:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2a2a2a;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --accent: #667eea;
  --accent-hover: #5568d3;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --border: #333333;
  --border-light: #444444;
  --shadow: rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: var(--accent-hover);
}

.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.3s;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #818cf8);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(102, 126, 234, 0.3);
  color: white;
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--border-light);
  color: var(--text-primary);
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
  color: white;
}

.btn-large {
  padding: 14px 32px;
  font-size: 18px;
}

.btn-small {
  padding: 6px 12px;
  font-size: 14px;
}

.btn-full {
  width: 100%;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="file"],
textarea,
select {
  width: 100%;
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 16px;
  transition: all 0.3s;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text-primary);
}

.help-text {
  margin-top: 6px;
  font-size: 14px;
  color: var(--text-secondary);
}

.alert {
  padding: 16px 20px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--success);
  color: var(--success);
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
}

.navbar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar .logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--accent), #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar .logo:hover {
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 16px;
  align-items: center;
}

.language-toggle {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border-radius: 6px;
}

.language-toggle a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
}

.language-toggle a.active {
  color: var(--accent);
}

.language-toggle span {
  color: var(--border);
}

.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 80px;
  text-align: center;
  color: var(--text-secondary);
}

.text-muted {
  color: var(--text-muted);
}

code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--accent);
}