:root {
    --bg-dark: #0d1117;
    --primary-blue: #58a6ff;
    --card-bg: #161b22;
}

body {
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--bg-dark);
    font-family: 'Segoe UI', sans-serif;
    color: white;
}

.auth-container {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid #30363d;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    width: 350px;
}

h2 { color: var(--primary-blue); margin-bottom: 10px; text-align: center; }
p { color: #8b949e; text-align: center; margin-bottom: 25px; font-size: 0.9rem; }

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

input {
    width: 100%;
    padding: 12px;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 6px;
    color: white;
    box-sizing: border-box;
}

input:focus { border-color: var(--primary-blue); outline: none; }

.btn-auth {
    width: 100%;
    padding: 12px;
    background: var(--primary-blue);
    border: none;
    border-radius: 6px;
    color: #0d1117;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.btn-auth:hover { opacity: 0.9; transform: scale(1.02); }

.auth-footer { margin-top: 20px; text-align: center; font-size: 0.85rem; color: #8b949e; }
.auth-footer a { color: var(--primary-blue); text-decoration: none; }