/* css/style.css - Unchanged from previous, keeping premium design */
:root {
  --primary-gradient: linear-gradient(135deg, #0a2b3e, #1b4f6e);
  --glass-bg: rgba(255, 255, 255, 0.92);
  --glass-border: rgba(255, 255, 255, 0.3);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --accent-gold: #f7b42c;
}
* {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(2px);
  border-radius: 2rem !important;
  box-shadow: var(--shadow-xl);
  transition: transform 0.2s ease;
}
.glass-card:hover {
  transform: translateY(-3px);
}
.gradient-text {
  background: linear-gradient(130deg, #0f2b3d, #2c6e8f);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}
.bg-primary-glow {
  background: #1e6f9f;
  color: white;
  box-shadow: 0 4px 12px rgba(30,111,159,0.3);
}
.form-control, .input-group-text {
  border-radius: 1rem !important;
  transition: all 0.2s;
}
.form-control:focus {
  box-shadow: 0 0 0 3px rgba(30,111,159,0.25);
  border-color: #1e6f9f;
}
.btn-primary {
  background: #1b4f6e;
  border: none;
  border-radius: 2rem !important;
  transition: all 0.25s ease;
  font-weight: 600;
}
.btn-primary:hover:not(:disabled) {
  background: #0f3b52;
  transform: scale(0.98);
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}
.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: #96b3c2;
}
.btn-outline-secondary {
  border-radius: 2rem !important;
  border-width: 1.5px;
}
.shadow-btn {
  box-shadow: 0 8px 14px -6px rgba(27,79,110,0.4);
}
.invalid-field {
  border-color: #dc3545 !important;
  box-shadow: 0 0 0 1px #dc3545;
}
.invalid-feedback {
  font-size: 0.8rem;
  animation: shakeFade 0.3s ease;
}
@keyframes shakeFade {
  0% { opacity: 0; transform: translateX(-4px);}
  50% { transform: translateX(2px);}
  100% { opacity: 1; transform: translateX(0);}
}
.loading-state {
  background: rgba(255,255,240,0.7);
  border-radius: 1.5rem;
  padding: 1rem;
}
.results-area {
  animation: slideUpFade 0.5s cubic-bezier(0.2, 0.9, 0.4, 1.1);
}
@keyframes slideUpFade {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.result-card {
  background: white;
  border-radius: 1.25rem;
  transition: all 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
  border: 1px solid rgba(0,0,0,0.05);
}
.result-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 20px -12px rgba(0,0,0,0.15);
}
.result-value {
  font-size: 1.6rem;
  font-weight: 800;
  color: #1b4f6e;
}
.result-label {
  font-weight: 500;
  letter-spacing: -0.2px;
}
.final-total-card {
  background: linear-gradient(115deg, #1b4f6e 0%, #14455f 100%);
  color: white;
}
.final-total-card .result-value {
  color: #ffdd99;
}
.divider-custom {
  height: 3px;
  background: linear-gradient(90deg, #1e6f9f, transparent);
  width: 80px;
  margin-bottom: 1rem;
  border-radius: 3px;
}
@media (max-width: 768px) {
  .result-value {
    font-size: 1.3rem;
  }
  .glass-card {
    border-radius: 1.5rem !important;
  }
}
button:focus, input:focus {
  outline: 2px solid #1e6f9f;
  outline-offset: 1px;
}
.form-check-input:checked {
  background-color: #1b4f6e;
  border-color: #1b4f6e;
}