:root{
  --accent: #F43676;
  --bg: #ffffff;
  --text: #222;
  --muted: #6b6b6b;
  --card: #fff;
  --danger: #d9534f;
  --radius: 12px;
}

/* Dark theme */
.utar-calc.dark {
  --bg: #0f1114;
  --text: #e8e8e8;
  --card: #141618;
  --muted: #9a9a9a;
}

.utar-calc {
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color: var(--text);
  background: var(--bg);
  max-width: 920px;
  margin: 18px auto;
  padding: 18px;
  border-radius: var(--radius);
  box-shadow: 0 8px 30px rgba(20,20,20,0.06);
}

/* Header */
.calc-header{
  display:flex;
  gap:12px;
  align-items:center;
  justify-content:space-between;
  margin-bottom:10px;
}
.calc-header h2{ margin:0; font-size:20px; color:var(--accent); }

/* Buttons */
.btn{
  border:1px solid rgba(0,0,0,0.08);
  background:transparent;
  padding:8px 10px;
  border-radius:8px;
  cursor:pointer;
  font-size:13px;
}
.btn.primary{ background:var(--accent); color:#fff; border:0 }
.btn.small{ padding:6px 8px; font-size:12px }
.btn.tiny{ padding:4px 6px; font-size:12px }
.btn.danger{ background:transparent; color:var(--danger); border-color:rgba(217,83,79,0.12) }
.btn.large{ padding:10px 14px; font-size:15px }

/* Muted text */
.muted{ color:var(--muted); margin:6px 0 14px; font-size:13px }

/* Semesters area */
.semester{
  background:var(--card);
  border-radius:10px;
  padding:12px;
  margin-bottom:12px;
  border:1px solid rgba(0,0,0,0.04);
}
.semester-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
}
.sem-title{ margin:0; font-size:15px }
.sem-actions{ display:flex; gap:8px }

/* Course row */
.course-row{
  display:flex;
  gap:8px;
  align-items:center;
  margin-top:10px;
  flex-wrap:wrap;
}
.course-row input, .course-row select{
  padding:8px;
  border-radius:8px;
  border:1px solid rgba(0,0,0,0.06);
  min-width:120px;
  font-size:14px;
}
.course-row .course-name{ flex:1 1 220px; min-width:140px; max-width:400px }
.course-row .credit-select, .course-row .grade-select{ width:110px }

/* Controls */
.calc-controls{
  display:flex;
  gap:18px;
  align-items:center;
  justify-content:space-between;
  margin-top:12px;
  flex-wrap:wrap;
}
.calc-controls .left{ display:flex; gap:12px; align-items:center; flex-wrap:wrap }
.calc-controls label.inline{ display:flex; gap:6px; align-items:center; font-size:13px; color:var(--muted) }
.calc-controls input[type="number"]{ width:110px; padding:8px; border-radius:8px; }

/* Results */
.resultsPanel{ margin-top:16px; background:var(--card); padding:12px; border-radius:10px; border:1px solid rgba(0,0,0,0.04) }
.summary{ margin-top:8px; font-size:15px }

/* Errors */
.errors{ margin-top:8px; color:var(--danger); font-size:13px }

/* Info tooltip (click to toggle) */
.info{
  display:inline-block;
  width:18px;height:18px;
  line-height:18px;
  text-align:center;border-radius:50%;
  background:rgba(0,0,0,0.06); color:var(--muted); margin-left:6px;
  cursor:pointer; font-size:12px;
  position:relative;
}
.info.active{ background:var(--accent); color:#fff }
.info-popup{
  position:absolute; top:26px; left:50%; transform:translateX(-50%);
  background:var(--card); color:var(--text);
  padding:8px 10px; border-radius:8px; min-width:180px; box-shadow:0 6px 20px rgba(0,0,0,0.12);
  font-size:13px; z-index:60; border:1px solid rgba(0,0,0,0.06)
}

/* Responsive */
@media (max-width:700px){
  .course-row .credit-select, .course-row .grade-select{ width:90px }
  .calc-header{ flex-direction:column; align-items:flex-start; gap:8px }
}