/* UOS GPA Calculator (CSS) */
/* Theme: Pink #F43676, rounded, mobile-first */

:root{
  --pink: #F43676;
  --pink-dark: #d22b63;
  --bg: #ffffff;
  --text: #222;
  --muted: #666;
  --card-shadow: 0 6px 22px rgba(8,8,8,0.06);
  --radius: 14px;
  --max-width: 900px;
}

#uos-gpa-calculator {
  max-width: var(--max-width);
  margin: 18px auto;
  background: var(--bg);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 18px;
  font-family: Inter, "Segoe UI", Roboto, system-ui, sans-serif;
  color: var(--text);
}

/* Header */
.uos-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:12px;
}
.uos-header h2{
  font-size:18px;
  margin:0;
  color:var(--pink);
  letter-spacing:0.2px;
}

/* Theme switch */
.switch { position: relative; display:inline-block; width:44px; height:26px; }
.switch input { opacity:0; width:0; height:0; }
.slider {
  position:absolute; cursor:pointer; inset:0; background:#ddd; border-radius:30px; transition:all .2s;
}
.slider:before {
  content:""; position:absolute; height:20px; width:20px; left:3px; top:3px; background:#fff; border-radius:50%; box-shadow:0 2px 6px rgba(0,0,0,0.12); transition:all .2s;
}
.switch input:checked + .slider { background: var(--pink); }
.switch input:checked + .slider:before { transform: translateX(18px); }

/* Semester card */
.semester{
  margin-bottom:14px;
  padding:12px;
  border-radius:12px;
  border:1px solid rgba(0,0,0,0.04);
  background:linear-gradient(180deg, rgba(255,255,255,0.9), rgba(255,255,255,0.96));
}
.semester-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:10px;
}
.semester-head h2{ font-size:15px; margin:0; color:var(--pink); }

.semester-controls { display:flex; gap:8px; align-items:center; }

/* Course row */
.course-row{
  display:flex;
  gap:8px;
  align-items:center;
  margin-bottom:8px;
}
.course-row input, .course-row select{
  padding:8px 10px;
  border-radius:10px;
  border:1px solid rgba(0,0,0,0.08);
  font-size:14px;
}
.course-code{ flex:1 1 40%; min-width:90px; }
.credit-hours{ width:92px; }
.grade-select{ width:130px; }

/* Buttons */
.btn{
  background:#fff;
  color:var(--text);
  border:1px solid rgba(0,0,0,0.08);
  padding:8px 12px;
  border-radius:10px;
  cursor:pointer;
  font-weight:600;
  font-size:14px;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.btn.small{ padding:6px 8px; font-size:13px; border-radius:8px; }
.btn.tiny{ padding:6px 8px; font-size:12px; border-radius:8px; }
.btn.primary{
  background: linear-gradient(90deg,var(--pink),var(--pink-dark));
  color:#fff; border:none;
}
.actions-row{
  display:flex;
  gap:10px;
  margin-top:12px;
  justify-content:flex-start;
  align-items:center;
  flex-wrap:wrap;
}
.actions-row .btn{ min-width:120px; text-align:center; }

/* Global controls */
.global-controls{ margin-top:8px; }

/* Results */
.results{ margin-top:14px; padding:12px; border-radius:10px; background:#fafafa; border:1px solid rgba(0,0,0,0.03); }
.results .results-content p{ margin:6px 0; font-weight:600; }
.muted{ color:var(--muted); font-size:13px; }

/* Footer */
.uos-footer{ margin-top:12px; font-size:12px; color:var(--muted); text-align:left; }

/* Responsive: mobile first */
@media(min-width:640px){
  .course-row input, .course-row select{ font-size:15px; }
  .credit-hours{ width:110px; }
  .grade-select{ width:150px; }
}

/* Dark mode */
.uos-dark{
  background:#0f1720;
  color:#e6eef7;
  box-shadow:none;
}
.uos-dark .semester{ background:linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)); border:1px solid rgba(255,255,255,0.04); }
.uos-dark .course-row input, .uos-dark .course-row select{ background:#0b1220; color:#e6eef7; border:1px solid rgba(255,255,255,0.04); }
.uos-dark .btn{ background:transparent; color:#e6eef7; border:1px solid rgba(255,255,255,0.06); }
.uos-dark .btn.primary{ border:none; }
.uos-dark .results{ background:#07101a; border:1px solid rgba(255,255,255,0.03); }

/* Accessibility focus */
.course-row input:focus, .course-row select:focus, .btn:focus { outline:2px solid rgba(244,54,118,0.18); outline-offset:2px; }