* { box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { background-color: #0d1117; color: #e6edf3; margin: 0; padding: 0; display: flex; flex-direction: column; align-items: center; min-height: 100vh; }

header { width: 100%; padding: 20px 40px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid #30363d; background-color: #161b22; }
.logo { font-size: 24px; font-weight: bold; color: #3fb950; }

.container { margin-top: 60px; width: 100%; max-width: 600px; padding: 20px; }
.card { background-color: #161b22; border: 1px solid #30363d; border-radius: 12px; padding: 40px; text-align: center; box-shadow: 0 8px 24px rgba(0,0,0,0.5); }
.card h1 { margin-top: 0; color: #ffffff; }

.input-group { display: flex; flex-direction: column; gap: 15px; margin-top: 30px; }
input[type="email"] { padding: 12px; border-radius: 6px; border: 1px solid #30363d; background-color: #0d1117; color: white; font-size: 16px; outline: none; }
input[type="email"]:focus { border-color: #3fb950; }

.btn { padding: 12px 24px; border-radius: 6px; border: none; font-size: 16px; font-weight: bold; cursor: pointer; text-decoration: none; transition: 0.2s; }
.btn.primary { background-color: #2ea043; color: white; }
.btn.primary:hover { background-color: #238636; }

.btn-small { padding: 8px 12px; border-radius: 6px; background-color: #da3633; color: white; border: none; cursor: pointer; font-weight: bold; }
.btn-small:hover { background-color: #b62324; }

.download-buttons { display: flex; justify-content: center; gap: 20px; margin-top: 30px; }
.btn.windows { background-color: #0078d4; color: white; }
.btn.mac { background-color: #ffffff; color: black; }
.btn:hover { transform: translateY(-3px); }

.msg { color: #8b949e; margin-top: 15px; font-size: 14px; }
.warning { font-size: 12px; color: #8b949e; margin-top: 30px; }