* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'JetBrains Mono', monospace;
}

body {
  background: #050505;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,0.06), transparent 40%),
    radial-gradient(circle at 80% 0%, rgba(255,255,255,0.04), transparent 40%);
  z-index: -1;
}

h1 {
  font-size: 3.2rem;
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: -2px;
  background: linear-gradient(90deg, #fff, #888);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: #555;
  text-align: center;
  max-width: 600px;
  margin-bottom: 60px;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  width: 100%;
  max-width: 950px;
}

.card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 22px;
  padding: 26px;
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.08), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.card:hover::after {
  opacity: 1;
}

.card:hover {
  transform: translateY(-2px) scale(1.005);
  border-color: rgba(255,255,255,0.18);
  box-shadow: 0 6px 25px rgba(0,0,0,0.5);
}

.card h2 {
  margin-bottom: 10px;
  font-size: 1.2rem;
}

.card p {
  font-size: 0.85rem;
  color: #666;
  margin-bottom: 22px;
  line-height: 1.5;
}

.btn {
  width: 100%;
  padding: 13px;
  border-radius: 12px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.15);
  background: linear-gradient(145deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
  color: #fff;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn:hover {
  background: #fff;
  color: #000;
  box-shadow: 0 0 25px rgba(255,255,255,0.25);
}

.btn:active {
  transform: scale(0.96);
}

footer {
  margin-top: 80px;
  font-size: 0.7rem;
  color: #222;
  letter-spacing: 2px;

  pointer-events: none;
  user-select: none;
}

.input {
  width: 100%;
  padding: 13px;
  margin-bottom: 12px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  color: #fff;
  outline: none;
  font-size: 0.85rem;
  transition: all 0.2s ease;
}

.input::placeholder {
  color: #444;
}

.input:focus {
  border-color: rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.06);
}

input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type=number] {
  -moz-appearance: textfield;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;

  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: linear-gradient(160deg, #0d0d0d, #050505);
  padding: 28px;
  border-radius: 20px;
  width: 100%;
  max-width: 500px;
  border: 1px solid rgba(255,255,255,0.08);

  transform: scale(0.9) translateY(12px);
  opacity: 0;
  transition: all 0.25s ease;
}

.modal.active .modal-content {
  transform: scale(1) translateY(0);
  opacity: 1;
}

.close-btn {
  position: absolute;
  top: 12px;
  right: 15px;
  font-size: 18px;
  color: #666;
  cursor: pointer;
  transition: all 0.2s ease;
}

.close-btn:hover {
  color: #fff;
  transform: rotate(90deg) scale(1.1);
}