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

body {
    background: #0d1117;
    color: #c9d1d9;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card {
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 8px;
    padding: 40px 36px;
    width: 100%;
    max-width: 360px;
}

.logo {
    text-align: center;
    margin-bottom: 28px;
}

.logo h1 {
    font-size: 20px;
    font-weight: 600;
    color: #e6edf3;
    letter-spacing: 0.5px;
}

.logo p {
    color: #8b949e;
    font-size: 13px;
    margin-top: 4px;
}

.form-group {
    margin-bottom: 16px;
}

label {
    display: block;
    font-size: 13px;
    color: #8b949e;
    margin-bottom: 6px;
}

input[type="email"],
input[type="password"] {
    width: 100%;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 6px;
    color: #e6edf3;
    font-size: 14px;
    padding: 8px 12px;
    outline: none;
    transition: border-color 0.15s;
}

input[type="email"]:focus,
input[type="password"]:focus {
    border-color: #388bfd;
}

.error-msg {
    color: #f85149;
    font-size: 12px;
    margin-top: 5px;
}

.remember {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    font-size: 13px;
    color: #8b949e;
    cursor: pointer;
}

.remember input[type="checkbox"] {
    accent-color: #388bfd;
}

.btn-login {
    width: 100%;
    background: #238636;
    border: 1px solid #2ea043;
    border-radius: 6px;
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    padding: 9px;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-login:hover {
    background: #2ea043;
}