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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #1a1a2e;
  color: #e0e0e0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
}

h1 {
  font-size: 1.5rem;
  margin: 1rem 0;
  color: #fff;
}

.drop-zone {
  width: 100%;
  max-width: 500px;
  border: 3px dashed #444;
  border-radius: 16px;
  padding: 3rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background: #16213e;
}

.drop-zone.drag-over {
  border-color: #4cc9f0;
  background: #1a2a4a;
}

.drop-zone p {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: #aaa;
}

.drop-zone .browse-btn {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  background: #4361ee;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
}

.drop-zone .browse-btn:active {
  background: #3a56d4;
}

#file-input {
  display: none;
}

#status {
  margin: 1.5rem 0;
  font-size: 0.95rem;
  color: #aaa;
  text-align: center;
  min-height: 1.5em;
}

#status.error {
  color: #f07070;
}

.drop-zone.converting {
  cursor: default;
}

.drop-zone.converting p {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0;
}

#result {
  display: none;
  width: 100%;
  max-width: 500px;
  margin-top: 0.5rem;
  text-align: center;
}

#result img {
  max-width: 100%;
  border-radius: 12px;
  margin-bottom: 1rem;
}

.download-btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: #2ec4b6;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
}

.download-btn:active {
  background: #25a99d;
}

footer {
  margin-top: auto;
  padding: 2rem 0 1rem;
  font-size: 0.85rem;
}

footer a {
  color: #888;
  text-decoration: none;
}

footer a:hover {
  color: #ccc;
}