:root{
  --accent:#F43676;
  --bg:#ffffff;
  --text:#222;
  --muted:#666;
  --card-radius:14px;
  --max-width:900px;
  --gap:12px;
}
.rank-calculator{
  max-width:var(--max-width);
  margin:18px auto;
  padding:18px;
  background:var(--bg);
  color:var(--text);
  font-family:Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  border-radius:var(--card-radius);
  box-shadow:0 6px 24px rgba(0,0,0,0.08);
}

/* Header */
.rc-header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.rc-header h2{margin:0;font-size:1.25rem;color:var(--accent)}
.rc-controls{display:flex;align-items:center;gap:8px}

/* Dark mode */
.rank-calculator.dark{
  background:#0f1113;color:#e8eef6;
  box-shadow:0 6px 24px rgba(0,0,0,0.6);
}
.rank-calculator.dark h1{color:#ff9ec8}

/* Subjects layout */
.subject-row{display:flex;gap:10px;align-items:center;padding:10px;border-radius:10px;border:1px solid rgba(0,0,0,0.06);margin-bottom:10px}
.rank-calculator.dark .subject-row{border-color:rgba(255,255,255,0.06)}
.subject-row select{min-width:150px;padding:8px;border-radius:8px;border:1px solid #ddd}
.credits{display:flex;gap:8px;align-items:center}
.credits label{font-size:0.85rem;color:var(--muted)}
.credits input{width:78px;padding:8px;border-radius:8px;border:1px solid #ddd;text-align:center}

/* Buttons */
.btn{background:var(--accent);color:#fff;border:none;padding:8px 12px;border-radius:8px;cursor:pointer;font-weight:600}
.btn.ghost{background:transparent;color:var(--accent);border:1px solid rgba(0,0,0,0.06)}
.btn.small{padding:6px 8px;font-size:0.9rem;border-radius:6px}
.btn.primary{padding:10px 16px;font-size:1rem}
.rank-calculator.dark .btn.ghost{color:#ffd0e0;border-color:rgba(255,255,255,0.06)}

/* Actions, settings */
.rc-actions{display:flex;gap:10px;margin:12px 0}
.rc-settings{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.rc-settings label{display:flex;align-items:center;gap:8px;font-size:0.95rem}

/* Results */
.results{margin-top:14px;padding:14px;border-radius:10px;border:1px solid rgba(0,0,0,0.05);background:linear-gradient(180deg,#fff,#fff)}
.rank-calculator.dark .results{background:linear-gradient(180deg,#121416,#0b0b0b)}
.result-summary h2{margin:0 0 8px 0;color:var(--accent)}
.progress-wrap{margin:8px 0}
.progress-bar{background:rgba(0,0,0,0.06);height:14px;border-radius:10px;overflow:hidden}
.progress-bar div{height:100%;width:0;background:linear-gradient(90deg,var(--accent),#ff7aa2)}

/* Breakdown list */
.breakdown ul{margin:0;padding-left:18px}

/* Tooltip (click) */
.tooltip{
  position:fixed;z-index:9999;max-width:320px;padding:10px;background:#111;color:#fff;border-radius:10px;box-shadow:0 8px 30px rgba(0,0,0,0.4)
}
.rank-calculator.dark .tooltip{background:#222}

/* Footer */
.rc-footer{margin-top:12px;color:var(--muted);font-size:0.9rem}

/* Responsive */
@media (max-width:720px){
  .subject-row{flex-direction:column;align-items:flex-start}
  .credits input{width:100%}
  .rc-settings{flex-direction:column}
}