX(-50%);font-size:.65rem;color:var(--accent2);white-space:nowrap;font-weight:600}
.visit-counter{display:flex;justify-content:center;align-items:center;margin-bottom:16px}
.counter-item{display:flex;flex-direction:column;align-items:center;gap:2px}
.counter-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.5px;color:var(--text2)}
.counter-value{font-size:1rem;font-weight:700;color:var(--accent)}
footer{text-align:center;padding:32px 0 16px;color:var(--text2);font-size:.8rem}
footer a{color:var(--accent);text-decoration:none}
footer a:hover{text-decoration:underline}
@media(max-width:640px){
  .converter-grid,.micron-converter-grid{grid-template-columns:1fr;gap:16px}
  .converter-arrow{flex-direction:row;padding:0}
  h1{font-size:1.5rem}
  section{padding:20px 16px}
  .brew-results{grid-template-columns:1fr}
  .scale-label{width:80px;font-size:.75rem}
  .scale-range{width:90px;font-size:.7rem}
}

/* Interactive table rows */
.reference-table-wrap tr[data-method]{cursor:pointer;transition:background .15s}
.reference-table-wrap tr[data-method]:hover,.reference-table-wrap tr[data-method]:focus{background:rgba(200,149,108,.12);outline:none}
.reference-table-wrap tr[data-method]:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}

/* Focus-visible styles for keyboard navigation */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
select:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:0;box-shadow:0 0 0 3px rgba(200,149,108,.25)}
button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;box-shadow:0 0 0 3px rgba(200,149,108,.25)}
#swap-btn:focus-visible{outline-offset:2px;border-radius:50%}
a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}