* {
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, sans-serif;
}

body {
  margin: 0;
  background: #252525;
  color: #fff;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  background: #000000;
  padding: 30px;
  border-radius: 16px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 50px rgba(0,0,0,.6);
  text-align: center;
}

h1 {
  margin-bottom: 8px;
}

.subtitle {
  font-size: 14px;
  color: #9ca3af;
  margin-bottom: 20px;
}

.file-box {
  display: block;
  background: #1f2937;
  border: 2px dashed #374151;
  padding: 18px;
  border-radius: 12px;
  cursor: pointer;
  margin-bottom: 15px;
}

.file-box span {
  color: #d1d5db;
}

.file-box input {
  display: none;
}

select {
  width: 100%;
  padding: 14px;
  border-radius: 10px;
  border: none;
  margin-bottom: 15px;
  background: #1f2937;
  color: #fff;
}

.btn {
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  border: none;
  background: #ffb500;
  color: #000;
  font-weight: bold;
  cursor: pointer;
}

.btn:hover {
  background: #e0a400;
}

.note {
  font-size: 12px;
  color: #9ca3af;
  margin-top: 15px;
}

.loader {
  margin-top: 15px;
  border: 4px solid #374151;
  border-top: 4px solid #22c55e;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  animation: spin 1s linear infinite;
  margin-left: auto;
  margin-right: auto;
}

.hidden {
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}


.credit {
  margin-top: 18px;
  font-size: 12px;
  color: #9ca3af;
  opacity: 0.8;
}