* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #1a1a2e, #16213e, #0f3460);
  min-height: 100vh;
  padding: 30px 16px;
  color: #eee;
}

.container {
  max-width: 780px;
  margin: auto;
  background: rgba(255,255,255,0.05);
  border-radius: 16px;
  padding: 32px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.1);
}

h1 { text-align: center; font-size: 2rem; margin-bottom: 28px; color: #e94560; }
h2 { font-size: 1.3rem; margin-bottom: 16px; color: #a8dadc; }
hr { border: none; border-top: 1px solid rgba(255,255,255,0.1); margin: 28px 0; }

/* Subject Row */
.subject-row {
  display: flex; gap: 10px; margin-bottom: 10px; flex-wrap: wrap;
}
.subject-row input {
  flex: 1; min-width: 100px; padding: 10px 12px;
  border-radius: 8px; border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08); color: #fff; font-size: 0.9rem;
}
.subject-row input::placeholder { color: #aaa; }
.subject-row input:focus { outline: none; border-color: #e94560; }

.remove-btn {
  background: #e94560; border: none; color: white;
  border-radius: 8px; padding: 8px 12px; cursor: pointer; font-size: 1rem;
}
.remove-btn:hover { background: #c73652; }

/* Semester Row (CGPA) */
.semester-row {
  display: flex; gap: 10px; margin-bottom: 10px; align-items: center;
}
.semester-row input {
  flex: 1; padding: 10px 12px;
  border-radius: 8px; border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08); color: #fff; font-size: 0.9rem;
}
.semester-row input:focus { outline: none; border-color: #e94560; }
.semester-row label { min-width: 130px; color: #ccc; font-size: 0.9rem; }

/* Buttons */
.btn-group { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
button {
  padding: 10px 18px; border: none; border-radius: 8px;
  cursor: pointer; font-size: 0.9rem; font-weight: 600; transition: 0.2s;
}
button:not(.remove-btn) { background: #e94560; color: white; }
button:not(.remove-btn):hover { background: #c73652; transform: translateY(-1px); }

#add-to-cgpa-btn {
  margin-top: 12px; background: #457b9d !important;
}
#add-to-cgpa-btn:hover { background: #1d3557 !important; }

/* Result Box */
.result-box {
  margin-top: 16px; padding: 16px 20px;
  border-radius: 10px; background: rgba(233,69,96,0.15);
  border: 1px solid #e94560; font-size: 1.1rem; font-weight: 600;
  color: #f1faee;
}
.result-box.cgpa { border-color: #457b9d; background: rgba(69,123,157,0.15); }
.hidden { display: none; }