/* ---------- Global Reset ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  color: #eaeaea;
  background: linear-gradient(135deg, #0f0f0f, #1a1a1a);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 2rem 1rem;
}

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: 800px;
}

/* ---------- Header ---------- */
header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(90deg, #00ff88, #00c3ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Travel Container ---------- */
.travel-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* ---------- Card ---------- */
.card {
  background: rgba(30, 30, 30, 0.9);
  border-radius: 18px;
  padding: 2rem;
  backdrop-filter: blur(14px);
  box-shadow: 0 6px 22px rgba(0,0,0,0.7), inset 0 0 12px rgba(0, 255, 180, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.08);
  animation: fadeIn 0.8s ease-in-out;
}

.card h2 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: #00ff88;
}

/* ---------- Labels & Inputs ---------- */
label {
  font-weight: 600;
  display: block;
  margin-bottom: 0.5rem;
  color: #bbbbbb;
}

input[type="number"] {
  width: 100%;
  padding: 0.8rem 1rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  outline: none;
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-size: 1rem;
  margin-bottom: 1rem;
}

/* ---------- Buttons ---------- */
button {
  background: linear-gradient(135deg, #00ff88, #00c3ff);
  border: none;
  color: #111;
  font-weight: 600;
  padding: 0.75rem 1.6rem;
  border-radius: 30px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  box-shadow: 0 0 12px rgba(0, 200, 255, 0.4);
}

button:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 0 20px rgba(0, 200, 255, 0.7);
}

/* ---------- Budget Result ---------- */
#budgetResult {
  font-size: 1rem;
  color: #f0f0f0;
  line-height: 1.5;
  padding: 1rem;
  border-radius: 12px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  min-height: 80px;
}

/* ---------- Animation ---------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .card {
    padding: 1.5rem;
  }
  header h1 {
    font-size: 1.6rem;
  }
}