body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

:root {
  --bg: #f9fafc;
  --text: #333;
  --header-bg: #007bff;
  --header-text: white;
  --button-bg: #007bff;
  --button-hover: #0056b3;
  --card-bg: white;
  --card-shadow: rgba(0,0,0,0.05);
}

[data-theme="dark"] {
  --bg: #181a1b;
  --text: #e6e6e6;
  --header-bg: #111;
  --header-text: #ddd;
  --button-bg: #28a745;
  --button-hover: #1e7e34;
  --card-bg: #242526;
  --card-shadow: rgba(0,0,0,0.4);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  background: var(--header-bg);
  color: var(--header-text);
  position: sticky;
  top: 0;
  z-index: 1000;
}

header .logo {
  font-size: 20px;
  font-weight: bold;
}

header nav a {
  color: var(--header-text);
  margin-left: 15px;
  text-decoration: none;
  font-size: 14px;
}

header nav a:hover {
  text-decoration: underline;
}

.theme-toggle {
  background: transparent;
  border: none;
  color: var(--header-text);
  font-size: 20px;
  cursor: pointer;
}

.hero {
  text-align: center;
  padding: 50px 20px;
  background: var(--card-bg);
  box-shadow: 0 2px 8px var(--card-shadow);
}

.hero h1 {
  margin-bottom: 10px;
}

.hero p {
  color: var(--text);
  margin-bottom: 20px;
}

.form {
  display: flex;
  justify-content: center;
  gap: 10px;
  max-width: 500px;
  margin: 0 auto;
}

input {
  flex: 1;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  background: var(--bg);
  color: var(--text);
}

button {
  background: var(--button-bg);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background: var(--button-hover);
}

.status {
  margin-top: 20px;
}

.hidden {
  display: none;
}

.spinner {
  border: 4px solid #f3f3f3;
  border-top: 4px solid var(--button-bg);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  animation: spin 1s linear infinite;
  margin: 0 auto 10px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.formats {
  margin-top: 15px;
  display: flex;
  justify-content: center;
  gap: 10px;
}

.formats button {
  background: #28a745;
  padding: 8px 15px;
  font-size: 14px;
}

.formats button:hover {
  background: #1e7e34;
}

#downloadStatus {
  margin-top: 15px;
  color: var(--button-bg);
}

.supported, .how-it-works, .about {
  padding: 40px 20px;
  text-align: center;
}

.supported h2, .how-it-works h2, .about h2 {
  margin-bottom: 20px;
}

.sites {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}

.sites span {
  background: #f1f3f5;
  padding: 10px 15px;
  border-radius: 8px;
  font-size: 14px;
}

[data-theme="dark"] .sites span {
  background: #2c2f31;
}

.steps {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}

.step {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 6px var(--card-shadow);
  width: 200px;
}

footer {
  text-align: center;
  padding: 20px;
  background: #f1f3f5;
  color: #555;
  margin-top: 20px;
}

[data-theme="dark"] footer {
  background: #111;
  color: #aaa;
}